@import "../css/style.css";

/* Remote/keyboard (TV D-pad) navigation — a clear, app-wide focus ring for
   elements UI.makeFocusable() marks (batch/subject/chapter/test "cards" —
   plain divs that don't get a browser default focus outline). Additive only:
   existing per-component :focus rules elsewhere in this file are untouched. */
[role="button"]:focus-visible,
.batch-card:focus-visible,
.subject-card:focus-visible,
.chapter-item:focus-visible,
.mtp-item:focus-visible,
.vocab-test-card:focus-visible,
.wtp-test-card:focus-visible {
  outline: 3px solid var(--accent, #60a5fa);
  outline-offset: 2px;
}

body.student-app {
  min-height: 100vh;
  --board-zoom: 1;
  --board-shell-max: 1720px;
  --board-stage-max: 1580px;
  --board-panel-bg: rgba(18, 22, 33, 0.82);
  --board-panel-border: rgba(255, 255, 255, 0.12);
  --board-glow: 0 24px 80px rgba(0, 0, 0, 0.38);
}

.tb-brand {
  display: none;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.tb-brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, #16b8ff, #1473ff);
  box-shadow: 0 8px 22px rgba(20, 115, 255, 0.35);
}

.tb-brand-text {
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.nav-btn-icon {
  line-height: 1;
  flex-shrink: 0;
}

.nav-btn-label {
  display: none;
  white-space: nowrap;
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.board-zoom-control {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 54px;
  padding: 0 12px;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.06);
  color: #f8fbff;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.22);
}

.board-zoom-btn {
  width: 34px;
  height: 34px;
  border: 0;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.1);
  color: inherit;
  font-size: 1.2rem;
  font-weight: 800;
  cursor: pointer;
}

.board-zoom-btn:disabled {
  opacity: 0.4;
  cursor: default;
}

.board-zoom-value {
  min-width: 56px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.mode-board.theme-board-dark {
  --board-panel-bg: rgba(18, 22, 33, 0.82);
  --board-panel-border: rgba(255, 255, 255, 0.12);
  --board-glow: 0 24px 80px rgba(0, 0, 0, 0.38);
}

.mode-board.theme-board-light {
  --board-panel-bg: rgba(250, 252, 255, 0.92);
  --board-panel-border: rgba(33, 58, 88, 0.16);
  --board-glow: 0 22px 70px rgba(39, 63, 97, 0.14);
}

body.student-app.mode-board {
  font-size: 19px;
  background:
    radial-gradient(circle at top center, rgba(64, 105, 255, 0.16), transparent 30%),
    radial-gradient(circle at 15% 10%, rgba(28, 204, 153, 0.14), transparent 20%),
    linear-gradient(180deg, #0b0f1a 0%, #141927 42%, #0a0d16 100%);
}

body.student-app.mode-board::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: radial-gradient(circle at center, black 42%, transparent 92%);
  opacity: 0.55;
}

body.student-app.mode-board.theme-board-light {
  color: #142235;
  background:
    radial-gradient(circle at top center, rgba(68, 130, 255, 0.12), transparent 30%),
    radial-gradient(circle at 12% 12%, rgba(44, 203, 176, 0.1), transparent 18%),
    linear-gradient(180deg, #f8fbff 0%, #edf3fb 46%, #e6eef9 100%);
}

body.student-app.mode-board.theme-board-light::before {
  background:
    linear-gradient(rgba(25, 59, 100, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(25, 59, 100, 0.035) 1px, transparent 1px);
  opacity: 0.38;
}

.mode-board .app-shell {
  position: relative;
}

.mode-board .top-nav {
  width: min(calc(100% - 28px), var(--board-shell-max));
  margin: 14px auto 0;
  min-height: 88px;
  padding: 16px 22px;
  border: 1px solid var(--board-panel-border);
  border-radius: 26px;
  /* backdrop-filter removed — always-visible bar, see .top-nav above */
  background: linear-gradient(180deg, rgba(18, 22, 34, 0.97), rgba(12, 16, 27, 0.94));
  box-shadow: var(--board-glow);
  zoom: var(--board-zoom);
}

.mode-board .nav-left,
.mode-board .nav-right {
  gap: 12px;
}

.mode-board .tb-brand {
  display: inline-flex;
}

.mode-board .breadcrumb {
  max-width: 320px;
  padding: 10px 18px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  color: rgba(255, 255, 255, 0.78);
  font-size: 1rem;
}

.mode-board .session-score {
  gap: 14px;
}

.mode-board .score-item {
  min-width: 78px;
  padding: 9px 14px;
  border-radius: 999px;
  font-size: 1rem;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.mode-board .nav-btn {
  width: auto;
  min-width: 56px;
  height: 54px;
  padding: 0 16px;
  gap: 10px;
  border-radius: 18px;
  border-color: rgba(255, 255, 255, 0.1);
  /* backdrop-filter removed — always-visible nav buttons, blur per-button adds up */
  background: rgba(40, 44, 56, 0.9);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.22);
}

.mode-board .nav-btn:hover {
  transform: translateY(-1px);
}

.mode-board .nav-btn-label {
  display: inline;
}

.mode-board #btn-home .nav-btn-label,
.mode-board #btn-back .nav-btn-label {
  display: none;
}

.mode-board #btn-admin .nav-btn-label {
  display: none;
}

.mode-board #btn-theme,
.mode-board #btn-ui-mode {
  background: rgba(255, 255, 255, 0.09);
}

.mode-board #btn-theme {
  min-width: 150px;
}

.mode-board #btn-ui-mode {
  min-width: 138px;
  color: #fff;
  background: linear-gradient(135deg, rgba(255, 193, 7, 0.92), rgba(255, 145, 0, 0.92));
  border-color: rgba(255, 210, 93, 0.45);
}

.mode-board .screens-wrap {
  position: relative;
  padding-bottom: 72px; /* clears the always-visible bottom-nav — see BOTTOM NAVIGATION rules */
}

.mode-board .screen {
  max-width: var(--board-shell-max);
  padding: 28px 22px 48px;
  zoom: var(--board-zoom);
}

.mode-board #screen-quiz,
.mode-board #screen-test-player,
.mode-board #tp-quiz-view {
  position: relative;
}

.mode-board #screen-home {
  max-width: 1480px;
}

.mode-board .home-banners,
.mode-board .home-share-btn,
.mode-board .home-search-bar,
.mode-board .home-search-results,
.mode-board .stats-grid,
.mode-board .home-section {
  max-width: 1480px;
  margin-left: auto;
  margin-right: auto;
}

.mode-board .stats-grid {
  gap: 18px;
}

.mode-board .stat-card,
.mode-board .batch-card,
.mode-board .subject-card,
.mode-board .chapter-item,
.mode-board .lesson-card,
.mode-board .test-card {
  border-color: rgba(255, 255, 255, 0.08);
  background: linear-gradient(180deg, rgba(21, 27, 41, 0.86), rgba(12, 17, 28, 0.86));
  box-shadow: var(--board-glow);
}

.mode-board .section-label {
  font-size: 1.45rem;
  letter-spacing: 0.02em;
}

.mode-board .quiz-header,
.mode-board .progress-wrap,
.mode-board #tp-full-timer-wrap,
.mode-board .timer-wrap,
.mode-board .feedback-bar,
.mode-board .quiz-nav {
  max-width: var(--board-stage-max);
  margin-left: auto;
  margin-right: auto;
}

.mode-board .quiz-header {
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
  padding: 18px 22px;
  border-radius: 26px;
  border: 1px solid var(--board-panel-border);
  /* backdrop-filter removed — persistent through the whole quiz */
  background: var(--board-panel-bg-solid, rgba(18, 22, 34, 0.97));
  box-shadow: var(--board-glow);
}

.mode-board .quiz-meta,
.mode-board .quiz-meta-right,
.mode-board .quiz-controls {
  gap: 14px;
}

.mode-board .quiz-chapter {
  max-width: 700px;
  font-size: clamp(1.35rem, 2vw, 1.95rem);
  font-weight: 800;
  color: #fff;
}

.mode-board .quiz-mode-badge,
.mode-board .diff-badge,
.mode-board .tp-section-badge,
.mode-board .tp-marks-badge {
  padding: 9px 18px;
  border-radius: 999px;
  font-size: 0.98rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.05);
}

.mode-board .quiz-controls .ctrl-btn,
.mode-board .quiz-controls .timer-select-wrap,
.mode-board .tp-live-score {
  min-height: 54px;
  padding: 0 18px;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.09);
  background: rgba(255, 255, 255, 0.06);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.mode-board .timer-select-wrap select {
  font-size: 1rem;
}

.mode-board .progress-wrap {
  align-items: center;
  gap: 18px;
  margin-bottom: 18px;
  padding: 10px 18px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.04);
}

.mode-board .progress-bar,
.mode-board .tp-full-timer-bar {
  height: 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
}

.mode-board .progress-fill,
.mode-board .tp-full-timer-fill {
  border-radius: 999px;
}

.mode-board .progress-text,
.mode-board .tp-full-timer-text {
  min-width: 92px;
  font-size: 1.05rem;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.86);
}

.mode-board .timer-wrap,
.mode-board #tp-full-timer-wrap {
  position: absolute;
  top: 108px;
  right: 22px;
  z-index: 6;
  margin: 0;
  padding: 12px 16px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 24px;
  /* backdrop-filter removed — floating timer stays visible throughout the quiz */
  background: rgba(12, 16, 27, 0.96);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.24);
}

.mode-board .timer-wrap::before,
.mode-board #tp-full-timer-wrap::before {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.58);
}

.mode-board .timer-wrap::before {
  content: "Timer";
}

.mode-board #tp-full-timer-wrap::before {
  content: "Test Clock";
}

.mode-board .timer-wrap {
  width: auto;
  height: auto;
  min-width: 150px;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
}

.mode-board #tp-full-timer-wrap {
  width: 228px;
  gap: 8px;
}

.mode-board .timer-ring {
  display: none;
}

.mode-board .timer-count,
.mode-board #tp-timer-count,
.mode-board #tp-full-timer-text {
  min-width: 0;
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: #f8fbff;
}

.mode-board .tp-full-timer-bar {
  width: 100%;
  height: 8px;
}

.mode-board .question-card {
  width: min(100%, var(--board-stage-max));
  margin: 0 auto 22px;
  min-height: 760px;
  padding: 38px 36px 34px;
  border-radius: 30px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background:
    radial-gradient(circle at top right, rgba(57, 91, 255, 0.18), transparent 28%),
    linear-gradient(180deg, rgba(20, 26, 38, 0.98), rgba(10, 13, 21, 0.98));
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.42);
}

.mode-board .q-number {
  width: fit-content;
  min-width: 82px;
  padding: 8px 18px;
  margin-bottom: 18px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.05);
  font-size: 1.05rem;
  letter-spacing: 0.03em;
}

.mode-board .q-image-wrap {
  margin-bottom: 22px;
}

.mode-board .q-text,
.mode-board #q-text,
.mode-board #tp-q-text {
  margin-bottom: 32px;
  font-size: clamp(2.25rem, 3.3vw, 3.7rem);
  line-height: 1.18;
  font-weight: 800;
  letter-spacing: -0.02em;
  text-align: center;
  text-wrap: balance;
}

.mode-board .options-grid,
.mode-board #options-grid,
.mode-board #tp-options-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  align-content: start;
}

.mode-board .option-btn {
  min-height: 140px;
  padding: 24px 28px;
  gap: 18px;
  border-width: 2px;
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05), 0 18px 36px rgba(0, 0, 0, 0.24);
  align-items: stretch;
}

.mode-board .option-btn:hover:not(:disabled) {
  border-color: rgba(71, 202, 255, 0.85);
  box-shadow: 0 0 0 3px rgba(71, 202, 255, 0.14), 0 18px 36px rgba(0, 0, 0, 0.28);
}

.mode-board .option-key {
  width: 82px;
  height: 74px;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.04));
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.mode-board .option-text {
  font-size: clamp(1.45rem, 2vw, 2.2rem);
  font-weight: 700;
  line-height: 1.2;
}

.mode-board .option-body {
  display: flex;
  flex: 1;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: 14px;
}

.mode-board .option-text.option-text-with-media {
  font-size: clamp(1.2rem, 1.75vw, 1.75rem);
}

.mode-board .option-media {
  width: 100%;
  min-height: 112px;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(5, 10, 20, 0.24);
  padding: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.mode-board .option-media img {
  display: block;
  width: 100%;
  max-height: 180px;
  object-fit: contain;
  border-radius: 12px;
}

.mode-board .q-text:empty,
.mode-board #q-text:empty,
.mode-board #tp-q-text:empty {
  display: none;
}

.mode-board .option-btn.correct {
  background: linear-gradient(135deg, rgba(28, 170, 117, 0.88), rgba(89, 214, 176, 0.78)) !important;
  border-color: rgba(122, 255, 204, 0.85) !important;
  color: #fff;
}

.mode-board .option-btn.correct .option-key {
  background: rgba(255, 255, 255, 0.16);
  border-color: rgba(255, 255, 255, 0.2);
  color: #fff;
}

.mode-board .option-btn.wrong {
  background: linear-gradient(135deg, rgba(168, 49, 67, 0.88), rgba(245, 92, 97, 0.76)) !important;
  border-color: rgba(255, 155, 162, 0.75) !important;
  color: #fff;
}

.mode-board .option-btn.wrong .option-key {
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 255, 255, 0.2);
  color: #fff;
}

.mode-board .tf-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.mode-board .tf-btn,
.mode-board .fib-submit-btn {
  min-height: 90px;
  border-radius: 22px;
  font-size: 1.7rem;
  font-weight: 800;
}

.mode-board .fib-wrap {
  gap: 16px;
}

.mode-board .fib-input,
.mode-board #fib-input,
.mode-board #tp-fib-input {
  min-height: 84px;
  padding: 18px 24px;
  border-radius: 20px;
  font-size: 1.45rem;
}

.mode-board .mtp-wrap {
  gap: 18px;
}

.mode-board .mtp-item {
  min-height: 84px;
  padding: 18px 22px;
  border-radius: 20px;
  font-size: 1.25rem;
}

.mode-board .feedback-bar {
  margin-top: 18px;
  margin-bottom: 20px;
  padding: 18px 24px;
  border-radius: 22px;
  font-size: 1.2rem;
  font-weight: 700;
}

.mode-board .quiz-nav {
  position: sticky;
  bottom: max(16px, env(safe-area-inset-bottom));
  z-index: 20;
  width: fit-content;
  max-width: calc(100% - 28px);
  margin-top: 8px;
  padding: 12px;
  border-radius: 24px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  /* backdrop-filter removed — sticky bar during quiz-taking, see .quiz-nav */
  background: rgba(15, 18, 29, 0.97);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.34);
}

.mode-board .nav-arrow,
.mode-board .skip-btn,
.mode-board .flag-btn,
.mode-board .action-btn {
  min-height: 64px;
  padding: 0 26px;
  border-radius: 18px;
  font-size: 1.1rem;
  font-weight: 800;
}

.mode-board .results-card {
  max-width: 1320px;
  margin: 0 auto;
  padding: 44px 42px;
  border-radius: 30px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: linear-gradient(180deg, rgba(20, 26, 38, 0.96), rgba(10, 14, 21, 0.96));
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.42);
}

.mode-board.theme-board-light .top-nav,
.mode-board.theme-board-light .quiz-header,
.mode-board.theme-board-light .question-card,
.mode-board.theme-board-light .results-card,
.mode-board.theme-board-light .quiz-nav,
.mode-board.theme-board-light .timer-wrap,
.mode-board.theme-board-light #tp-full-timer-wrap,
.mode-board.theme-board-light .progress-wrap,
.mode-board.theme-board-light .stat-card,
.mode-board.theme-board-light .batch-card,
.mode-board.theme-board-light .subject-card,
.mode-board.theme-board-light .chapter-item,
.mode-board.theme-board-light .lesson-card,
.mode-board.theme-board-light .test-card {
  color: #142235;
  border-color: rgba(32, 59, 89, 0.12);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(240, 246, 255, 0.92));
  box-shadow: var(--board-glow);
}

.mode-board.theme-board-light .breadcrumb,
.mode-board.theme-board-light .score-item,
.mode-board.theme-board-light .quiz-mode-badge,
.mode-board.theme-board-light .diff-badge,
.mode-board.theme-board-light .tp-section-badge,
.mode-board.theme-board-light .tp-marks-badge,
.mode-board.theme-board-light .quiz-controls .ctrl-btn,
.mode-board.theme-board-light .quiz-controls .timer-select-wrap,
.mode-board.theme-board-light .tp-live-score,
.mode-board.theme-board-light .nav-btn,
.mode-board.theme-board-light .board-zoom-control {
  color: #17304d;
  border-color: rgba(32, 59, 89, 0.14);
  background: rgba(235, 243, 255, 0.88);
}

.mode-board.theme-board-light .board-zoom-btn {
  background: rgba(32, 59, 89, 0.08);
  color: #17304d;
}

.mode-board.theme-board-light .quiz-chapter,
.mode-board.theme-board-light .q-text,
.mode-board.theme-board-light #q-text,
.mode-board.theme-board-light #tp-q-text,
.mode-board.theme-board-light .progress-text,
.mode-board.theme-board-light #tp-full-timer-text,
.mode-board.theme-board-light .timer-count,
.mode-board.theme-board-light #tp-timer-count {
  color: #11243a;
}

.mode-board.theme-board-light .progress-bar,
.mode-board.theme-board-light .tp-full-timer-bar {
  background: rgba(20, 48, 79, 0.1);
}

.mode-board.theme-board-light .option-btn {
  color: #17304d;
  border-color: rgba(36, 71, 106, 0.12);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(241, 247, 255, 0.92));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.65), 0 18px 36px rgba(40, 71, 113, 0.12);
}

.mode-board.theme-board-light .option-key {
  border-color: rgba(36, 71, 106, 0.12);
  background: linear-gradient(180deg, rgba(228, 238, 255, 0.94), rgba(215, 230, 255, 0.9));
  color: #17304d;
}

.mode-board.theme-board-light .feedback-bar {
  color: #17304d;
}

.mode-board .results-title {
  font-size: clamp(2.3rem, 3vw, 3.2rem);
}

.mode-board .results-grid {
  gap: 18px;
}

.mode-board .result-stat {
  min-height: 150px;
}

.mode-board .keyboard-hint {
  display: none;
}

@media (max-width: 1400px) {
  body.student-app.mode-board {
    font-size: 17px;
  }

  .mode-board .top-nav,
  .mode-board .screen {
    width: min(calc(100% - 18px), 100%);
  }

  .mode-board .question-card {
    min-height: 0;
  }

  .mode-board .q-text,
  .mode-board #q-text,
  .mode-board #tp-q-text {
    font-size: clamp(1.9rem, 3.2vw, 3rem);
  }

  .mode-board .option-btn {
    min-height: 120px;
  }
}

@media (max-width: 1100px) {
  .mode-board .top-nav {
    padding: 14px 16px;
  }

  .mode-board .nav-center {
    display: none;
  }

  .mode-board .breadcrumb {
    max-width: 220px;
  }

  .mode-board .quiz-header {
    align-items: flex-start;
  }

  .mode-board .question-card {
    padding: 28px 24px;
  }

  .mode-board .timer-wrap,
  .mode-board #tp-full-timer-wrap {
    position: static;
    margin: 0 0 16px auto;
  }

  .mode-board .options-grid,
  .mode-board #options-grid,
  .mode-board #tp-options-grid {
    grid-template-columns: 1fr;
  }

  .mode-board .tf-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 800px) {
  .mode-board .tb-brand-text,
  .mode-board .nav-btn-label,
  .mode-board .breadcrumb {
    display: none;
  }

  .mode-board .board-zoom-value {
    min-width: 44px;
    font-size: 0.82rem;
  }

  .mode-board .top-nav {
    min-height: 74px;
    margin-top: 8px;
    border-radius: 20px;
  }

  .mode-board .nav-btn,
  .mode-board #btn-ui-mode {
    min-width: 48px;
    height: 48px;
    padding: 0 12px;
  }

  .mode-board .board-zoom-control {
    min-height: 48px;
    padding: 0 8px;
    gap: 6px;
  }

  .mode-board .board-zoom-btn {
    width: 30px;
    height: 30px;
  }

  .mode-board .screen {
    padding: 18px 12px 28px;
  }

  .mode-board .quiz-nav {
    width: 100%;
    justify-content: center;
  }

  .mode-board .nav-arrow,
  .mode-board .skip-btn,
  .mode-board .flag-btn,
  .mode-board .action-btn {
    min-height: 54px;
    padding: 0 18px;
  }
}

/* ════════════════════════════════════════
   ONBOARDING SCREEN
════════════════════════════════════════ */

.onboarding-screen {
  position: fixed;
  inset: 0;
  z-index: 9000;
  background: var(--bg1, #0d1117);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.onboarding-screen.hidden { display: none; }

/* Tall cards (Registration has many fields) must scroll on short windows
   instead of being cut off. `margin: auto` on the card keeps it centered when
   there is room, and unlike align-items:center it never clips the top. */
.onboarding-screen {
  overflow-y: auto;
  align-items: flex-start;
}
.onboarding-screen > .onboarding-card {
  margin: auto;
}

.onboarding-card {
  width: 100%;
  max-width: 420px;
  background: var(--card, #161b22);
  border: 1px solid var(--border, #30363d);
  border-radius: 18px;
  padding: 36px 28px 28px;
  box-shadow: 0 24px 64px rgba(0,0,0,0.4);
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.onboarding-logo {
  font-size: 2.8rem;
  text-align: center;
  line-height: 1;
}

.onboarding-title {
  font-size: 1.6rem;
  font-weight: 800;
  text-align: center;
  margin: 0;
  color: var(--text, #e6edf3);
}

.onboarding-sub {
  font-size: 0.88rem;
  color: var(--text2, #8b949e);
  text-align: center;
  margin: -8px 0 0;
}

.onboarding-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.onboarding-label {
  font-size: 0.83rem;
  font-weight: 700;
  color: var(--text2, #8b949e);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.ob-required { color: var(--wrong, #f85149); }

.onboarding-input {
  width: 100%;
  box-sizing: border-box;
  padding: 12px 14px;
  border: 1.5px solid var(--border, #30363d);
  border-radius: 10px;
  background: var(--bg2, #0d1117);
  color: var(--text, #e6edf3);
  font-size: 1rem;
  font-family: inherit;
  transition: border-color 0.15s;
}

.onboarding-input:focus {
  outline: none;
  border-color: var(--accent, #f0883e);
}

/* Show/hide toggle for PIN fields (login, registration, lock-screen) */
.pin-toggle-wrap {
  position: relative;
}
.pin-toggle-wrap .onboarding-input {
  padding-right: 44px;
}
/* pin-lock-input keeps its centered dot-spacing; the toggle just sits near
   the edge rather than shifting the (already short) centered text. */
.pin-toggle-wrap .pin-lock-input {
  padding-right: 36px;
}
.pin-toggle-btn {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  font-size: 1.1rem;
  line-height: 1;
  padding: 8px;
  cursor: pointer;
  opacity: 0.75;
}
.pin-toggle-btn:active {
  opacity: 1;
}

.onboarding-hint {
  font-size: 0.76rem;
  color: var(--text2, #8b949e);
  margin: 0;
  line-height: 1.5;
}

.onboarding-btn {
  width: 100%;
  padding: 14px;
  background: var(--accent, #f0883e);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: opacity 0.15s, transform 0.1s;
  margin-top: 4px;
}

.onboarding-btn:hover  { opacity: 0.9; }
.onboarding-btn:active { transform: scale(0.98); }

.onboarding-skip {
  background: none;
  border: none;
  color: var(--text2, #8b949e);
  font-size: 0.82rem;
  cursor: pointer;
  text-align: center;
  text-decoration: underline;
  padding: 4px;
  margin-top: -8px;
}

.onboarding-skip:hover { color: var(--text, #e6edf3); }

.ob-change-link {
  background: none;
  border: none;
  padding: 0;
  font-size: 0.78rem;
  color: var(--accent, #58a6ff);
  cursor: pointer;
  margin-top: 4px;
  text-decoration: underline;
}

.onboarding-input.ob-error {
  border-color: var(--wrong, #f85149);
  animation: ob-shake 0.3s ease;
}

@keyframes ob-shake {
  0%,100% { transform: translateX(0); }
  25%      { transform: translateX(-6px); }
  75%      { transform: translateX(6px); }
}

/* ══════════════════════════════════════════════════════════
   ADMIT-CARD THEME — registration / plan-select / payment
   Ink-navy + gold "admit card" motif. Scoped to .admit-theme
   so the rest of the app keeps its existing look untouched.
══════════════════════════════════════════════════════════ */

.admit-theme {
  --ink-1: #0B1830; --ink-2: #14264A; --ink-3: #1B3160;
  --gold-1: #B8863A; --gold-2: #E7C165; --gold-3: #F6E3A6;
  --gold-grad: linear-gradient(90deg, var(--gold-1), var(--gold-2) 40%, var(--gold-3) 55%, var(--gold-2) 70%, var(--gold-1));
  --ink-grad: linear-gradient(150deg, var(--ink-1) 0%, var(--ink-2) 60%, var(--ink-3) 100%);
  --admit-emerald: #2AAE82;
}

.admit-theme .onboarding-card {
  padding: 0 !important;
  overflow: hidden;
  gap: 0 !important;
  max-width: 420px !important;
}
.admit-theme .onboarding-card.hidden { display: none; }

.admit-head {
  background: var(--ink-grad);
  padding: 22px 24px;
  display: flex;
  align-items: center;
  gap: 14px;
  position: relative;
  overflow: hidden;
}
.admit-head::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 88% -10%, rgba(231,193,101,0.28), transparent 55%);
}
.admit-seal {
  position: relative;
  width: 50px; height: 50px;
  border-radius: 50%;
  background: var(--gold-grad);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 3px 10px rgba(184,134,58,0.45), inset 0 1px 2px rgba(255,255,255,0.6);
}
.admit-seal-inner {
  width: 40px; height: 40px;
  border-radius: 50%;
  border: 1.5px dashed rgba(11,24,48,0.4);
  display: flex; align-items: center; justify-content: center;
  text-align: center; line-height: 1.05;
  font-family: 'Fraunces', 'Baloo 2', serif;
  font-weight: 800; font-size: 9px; color: #0B1830; letter-spacing: 0.3px;
}
.admit-eyebrow {
  position: relative;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px; letter-spacing: 1.5px; text-transform: uppercase;
  color: var(--gold-3);
  margin-bottom: 4px;
}
.admit-head .onboarding-title {
  position: relative;
  font-family: 'Fraunces', 'Baloo 2', serif;
  font-size: 1.35rem; text-align: left; color: #fff; margin: 0;
}
.admit-head .onboarding-sub {
  position: relative;
  text-align: left; margin: 5px 0 0; color: #B9C6DE;
}

.admit-perforation {
  display: flex; gap: 6px; align-items: center;
  padding: 10px 20px; overflow: hidden;
  background: var(--card, #161b22);
}
.admit-perforation::before { content: ''; display: block; width: 0; }
.admit-perforation {
  background-image: radial-gradient(circle, var(--bg1, #0d1117) 2.2px, transparent 2.6px);
  background-size: 13px 100%;
  background-position: 0 center;
  background-repeat: repeat-x;
  border-bottom: 1px dashed var(--border, #30363d);
  height: 16px;
}

.admit-body {
  padding: 22px 24px 26px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.admit-body .onboarding-field { gap: 6px; }

.admit-theme .onboarding-btn {
  background: var(--gold-grad) !important;
  color: #2A1F06 !important;
  font-family: 'Work Sans', 'Baloo 2', sans-serif;
  font-weight: 800 !important;
  box-shadow: 0 10px 22px -8px rgba(184,134,58,0.55) !important;
}
.admit-theme .onboarding-btn:hover { opacity: 1 !important; filter: brightness(1.04) !important; }

.admit-theme .onboarding-input:focus {
  border-color: var(--gold-1) !important;
  box-shadow: 0 0 0 3px rgba(184,134,58,0.18) !important;
}

.admit-theme .ob-role-tab.active {
  background: var(--gold-grad) !important;
  color: #2A1F06 !important;
}

.admit-head .onboarding-title {
  background: none !important;
  -webkit-text-fill-color: #fff !important;
  color: #fff !important;
}

.admit-success-box {
  border: 1px solid var(--admit-emerald);
  background: rgba(42,174,130,0.1);
  border-radius: 14px;
  padding: 18px;
  text-align: center;
}
.admit-success-icon { font-size: 26px; margin-bottom: 4px; }
.admit-success-label {
  font-family: 'Work Sans', 'Baloo 2', sans-serif; font-size: 12.5px; font-weight: 600;
  color: var(--text2, #8b949e);
}
.admit-code-chip {
  display: inline-flex; align-items: center; gap: 8px; margin: 6px 0 2px;
  font-family: 'JetBrains Mono', monospace; font-size: 19px; font-weight: 700;
  letter-spacing: 1.2px; color: var(--text, #e6edf3);
  background: var(--bg2, #0d1117);
  border: 1.5px dashed var(--gold-1); border-radius: 10px; padding: 7px 14px;
}
.admit-success-note { font-size: 12px; color: var(--text2, #8b949e); margin-top: 8px; line-height: 1.6; }

/* batch cards (replaces the plan-select <select> dropdown) */
.admit-slides-hint {
  font-family: 'JetBrains Mono', monospace; font-size: 10px; letter-spacing: 1px;
  color: var(--text2, #8b949e); text-transform: uppercase; text-align: right; margin: 0 0 8px;
}
/* Board/Medium search filter above the batch carousel — see payment.js's
   openPlanSelect. Only rendered when there's more than one distinct value
   to filter by, so this stays invisible for a small/single-board catalog. */
.admit-filter-row {
  display: flex; gap: 8px; margin: 0 0 10px;
}
.admit-filter-select {
  flex: 1 1 0; min-width: 0;
  padding: 9px 10px;
  border: 1.5px solid var(--border, #30363d);
  border-radius: 9px;
  background: var(--bg2, #0d1117);
  color: var(--text, #e6edf3);
  font-size: 0.82rem;
  font-family: inherit;
}
.admit-batch-slides {
  display: flex; gap: 12px; overflow-x: auto; scroll-snap-type: x mandatory;
  padding: 4px 4px 12px; margin: 0 -4px 4px; -webkit-overflow-scrolling: touch;
}
.admit-batch-slides::-webkit-scrollbar { height: 5px; }
.admit-batch-slides::-webkit-scrollbar-thumb { background: var(--border, #30363d); border-radius: 3px; }
.admit-batch-slide {
  scroll-snap-align: start; flex: 0 0 auto; width: 148px; cursor: pointer;
  border: 1.5px solid var(--border, #30363d); border-radius: 14px;
  background: var(--card, #161b22);
  padding: 12px 12px 10px; position: relative;
  transition: border-color .15s, box-shadow .15s;
}
.admit-batch-slide .admit-slide-cover {
  width: 100%; aspect-ratio: 16/9; border-radius: 9px; margin-bottom: 9px;
  background: var(--ink-grad);
  display: flex; align-items: center; justify-content: center; font-size: 20px;
  position: relative; overflow: hidden;
}
.admit-batch-slide .admit-slide-cover img { width: 100%; height: 100%; object-fit: cover; }
.admit-batch-slide .admit-slide-cover::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at 85% -10%, rgba(231,193,101,0.35), transparent 55%);
}
.admit-batch-slide .admit-slide-name {
  font-family: 'Work Sans', 'Baloo 2', sans-serif; font-weight: 700; font-size: 12px;
  color: var(--text, #e6edf3); line-height: 1.35;
}
.admit-batch-slide .admit-slide-dot {
  position: absolute; top: 9px; right: 9px; width: 17px; height: 17px; border-radius: 50%;
  border: 1.5px solid rgba(255,255,255,0.6); background: rgba(11,24,48,0.25);
}
.admit-batch-slide.active {
  border-color: var(--gold-1);
  box-shadow: 0 0 0 1px var(--gold-1), 0 10px 20px -10px rgba(184,134,58,0.5);
}
.admit-batch-slide.active .admit-slide-dot {
  background: var(--gold-grad); border-color: transparent;
  display: flex; align-items: center; justify-content: center;
}
.admit-batch-slide.active .admit-slide-dot::after {
  content: '✓'; font-size: 10px; color: #2A1F06; font-weight: 800;
}

.admit-ledger-row {
  display: flex; justify-content: space-between; align-items: baseline;
  padding: 10px 0; border-bottom: 1px dashed var(--border, #30363d);
  font-family: 'Work Sans', 'Baloo 2', sans-serif; font-size: 13px;
}
.admit-ledger-row:last-child { border-bottom: none; }
.admit-ledger-row .l { color: var(--text2, #8b949e); font-weight: 500; }
.admit-ledger-row .v { font-family: 'JetBrains Mono', monospace; font-weight: 700; color: var(--text, #e6edf3); }

.admit-gold-rule { height: 2px; margin: 16px 0; border-radius: 2px; background: var(--gold-grad); }

.admit-plan-btn {
  width: 100%; display: flex; align-items: center; justify-content: space-between;
  padding: 13px 15px; border-radius: 12px; border: 1.5px solid var(--border, #30363d);
  background: var(--card, #161b22); cursor: pointer; margin-bottom: 9px;
  font-family: 'Work Sans', 'Baloo 2', sans-serif; text-align: left;
}
.admit-plan-btn .admit-plan-name { font-weight: 700; font-size: 13px; color: var(--text, #e6edf3); display: flex; align-items: center; gap: 8px; }
.admit-plan-btn .admit-plan-price { font-family: 'JetBrains Mono', monospace; font-weight: 700; font-size: 13.5px; color: var(--text, #e6edf3); }
.admit-plan-btn.trial { border-color: var(--admit-emerald); background: rgba(42,174,130,0.08); }
.admit-plan-btn.trial .admit-plan-price { color: var(--admit-emerald); }
.admit-plan-btn.featured { border-color: var(--gold-1); box-shadow: 0 0 0 1px var(--gold-1); }
.admit-plan-badge {
  font-family: 'JetBrains Mono', monospace; font-size: 9px; font-weight: 700; letter-spacing: 1px;
  background: var(--gold-grad); color: #3A2B08; padding: 2px 7px; border-radius: 8px; text-transform: uppercase;
}

/* YouTube-subscriber discount block (self-claim + teacher approval) */
.admit-plan-price-orig { opacity: 0.55; font-weight: 500; margin-right: 4px; }
.admit-plan-discount-note { margin: 8px 2px 0; font-size: .8rem; line-height: 1.35; opacity: .85; }
.admit-plan-discount-badge {
  display: inline-block; margin-left: 6px; font-family: 'JetBrains Mono', monospace;
  font-size: 9px; font-weight: 700; letter-spacing: .5px; text-transform: uppercase;
  background: rgba(42,174,130,0.15); color: var(--admit-emerald, #2aae82);
  padding: 2px 6px; border-radius: 7px;
}
#pay-yt-discount { margin-top: 14px; }
.admit-yt-claim-btn {
  width: 100%; padding: 11px 14px; border-radius: 12px;
  border: 1.5px dashed var(--gold-1, #d4a94a); background: rgba(212,169,74,0.08);
  color: var(--text, #e6edf3); font-family: 'Work Sans', 'Baloo 2', sans-serif;
  font-weight: 700; font-size: 12.5px; cursor: pointer; text-align: center;
}
.admit-yt-verified {
  padding: 10px 14px; border-radius: 12px; background: rgba(42,174,130,0.1);
  border: 1px solid var(--admit-emerald, #2aae82); color: var(--admit-emerald, #2aae82);
  font-family: 'Work Sans', 'Baloo 2', sans-serif; font-weight: 700; font-size: 12.5px; text-align: center;
}
.admit-yt-pending {
  padding: 10px 14px; border-radius: 12px; background: rgba(212,169,74,0.08);
  border: 1px solid var(--gold-1, #d4a94a); color: var(--text2, #8b949e);
  font-family: 'Work Sans', 'Baloo 2', sans-serif; font-size: 12px; text-align: center; line-height: 1.5;
}
.admit-yt-panel {
  border: 1px solid var(--border, #30363d); border-radius: 12px; padding: 12px;
  background: var(--card, #161b22); font-family: 'Work Sans', 'Baloo 2', sans-serif;
}
.admit-yt-panel-title { font-size: 12.5px; font-weight: 700; color: var(--text, #e6edf3); margin: 0 0 8px; }
.admit-yt-search { margin-bottom: 6px; }
.admit-yt-results { max-height: 160px; overflow-y: auto; margin-bottom: 4px; }
.admit-yt-result {
  padding: 9px 10px; border-radius: 8px; font-size: 12.5px; color: var(--text, #e6edf3);
  cursor: pointer; border: 1px solid transparent;
}
.admit-yt-result:hover { background: rgba(212,169,74,0.08); border-color: var(--gold-1, #d4a94a); }
.admit-yt-result-empty { padding: 9px 10px; font-size: 12px; color: var(--text2, #8b949e); }
.admit-yt-selected { margin-top: 8px; }
.admit-yt-selected.hidden { display: none; }
.admit-yt-selected p { font-size: 12.5px; font-weight: 600; color: var(--text, #e6edf3); margin: 0 0 8px; }
.admit-yt-selected input { margin-bottom: 8px; }
.admit-yt-cancel {
  width: 100%; margin-top: 8px; padding: 8px; border-radius: 10px; border: none;
  background: transparent; color: var(--text2, #8b949e); font-size: 12px;
  font-family: 'Work Sans', 'Baloo 2', sans-serif; cursor: pointer; text-decoration: underline;
}

/* ══════════════════════════════════════════════════
   MOBILE UX — Student App Targeted Fixes
   ≤ 600px only. Desktop + Board mode unchanged.
══════════════════════════════════════════════════ */
@media (max-width: 600px) {

  /* ── 1. NAV CLEANUP — hide non-essential buttons ── */

  /* Board Zoom controls — hide on mobile (zoom managed via pinch) */
  #board-zoom-control { display: none; }

  /* Admin button — students don't need to open admin */
  #btn-admin          { display: none; }

  /* Language — rarely changed mid-session, saves nav space */
  #btn-lang           { display: none; }

  /* ── 2. NAV BUTTONS — better touch targets ─────── */

  .nav-btn {
    min-width: 44px;
    min-height: 44px;
    font-size: 1.05rem;
    -webkit-tap-highlight-color: transparent;
  }

  /* ── 3. NAV CENTER SCORE — hide to prevent overlap ─ */

  /* Score shows in quiz screen directly; hiding here
     prevents left/right nav from squeezing on small screens */
  .nav-center { display: none; }

  /* ── 4. QUIZ NAV — safe area for notch phones ──── */

  .quiz-nav {
    padding-bottom: env(safe-area-inset-bottom, 0px);
    margin-bottom: max(8px, env(safe-area-inset-bottom, 0px));
  }

  /* ── 5. BODY SAFE AREA ──────────────────────────── */

  body.student-app {
    padding-bottom: env(safe-area-inset-bottom, 0px);
  }

  /* ── 6. TAP HIGHLIGHT OFF ───────────────────────── */

  * { -webkit-tap-highlight-color: transparent; }
}

/* ════════════════════════════════════════════════════
   PREMIUM STUDENT UI ENHANCEMENTS
   All existing classes preserved. New styles added
   after existing ones — cascade wins correctly.
════════════════════════════════════════════════════ */

/* ── Server URL field — always hidden ─────────────
   URL is auto-configured from Render backend.
   Students don't need to see or change it.        */
#ob-server-field { display: none !important; }

/* ── WhatsApp Help button ──────────────────────── */
.ob-whatsapp-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 11px 16px;
  border-radius: 10px;
  background: #25D366;
  color: #fff;
  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: none;
  margin-top: 4px;
  transition: opacity 0.15s, transform 0.1s;
  -webkit-tap-highlight-color: transparent;
}
.ob-whatsapp-btn:active { opacity: 0.88; transform: scale(0.98); }

/* ════════════════════════════════════════
   ONBOARDING — Premium redesign
════════════════════════════════════════ */
.onboarding-screen {
  background:
    radial-gradient(ellipse 80% 60% at 20% 10%, rgba(var(--accent-rgb), 0.1), transparent),
    radial-gradient(ellipse 60% 50% at 80% 90%, rgba(var(--correct-rgb), 0.07), transparent),
    var(--bg) !important;
  padding: var(--sp-4) !important;
}

.onboarding-card {
  border-radius: var(--r-xl) !important;
  padding: var(--sp-10) var(--sp-8) var(--sp-8) !important;
  gap: var(--sp-4) !important;
  box-shadow: var(--elev-3) !important;
  border: 1px solid var(--border) !important;
  background: var(--surface) !important;
  max-width: 400px !important;
}

.onboarding-logo { font-size: 3.5rem !important; margin-bottom: var(--sp-1); }

.onboarding-title {
  font-size: var(--text-3xl) !important;
  font-weight: 800 !important;
  background: var(--grad-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.onboarding-input {
  padding: var(--sp-3) var(--sp-4) !important;
  border-radius: var(--r-md) !important;
  min-height: 48px !important;
  font-size: 1rem !important;
  background: var(--input-bg, var(--bg2)) !important;
  border: 1.5px solid var(--input-border, var(--border)) !important;
  color: var(--text) !important;
  transition: border-color var(--ease-std), box-shadow var(--ease-std) !important;
}
.onboarding-input:focus {
  border-color: var(--accent) !important;
  box-shadow: var(--glow) !important;
}

.onboarding-btn {
  border-radius: var(--r-md) !important;
  min-height: 52px !important;
  font-size: var(--text-lg) !important;
  font-weight: 800 !important;
  background: var(--accent) !important;
  box-shadow: 0 4px 16px rgba(var(--accent-rgb), 0.4) !important;
  transition: filter var(--ease-fast), transform var(--ease-fast) !important;
}
.onboarding-btn:hover  { filter: brightness(1.1) !important; opacity: 1 !important; }
.onboarding-btn:active { transform: scale(0.97) !important; }

/* ════════════════════════════════════════
   TOP NAVIGATION — Premium glassmorphism
════════════════════════════════════════ */
.top-nav {
  /* backdrop-filter removed — always-on (fixed, always visible) blur forces
     continuous GPU recompositing on Android WebView on every scroll/tap,
     which was a major contributor to the app feeling slow to respond. */
  background: var(--topbar-bg, rgba(22,27,34,0.98)) !important;
  border-bottom: 1px solid var(--topbar-border, var(--border));
  box-shadow: 0 1px 0 var(--border), var(--elev-1) !important;
}

.nav-btn {
  border-radius: var(--r-md) !important;
  transition: background var(--ease-fast), transform var(--ease-fast) !important;
}
.nav-btn:hover { transform: none !important; background: var(--surface2) !important; }

/* Profile button — accent pill */
#btn-profile {
  background: var(--tag-bg) !important;
  border: 1px solid var(--tag-border) !important;
  color: var(--accent) !important;
  font-weight: 700 !important;
  border-radius: var(--r-pill) !important;
  padding: 0 var(--sp-3) !important;
  min-width: 80px !important;
}

/* Live score chips — compact */
.session-score { gap: var(--sp-2) !important; }
.score-item {
  border-radius: var(--r-pill) !important;
  font-weight: 700 !important;
  font-family: var(--font-mono) !important;
  font-size: var(--text-sm) !important;
}

/* ════════════════════════════════════════
   HOME SCREEN — Premium cards & layout
════════════════════════════════════════ */
/* Home Banners — admin-managed promo carousel (per-batch or all-batches,
   see bannerController.js). Auto ping-pong scroll (app.js's
   _renderHomeBanners/_startBannerAutoplay): advances forward, reverses at
   the last slide, loops — student can also swipe/drag either direction,
   which pauses autoplay briefly. Entirely hidden (.hidden, see css/style.css)
   when the student has zero banners (see app.js's _buildDefaultBanners —
   a rotating set of built-in study-quotes fills that gap instead, so this
   is now effectively always visible). Now the first thing on Home (replaces
   the old static "Select Class & Subject" hero text) — taller + bigger
   title than its original promo-strip size, so it still reads as a header. */
.home-banners {
  position: relative;
  height: 170px;
  margin: var(--sp-4) var(--sp-4) var(--sp-4);
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--elev-1);
  touch-action: pan-y;
}
.home-banners-track {
  display: flex;
  height: 100%;
  transition: transform 0.5s cubic-bezier(.65,0,.35,1);
  will-change: transform;
}
.home-banner {
  min-width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 22px 26px;
  position: relative;
  overflow: hidden;
  cursor: pointer;
  color: #fff;
  background-size: cover;
  background-position: center;
}
.home-banner::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(120% 140% at 100% 0%, rgba(255,255,255,0.18), transparent 55%);
  pointer-events: none;
}
/* Cyclic fallback gradients (assigned by index in app.js) — used as the base
   `background`; a banner with an imageUrl gets an inline background-image on
   top, which the browser prioritizes over this shorthand automatically. */
.home-banner.hb-g0 { background: linear-gradient(120deg, #1473ff, #16b8ff); }
.home-banner.hb-g1 { background: linear-gradient(120deg, #ff7a45, #ffb020); }
.home-banner.hb-g2 { background: linear-gradient(120deg, #7c4dff, #c04dff); }
.home-banner.hb-g3 { background: linear-gradient(120deg, #0fae7a, #39d98a); }
.home-banner-title {
  font-family: var(--font-display, inherit);
  font-weight: 800;
  font-size: 1.35rem;
  line-height: 1.25;
  text-wrap: balance;
  margin-bottom: 5px;
  text-shadow: 0 1px 4px rgba(0,0,0,0.25);
}
.home-banner-subtitle {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.9);
  text-shadow: 0 1px 4px rgba(0,0,0,0.25);
}
.home-banners-dots {
  position: absolute;
  bottom: 9px;
  left: 0;
  right: 0;
  display: flex;
  justify-content: center;
  gap: 5px;
  pointer-events: none;
}
.home-banner-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(255,255,255,0.4);
  transition: all 0.35s;
}
.home-banner-dot.active {
  width: 16px;
  border-radius: 3px;
  background: #fff;
}

@media (prefers-reduced-motion: reduce) {
  .home-banners-track { transition: none; }
}

/* Share App — see app.js's _shareApp(). A student-growth feature: lets a
   student invite friends via the phone's own native Share sheet. */
.home-share-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: calc(100% - var(--sp-4) * 2);
  margin: 0 var(--sp-4) var(--sp-4);
  padding: 12px;
  border: 1.5px solid rgba(var(--accent-rgb), 0.35);
  border-radius: var(--r-lg);
  background: rgba(var(--accent-rgb), 0.08);
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}
.home-share-btn:hover,
.home-share-btn:focus-visible {
  background: rgba(var(--accent-rgb), 0.16);
  border-color: var(--accent);
}

/* Home search — Notes concepts + Exercise questions together (homeSearch.js) */
.home-search-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 var(--sp-4) var(--sp-4);
  padding: 0 12px;
  height: 46px;
  border: 1.5px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--surface);
  box-shadow: var(--elev-1);
  transition: border-color var(--ease-std);
}
.home-search-bar:focus-within { border-color: var(--accent); }
.home-search-icon { font-size: 1rem; flex-shrink: 0; color: var(--text2, #8b949e); }
.home-search-input {
  flex: 1;
  height: 100%;
  border: 0;
  background: transparent;
  color: var(--text, #e6edf3);
  font-size: 0.9rem;
  outline: none;
}
.home-search-input::placeholder { color: var(--text2, #8b949e); }
.home-search-clear-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border: 0;
  border-radius: 50%;
  background: var(--border);
  color: var(--text2, #8b949e);
  font-size: 0.75rem;
  cursor: pointer;
  flex-shrink: 0;
}

.home-search-results {
  margin: -8px var(--sp-4) var(--sp-4);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--surface);
  box-shadow: var(--elev-1);
  overflow: hidden;
}
.home-search-group-label {
  padding: 8px 14px 4px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text2, #8b949e);
}
.home-search-result {
  display: block;
  width: 100%;
  text-align: left;
  padding: 10px 14px;
  border: 0;
  border-top: 1px solid var(--border);
  background: transparent;
  cursor: pointer;
  font-family: inherit;
}
.home-search-group-label + .home-search-result { border-top: 0; }
.home-search-result:active { background: rgba(var(--accent-rgb), 0.08); }
.home-search-result-title { font-size: 0.86rem; color: var(--text, #e6edf3); line-height: 1.4; }
.home-search-result-meta { font-size: 0.74rem; color: var(--text2, #8b949e); margin-top: 3px; }
.home-search-loading,
.home-search-empty {
  padding: 16px 14px;
  font-size: 0.84rem;
  color: var(--text2, #8b949e);
  text-align: center;
}

/* Stat cards — elevated */
.stat-card {
  border-radius: var(--r-lg) !important;
  border: 1px solid var(--border) !important;
  background: var(--surface) !important;
  box-shadow: var(--elev-1) !important;
  transition: transform var(--ease-std), box-shadow var(--ease-std) !important;
}
.stat-card:hover {
  transform: translateY(-2px) !important;
  box-shadow: var(--elev-2) !important;
}

/* Batch cards — colorful, premium */
.batch-card {
  border-radius: var(--r-lg) !important;
  border: 1px solid var(--border) !important;
  background: var(--surface) !important;
  box-shadow: var(--elev-1) !important;
  transition: transform var(--ease-std), border-color var(--ease-std), box-shadow var(--ease-std) !important;
  cursor: pointer !important;
}
.batch-card:hover {
  transform: translateY(-3px) !important;
  border-color: var(--accent) !important;
  box-shadow: var(--elev-2) !important;
}

/* Subject cards — pill accent header */
.subject-card {
  border-radius: var(--r-lg) !important;
  border: 1px solid var(--border) !important;
  background: var(--surface) !important;
  transition: transform var(--ease-std), border-color var(--ease-std) !important;
  overflow: hidden !important;
}
.subject-card:hover {
  transform: translateY(-2px) !important;
  border-color: var(--accent) !important;
}

/* Chapter items — progress bar on each */
.chapter-item {
  border-radius: var(--r-md) !important;
  border: 1px solid var(--border) !important;
  background: var(--surface) !important;
  transition: border-color var(--ease-fast), background var(--ease-fast) !important;
}
.chapter-item:hover { border-color: var(--accent) !important; }

/* Section labels */
.section-label {
  font-weight: 700 !important;
  letter-spacing: 0.06em !important;
  text-transform: uppercase !important;
  font-size: var(--text-sm) !important;
  color: var(--text2) !important;
}

/* Lesson cards */
.lesson-card {
  border-radius: var(--r-md) !important;
  border: 1px solid var(--border) !important;
  background: var(--surface) !important;
  transition: border-color var(--ease-fast) !important;
}
.lesson-card:hover { border-color: var(--accent) !important; }

/* Test cards (published quizzes on home) */
.test-card {
  border-radius: var(--r-lg) !important;
  border: 1px solid var(--border) !important;
  background: var(--surface) !important;
  box-shadow: var(--elev-1) !important;
  transition: transform var(--ease-std), box-shadow var(--ease-std), border-color var(--ease-std) !important;
}
.test-card:hover {
  transform: translateY(-2px) !important;
  border-color: var(--accent) !important;
  box-shadow: var(--elev-2) !important;
}

/* ════════════════════════════════════════
   QUIZ SCREEN — Premium question card
════════════════════════════════════════ */
.question-card {
  border-radius: var(--r-xl) !important;
  border: 1px solid var(--border) !important;
  background: var(--surface) !important;
  box-shadow: var(--elev-2) !important;
}

/* Options — bigger touch targets */
.option-btn {
  border-radius: var(--r-lg) !important;
  min-height: 60px !important;
  transition: border-color var(--ease-fast), background var(--ease-fast), box-shadow var(--ease-fast), transform var(--ease-fast) !important;
}
.option-btn:hover:not(:disabled) {
  transform: translateY(-1px) !important;
  box-shadow: var(--elev-2) !important;
}
.option-btn.selected { border-color: var(--accent) !important; }

/* Option key circle */
.option-key {
  border-radius: 50% !important;
  font-weight: 800 !important;
  font-family: var(--font-mono) !important;
  background: var(--bg2) !important;
  border: 1px solid var(--border) !important;
}
.option-btn.selected .option-key { background: var(--accent) !important; color: #fff !important; border-color: var(--accent) !important; }
.option-btn.correct .option-key  { background: var(--correct) !important; color: #fff !important; border-color: var(--correct) !important; }
.option-btn.wrong .option-key    { background: var(--wrong) !important;   color: #fff !important; border-color: var(--wrong) !important; }

/* Progress bar */
.progress-bar { border-radius: var(--r-pill) !important; }
.progress-fill {
  border-radius: var(--r-pill) !important;
  background: var(--grad-accent) !important;
  transition: width 0.4s ease !important;
}

/* Quiz header */
.quiz-header {
  border-radius: var(--r-xl) !important;
  background: var(--surface) !important;
  border: 1px solid var(--border) !important;
  box-shadow: var(--elev-1) !important;
}

/* Feedback bar */
.feedback-bar {
  border-radius: var(--r-lg) !important;
  font-weight: 700 !important;
}

/* Solution / explanation shown under the feedback bar once a question is
   answered — admin-entered via Quiz Builder's manual add / bulk paste. */
.feedback-solution {
  margin: -8px 0 14px;
  padding: 10px 16px;
  border-radius: var(--r-lg, 10px);
  background: rgba(255, 193, 7, 0.12);
  border: 1px solid rgba(255, 193, 7, 0.35);
  font-size: 0.85rem;
  line-height: 1.45;
  color: var(--text, inherit);
}

/* Quiz nav */
.quiz-nav {
  /* backdrop-filter removed — this bar stays on screen through the whole
     quiz (the most tap-heavy part of the app), so a live blur here caused
     the most noticeable per-tap jank. */
  border-radius: var(--r-xl) !important;
  background: var(--glass-bg-solid, rgba(22,27,34,0.96)) !important;
  border: 1px solid var(--glass-border) !important;
  box-shadow: var(--elev-3) !important;
}

.nav-arrow {
  border-radius: var(--r-md) !important;
  font-weight: 700 !important;
}
.nav-arrow:disabled { opacity: 0.35 !important; }

/* TF buttons */
.tf-btn {
  border-radius: var(--r-lg) !important;
  font-size: var(--text-xl) !important;
  font-weight: 800 !important;
  min-height: 64px !important;
  transition: border-color var(--ease-fast), background var(--ease-fast), transform var(--ease-fast) !important;
}
.tf-btn:hover:not(:disabled) { transform: translateY(-1px) !important; }

/* Difficulty badges */
.diff-badge {
  border-radius: var(--r-pill) !important;
  font-weight: 700 !important;
  font-size: var(--text-xs) !important;
  padding: 3px 10px !important;
}
.diff-badge.easy   { background: var(--badge-active-bg) !important; color: var(--correct) !important; }
.diff-badge.medium { background: var(--badge-pending-bg) !important; color: var(--accent2) !important; }
.diff-badge.hard   { background: var(--badge-blocked-bg) !important; color: var(--wrong) !important; }

/* ════════════════════════════════════════
   RESULTS SCREEN — Premium
════════════════════════════════════════ */
.results-card {
  border-radius: var(--r-2xl) !important;
  background: var(--surface) !important;
  border: 1px solid var(--border) !important;
  box-shadow: var(--elev-3) !important;
}

.results-emoji {
  font-size: 4rem !important;
  animation: resultsBounce 0.8s var(--ease-bounce) !important;
}

.results-title {
  font-weight: 800 !important;
  letter-spacing: -0.01em !important;
}

.result-stat {
  border-radius: var(--r-lg) !important;
  border: 1px solid var(--border) !important;
  background: var(--surface) !important;
  box-shadow: var(--elev-1) !important;
}

.score-bar-wrap { border-radius: var(--r-md) !important; overflow: hidden !important; }
.score-bar {
  border-radius: var(--r-md) !important;
  background: var(--grad-accent) !important;
  transition: width 1s ease !important;
}

/* Results action buttons */
.action-btn {
  border-radius: var(--r-md) !important;
  font-weight: 700 !important;
  min-height: 48px !important;
  transition: transform var(--ease-fast), box-shadow var(--ease-fast) !important;
}
.action-btn:hover { transform: translateY(-1px) !important; }

/* ════════════════════════════════════════
   ANALYTICS — Premium cards
════════════════════════════════════════ */
.analytics-root { background: var(--bg) !important; }

.an-header { border-bottom: 1px solid var(--border) !important; }

/* Analytics tab pills */
.an-tabs {
  display: flex !important;
  gap: var(--sp-2) !important;
  overflow-x: auto !important;
  padding: var(--sp-2) 0 !important;
  scrollbar-width: none !important;
}
.an-tabs::-webkit-scrollbar { display: none !important; }

.an-tab {
  border-radius: var(--r-pill) !important;
  padding: var(--sp-2) var(--sp-4) !important;
  font-weight: 600 !important;
  white-space: nowrap !important;
  border: 1px solid var(--border) !important;
  background: var(--surface) !important;
  color: var(--text2) !important;
  cursor: pointer !important;
  transition: background var(--ease-fast), color var(--ease-fast), border-color var(--ease-fast) !important;
}
.an-tab.active {
  background: var(--tag-bg) !important;
  border-color: var(--tag-border) !important;
  color: var(--accent) !important;
}

/* Analytics KPI cards */
.an-stat-card, .an-kpi-card {
  border-radius: var(--r-lg) !important;
  background: var(--surface) !important;
  border: 1px solid var(--border) !important;
  box-shadow: var(--elev-1) !important;
}

/* Weak question rows */
.an-weak-row {
  border-radius: var(--r-md) !important;
  background: var(--surface) !important;
  border: 1px solid var(--border) !important;
  transition: border-color var(--ease-fast) !important;
}
.an-weak-row:hover { border-color: var(--accent) !important; }

/* History items */
.an-hist-row {
  border-radius: var(--r-md) !important;
  background: var(--surface) !important;
  border: 1px solid var(--border) !important;
}

/* ════════════════════════════════════════
   TEST PLAYER — Premium
════════════════════════════════════════ */
.tp-marks-badge {
  border-radius: var(--r-pill) !important;
  font-weight: 800 !important;
  font-family: var(--font-mono) !important;
}

.tp-live-score {
  border-radius: var(--r-pill) !important;
  font-weight: 700 !important;
  font-family: var(--font-mono) !important;
}

/* ════════════════════════════════════════
   LIGHT THEME — student app overrides
════════════════════════════════════════ */
.theme-light .onboarding-card   { background: #fff !important; }
.theme-light .top-nav           { background: rgba(255,255,255,0.92) !important; box-shadow: 0 1px 0 #e6e9ed, 0 2px 8px rgba(0,0,0,0.06) !important; }
.theme-light .question-card     { background: #fff !important; border-color: #e6e9ed !important; }
.theme-light .option-btn        { background: #fff !important; border-color: #d0d7de !important; }
.theme-light .option-btn:hover:not(:disabled) { border-color: var(--accent) !important; background: #fff9f5 !important; }
.theme-light .option-key        { background: #f0f2f5 !important; border-color: #d0d7de !important; }
.theme-light .quiz-nav          { background: rgba(255,255,255,0.9) !important; border-color: #e6e9ed !important; }
.theme-light .stat-card,
.theme-light .batch-card,
.theme-light .subject-card,
.theme-light .chapter-item,
.theme-light .lesson-card,
.theme-light .test-card         { background: #fff !important; border-color: #e6e9ed !important; }
.theme-light .results-card      { background: #fff !important; border-color: #e6e9ed !important; }
.theme-light .quiz-header       { background: #fff !important; border-color: #e6e9ed !important; }

/* ════════════════════════════════════════
   HISTORY / ATTEMPT LIST — Home screen
════════════════════════════════════════ */
.history-item {
  border-radius: var(--r-md) !important;
  background: var(--surface) !important;
  border: 1px solid var(--border) !important;
  transition: border-color var(--ease-fast) !important;
}
.history-item:hover { border-color: var(--accent) !important; }

/* ════════════════════════════════════════
   SCROLLBAR — student app
════════════════════════════════════════ */
.screens-wrap::-webkit-scrollbar { width: 5px; }
.screens-wrap::-webkit-scrollbar-track { background: transparent; }
.screens-wrap::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* ════════════════════════════════════════
   PIN LOCK SCREEN
════════════════════════════════════════ */
.pin-lock-screen {
  position: fixed; inset: 0; z-index: 9998;
  background: var(--bg, #fff);
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
}
.pin-lock-screen.hidden { display: none; }
.pin-lock-card {
  display: flex; flex-direction: column; align-items: center; gap: 12px;
  width: 100%; max-width: 320px;
  padding: 32px 24px; border-radius: 20px;
  background: var(--surface, #f8f8f8);
  box-shadow: 0 8px 32px rgba(0,0,0,0.12);
  animation: splashFadeIn 0.3s ease;
}
.pin-lock-avatar {
  width: 72px; height: 72px; border-radius: 50%;
  background: var(--accent, #e74c3c);
  display: flex; align-items: center; justify-content: center;
  font-size: 2rem;
}
.pin-lock-name {
  font-size: 1.2rem; font-weight: 700;
  color: var(--text, #111);
}
.pin-lock-sub { font-size: 0.85rem; color: var(--text2, #666); }
.pin-lock-input {
  width: 100%; padding: 14px 16px; font-size: 1.4rem;
  text-align: center; letter-spacing: 8px;
  border: 2px solid var(--border, #ddd); border-radius: 12px;
  background: var(--bg, #fff); color: var(--text, #111);
  outline: none; transition: border-color 0.2s;
}
.pin-lock-input:focus { border-color: var(--accent, #e74c3c); }
.pin-lock-input.shake {
  animation: pinShake 0.4s ease;
}
@keyframes pinShake {
  0%,100% { transform: translateX(0); }
  20%      { transform: translateX(-8px); }
  40%      { transform: translateX(8px); }
  60%      { transform: translateX(-6px); }
  80%      { transform: translateX(6px); }
}
.pin-lock-error {
  font-size: 0.8rem; color: var(--danger, #e74c3c);
  text-align: center;
}
.pin-lock-error.hidden { display: none; }
.pin-lock-btn {
  width: 100%; padding: 14px; border: none; border-radius: 12px;
  background: var(--accent, #e74c3c); color: #fff;
  font-size: 1rem; font-weight: 600; cursor: pointer;
  transition: opacity 0.2s;
}
.pin-lock-btn:hover { opacity: 0.88; }
.pin-lock-admin-note {
  margin: 0; font-size: 0.75rem; color: var(--text2, #999);
  text-align: center;
}
.pin-lock-switch-btn {
  background: none; border: 1px solid var(--border, #ddd); border-radius: 8px;
  color: var(--text2, #666); font-size: 0.82rem; cursor: pointer;
  padding: 12px 16px; min-height: 44px; width: 100%; transition: background 0.15s;
}
.pin-lock-switch-btn:hover { background: var(--surface2, #f0f0f0); }

/* ════════════════════════════════════════════════════
   DATA SYNC OVERLAY — shown only while the one-time full
   offline sync (_runFullOfflineSyncIfNeeded) is actually running;
   a no-op/already-synced check never shows it at all.
════════════════════════════════════════════════════ */
.data-sync-overlay {
  position: fixed; inset: 0; z-index: 9998;
  background: var(--bg, #fff);
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
}
.data-sync-overlay.hidden { display: none; }
.dsync-inner {
  display: flex; flex-direction: column; align-items: center; gap: 22px;
  text-align: center;
  animation: splashFadeIn 0.35s ease;
}
.dsync-ring {
  position: relative;
  width: 68px; height: 68px;
}
.dsync-ring::before,
.dsync-ring::after {
  content: ''; position: absolute; inset: 0;
  border-radius: 50%;
  border: 5px solid transparent;
}
.dsync-ring::before {
  border-top-color: var(--accent, #e74c3c);
  border-right-color: var(--accent, #e74c3c);
  animation: dsyncSpin 1s cubic-bezier(0.5, 0, 0.5, 1) infinite;
}
.dsync-ring::after {
  border-bottom-color: rgba(231, 76, 60, 0.35);
  animation: dsyncSpin 1.6s linear infinite reverse;
}
@keyframes dsyncSpin { to { transform: rotate(360deg); } }
.dsync-title {
  font-size: 1.05rem; font-weight: 700; color: var(--text, #111);
  animation: dsyncPulse 1.8s ease-in-out infinite;
}
@keyframes dsyncPulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.6; } }
.dsync-sub {
  font-size: 0.85rem; color: var(--text2, #666); max-width: 280px; line-height: 1.4;
}

/* ════════════════════════════════════════════════════
   MOBILE: Board Mode button moved to bottom nav
════════════════════════════════════════════════════ */
@media (max-width: 768px) {
  #btn-ui-mode,
  #board-zoom-control { display: none !important; }
}

/* ════════════════════════════════════════════════════
   BOTTOM NAVIGATION — shown at every screen size (was
   mobile-only; large displays like a classroom Smart
   Board/TV have viewport widths well past any phone
   breakpoint, and the top-nav has no Words/Stats access,
   so it silently had no way to reach those sections at all)
════════════════════════════════════════════════════ */
.bottom-nav {
  display: flex;
  position: fixed;
  bottom: 0; left: 0; right: 0;
  height: 62px;
  padding-bottom: env(safe-area-inset-bottom, 0px);
  background: var(--nav, #161b22);
  border-top: 1px solid var(--border, #30363d);
  box-shadow: 0 -4px 24px rgba(0,0,0,0.45);
  z-index: 950;
}

.bnav-btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  background: none;
  border: none;
  color: var(--text2, #8b949e);
  cursor: pointer;
  padding: 6px 4px;
  -webkit-tap-highlight-color: transparent;
  position: relative;
  transition: color 0.15s;
}

.bnav-icon {
  font-size: 1.45rem;
  line-height: 1;
  display: block;
  transition: transform 0.2s cubic-bezier(0.34,1.56,0.64,1);
}

.bnav-label {
  font-size: 0.58rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.bnav-btn.bnav-active { color: var(--accent, #f0883e); }

.bnav-btn.bnav-active .bnav-icon {
  transform: translateY(-3px) scale(1.2);
}

.bnav-btn.bnav-active::after {
  content: '';
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: 30px; height: 3px;
  background: var(--accent, #f0883e);
  border-radius: 0 0 4px 4px;
}

/* Push content up so it's not hidden behind bottom nav */
.screens-wrap { padding-bottom: 72px; }

/* Board mode active — highlight mode button */
body.mode-board .bottom-nav #bnav-mode { color: var(--accent, #f0883e); }

/* Light theme bottom nav */
.theme-light .bottom-nav {
  background: var(--nav, #ffffff);
  border-top-color: var(--border, #d0d7de);
  box-shadow: 0 -2px 16px rgba(0,0,0,0.08);
}

/* ════════════════════════════════════════════════════
   DEEP STUDY — Premium Flashcard Mode
════════════════════════════════════════════════════ */

/* ── Launch button on home (appears after chapter select) ── */
.ds-launch-btn {
  display: flex; align-items: center; gap: 14px;
  width: 100%; margin-top: 14px; padding: 16px 20px;
  border: none; border-radius: 20px; cursor: pointer;
  background: linear-gradient(135deg, #1a2f5e 0%, #0d1b3e 50%, #1a1a3e 100%);
  border: 1px solid rgba(99,102,241,0.35);
  box-shadow: 0 8px 32px rgba(99,102,241,0.2), inset 0 1px 0 rgba(255,255,255,0.06);
  color: #fff;
  text-align: left;
  transition: transform 0.18s, box-shadow 0.18s, border-color 0.18s;
  position: relative; overflow: hidden;
}
.ds-launch-btn::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(99,102,241,0.15), transparent);
  opacity: 0; transition: opacity 0.2s;
}
.ds-launch-btn:hover::before,
.ds-launch-btn:focus-visible::before { opacity: 1; }
.ds-launch-btn:hover  { transform: translateY(-2px); box-shadow: 0 14px 48px rgba(99,102,241,0.32); border-color: rgba(99,102,241,0.6); }
.ds-launch-btn:active { transform: translateY(0); }
.ds-launch-icon { font-size: 2rem; flex-shrink: 0; line-height: 1; }
.ds-launch-text { flex: 1; min-width: 0; }
.ds-launch-text strong { display: block; font-size: 1rem; font-weight: 700; letter-spacing: 0.01em; }
.ds-launch-text small  { display: block; font-size: 0.78rem; color: rgba(255,255,255,0.6); margin-top: 2px; }
.ds-launch-arrow { font-size: 1.3rem; color: rgba(255,255,255,0.5); flex-shrink: 0; transition: transform 0.18s; }
.ds-launch-btn:hover .ds-launch-arrow { transform: translateX(4px); }

/* ── Screen container ── */
.ds-container {
  max-width: 560px; margin: 0 auto;
  padding: 16px 16px 48px;
  display: flex; flex-direction: column; gap: 14px;
  min-height: 100%;
}

/* ── Loading ── */
.ds-loading {
  display: flex; flex-direction: column; align-items: center;
  gap: 16px; padding: 60px 24px; color: var(--text2);
  font-size: 0.95rem;
}
.ds-loading-spinner {
  width: 44px; height: 44px; border-radius: 50%;
  border: 3px solid rgba(99,102,241,0.2);
  border-top-color: #6366f1;
  animation: dsSpin 0.9s linear infinite;
}
@keyframes dsSpin { to { transform: rotate(360deg); } }

/* ── Header ── */
.ds-header {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 8px;
}
.ds-breadcrumb {
  font-size: 0.88rem; font-weight: 600;
  color: var(--text2); letter-spacing: 0.02em;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  max-width: 60%;
}
.ds-stat-row { display: flex; gap: 6px; flex-shrink: 0; }
.ds-stat-chip {
  padding: 3px 10px; border-radius: 20px; font-size: 0.78rem; font-weight: 700;
}
.ds-stat-known  { background: rgba(16,185,129,0.15); color: #10b981; }
.ds-stat-review { background: rgba(244,63,94,0.15);  color: #f43f5e; }
.ds-stat-total  { background: rgba(255,255,255,0.08); color: var(--text2); }

/* ── Progress bar ── */
.ds-progress-wrap { display: flex; align-items: center; gap: 10px; }
.ds-progress-track {
  flex: 1; height: 6px; border-radius: 99px;
  background: rgba(255,255,255,0.08); overflow: hidden;
}
.ds-progress-fill {
  height: 100%; border-radius: 99px; width: 0%;
  background: linear-gradient(90deg, #6366f1, #8b5cf6);
  transition: width 0.5s cubic-bezier(0.4,0,0.2,1);
}
.ds-progress-text {
  font-size: 0.78rem; color: var(--text2); font-weight: 600;
  white-space: nowrap; flex-shrink: 0;
}

/* ── Card area + 3-D perspective ── */
.ds-card-area {
  position: relative;
  perspective: 900px;
  padding: 12px 0;
}
.ds-swipe-hint {
  position: absolute; top: 50%; transform: translateY(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 4px;
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.05em; text-transform: uppercase;
  opacity: 0.25; pointer-events: none; z-index: 0;
  transition: opacity 0.3s;
}
.ds-swipe-left-hint  { left: 0; color: #f43f5e; }
.ds-swipe-right-hint { right: 0; color: #10b981; }
.ds-swipe-hint span:first-child { font-size: 1.6rem; }

/* ── The flip card ── */
.ds-card {
  position: relative; width: 100%; min-height: 340px;
  transform-style: preserve-3d;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer; outline: none;
  border-radius: 24px;
}
.ds-card:focus-visible {
  box-shadow: 0 0 0 3px rgba(99,102,241,0.6);
}
.ds-card.is-flipped { transform: rotateY(180deg); }

/* Swipe out animations */
@keyframes dsSwipeR { to { transform: translateX(140%) rotate(18deg) scale(0.85); opacity: 0; } }
@keyframes dsSwipeL { to { transform: translateX(-140%) rotate(-18deg) scale(0.85); opacity: 0; } }
.ds-card.ds-swipe-right { animation: dsSwipeR 0.3s ease forwards; }
.ds-card.ds-swipe-left  { animation: dsSwipeL 0.3s ease forwards; }

/* ── Card faces (shared) ── */
.ds-card-face {
  position: absolute; inset: 0;
  backface-visibility: hidden; -webkit-backface-visibility: hidden;
  border-radius: 24px;
  padding: 24px 22px 20px;
  display: flex; flex-direction: column; gap: 12px;
  overflow-y: auto;
}

/* ── Front face ── */
.ds-card-front {
  background: linear-gradient(145deg, #1c2a3e 0%, #111827 60%, #0d1520 100%);
  border: 1px solid rgba(255,255,255,0.07);
  box-shadow:
    0 24px 64px rgba(0,0,0,0.5),
    0 1px 0 rgba(255,255,255,0.06) inset;
}
.ds-face-tag {
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase;
  color: rgba(255,255,255,0.35);
}
.ds-face-tag-answer { color: rgba(16,185,129,0.7); }
.ds-q-counter {
  font-size: 0.82rem; font-weight: 700;
  color: rgba(255,255,255,0.25); margin-bottom: -4px;
}
.ds-q-sep { margin: 0 2px; }
.ds-q-img-wrap { text-align: center; }
.ds-q-img { max-width: 100%; max-height: 180px; border-radius: 12px; object-fit: contain; }
.ds-q-text {
  font-size: 1.15rem; font-weight: 600; line-height: 1.6;
  color: #f0f6ff; flex: 1; margin: 0;
  word-break: break-word;
}
.ds-tap-hint {
  display: flex; align-items: center; gap: 8px;
  margin-top: auto; font-size: 0.8rem; color: rgba(255,255,255,0.3);
}
.ds-tap-ripple {
  width: 20px; height: 20px; border-radius: 50%;
  border: 1.5px solid rgba(255,255,255,0.25);
  animation: dsRipple 2s ease infinite;
  flex-shrink: 0;
}
@keyframes dsRipple {
  0%,100% { transform: scale(1); opacity: 1; }
  50%      { transform: scale(1.4); opacity: 0.4; }
}

/* ── Back face ── */
.ds-card-back {
  transform: rotateY(180deg);
  background: linear-gradient(145deg, #0d2518 0%, #0a1f15 60%, #051510 100%);
  border: 1px solid rgba(16,185,129,0.18);
  box-shadow:
    0 24px 64px rgba(16,185,129,0.12),
    0 1px 0 rgba(255,255,255,0.05) inset;
}
.ds-answer-text {
  font-size: 1.25rem; font-weight: 700; color: #4ade80;
  line-height: 1.5; margin: 0;
  word-break: break-word;
}
.ds-options-review {
  display: flex; flex-direction: column; gap: 6px; margin-top: 4px;
}
.ds-opt {
  display: flex; align-items: flex-start; gap: 10px;
  padding: 8px 12px; border-radius: 10px;
  font-size: 0.88rem; line-height: 1.45;
  background: rgba(255,255,255,0.04); color: rgba(255,255,255,0.6);
  border: 1px solid rgba(255,255,255,0.06);
}
.ds-opt.ds-opt-correct {
  background: rgba(16,185,129,0.12); color: #6ee7b7;
  border-color: rgba(16,185,129,0.3);
}
.ds-opt-label {
  font-size: 0.75rem; font-weight: 800; letter-spacing: 0.05em;
  min-width: 20px; color: inherit; opacity: 0.8;
  flex-shrink: 0; margin-top: 1px;
}
.ds-exp-wrap { margin-top: 4px; }
.ds-exp-label {
  font-size: 0.78rem; font-weight: 700; letter-spacing: 0.04em;
  color: rgba(250,204,21,0.7); margin-bottom: 6px;
}
.ds-exp-text {
  font-size: 0.88rem; line-height: 1.55;
  color: rgba(255,255,255,0.55); margin: 0;
  word-break: break-word;
}
.ds-back-hint {
  margin-top: auto; font-size: 0.72rem; color: rgba(255,255,255,0.2);
  text-align: center;
}
.ds-back-hint kbd {
  background: rgba(255,255,255,0.1); border-radius: 4px;
  padding: 1px 5px; font-size: 0.7rem; font-family: inherit;
}

/* ── Action bar ── */
.ds-action-bar {
  display: flex; gap: 10px; justify-content: center;
}
.ds-btn {
  flex: 1; max-width: 180px;
  display: flex; align-items: center; justify-content: center; gap: 7px;
  padding: 14px 16px; border: none; border-radius: 16px;
  font-size: 0.92rem; font-weight: 700; cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s, opacity 0.15s;
  color: #fff; letter-spacing: 0.01em;
}
.ds-btn:hover  { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.3); }
.ds-btn:active { transform: translateY(0); }
.ds-btn.hidden { display: none; }
.ds-btn-icon   { font-size: 1.1rem; line-height: 1; }
.ds-btn-hard   { background: linear-gradient(135deg, #be123c, #f43f5e); box-shadow: 0 4px 20px rgba(244,63,94,0.3); }
.ds-btn-reveal { background: linear-gradient(135deg, #2563eb, #6366f1); box-shadow: 0 4px 20px rgba(99,102,241,0.3); }
.ds-btn-known  { background: linear-gradient(135deg, #059669, #10b981); box-shadow: 0 4px 20px rgba(16,185,129,0.3); }
.ds-btn-done   { background: linear-gradient(135deg, #374151, #4b5563); box-shadow: 0 4px 16px rgba(0,0,0,0.3); }

/* ── Minimap dots ── */
.ds-minimap-wrap { display: flex; justify-content: center; padding: 4px 0; }
.ds-minimap {
  display: flex; flex-wrap: wrap; gap: 6px;
  justify-content: center; max-width: 360px;
}
.ds-dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: rgba(255,255,255,0.1);
  transition: background 0.3s, transform 0.3s, box-shadow 0.3s;
}
.ds-dot-known  { background: #10b981; }
.ds-dot-review { background: #f43f5e; }
.ds-dot-pending { background: rgba(255,255,255,0.12); }
.ds-dot-active {
  transform: scale(1.8);
  box-shadow: 0 0 0 2px rgba(255,255,255,0.35);
  background: #fff;
}
.ds-dot-known.ds-dot-active  { background: #10b981; box-shadow: 0 0 0 2px rgba(16,185,129,0.5); }
.ds-dot-review.ds-dot-active { background: #f43f5e; box-shadow: 0 0 0 2px rgba(244,63,94,0.5); }

/* ── Summary screen ── */
.ds-summary {
  display: flex; flex-direction: column; align-items: center;
  gap: 20px; padding: 32px 16px 20px;
  animation: dsFadeIn 0.4s ease;
}
@keyframes dsFadeIn { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }
.ds-summary-emoji { font-size: 4rem; line-height: 1; }
.ds-summary-title {
  font-size: 1.25rem; font-weight: 800; text-align: center;
  color: var(--text); margin: 0; line-height: 1.4;
}
.ds-summary-pct {
  font-size: 3rem; font-weight: 900;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  line-height: 1;
}
.ds-summary-stats { display: flex; gap: 16px; }
.ds-sum-card {
  flex: 1; text-align: center; padding: 20px 24px; border-radius: 20px;
  display: flex; flex-direction: column; align-items: center; gap: 6px;
}
.ds-sum-known  { background: rgba(16,185,129,0.12); border: 1px solid rgba(16,185,129,0.25); }
.ds-sum-review { background: rgba(244,63,94,0.12);  border: 1px solid rgba(244,63,94,0.25); }
.ds-sum-num { font-size: 2.5rem; font-weight: 900; line-height: 1; }
.ds-sum-known .ds-sum-num  { color: #10b981; }
.ds-sum-review .ds-sum-num { color: #f43f5e; }
.ds-sum-card label { font-size: 0.82rem; font-weight: 700; color: var(--text2); letter-spacing: 0.04em; }
.ds-summary-actions {
  display: flex; flex-direction: column; gap: 10px; width: 100%;
}
.ds-summary-actions .ds-btn { max-width: 100%; }

/* ════════════════════════════════════════════════════
   BOARD MODE — Deep Study (large screen enhancements)
════════════════════════════════════════════════════ */
.mode-board .ds-container {
  max-width: 860px;
  padding: 24px 32px 60px;
  gap: 20px;
}
.mode-board .ds-card { min-height: 440px; }
.mode-board .ds-card-face { padding: 36px 36px 28px; }
.mode-board .ds-q-text { font-size: 1.55rem; }
.mode-board .ds-answer-text { font-size: 1.55rem; }
.mode-board .ds-opt { font-size: 1.05rem; padding: 10px 16px; }
.mode-board .ds-exp-text { font-size: 1rem; }
.mode-board .ds-btn { font-size: 1.1rem; padding: 18px 24px; max-width: 240px; border-radius: 20px; }
.mode-board .ds-action-bar { gap: 16px; }
.mode-board .ds-dot { width: 12px; height: 12px; }
.mode-board .ds-summary-title { font-size: 1.7rem; }
.mode-board .ds-summary-pct { font-size: 4rem; }
.mode-board .ds-sum-num { font-size: 3.5rem; }
.mode-board .ds-launch-btn { padding: 20px 28px; }
.mode-board .ds-launch-text strong { font-size: 1.2rem; }
.mode-board .ds-launch-text small  { font-size: 0.9rem; }

/* Light theme overrides */
.theme-light .ds-card-front {
  background: linear-gradient(145deg, #f0f4ff 0%, #e8eeff 60%, #dce4ff 100%);
  border-color: rgba(99,102,241,0.12);
  box-shadow: 0 20px 60px rgba(99,102,241,0.12), 0 1px 0 rgba(255,255,255,0.9) inset;
}
.theme-light .ds-q-text { color: #0f172a; }
.theme-light .ds-face-tag { color: rgba(0,0,0,0.35); }
.theme-light .ds-q-counter { color: rgba(0,0,0,0.25); }
.theme-light .ds-tap-hint { color: rgba(0,0,0,0.25); }
.theme-light .ds-tap-ripple { border-color: rgba(0,0,0,0.2); }

.theme-light .ds-card-back {
  background: linear-gradient(145deg, #ecfdf5 0%, #d1fae5 60%, #c8f5e5 100%);
  border-color: rgba(16,185,129,0.25);
  box-shadow: 0 20px 60px rgba(16,185,129,0.12);
}
.theme-light .ds-answer-text { color: #065f46; }
.theme-light .ds-opt { background: rgba(0,0,0,0.04); color: #374151; border-color: rgba(0,0,0,0.08); }
.theme-light .ds-opt.ds-opt-correct { background: rgba(16,185,129,0.15); color: #065f46; border-color: rgba(16,185,129,0.4); }
.theme-light .ds-exp-text { color: #374151; }
.theme-light .ds-back-hint { color: rgba(0,0,0,0.2); }
.theme-light .ds-back-hint kbd { background: rgba(0,0,0,0.1); }

/* ════════════════════════════════════════
   ONBOARDING ROLE TABS
════════════════════════════════════════ */
.ob-role-tabs {
  display: flex;
  gap: 6px;
  margin-bottom: 18px;
  background: var(--bg2, rgba(255,255,255,0.06));
  border-radius: 10px;
  padding: 4px;
}
.ob-role-tab {
  flex: 1;
  padding: 11px 4px;
  border: none;
  border-radius: 7px;
  background: transparent;
  color: var(--text2, #8b949e);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.18s, color 0.18s;
  white-space: nowrap;
}
.ob-role-tab.active {
  background: var(--accent, #f0883e);
  color: #fff;
}
/* "Register" tab: always visible as a call to action, never the active role. */
.ob-role-tab-register {
  background: rgba(240, 136, 62, 0.16);
  color: var(--accent, #f0883e);
  font-weight: 800;
  border: 1px solid rgba(240, 136, 62, 0.55);
}

/* ════════════════════════════════════════
   TEACHER / PARENT DASHBOARD
════════════════════════════════════════ */
.td-topbar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border, rgba(255,255,255,0.08));
  background: var(--bg1, #161b22);
  position: sticky;
  top: 0;
  z-index: 10;
}
.td-title {
  flex: 1;
  font-size: 1rem;
  font-weight: 700;
  margin: 0;
  color: var(--text, #e6edf3);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.td-back {
  background: none;
  border: 1px solid var(--border, rgba(255,255,255,0.15));
  color: var(--accent, #f0883e);
  border-radius: 8px;
  padding: 6px 12px;
  font-size: 0.85rem;
  cursor: pointer;
}
.td-back.hidden { display: none; }
.td-refresh-btn {
  background: none;
  border: 1px solid var(--border, rgba(255,255,255,0.1));
  color: var(--text2, #8b949e);
  border-radius: 8px;
  padding: 6px 10px;
  font-size: 1rem;
  cursor: pointer;
}
#td-content, #pd-content {
  padding: 12px;
}
.td-hint {
  text-align: center;
  color: var(--text2, #8b949e);
  font-size: 0.875rem;
  padding: 24px 16px;
  line-height: 1.6;
}
.td-student-card {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--card-bg, rgba(255,255,255,0.04));
  border: 1px solid var(--border, rgba(255,255,255,0.08));
  border-radius: 12px;
  padding: 14px 16px;
  margin-bottom: 10px;
  cursor: pointer;
  transition: background 0.15s;
}
.td-student-card:hover, .td-student-card:focus {
  background: var(--card-hover, rgba(240,136,62,0.08));
  outline: none;
}
.td-student-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}
.td-student-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text, #e6edf3);
}
.td-student-code {
  font-size: 0.75rem;
  color: var(--text2, #8b949e);
  font-family: var(--mono, monospace);
}
.td-student-school {
  font-size: 0.72rem;
  color: var(--text2, #8b949e);
}
.td-student-stats {
  display: flex;
  gap: 10px;
  align-items: center;
}
.td-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  font-size: 0.8rem;
  color: var(--text, #e6edf3);
  min-width: 38px;
}
.td-stat strong { font-size: 1rem; line-height: 1.1; }
.td-stat small { color: var(--text2, #8b949e); font-size: 0.65rem; }
.td-score-good { color: #34d399; }
.td-score-avg  { color: #fbbf24; }
.td-score-low  { color: #f87171; }
.td-arrow {
  font-size: 1.2rem;
  color: var(--text2, #8b949e);
  flex-shrink: 0;
}
.td-attempt-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 10px;
  background: var(--card-bg, rgba(255,255,255,0.04));
  border: 1px solid var(--border, rgba(255,255,255,0.06));
  margin-bottom: 8px;
}
.td-attempt-meta {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}
.td-attempt-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text, #e6edf3);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.td-attempt-date {
  font-size: 0.72rem;
  color: var(--text2, #8b949e);
}
.td-attempt-score {
  font-size: 0.875rem;
  font-weight: 700;
  white-space: nowrap;
}

/* ═══════════════════════════════════════════
   TEACHER DASHBOARD — ANALYTICS
═══════════════════════════════════════════ */

/* Tab drawer — the toggle button always visible; .td-tab-row becomes the
   dropdown panel underneath it (shown/hidden via .hidden, toggled by
   teacherDashboard.js), instead of the old always-visible horizontal row. */
.td-tab-drawer-wrap {
  position: relative;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  background: var(--card-bg, #161b22);
}
.td-tab-drawer-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 12px 16px;
  background: transparent;
  border: none;
  color: var(--accent, #f97316);
  font-size: 0.92rem;
  font-weight: 700;
  cursor: pointer;
}
.td-tab-drawer-caret {
  transition: transform 0.15s;
  color: var(--text2, #8b949e);
}
.td-tab-drawer-toggle[aria-expanded="true"] .td-tab-drawer-caret {
  transform: rotate(180deg);
}

/* Tab row (dropdown panel) */
.td-tab-row {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  z-index: 20;
  display: flex;
  flex-direction: column;
  background: var(--card-bg, #161b22);
  border: 1px solid rgba(255,255,255,0.08);
  border-top: none;
  box-shadow: 0 8px 20px rgba(0,0,0,0.3);
  padding: 4px;
  gap: 2px;
}
.td-tab {
  padding: 11px 12px;
  background: transparent;
  border: none;
  border-radius: 6px;
  border-left: 3px solid transparent;
  color: var(--text2, #8b949e);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: color 0.15s, background 0.15s;
  text-align: left;
}
.td-tab:hover { background: rgba(255,255,255,0.05); }
.td-tab.active {
  color: var(--accent, #f97316);
  border-left-color: var(--accent, #f97316);
  background: rgba(249,115,22,0.08);
}
.td-tab-pane { padding: 0; }

/* Analytics sections */
.td-analytics-section {
  padding: 14px 14px 0;
  margin-bottom: 16px;
}
.td-analytics-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}
.td-analytics-icon  { font-size: 1rem; }
.td-analytics-title {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text, #e6edf3);
  margin: 0;
}
.td-analytics-sub {
  font-size: 0.7rem;
  color: var(--text2, #8b949e);
  margin-left: auto;
}
.td-hint-sm {
  font-size: 0.8rem;
  padding: 8px 0;
}

/* Bar chart */
.td-bar-chart {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  height: 120px;
  padding: 0 4px;
}
.td-bar-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  height: 100%;
}
.td-bar-count {
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--text2, #8b949e);
  min-height: 14px;
}
.td-bar-track {
  flex: 1;
  width: 100%;
  display: flex;
  align-items: flex-end;
  background: rgba(255,255,255,0.04);
  border-radius: 4px 4px 0 0;
  overflow: hidden;
}
.td-bar {
  width: 100%;
  border-radius: 4px 4px 0 0;
  min-height: 3px;
  transition: height 0.4s ease;
}
.td-bar-good  { background: linear-gradient(180deg, #34d399, #059669); }
.td-bar-avg   { background: linear-gradient(180deg, #fbbf24, #d97706); }
.td-bar-low   { background: linear-gradient(180deg, #f87171, #dc2626); }
.td-bar-empty { background: rgba(255,255,255,0.06); }
.td-bar-label {
  font-size: 0.6rem;
  color: var(--text2, #8b949e);
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}
.td-bar-pct {
  font-size: 0.58rem;
  color: var(--text2, #8b949e);
}

/* Topic list */
.td-topic-list { display: flex; flex-direction: column; gap: 8px; }
.td-topic-row {
  display: flex;
  align-items: center;
  gap: 10px;
}
.td-topic-rank {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text2, #8b949e);
  min-width: 16px;
  text-align: right;
}
.td-topic-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.td-topic-name {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text, #e6edf3);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.td-topic-track {
  height: 6px;
  background: rgba(255,255,255,0.08);
  border-radius: 3px;
  overflow: hidden;
}
.td-topic-bar {
  height: 100%;
  border-radius: 3px;
  transition: width 0.5s ease;
}
.td-topic-bar-weak   { background: linear-gradient(90deg, #f87171, #dc2626); }
.td-topic-bar-strong { background: linear-gradient(90deg, #34d399, #059669); }
.td-topic-pct {
  font-size: 0.78rem;
  font-weight: 700;
  min-width: 36px;
  text-align: right;
  color: var(--text, #e6edf3);
}

/* Ranking list */
.td-ranking-list { display: flex; flex-direction: column; gap: 6px; }
.td-ranking-row {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: 10px;
  padding: 10px 12px;
}
.td-rank-medal {
  font-size: 1.2rem;
  min-width: 28px;
  text-align: center;
}
.td-rank-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
  overflow: hidden;
}
.td-rank-name {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text, #e6edf3);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.td-rank-code {
  font-size: 0.68rem;
  color: var(--text2, #8b949e);
}
.td-rank-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
}
.td-rank-pct {
  font-size: 1rem;
  font-weight: 800;
}
.td-rank-attempts {
  font-size: 0.65rem;
  color: var(--text2, #8b949e);
}

/* ── Notification tab & modal ── */
.td-notify-tab-header {
  padding: 12px 16px 4px;
}
.td-send-notif-btn {
  width: 100%;
  padding: 12px 16px;
  background: var(--accent, #f97316);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
}
.td-send-notif-btn:active { opacity: 0.82; }

.td-notif-row {
  margin: 8px 16px;
  padding: 12px;
  background: var(--card-bg, #161b22);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: 10px;
}
.td-notif-row-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 4px;
  gap: 8px;
  flex-wrap: wrap;
}
.td-notif-tag {
  font-size: 0.68rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 20px;
  letter-spacing: 0.03em;
}
.td-notif-tag-batch      { background: rgba(99,102,241,0.18); color: #818cf8; }
.td-notif-tag-individual { background: rgba(249,115,22,0.18); color: #fb923c; }
.td-notif-date    { font-size: 0.68rem; color: var(--text2, #8b949e); }
.td-notif-title   { font-size: 0.88rem; font-weight: 700; color: var(--text, #e6edf3); margin-bottom: 2px; }
.td-notif-body    { font-size: 0.82rem; color: var(--text2, #8b949e); margin-bottom: 6px; }
.td-notif-recipients { font-size: 0.72rem; color: var(--text2, #8b949e); }

/* Per-student notify section */
.td-section-divider {
  height: 1px;
  background: rgba(255,255,255,0.07);
  margin: 12px 16px;
}
.td-notify-btn {
  display: block;
  width: calc(100% - 32px);
  margin: 4px 16px 8px;
  padding: 11px 16px;
  background: rgba(99,102,241,0.15);
  color: #818cf8;
  border: 1px solid rgba(99,102,241,0.3);
  border-radius: 10px;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
}
.td-notify-btn:active { background: rgba(99,102,241,0.25); }
.td-notify-history-title {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text2, #8b949e);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 4px 16px 0;
  margin: 0;
}

/* Notification modal */
.td-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.65);
  z-index: 9000;
  display: flex;
  align-items: flex-end;
  justify-content: center;
}
.td-modal-backdrop.hidden { display: none; }
.td-modal {
  background: var(--bg, #0d1117);
  border-radius: 18px 18px 0 0;
  padding: 24px 20px 32px;
  width: 100%;
  max-width: 480px;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: 0 -4px 32px rgba(0,0,0,0.5);
}
.td-modal-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text, #e6edf3);
  margin: 0 0 16px;
}
.td-modal-field { margin-bottom: 12px; }
.td-modal-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text2, #8b949e);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 5px;
}
.td-modal-input, .td-modal-select, .td-modal-textarea {
  width: 100%;
  padding: 10px 12px;
  background: var(--card-bg, #161b22);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 8px;
  color: var(--text, #e6edf3);
  font-size: 0.9rem;
  box-sizing: border-box;
}
.td-modal-textarea { resize: vertical; min-height: 80px; }
.td-modal-static {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text, #e6edf3);
  font-weight: 600;
}
.td-modal-error {
  font-size: 0.82rem;
  color: #f87171;
  margin: 6px 0 0;
  padding: 8px 12px;
  background: rgba(248,113,113,0.1);
  border-radius: 6px;
}
.td-modal-error.hidden { display: none; }
.td-modal-actions {
  display: flex;
  gap: 10px;
  margin-top: 16px;
}
.td-modal-btn {
  flex: 1;
  padding: 12px;
  border: none;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
}
.td-modal-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.td-modal-btn-primary   { background: var(--accent, #f97316); color: #fff; }
.td-modal-btn-secondary { background: var(--card-bg, #161b22); color: var(--text2, #8b949e); border: 1px solid rgba(255,255,255,0.1); }

/* Light theme overrides */
.theme-light .td-tab-drawer-wrap { background: #f6f8fa; border-color: rgba(0,0,0,0.08); }
.theme-light .td-tab-row      { background: #f6f8fa; border-color: rgba(0,0,0,0.08); }
.theme-light .td-tab.active   { color: #f97316; }
.theme-light .td-analytics-title { color: #0f172a; }
.theme-light .td-bar-track    { background: rgba(0,0,0,0.06); }
.theme-light .td-topic-name   { color: #0f172a; }
.theme-light .td-topic-track  { background: rgba(0,0,0,0.06); }
.theme-light .td-rank-name    { color: #0f172a; }
.theme-light .td-ranking-row  { background: rgba(0,0,0,0.02); border-color: rgba(0,0,0,0.07); }

/* ═══════════════════════════════════════════
   UPDATE BANNER + BOTTOM SHEET
═══════════════════════════════════════════ */

.update-banner {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  background: linear-gradient(90deg, #f97316, #fb923c);
  color: #fff;
  font-size: 0.88rem;
  font-weight: 600;
  position: relative;
  z-index: 10;
}
.update-banner.hidden { display: none; }
.update-banner-icon { font-size: 1.1rem; }
.update-banner-text { flex: 1; }
.update-banner-btn {
  background: rgba(255,255,255,0.25);
  border: 1px solid rgba(255,255,255,0.5);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s;
}
.update-banner-btn:hover { background: rgba(255,255,255,0.4); }

/* Update bottom sheet backdrop */
.update-sheet-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.55);
  z-index: 1100;
}
.update-sheet-backdrop.hidden { display: none; }

/* Update bottom sheet */
.update-sheet {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 1101;
  background: var(--card-bg, #161b22);
  border-radius: 20px 20px 0 0;
  padding: 12px 20px 32px;
  box-shadow: 0 -4px 32px rgba(0,0,0,0.4);
  max-width: 520px;
  margin: 0 auto;
}
.update-sheet.hidden { display: none; }
.update-sheet-handle {
  width: 40px;
  height: 4px;
  background: rgba(255,255,255,0.2);
  border-radius: 2px;
  margin: 0 auto 16px;
}
.update-sheet-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text, #e6edf3);
  margin: 0 0 10px;
}
.update-version-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
}
.update-ver-old {
  font-size: 0.85rem;
  color: var(--text2, #8b949e);
  text-decoration: line-through;
}
.update-ver-arrow {
  color: var(--accent, #f97316);
  font-size: 1.1rem;
}
.update-ver-new {
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent, #f97316);
}
.update-sheet-subtitle {
  font-size: 0.8rem;
  color: var(--text2, #8b949e);
  margin: 0 0 6px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.update-notes {
  font-size: 0.9rem;
  color: var(--text, #e6edf3);
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 10px;
  padding: 12px 14px;
  margin-bottom: 20px;
  white-space: pre-wrap;
  line-height: 1.6;
  min-height: 48px;
}
.update-download-btn {
  width: 100%;
  background: linear-gradient(90deg, #f97316, #fb923c);
  color: #fff;
  border: none;
  border-radius: 12px;
  padding: 14px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  margin-bottom: 10px;
  transition: opacity 0.15s;
}
.update-download-btn:hover { opacity: 0.9; }
.update-close-btn {
  width: 100%;
  background: transparent;
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 12px;
  color: var(--text2, #8b949e);
  font-size: 0.9rem;
  padding: 12px;
  cursor: pointer;
  transition: background 0.15s;
}
.update-close-btn:hover { background: rgba(255,255,255,0.06); }

/* Light theme overrides */
.theme-light .update-sheet   { background: #ffffff; box-shadow: 0 -4px 32px rgba(0,0,0,0.15); }
.theme-light .update-sheet-title { color: #0f172a; }
.theme-light .update-notes   { background: rgba(0,0,0,0.03); border-color: rgba(0,0,0,0.08); color: #0f172a; }
.theme-light .update-sheet-handle { background: rgba(0,0,0,0.12); }
.theme-light .update-close-btn { border-color: rgba(0,0,0,0.12); color: #64748b; }

/* Light theme overrides — teacher/parent dashboards */
.theme-light .td-topbar    { background: #f6f8fa; border-color: rgba(0,0,0,0.1); }
.theme-light .td-title     { color: #0f172a; }
.theme-light .td-back      { border-color: rgba(0,0,0,0.15); }
.theme-light .td-student-card { background: rgba(0,0,0,0.03); border-color: rgba(0,0,0,0.08); }
.theme-light .td-student-card:hover { background: rgba(240,136,62,0.06); }
.theme-light .td-student-name { color: #0f172a; }
.theme-light .td-attempt-row { background: rgba(0,0,0,0.03); border-color: rgba(0,0,0,0.07); }
.theme-light .td-attempt-title { color: #0f172a; }
.theme-light .td-notif-row    { background: rgba(0,0,0,0.03); border-color: rgba(0,0,0,0.07); }
.theme-light .td-notif-title  { color: #0f172a; }
.theme-light .td-modal        { background: #ffffff; }
.theme-light .td-modal-input,
.theme-light .td-modal-select,
.theme-light .td-modal-textarea { background: #f6f8fa; border-color: rgba(0,0,0,0.12); color: #0f172a; }
.theme-light .td-modal-btn-secondary { background: #f1f5f9; border-color: rgba(0,0,0,0.12); color: #475569; }
.theme-light .td-notify-btn   { background: rgba(99,102,241,0.08); border-color: rgba(99,102,241,0.2); }

/* ── Parent Study Report Suggestions ── */
.pd-sug-card {
  background: var(--card-bg, #1e293b);
  border: 1px solid var(--border, rgba(255,255,255,0.08));
  border-radius: 14px;
  padding: 14px 16px;
  margin: 12px 0 8px;
}
.pd-sug-header {
  font-weight: 700;
  font-size: 0.92rem;
  margin-bottom: 10px;
  color: var(--text, #f1f5f9);
  letter-spacing: 0.02em;
}
.pd-sug-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.pd-sug-row:last-of-type { border-bottom: none; }
.pd-sug-subject {
  flex: 1;
  font-size: 0.84rem;
  font-weight: 500;
  color: var(--text, #e2e8f0);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.pd-sug-pct {
  font-size: 0.84rem;
  font-weight: 700;
  min-width: 38px;
  text-align: right;
}
.pd-sug-tag {
  font-size: 0.76rem;
  color: var(--text2, #94a3b8);
  min-width: 140px;
  text-align: right;
}
.pd-sug-overall {
  margin-top: 10px;
  padding-top: 8px;
  border-top: 1px solid rgba(255,255,255,0.06);
  font-size: 0.78rem;
  color: var(--text2, #94a3b8);
  text-align: center;
}
.theme-light .pd-sug-card { background: #fff; border-color: rgba(0,0,0,0.08); }
.theme-light .pd-sug-header { color: #0f172a; }
.theme-light .pd-sug-subject { color: #1e293b; }
.theme-light .pd-sug-row { border-bottom-color: rgba(0,0,0,0.06); }
.theme-light .pd-sug-overall { border-top-color: rgba(0,0,0,0.06); color: #64748b; }

/* ── Install Guide ── */
.install-guide {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 9999;
  display: flex;
  align-items: flex-end;
  padding: 16px;
}
.install-guide-inner {
  background: var(--card-bg, #1e293b);
  border-radius: 16px;
  padding: 20px;
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
}
.install-guide-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text, #f1f5f9);
  margin-bottom: 14px;
}
.install-guide-steps {
  padding-left: 20px;
  margin: 0 0 16px;
  color: var(--text, #e2e8f0);
  font-size: 0.88rem;
  line-height: 1.9;
}
.install-guide-steps strong { color: #f8882e; }
.install-guide-close {
  width: 100%;
  padding: 12px;
  background: #f8882e;
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
}
.theme-light .install-guide-inner { background: #fff; }
.theme-light .install-guide-title { color: #0f172a; }
.theme-light .install-guide-steps { color: #1e293b; }

/* ════════════════════════════════════════
   VOCABULARY PLAYER
════════════════════════════════════════ */
.vocab-lang-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
}
.vocab-lang-label { color: var(--text2); font-weight: 600; }
.vocab-lang-opt { display: flex; align-items: center; gap: 5px; cursor: pointer; }

.vocab-subject-bar {
  padding: 10px 16px;
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  display: flex;
  gap: 8px;
}
.vocab-select {
  flex: 1;
  min-width: 0;
  padding: 8px 10px;
  background: var(--input-bg, var(--bg));
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.88rem;
}

.vocab-test-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 12px;
  padding: 16px;
}
.vocab-test-card {
  border-radius: 12px;
  padding: 14px 12px;
  border: 2px solid var(--border);
  cursor: pointer;
  text-align: center;
  transition: transform 0.15s, border-color 0.15s;
}
.vocab-test-card:hover { transform: translateY(-2px); }
.vocab-card-new    { border-color: var(--accent); background: rgba(var(--accent-rgb, 96,165,250),0.08); }
.vocab-card-done   { border-color: #fbbf24; background: rgba(251,191,36,0.08); }
.vocab-card-pass   { border-color: #34d399; background: rgba(52,211,153,0.08); }
.vocab-test-num    { font-size: 1rem; font-weight: 700; }
.vocab-test-range  { font-size: 0.72rem; color: var(--text2); margin: 4px 0; }
.vocab-test-status { font-size: 0.75rem; font-weight: 600; }
.vocab-loading, .vocab-error { padding: 20px; text-align: center; color: var(--text2); grid-column: 1/-1; }
.vocab-empty { padding: 30px 16px; text-align: center; color: var(--text2); }

.vocab-section-label {
  background: var(--accent);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 700;
  text-align: center;
  padding: 5px;
  letter-spacing: 0.05em;
}
.vocab-progress-label { font-size: 0.8rem; color: var(--text2); margin-left: auto; }

.vocab-question-card {
  padding: 24px 16px;
  text-align: center;
  min-height: 200px;
}
.vocab-word-display {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.3;
}
.vocab-word-img {
  max-width: 200px;
  max-height: 150px;
  border-radius: 10px;
  object-fit: cover;
  margin-bottom: 8px;
}
.vocab-emoji-img {
  display: block;
  width: 120px;
  height: 120px;
  margin: 4px auto 8px;
  object-fit: contain;
  user-select: none;
}
.vocab-phonics-display {
  font-size: 0.85rem;
  color: var(--accent);
  font-family: monospace;
  margin-bottom: 12px;
}
.vocab-tts-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 20px;
  padding: 8px 18px;
  font-size: 0.88rem;
  cursor: pointer;
  margin-bottom: 16px;
}
.vocab-word-emoji {
  display: block;
  font-size: 5rem;
  line-height: 1.1;
  text-align: center;
  margin: 4px 0 8px;
  user-select: none;
}

.vocab-tts-prominent {
  display: flex;
  justify-content: center;
  width: 100%;
  max-width: 280px;
  margin: 12px auto 8px;
  padding: 14px 24px;
  font-size: 1.05rem;
  font-weight: 600;
  border-radius: 14px;
  box-shadow: 0 4px 14px rgba(0,0,0,0.18);
}
@keyframes vocab-pulse {
  0%   { transform: scale(1);    box-shadow: 0 4px 14px rgba(0,0,0,0.18); }
  50%  { transform: scale(1.05); box-shadow: 0 6px 20px rgba(0,0,0,0.28); }
  100% { transform: scale(1);    box-shadow: 0 4px 14px rgba(0,0,0,0.18); }
}
.vocab-tts-pulse {
  animation: vocab-pulse 0.9s ease-in-out 3;
}

.vocab-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: 400px;
  margin: 12px auto 0;
}
.vocab-option-btn {
  padding: 13px 16px;
  border: 2px solid var(--border);
  border-radius: 10px;
  background: var(--card-bg);
  color: var(--text);
  font-size: 0.95rem;
  cursor: pointer;
  text-align: left;
  transition: border-color 0.15s, background 0.15s;
}
.vocab-option-btn:hover:not(:disabled) { border-color: var(--accent); }
.vocab-opt-correct { border-color: #34d399 !important; background: rgba(52,211,153,0.1) !important; }
.vocab-opt-wrong   { border-color: #f87171 !important; background: rgba(248,113,113,0.1) !important; }

.vocab-spelling-input {
  width: 100%;
  max-width: 300px;
  font-size: 1.1rem;
  padding: 12px;
  border: 2px solid var(--border);
  border-radius: 10px;
  background: var(--card-bg);
  color: var(--text);
  text-align: center;
  margin-bottom: 10px;
}
.vocab-submit-btn {
  padding: 10px 24px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
}

.vocab-feedback {
  text-align: center;
  padding: 12px 16px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 8px;
  margin: 8px 16px;
}
.vocab-fb-correct { background: rgba(52,211,153,0.1); color: #34d399; }
.vocab-fb-wrong   { background: rgba(248,113,113,0.1); color: #f87171; }

.vocab-next-btn {
  display: block;
  width: calc(100% - 32px);
  margin: 8px 16px;
  padding: 14px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
}

.vocab-score-card {
  padding: 24px 16px;
  text-align: center;
}
.vocab-score-total {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 16px;
}
.vocab-score-breakdown {
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  margin: 0 auto 16px;
  max-width: 320px;
}
.vocab-breakdown-row {
  display: flex;
  justify-content: space-between;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}
.vocab-breakdown-row:last-child { border-bottom: none; }
.vocab-pass-badge {
  display: inline-block;
  background: rgba(52,211,153,0.15);
  color: #34d399;
  border: 1px solid rgba(52,211,153,0.3);
  border-radius: 20px;
  padding: 6px 18px;
  font-weight: 700;
  margin-bottom: 12px;
}
.vocab-fail-badge {
  display: inline-block;
  background: rgba(251,191,36,0.1);
  color: #fbbf24;
  border: 1px solid rgba(251,191,36,0.3);
  border-radius: 20px;
  padding: 6px 18px;
  font-weight: 700;
  margin-bottom: 12px;
}
.vocab-back-home-btn {
  display: block;
  width: calc(100% - 32px);
  margin: 8px 16px;
  padding: 12px;
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
  border-radius: 12px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
}

/* Add word modal */
.vocab-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.55);
  z-index: 200;
  display: flex;
  align-items: flex-end;
  justify-content: center;
}
.vocab-modal {
  background: var(--card-bg);
  border-radius: 20px 20px 0 0;
  padding: 20px 16px 32px;
  width: 100%;
  max-width: 480px;
}
.vocab-modal-title { font-size: 1rem; font-weight: 700; margin: 0 0 12px; }
.vocab-add-preview {
  background: var(--hover-bg);
  border-radius: 8px;
  padding: 10px;
  font-size: 0.82rem;
  margin: 8px 0;
  line-height: 1.7;
}
.vocab-add-context {
  font-size: 0.78rem;
  color: var(--text2);
  background: rgba(255,255,255,0.05);
  border-radius: 6px;
  padding: 5px 10px;
  margin: 0 0 10px;
}
.vocab-add-err { color: #f87171; font-size: 0.8rem; margin-top: 6px; }
.vocab-modal-footer { display: flex; gap: 10px; margin-top: 12px; }
.vocab-modal-footer > * { flex: 1; }

/* FAB button */
.vocab-fab-btn {
  position: fixed;
  bottom: 80px;
  right: 16px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 1.5rem;
  border: none;
  cursor: pointer;
  z-index: 100;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
  display: none;
}
.vocab-fab-btn.vocab-fab-visible {
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Vocab score bars (teacher dashboard) */
.td-vocab-filter-bar {
  display: flex;
  gap: 8px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.vocab-bars { padding: 4px 0; }
.vocab-score-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 5px;
  font-size: 0.75rem;
}
.vocab-score-label { width: 56px; color: var(--text2); flex-shrink: 0; }
.vocab-score-track {
  flex: 1;
  height: 7px;
  background: var(--border);
  border-radius: 4px;
  overflow: hidden;
}
.vocab-score-fill { height: 100%; border-radius: 4px; transition: width 0.4s; }
.vocab-fill-good  { background: #34d399; }
.vocab-fill-avg   { background: #fbbf24; }
.vocab-fill-low   { background: #f87171; }
.vocab-score-pct  { width: 34px; text-align: right; color: var(--text2); flex-shrink: 0; }
.vocab-score-card-item { flex-direction: column; align-items: stretch; }

/* Light theme */
.theme-light .vocab-option-btn { background: #fff; }
.theme-light .vocab-spelling-input { background: #fff; }
.theme-light .vocab-modal { background: #fff; }

/* ═══════════════════════════════════════════
   Dictionary / Learn tab
═══════════════════════════════════════════ */

.vocab-tab-bar {
  display: flex;
  gap: 8px;
  padding: 10px 14px 0;
}

.vocab-tab-btn {
  flex: 1;
  padding: 9px 10px;
  border: 1.5px solid rgba(255,255,255,0.1);
  border-radius: 12px;
  background: transparent;
  color: var(--text2, #8b949e);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.18s, color 0.18s, background 0.18s;
}

.vocab-tab-btn.vocab-tab-active {
  border-color: var(--accent, #60a5fa);
  background: rgba(96, 165, 250, 0.12);
  color: var(--accent, #60a5fa);
}

/* Search bar */
.dict-search-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 14px 6px;
}

.dict-search-icon { font-size: 1rem; flex-shrink: 0; color: var(--text2, #8b949e); }

.dict-search-input {
  flex: 1;
  height: 42px;
  padding: 0 12px;
  border: 1.5px solid rgba(255,255,255,0.12);
  border-radius: 12px;
  background: rgba(255,255,255,0.06);
  color: var(--text, #e6edf3);
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.18s;
}

.dict-search-input:focus { border-color: var(--accent, #60a5fa); }
.dict-search-input::placeholder { color: var(--text2, #8b949e); }

.dict-clear-btn {
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: 0;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  color: var(--text2, #8b949e);
  font-size: 0.8rem;
  cursor: pointer;
  flex-shrink: 0;
}

/* Word list */
.dict-word-list {
  padding: 6px 12px 4px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.dict-word-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px;
  border: 1.5px solid rgba(255,255,255,0.08);
  border-radius: 16px;
  background: rgba(255,255,255,0.04);
  transition: border-color 0.18s, background 0.18s;
}

.dict-word-card:hover {
  border-color: rgba(255,255,255,0.18);
  background: rgba(255,255,255,0.07);
}

/* Visual block: 60×60 */
.dict-word-visual {
  width: 60px;
  height: 60px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: rgba(255,255,255,0.07);
  overflow: hidden;
}

.dict-visual-img,
.dict-visual-emoji {
  width: 52px;
  height: 52px;
  object-fit: contain;
}

.dict-visual-letter,
.dict-visual-unicode {
  font-size: 1.9rem;
  line-height: 1;
  user-select: none;
}

/* Text info */
.dict-word-info { flex: 1; min-width: 0; }

.dict-word-text {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text, #e6edf3);
  margin-bottom: 5px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.dict-word-meanings { display: flex; flex-direction: column; gap: 4px; }

.dict-meaning {
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--text2, #8b949e);
  line-height: 1.4;
}

.dict-lang-tag {
  display: inline-flex;
  align-items: center;
  padding: 1px 5px;
  border-radius: 4px;
  background: rgba(96, 165, 250, 0.15);
  color: var(--accent, #60a5fa);
  font-size: 0.62rem;
  font-weight: 700;
  flex-shrink: 0;
  letter-spacing: 0.03em;
}

.dict-lang-en {
  background: rgba(52, 211, 153, 0.15);
  color: #34d399;
}

.dict-phonics {
  font-size: 0.76rem;
  color: var(--text2, #8b949e);
  font-style: italic;
  opacity: 0.7;
}

/* Loading / error / empty */
.dict-loading,
.dict-error {
  padding: 28px 16px;
  text-align: center;
  color: var(--text2, #8b949e);
  font-size: 0.9rem;
}

.dict-empty { padding: 20px 16px; text-align: center; }

.dict-not-found-msg {
  color: var(--text2, #8b949e);
  font-size: 0.9rem;
  margin-bottom: 14px;
}

.dict-add-missing-btn {
  padding: 10px 22px;
  border: 1.5px solid var(--accent, #60a5fa);
  border-radius: 12px;
  background: rgba(96, 165, 250, 0.1);
  color: var(--accent, #60a5fa);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.18s;
}

.dict-add-missing-btn:hover { background: rgba(96, 165, 250, 0.2); }

/* Pagination row */
.dict-pagination {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 14px 80px;
}

.dict-page-btn {
  padding: 9px 14px;
  border: 1.5px solid rgba(255,255,255,0.12);
  border-radius: 10px;
  background: rgba(255,255,255,0.06);
  color: var(--text, #e6edf3);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  transition: background 0.18s, opacity 0.18s;
}

.dict-page-btn:hover:not(:disabled) { background: rgba(255,255,255,0.1); }
.dict-page-btn:disabled { opacity: 0.3; cursor: default; }

.dict-page-center {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.dict-page-info {
  font-size: 0.76rem;
  color: var(--text2, #8b949e);
  text-align: center;
}

.dict-start-test-btn {
  width: 100%;
  padding: 12px 16px;
  border: 0;
  border-radius: 12px;
  background: linear-gradient(135deg, #f97316, #ef4444);
  color: #fff;
  font-size: 0.92rem;
  font-weight: 700;
  cursor: pointer;
  letter-spacing: 0.01em;
  transition: transform 0.15s, opacity 0.15s;
  box-shadow: 0 4px 14px rgba(239, 68, 68, 0.35);
}

.dict-start-test-btn:hover  { transform: translateY(-1px); opacity: 0.92; }
.dict-start-test-btn:active { transform: scale(0.98); }

/* Light theme overrides */
.theme-light .vocab-tab-btn       { color: #555; border-color: rgba(0,0,0,0.12); }
.theme-light .dict-word-card      { background: rgba(0,0,0,0.025); border-color: rgba(0,0,0,0.08); }
.theme-light .dict-word-card:hover{ background: rgba(0,0,0,0.05); }
.theme-light .dict-word-visual    { background: rgba(0,0,0,0.05); }
.theme-light .dict-word-text      { color: #142235; }
.theme-light .dict-search-input   { background: #fff; border-color: rgba(0,0,0,0.15); color: #142235; }
.theme-light .dict-page-btn       { background: #fff; border-color: rgba(0,0,0,0.15); color: #142235; }
.theme-light .dict-clear-btn      { background: rgba(0,0,0,0.08); }

/* ═══════════════════════════════════════════
   Word Test Player (wtp-*)
═══════════════════════════════════════════ */

.wtp-test-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  padding: 16px;
}

.wtp-test-card {
  border-radius: 12px;
  padding: 14px 12px;
  border: 2px solid var(--border);
  cursor: pointer;
  text-align: center;
  transition: transform 0.15s, border-color 0.15s;
}
.wtp-test-card:hover { transform: translateY(-2px); }
.wtp-card-new  { border-color: var(--accent); background: rgba(96,165,250,0.08); }
.wtp-card-done { border-color: #fbbf24; background: rgba(251,191,36,0.08); }
.wtp-card-pass { border-color: #34d399; background: rgba(52,211,153,0.08); }
.wtp-card-title  { font-weight: 700; font-size: 0.9rem; margin-bottom: 4px; }
.wtp-card-meta   { font-size: 0.75rem; color: var(--text2); margin-bottom: 6px; }
.wtp-card-status { font-size: 0.8rem; font-weight: 600; }

.wtp-empty   { text-align: center; padding: 40px 16px; color: var(--text2); font-size: 0.9rem; }
.wtp-loading { text-align: center; padding: 40px 16px; color: var(--text2); }
.wtp-error   { color: #f87171; padding: 16px; text-align: center; font-size: 0.9rem; }

/* Player header */
.wtp-progress {
  font-size: 0.85rem;
  color: var(--text2);
  white-space: nowrap;
  padding-right: 4px;
}

.wtp-type-label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--accent, #60a5fa);
  padding: 12px 16px 2px;
}

.wtp-question-text {
  font-size: 0.9rem;
  padding: 0 16px 10px;
  color: var(--text2);
  margin: 0;
}

/* Audio button */
.wtp-audio-area {
  text-align: center;
  padding: 14px 16px 8px;
}
.wtp-tts-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--accent, #60a5fa);
  color: #fff;
  border: none;
  border-radius: 50px;
  font-size: 1.05rem;
  font-weight: 700;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.15s;
  animation: wtp-pulse 1s ease-in-out 3;
}
.wtp-tts-btn.wtp-tts-used { opacity: 0.65; animation: none; }
.wtp-tts-btn:active { transform: scale(0.97); }

@keyframes wtp-pulse {
  0%, 100% { transform: scale(1); }
  50%       { transform: scale(1.06); }
}

/* Options grid */
.wtp-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  padding: 8px 16px 0;
  max-width: 500px;
  margin: 0 auto;
}

.wtp-opt-btn {
  padding: 12px 10px;
  border: 2px solid var(--border);
  border-radius: 12px;
  background: var(--card-bg);
  font-size: 0.9rem;
  font-family: inherit;
  color: var(--text);
  cursor: pointer;
  text-align: center;
  transition: border-color 0.15s, background 0.15s;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: 72px;
  word-break: break-word;
}
.wtp-opt-btn:hover:not(:disabled) { border-color: var(--accent, #60a5fa); }
.wtp-opt-btn:disabled { cursor: default; }
.wtp-opt-selected {
  border-color: var(--accent, #60a5fa) !important;
  background: rgba(96,165,250,0.15) !important;
}

/* Image options */
.wtp-options-image .wtp-opt-btn { min-height: 100px; padding: 8px; }

.wtp-opt-visual {
  font-size: 2.6rem;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}
.wtp-opt-visual svg { width: 64px; height: 64px; }
.wtp-opt-img {
  width: 64px;
  height: 64px;
  object-fit: cover;
  border-radius: 8px;
}
.wtp-opt-label { font-size: 0.8rem; color: var(--text2); }

/* Colour options */
.wtp-options-colour .wtp-opt-btn {
  flex-direction: row;
  justify-content: flex-start;
  gap: 10px;
  padding: 12px 14px;
}
.wtp-colour-swatch {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.2);
  flex-shrink: 0;
}
.wtp-colour-label { font-size: 0.9rem; font-weight: 600; }

/* Typing input */
.wtp-typing-area {
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: stretch;
  padding: 12px 16px 0;
  max-width: 420px;
  margin: 0 auto;
}
.wtp-type-input {
  width: 100%;
  padding: 14px 16px;
  border: 2px solid var(--border);
  border-radius: 12px;
  background: var(--card-bg);
  color: var(--text);
  font-size: 1.1rem;
  text-align: center;
  font-family: inherit;
  box-sizing: border-box;
  transition: border-color 0.15s;
}
.wtp-type-input:focus { outline: none; border-color: var(--accent, #60a5fa); }

@keyframes wtp-shake {
  0%, 100% { transform: translateX(0); }
  25%       { transform: translateX(-6px); }
  75%       { transform: translateX(6px); }
}
.wtp-input-shake { animation: wtp-shake 0.4s ease; }

/* Buttons */
.wtp-submit-btn {
  padding: 13px;
  background: var(--accent, #60a5fa);
  color: #fff;
  border: none;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: opacity 0.15s;
}
.wtp-submit-btn:disabled { opacity: 0.6; cursor: default; }

.wtp-next-btn {
  display: block;
  width: calc(100% - 32px);
  margin: 14px 16px 0;
  padding: 14px;
  background: var(--accent, #60a5fa);
  color: #fff;
  border: none;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: opacity 0.15s, transform 0.1s;
}
.wtp-next-btn:disabled { opacity: 0.6; cursor: default; }
.wtp-next-btn:active:not(:disabled) { transform: scale(0.98); }

.wtp-back-home-btn {
  display: block;
  width: calc(100% - 32px);
  margin: 10px 16px 0;
  padding: 14px;
  background: transparent;
  border: 2px solid var(--border);
  border-radius: 50px;
  color: var(--text);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.15s;
}
.wtp-back-home-btn:hover { border-color: var(--accent, #60a5fa); }

/* Score card */
.wtp-score-card {
  padding: 24px 16px;
  text-align: center;
}
.wtp-score-total {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 16px;
}
.wtp-pass-badge {
  display: inline-block;
  background: rgba(52,211,153,0.15);
  color: #34d399;
  border: 1.5px solid #34d399;
  border-radius: 50px;
  padding: 8px 24px;
  font-weight: 700;
  margin-bottom: 20px;
}
.wtp-fail-badge {
  display: inline-block;
  background: rgba(251,191,36,0.1);
  color: #fbbf24;
  border: 1.5px solid #fbbf24;
  border-radius: 50px;
  padding: 8px 24px;
  font-weight: 700;
  margin-bottom: 20px;
}

/* Review list */
.wtp-review-list {
  text-align: left;
  margin: 12px 0 8px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.wtp-review-row {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1.5px solid var(--border);
}
.wtp-review-right { border-color: #34d399; background: rgba(52,211,153,0.06); }
.wtp-review-wrong { border-color: #f87171; background: rgba(248,113,113,0.06); }
.wtp-review-num {
  width: 22px;
  height: 22px;
  min-width: 22px;
  border-radius: 50%;
  background: var(--border);
  font-size: 0.7rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}
.wtp-review-icon { font-size: 1rem; line-height: 1.5; }
.wtp-review-detail { flex: 1; min-width: 0; }
.wtp-review-q    { font-size: 0.68rem; color: var(--text2); text-transform: uppercase; letter-spacing: 0.05em; }
.wtp-review-word { font-size: 0.9rem; font-weight: 700; margin-top: 1px; }
.wtp-review-correct { font-size: 0.8rem; color: #34d399; margin-top: 3px; }

/* Light theme */
.theme-light .wtp-opt-btn    { background: #fff; }
.theme-light .wtp-type-input { background: #fff; border-color: rgba(0,0,0,0.15); color: #142235; }
.theme-light .wtp-test-card  { background: #fff; }
.theme-light .wtp-colour-swatch { border-color: rgba(0,0,0,0.15); }

/* ── Fee Management Tab ──────────────────────────────────────── */
.td-fee-toolbar { display:flex; align-items:center; gap:8px; padding:8px 0 12px; flex-wrap:wrap; }
.td-fee-records-title { font-weight:700; font-size:0.95rem; flex:1; }
.fee-config-card { cursor:pointer; }
.fee-card-header { display:flex; justify-content:space-between; align-items:flex-start; margin-bottom:8px; }
.fee-card-stats  { display:flex; gap:12px; margin-bottom:8px; flex-wrap:wrap; }
.fee-stat        { display:flex; flex-direction:column; align-items:center; min-width:60px; }
.fee-stat-val    { font-size:1rem; font-weight:700; }
.fee-stat-lbl    { font-size:0.68rem; color:var(--text2); }
.fee-card-footer { display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:4px; }
.fee-badge       { font-size:0.7rem; font-weight:600; padding:2px 8px; border-radius:10px; }
.fee-badge-ok      { background:rgba(52,211,153,0.15); color:#10b981; }
.fee-badge-urgent  { background:rgba(251,146,60,0.15);  color:#f97316; }
.fee-badge-overdue { background:rgba(239,68,68,0.15);   color:#ef4444; }
.fee-badge-closed  { background:var(--border);           color:var(--text2); }
.fee-status-active { font-size:0.72rem; color:#10b981; font-weight:600; }
.fee-status-closed { font-size:0.72rem; color:var(--text2); font-weight:600; }
.fee-student-count { font-size:0.72rem; color:var(--text2); }
.fee-stats-bar   { display:flex; gap:8px; flex-wrap:wrap; padding:10px 0 4px; }
.fee-stat-chip   { background:var(--surface2,rgba(255,255,255,0.06)); border-radius:10px; padding:8px 12px; text-align:center; font-size:0.78rem; flex:1; min-width:70px; }
.fee-stat-chip strong { display:block; font-size:1rem; margin-top:2px; }
.fee-action-row  { display:flex; gap:8px; padding:6px 0 10px; flex-wrap:wrap; }
.fee-record-card { display:block; margin-bottom:8px; align-items:stretch; }
.fee-record-header  { display:flex; justify-content:space-between; align-items:center; margin-bottom:6px; }
.fee-record-amounts { display:flex; gap:12px; font-size:0.82rem; margin-bottom:8px; flex-wrap:wrap; }
.fee-pay-row     { display:flex; gap:6px; align-items:center; flex-wrap:wrap; margin-bottom:6px; }
.fee-pay-input   { width:90px !important; flex:none !important; }
.fee-payment-history { font-size:0.78rem; color:var(--text2); margin-top:4px; }
.fee-payment-history summary { cursor:pointer; }
.fee-pay-hist-row { padding:2px 0; }

/* ── Fee record card redesign ─────────────────────────── */
.fee-progress-wrap  { height:6px; background:var(--border,rgba(255,255,255,0.1)); border-radius:6px; overflow:hidden; margin:4px 0 2px; }
.fee-progress-bar   { height:100%; background:var(--accent,#6c63ff); border-radius:6px; transition:width 0.4s ease; }
.fee-amounts-grid   { display:flex; flex-direction:column; gap:4px; margin:8px 0 4px; }
.fee-amount-row     { display:flex; justify-content:space-between; font-size:0.82rem; }
.fee-amt-label      { color:var(--text2); }
.fee-amt-val        { font-weight:600; }
.fee-record-paid    { border-left:3px solid #22c55e; }
.fee-record-paid-banner { background:rgba(34,197,94,0.12); color:#22c55e; font-weight:700; font-size:0.9rem; text-align:center; padding:8px; border-radius:8px; margin-bottom:8px; }
.fee-installment-section { background:var(--surface2,rgba(255,255,255,0.05)); border-radius:10px; padding:10px 12px; margin:8px 0; }
.fee-installment-title   { font-size:0.82rem; font-weight:600; color:var(--accent,#6c63ff); margin-bottom:8px; }
.fee-installment-row     { display:flex; flex-direction:column; gap:8px; margin-bottom:8px; }
.fee-installment-field   { display:flex; flex-direction:column; gap:2px; width:100%; }
.fee-inst-label          { font-size:0.73rem; color:var(--text2); font-weight:500; text-transform:uppercase; }
.fee-installment-actions { display:flex; gap:8px; align-items:center; flex-wrap:wrap; margin-bottom:8px; }
.fee-save-installment-btn { min-height:44px; padding:8px 16px; }
.fee-upi-btn    { background:rgba(99,102,241,0.15); color:var(--accent,#6c63ff); border:1px solid rgba(99,102,241,0.3); border-radius:8px; padding:6px 12px; font-size:0.8rem; cursor:pointer; font-weight:600; }
.fee-upi-btn:active { opacity:0.75; }
.fee-upi-missing    { font-size:0.75rem; color:var(--error,#ef4444); }
.fee-upi-warn       { background:rgba(251,146,60,0.1); border:1px solid rgba(251,146,60,0.3); border-radius:8px; padding:8px 12px; font-size:0.82rem; color:#f97316; margin-bottom:8px; display:flex; align-items:center; gap:8px; }
.fee-upi-warn-btn   { background:transparent; border:1px solid #f97316; color:#f97316; border-radius:6px; padding:2px 10px; font-size:0.78rem; cursor:pointer; }
.fee-save-installment-btn { background:var(--surface2,#eee); color:var(--text); border:1px solid var(--border); border-radius:8px; padding:6px 10px; cursor:pointer; }
.td-fee-toolbar     { display:flex; gap:8px; flex-wrap:wrap; padding:6px 0 10px; }

/* ── Parent Dashboard tabs + fee card ─────────────────────────── */
.pd-tabs          { display:flex; gap:0; border-bottom:2px solid var(--border,rgba(255,255,255,0.1)); margin:0 0 12px; }
.pd-tab           { flex:1; padding:10px 4px; background:transparent; border:none; border-bottom:2px solid transparent; margin-bottom:-2px; color:var(--text2); font-size:0.88rem; font-weight:600; cursor:pointer; transition:color 0.15s,border-color 0.15s; }
.pd-tab.active    { color:var(--accent,#f97316); border-bottom-color:var(--accent,#f97316); }
.pd-tab:active    { opacity:0.75; }

.pd-overview-chips { display:flex; gap:8px; margin-bottom:12px; }
.pd-chip           { flex:1; background:var(--surface2,rgba(255,255,255,0.05)); border-radius:10px; padding:10px 8px; text-align:center; }
.pd-chip strong    { display:block; font-size:1rem; }
.pd-chip small     { font-size:0.7rem; color:var(--text2); }
.pd-chip.td-score-good strong { color:var(--success,#22c55e); }
.pd-chip.td-score-avg  strong { color:#f59e0b; }
.pd-chip.td-score-low  strong { color:var(--error,#ef4444); }

.pd-section-title  { font-size:0.82rem; font-weight:700; color:var(--text2); margin:12px 0 6px; text-transform:uppercase; letter-spacing:.04em; }

.pd-fee-card       { background:var(--card-bg,rgba(255,255,255,0.04)); border:1px solid var(--border,rgba(255,255,255,0.08)); border-radius:12px; padding:14px; margin-bottom:10px; }
.pd-fee-header     { display:flex; justify-content:space-between; align-items:center; margin-bottom:4px; }
.pd-fee-label      { font-weight:700; font-size:0.95rem; }
.pd-fee-badge      { font-size:0.72rem; font-weight:700; border-radius:20px; padding:3px 10px; }
.pd-fee-pending    { background:rgba(239,68,68,0.15); color:#ef4444; }
.pd-fee-partial    { background:rgba(245,158,11,0.15); color:#f59e0b; }
.pd-fee-paid       { background:rgba(34,197,94,0.15); color:#22c55e; }
.pd-fee-due        { font-size:0.75rem; color:var(--text2); margin-bottom:10px; }
.pd-fee-amounts    { display:flex; flex-direction:column; gap:4px; margin-bottom:6px; }
.pd-fee-amt-row    { display:flex; justify-content:space-between; font-size:0.83rem; }
.pd-fee-next       { background:rgba(99,102,241,0.08); border:1px solid rgba(99,102,241,0.2); border-radius:8px; padding:8px 10px; font-size:0.8rem; color:var(--accent,#6c63ff); margin-top:6px; }

/* ════════════════════════════════════════
   NOTES PLAYER — list + full-screen viewer
════════════════════════════════════════ */

/* Notes list cards */
.np-note-card {
  display:flex; align-items:center; gap:12px;
  background:var(--card-bg,rgba(255,255,255,0.05));
  border:1px solid var(--border,rgba(255,255,255,0.1));
  border-radius:12px; padding:14px;
  margin-bottom:10px; cursor:pointer;
  transition:background 0.15s;
}
.np-note-card:hover, .np-note-card:focus { background:var(--card-hover,rgba(255,255,255,0.1)); outline:none; }
.np-note-icon   { font-size:1.8rem; flex-shrink:0; }
.np-note-info   { flex:1; min-width:0; }
.np-note-title  { font-size:0.95rem; font-weight:600; color:var(--text,#e6edf3); white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.np-note-meta   { font-size:0.78rem; color:var(--text2,#8b949e); margin-top:2px; }
.np-note-status { font-size:1.1rem; flex-shrink:0; }
.np-list-msg    { text-align:center; color:var(--text2,#8b949e); padding:40px 0; font-size:0.9rem; }

/* Full-screen viewer overlay */
.np-overlay {
  position:fixed; inset:0; z-index:9000;
  background:#000;
  display:flex; flex-direction:column;
}
.np-overlay.hidden { display:none; }

/* Top bar */
.np-topbar {
  display:flex; align-items:center; gap:8px;
  padding:10px 12px;
  background:rgba(0,0,0,0.85);
  flex-shrink:0; min-height:48px;
}
.np-close-btn     { background:none; border:none; color:#fff; font-size:1.4rem; cursor:pointer; padding:4px 8px; line-height:1; }
.np-viewer-title  { flex:1; font-size:0.9rem; font-weight:600; color:#fff; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.np-page-info     { font-size:0.8rem; color:rgba(255,255,255,0.6); flex-shrink:0; }
.np-cache-badge   { font-size:0.75rem; color:#4ade80; flex-shrink:0; }

/* Loader */
.np-loader {
  flex:1; display:flex; flex-direction:column; align-items:center; justify-content:center; gap:16px;
}
.np-spinner {
  width:40px; height:40px; border:4px solid rgba(255,255,255,0.15);
  border-top-color:#fff; border-radius:50%;
  animation:np-spin 0.8s linear infinite;
}
@keyframes np-spin { to { transform:rotate(360deg); } }
.np-loader-msg { color:rgba(255,255,255,0.6); font-size:0.85rem; }

/* Error */
.np-error { flex:1; display:flex; flex-direction:column; align-items:center; justify-content:center; padding:24px; }
.np-error.hidden { display:none; }
.np-error-msg { color:#f87171; text-align:center; font-size:0.9rem; }

/* Viewer body — scrollable canvas area */
.np-viewer-body {
  flex:1; overflow:auto; background:#1a1a1a;
  display:flex; align-items:flex-start; justify-content:center;
  padding:8px;
}
.np-canvas { max-width:100%; display:block; }
.np-canvas.hidden { display:none; }

/* Bottom nav */
.np-bottombar {
  display:flex; justify-content:space-between;
  padding:10px 16px; background:rgba(0,0,0,0.85); flex-shrink:0;
}
.np-nav-btn {
  background:rgba(255,255,255,0.1); border:1px solid rgba(255,255,255,0.2);
  color:#fff; border-radius:8px; padding:10px 24px;
  font-size:0.9rem; cursor:pointer; transition:background 0.15s;
}
.np-nav-btn:hover   { background:rgba(255,255,255,0.2); }
.np-nav-btn:disabled { opacity:0.3; cursor:not-allowed; }


/* ════════════════════════════════════════
   WORD TEST INSIGHTS CARDS
════════════════════════════════════════ */
.wti-card {
  background: var(--c-surface, #161b22);
  border: 1px solid var(--c-border, #30363d);
  border-radius: 12px;
  padding: 14px 16px;
  margin-bottom: 14px;
}
.wti-card-title {
  font-size: 0.95rem; font-weight: 700;
  margin-bottom: 12px; color: var(--text-primary, #e6edf3);
}
/* Priority action box */
.wti-priority {
  background: rgba(249,115,22,0.1);
  border: 1px solid rgba(249,115,22,0.35);
  border-radius: 8px; padding: 10px 12px; margin-bottom: 12px;
}
.wti-priority-title { font-size: 0.88rem; font-weight: 600; color: #f97316; }
.wti-priority-action { font-size: 0.82rem; color: var(--text2, #8b949e); margin-top: 4px; }
/* Skill bars */
.wti-skills { display: flex; flex-direction: column; gap: 8px; margin-bottom: 10px; }
.wti-skill-row { display: flex; align-items: center; gap: 8px; }
.wti-skill-left { display: flex; align-items: center; gap: 5px; width: 110px; flex-shrink: 0; }
.wti-skill-icon { font-size: 1rem; }
.wti-skill-name { font-size: 0.82rem; color: var(--text2, #8b949e); }
.wti-bar-wrap {
  flex: 1; height: 8px;
  background: var(--c-border, #30363d);
  border-radius: 4px; overflow: hidden;
}
.wti-bar { height: 100%; border-radius: 4px; width: 0%; transition: width 0.6s ease; }
.wti-skill-pct { width: 36px; text-align: right; font-size: 0.82rem; font-weight: 600; flex-shrink: 0; }
.wti-badge {
  font-size: 0.72rem; border-radius: 5px;
  padding: 1px 7px; flex-shrink: 0; font-weight: 500;
}
/* Trend */
.wti-trend { font-size: 0.85rem; margin-top: 8px; }
/* Weak words */
.wti-weak-words { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin-top: 10px; }
.wti-weak-label { font-size: 0.82rem; color: var(--text2, #8b949e); }
.wti-word-chip {
  background: rgba(99,102,241,0.15); color: #818cf8;
  border: 1px solid rgba(99,102,241,0.3);
  border-radius: 6px; padding: 2px 10px; font-size: 0.82rem;
}
/* Parent card */
.wti-parent-card {
  background: var(--c-surface, #161b22);
  border: 1px solid var(--c-border, #30363d);
  border-radius: 12px; padding: 14px 16px; margin-bottom: 14px;
}
.wti-parent-header {
  display: flex; justify-content: space-between;
  align-items: center; margin-bottom: 12px;
}
.wti-parent-title { font-size: 0.95rem; font-weight: 700; }
.wti-parent-meta  { font-size: 0.78rem; color: var(--text2, #8b949e); }
.wti-parent-skills { display: flex; flex-direction: column; gap: 8px; margin-bottom: 10px; }
.wti-parent-row {
  display: flex; justify-content: space-between;
  align-items: center; padding: 4px 0;
  border-top: 1px solid var(--c-border, #30363d); font-size: 0.88rem;
}
.wti-parent-badge {
  font-size: 0.78rem; border-radius: 5px;
  padding: 2px 9px; font-weight: 600;
}
.wti-parent-action {
  background: rgba(34,197,94,0.1);
  border: 1px solid rgba(34,197,94,0.25);
  border-radius: 8px; padding: 8px 12px; margin-bottom: 10px;
}
.wti-parent-action-title { font-size: 0.82rem; font-weight: 600; color: #22c55e; }
.wti-parent-action-text  { font-size: 0.82rem; color: var(--text2, #8b949e); margin-top: 3px; }
.wti-parent-weak { display: flex; flex-wrap: wrap; align-items: center; gap: 5px; margin-top: 6px; }
/* Light theme overrides */
.theme-light .wti-card, .theme-light .wti-parent-card {
  background: #f8fafc; border-color: #e2e8f0;
}
.theme-light .wti-card-title, .theme-light .wti-parent-title { color: #1e293b; }
.theme-light .wti-bar-wrap   { background: #e2e8f0; }

/* ── Android-safe confirm/prompt dialogs (replaces native confirm/prompt) ── */
.td-dialog-overlay {
  position:fixed; inset:0; background:rgba(0,0,0,0.6); z-index:9999;
  display:flex; align-items:center; justify-content:center; padding:16px;
}
.td-dialog-box {
  background:var(--card-bg,#1e2433); border:1px solid var(--border,rgba(255,255,255,0.12));
  border-radius:14px; padding:20px 16px 16px; width:100%; max-width:340px;
}
.td-dialog-msg  { font-size:0.95rem; color:var(--text,#e6edf3); margin:0 0 14px; line-height:1.45; white-space:pre-line; }
.td-dialog-input {
  width:100%; box-sizing:border-box; background:var(--input-bg,rgba(255,255,255,0.07));
  border:1px solid var(--border,rgba(255,255,255,0.15)); border-radius:8px;
  color:var(--text,#e6edf3); font-size:1rem; padding:10px 12px; margin-bottom:14px;
}
.td-dialog-btns { display:flex; gap:10px; justify-content:flex-end; }
.td-dialog-no  {
  padding:9px 18px; border-radius:8px; border:1px solid var(--border,rgba(255,255,255,0.15));
  background:transparent; color:var(--text2,#8b949e); font-size:0.9rem; cursor:pointer; min-height:44px;
}
.td-dialog-yes {
  padding:9px 18px; border-radius:8px; border:none;
  background:var(--accent,#f97316); color:#fff; font-size:0.9rem; font-weight:600; cursor:pointer; min-height:44px;
}

/* ── Teacher Paper Builder tab (Phase 3.5 — cut-down TEACHER_PAPER_BUILDER) ── */
.tpb-container {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.tpb-form-section {
  background: var(--surface2, #f5f5f5);
  border-radius: 12px;
  padding: 12px;
}
.tpb-form-section h4 {
  margin: 0 0 8px;
  font-size: 0.95rem;
}
.tpb-form-section .td-modal-select {
  width: 100%;
  margin-bottom: 8px;
}
.tpb-marks-btns {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}
.tpb-mark-picker {
  border: 1px solid var(--border, #e2e2e2);
  border-radius: 10px;
  padding: 10px;
  margin-top: 6px;
}
.tpb-mark-picker.hidden { display: none; }
.tpb-picker-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}
.tpb-picker-list {
  max-height: 260px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 8px;
}
.tpb-picker-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px;
  border: 1px solid var(--border, #eee);
  border-radius: 8px;
  background: var(--surface1, #fff);
}
.tpb-picker-qtext { flex: 1; font-size: 0.88rem; }
.tpb-picker-meta { font-size: 0.72rem; color: var(--text-muted, #888); white-space: nowrap; }
/* Real bug found live: this button used to also carry .td-send-notif-btn
   (width:100%, meant for the big standalone "+ Batch Notification पाठवा"
   button elsewhere) — inside this flex row it fought .tpb-picker-qtext's
   flex:1 for space, squeezing question text into a narrow column and
   leaving a huge button. Own compact style instead, matching how the
   admin app's equivalent (.btn.btn-small) is already sized. */
.tpb-picker-add-btn {
  flex: 0 0 auto;
  width: auto;
  padding: 6px 12px;
  background: var(--surface2, #f0f0f0);
  color: var(--text1, #333);
  border: 1px solid var(--border, #ddd);
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}
.tpb-picker-add-btn:disabled { opacity: 0.6; cursor: default; }
.tpb-autofill-row {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  margin-top: 10px;
}
.tpb-selected-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}
.tpb-total-chip {
  background: rgba(240, 136, 62, 0.12);
  color: #e16b13;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.8rem;
}
.tpb-selected-list { display: flex; flex-direction: column; gap: 6px; }
.tpb-selected-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px;
  border: 1px solid var(--border, #eee);
  border-radius: 8px;
  background: var(--surface1, #fff);
}
.tpb-selected-text { flex: 1; font-size: 0.88rem; }
.tpb-marks-chip {
  background: rgba(240, 136, 62, 0.12);
  color: #e16b13;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 999px;
  font-size: 0.75rem;
  white-space: nowrap;
}
.btn-icon {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  padding: 4px 6px;
  border-radius: 6px;
}
.btn-icon:hover { background: var(--surface2, #eee); }

.tpb-pdf-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* ── Exercise Viewer (student, independent of Notes) ── */
.ev-container {
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.ev-section-h {
  font-size: 0.95rem;
  font-weight: 700;
  margin: 14px 0 8px;
}
.ev-groups-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.ev-group-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border: 1px solid var(--border, #e2e2e2);
  border-radius: 10px;
  padding: 12px 14px;
  background: var(--surface1, #fff);
  cursor: pointer;
}
.ev-group-card b { font-size: 0.92rem; }
.ev-group-card span { font-size: 0.78rem; color: var(--text-muted, #888); }
.ev-questions-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 10px;
}
.ev-qcard {
  border: 1px solid var(--border, #e2e2e2);
  border-radius: 10px;
  padding: 12px;
  background: var(--surface1, #fff);
  transition: box-shadow 0.3s, border-color 0.3s;
}
/* Briefly marks the question a student arrived at via Home search
   (exerciseViewer.js openQuestion()) — removed automatically after 2s. */
.ev-qcard-highlight {
  border-color: var(--accent, #f0883e);
  box-shadow: 0 0 0 3px rgba(240, 136, 62, 0.35);
}
/* Long-division / step-by-step working pasted as a ```fenced``` block (exerciseViewer.js's
   _richText) - preserves alignment spaces, which plain HTML text would otherwise collapse. */
.ex-code-block {
  font-family: 'Courier New', Consolas, monospace;
  font-size: 13px;
  line-height: 1.4;
  white-space: pre;
  overflow-x: auto;
  background: rgba(128,128,128,.08);
  border: 1px solid rgba(128,128,128,.25);
  border-radius: 6px;
  padding: 8px 12px;
  margin: 6px 0;
}
.ev-qtop {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}
.ev-qnum { font-weight: 700; }
.ev-qtext { font-size: 0.9rem; margin-bottom: 8px; }
.ev-reveal-btn {
  border: 1px solid #e16b13;
  color: #e16b13;
  background: transparent;
  border-radius: 8px;
  padding: 6px 12px;
  font-size: 0.8rem;
  font-weight: 600;
}
.ev-atext {
  margin-top: 8px;
  padding: 8px 10px;
  background: #f0fdf4;
  border-left: 3px solid #16a34a;
  border-radius: 4px;
  font-size: 0.85rem;
  color: #166534;
}
.ev-atext.hidden { display: none; }
.ev-diagram { margin-top: 8px; }
.ev-diagram img { max-width: 100%; max-height: 320px; display: block; border: 1px solid var(--border, #ddd); border-radius: 6px; }
.ev-diagram-caption { font-size: 0.75rem; color: var(--text-secondary, #6b7a93); margin-top: 4px; }

/* Teacher Paper Builder — Subject/Chapter multi-select checklist (matches
   admin-app/paperBuilder.js's .student-batch-item pattern, reimplemented
   here since admin-ui.css's tokens aren't loaded in the student-app build). */
.form-group { margin-bottom: 14px; }
.pb-multi-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-dim, var(--text));
  margin-bottom: 6px;
}
.pb-multi-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 8px;
  max-height: 220px;
  overflow-y: auto;
}
.student-batch-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: var(--radius-sm, 10px);
  border: 1px solid var(--border);
  background: var(--bg3);
  font-size: 0.85rem;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.student-batch-item:has(input:checked) {
  border-color: var(--accent);
  background: rgba(var(--accent-rgb), 0.1);
}
.student-batch-item input { margin: 0; accent-color: var(--accent); }
.pb-chapter-subject-tag {
  font-size: 0.72rem;
  color: var(--text-dim, var(--text));
  opacity: 0.7;
  margin-left: 4px;
}

/* Teacher Paper Builder: per-batch paper quota bar */
.tpb-quota-bar { margin: 8px 0 4px; padding: 8px 12px; border-radius: 8px; font-size: 0.82rem; line-height: 1.5; background: rgba(249,115,22,0.10); border: 1px solid rgba(249,115,22,0.35); }
.tpb-quota-bar.unlimited { background: rgba(16,185,129,0.10); border-color: rgba(16,185,129,0.4); }
.tpb-quota-bar.exceeded { background: rgba(239,68,68,0.10); border-color: rgba(239,68,68,0.45); }

/* Teacher dashboard: Share tab */
.td-share-box { padding: 14px; }
.td-share-box h4 { margin: 0 0 6px; }
.td-share-hint { font-size: 0.82rem; color: var(--text2, #8b949e); margin: 6px 0 10px; line-height: 1.5; }
.td-share-code { font-size: 0.95rem; margin-bottom: 10px; }
.td-share-code strong { display: inline-block; padding: 3px 12px; border-radius: 8px; border: 1px dashed var(--accent, #f97316); letter-spacing: 0.08em; }
.td-share-msg { width: 100%; box-sizing: border-box; margin: 10px 0; padding: 10px; border-radius: 8px; border: 1px solid var(--border, #30363d); background: var(--surface2, #161b22); color: var(--text1, #e6edf3); font: inherit; font-size: 0.86rem; line-height: 1.5; resize: vertical; }

/* Free plan: locked chapter rows */
.chapter-item.chapter-locked { opacity: 0.65; }
.chapter-item.chapter-locked .chapter-meta { color: var(--accent, #f97316); }

/* ════════════════════════════════════════════════════════════════════════════
   Dark + High-contrast reading polish (Exercise, and shared tokens)
   Root cause of the white Exercise cards: --surface1 (and --text-muted / --text-secondary /
   --text-dim) were never defined, so every fallback colour was a LIGHT one in every theme.
   Rule of thumb on dark themes: questions / headings yellow, answers and body text white.
════════════════════════════════════════════════════════════════════════════ */
.theme-dark, .theme-light, .theme-contrast {
  --surface1: var(--card);
  --text-muted: var(--text2);
  --text-secondary: var(--text2);
  --text-dim: var(--text);
}
.theme-dark     { --read-yellow: #facc15; }
.theme-contrast { --read-yellow: #ffff00; }
.theme-dark .ev-qnum, .theme-contrast .ev-qnum,
.theme-dark .ev-qtext, .theme-contrast .ev-qtext,
.theme-dark .ev-group-card b, .theme-contrast .ev-group-card b { color: var(--read-yellow); }
.theme-dark .ev-group-card span, .theme-contrast .ev-group-card span { color: #e6edf3; }
.theme-dark .ev-qcard, .theme-contrast .ev-qcard,
.theme-dark .ev-group-card, .theme-contrast .ev-group-card { background: var(--card); border-color: var(--border); }
.theme-dark .ev-atext, .theme-contrast .ev-atext {
  background: rgba(255, 255, 255, 0.07);
  border-left-color: var(--read-yellow);
  color: #ffffff;
}
.theme-dark .ev-reveal-btn, .theme-contrast .ev-reveal-btn { border-color: var(--read-yellow); color: var(--read-yellow); }
.theme-dark .ev-qcard th, .theme-contrast .ev-qcard th { background: rgba(255, 255, 255, 0.1) !important; color: var(--read-yellow); border-color: #555 !important; }
.theme-dark .ev-qcard td, .theme-contrast .ev-qcard td { border-color: #444 !important; }
.theme-dark .back-btn, .theme-contrast .back-btn {
  background: transparent; color: var(--read-yellow); border: 1px solid var(--read-yellow); border-radius: 8px; padding: 4px 10px;
}

/* Exercise: Passage Block practice (comprehension/poetry/nonverbal/writing — see PassageBlock) */
.ev-pb-passage { padding: 10px 12px; border: 1px solid var(--border, #e2e2e2); border-radius: 8px; background: rgba(128,128,128,.06); font-size: 0.88rem; line-height: 1.7; margin-bottom: 10px; }
.ev-pb-sub { margin: 14px 0; padding-top: 10px; border-top: 1px dashed var(--border, #e2e2e2); }
.ev-pb-sub:first-child { border-top: none; margin-top: 0; }
.ev-pb-sub-head { display: flex; justify-content: space-between; align-items: center; gap: 8px; margin-bottom: 6px; font-size: 0.9rem; }
.ev-pb-item { display: flex; gap: 8px; margin: 6px 0; font-size: 0.88rem; }
.ev-pb-item-no { font-style: italic; opacity: .75; flex-shrink: 0; }
.ev-pb-center { font-weight: 700; margin-bottom: 4px; }
.ev-pb-diagram-row { display: flex; gap: 8px; align-items: center; margin: 3px 0; font-size: 0.88rem; }
.ev-pb-points { margin: 8px 0 0; padding-left: 20px; font-size: 0.88rem; }
.theme-dark .ev-pb-passage, .theme-contrast .ev-pb-passage,
.theme-dark .ev-pb-sub-head, .theme-contrast .ev-pb-sub-head,
.theme-dark .ev-pb-item, .theme-contrast .ev-pb-item,
.theme-dark .ev-pb-diagram-row, .theme-contrast .ev-pb-diagram-row,
.theme-dark .ev-pb-points, .theme-contrast .ev-pb-points,
.theme-dark .ev-pb-center, .theme-contrast .ev-pb-center { color: var(--read-yellow); }
.theme-dark .ev-pb-passage, .theme-contrast .ev-pb-passage { background: rgba(255,255,255,.05); border-color: var(--border); }

/* Teacher Dashboard > Earnings (partners) */
.pe-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 8px; margin: 8px 0; }
.pe-card { display: flex; flex-direction: column; gap: 2px; padding: 10px 12px; border-radius: 12px; border: 1px solid rgba(249,115,22,.4); background: rgba(249,115,22,.08); }
.pe-card b { font-size: 1.35rem; }
.pe-card small { opacity: .8; font-size: 0.72rem; }
.pe-h { margin: 14px 0 6px; }
.pe-warn { color: #dc2626; font-size: 0.85rem; font-weight: 600; }
.pe-stmt { border: 1px solid var(--border, rgba(128,128,128,.3)); border-radius: 10px; padding: 8px 10px; margin-bottom: 8px; }
.pe-stmt-top { display: flex; justify-content: space-between; align-items: center; }
.pe-lines { display: flex; flex-wrap: wrap; gap: 4px 12px; font-size: 0.85rem; margin-top: 4px; }
.pe-badge { font-size: 0.72rem; padding: 2px 8px; border-radius: 999px; background: rgba(128,128,128,.2); }
.pe-badge.closed { background: rgba(249,115,22,.2); font-weight: 700; }
.pe-badge.paid { background: rgba(16,185,129,.2); font-weight: 700; }
.pe-form { display: flex; flex-direction: column; gap: 8px; margin-top: 8px; }

/* Partner / teacher registration: type switch */
.treg-type { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 4px; }
.treg-type-btn { flex: 1 1 140px; padding: 10px 12px; border-radius: 12px; border: 1px solid var(--border, #d0d7de); background: transparent; color: inherit; font-weight: 600; font-size: 0.85rem; }
.treg-type-btn.active { border-color: var(--accent, #e16b13); background: rgba(var(--accent-rgb, 225,107,19), 0.12); }

.pe-link { display: flex; flex-direction: column; gap: 6px; }
.pe-steps { margin: 4px 0 0; padding-left: 18px; font-size: 0.85rem; line-height: 1.55; }

/* Student Home > Refer & Earn */
.re-card { margin: 10px 0; padding: 12px 14px; border-radius: 14px; border: 1px solid rgba(249,115,22,.4); background: rgba(249,115,22,.08); }
.re-card-head { display: flex; justify-content: space-between; align-items: center; }
.re-card-line { font-size: 0.85rem; margin: 4px 0 8px; }
.re-badge { font-size: 0.72rem; padding: 2px 8px; border-radius: 999px; background: #16a34a; color: #fff; font-weight: 700; }
.re-bar { height: 8px; border-radius: 999px; background: rgba(128,128,128,.25); overflow: hidden; margin-bottom: 10px; }
.re-bar span { display: block; height: 100%; background: var(--accent, #e16b13); border-radius: 999px; }
.re-open-btn { border: 1px solid var(--accent, #e16b13); color: var(--accent, #e16b13); background: transparent; border-radius: 10px; padding: 8px 14px; font-weight: 700; font-size: 0.85rem; cursor: pointer; }
.re-modal { position: fixed; inset: 0; z-index: 9000; background: rgba(0,0,0,.6); display: flex; align-items: flex-end; justify-content: center; }
.re-sheet { width: 100%; max-width: 520px; max-height: 92vh; overflow-y: auto; background: var(--bg2, #fff); color: var(--text, #111); border-radius: 18px 18px 0 0; padding: 16px; }
.re-sheet-head { display: flex; justify-content: space-between; align-items: center; }
.re-sheet h3, .re-sheet h4 { margin: 8px 0 4px; }
.re-x { background: transparent; border: 0; font-size: 1.2rem; color: inherit; }
.re-hint { font-size: 0.8rem; opacity: .8; margin: 4px 0; }
.re-counts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 8px 0; text-align: center; }
.re-counts div { padding: 8px; border-radius: 10px; border: 1px solid var(--border, rgba(128,128,128,.3)); }
.re-counts b { display: block; font-size: 1.3rem; }
.re-counts small { font-size: 0.7rem; opacity: .8; }
.re-prize { display: flex; justify-content: space-between; align-items: center; gap: 8px; padding: 10px 12px; margin: 6px 0; border-radius: 12px; border: 1px solid var(--border, rgba(128,128,128,.3)); }
.re-prize.claimable { border-color: #16a34a; background: rgba(22,163,74,.1); }
.re-prize.shipped { opacity: .85; }
.re-state { font-size: 0.75rem; opacity: .8; white-space: nowrap; }
.re-claim-btn { background: #16a34a; color: #fff; border: 0; border-radius: 10px; padding: 8px 16px; font-weight: 700; }
.re-form { display: flex; flex-direction: column; gap: 8px; margin: 10px 0; }
.re-form input, .re-form textarea, .re-msg { width: 100%; box-sizing: border-box; padding: 10px; border-radius: 10px; border: 1px solid var(--border, rgba(128,128,128,.4)); background: transparent; color: inherit; font: inherit; }
.re-consent { font-size: 0.8rem; display: flex; gap: 8px; align-items: flex-start; }
.re-err { color: #dc2626; font-size: 0.82rem; margin: 0; }
.re-row { display: flex; gap: 8px; margin-top: 8px; }

/* Study Plan (studyPlan.js) - reuses the .re-card / .re-sheet look */
.sp-lab { display: block; font-size: 0.85rem; font-weight: 600; margin: 8px 0; }
.sp-lab input { display: block; width: 100%; box-sizing: border-box; margin-top: 4px; padding: 9px 10px; border-radius: 10px; border: 1px solid var(--border, rgba(128,128,128,.4)); background: transparent; color: inherit; font-size: 0.95rem; }
.sp-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.sp-chip { display: inline-flex; align-items: center; gap: 5px; padding: 6px 10px; border-radius: 999px; border: 1px solid var(--border, rgba(128,128,128,.4)); font-size: 0.85rem; }
.sp-more { margin: 10px 0; }
.sp-lessons { margin: -4px 0 10px 14px; padding: 6px 0 0 8px; border-left: 2px solid var(--border, rgba(128,128,128,.3)); }
.sp-lessons summary { font-size: 0.8rem; opacity: 0.85; }
.sp-chip-all { font-weight: 600; }
.sp-limits { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; margin-top: 8px; }
.sp-limits label { font-size: 0.8rem; }
.sp-limits input { display: block; width: 100%; box-sizing: border-box; margin-top: 3px; padding: 7px; border-radius: 8px; border: 1px solid var(--border, rgba(128,128,128,.4)); background: transparent; color: inherit; }
.sp-task { display: flex; align-items: center; gap: 10px; padding: 9px 4px; border-bottom: 1px solid var(--border, rgba(128,128,128,.25)); }
.sp-task-main { flex: 1; min-width: 0; }
.sp-task-main b { display: block; font-size: 0.9rem; }
.sp-task-main small { opacity: .75; font-size: 0.75rem; }
.sp-task-btns { display: flex; align-items: center; gap: 4px; }
.sp-check { flex: none; width: 28px; height: 28px; border-radius: 8px; border: 2px solid var(--accent, #e16b13); background: transparent; color: #fff; font-weight: 900; }
.sp-done .sp-check { background: #16a34a; border-color: #16a34a; }
.sp-done .sp-task-main b { text-decoration: line-through; opacity: .6; }
.sp-skipped { opacity: .5; }
.sp-sub { display: flex; justify-content: space-between; font-size: 0.85rem; margin: 8px 0 3px; }
.sp-row { display: flex; gap: 8px; margin-top: 12px; }
.sp-primary { background: var(--accent, #e16b13); color: #fff; }

/* ── Busy button (UI.withBusy): turning spinner + "उघडत आहे…" ─────────── */
.is-busy {
  cursor: progress;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}
.btn-spinner {
  width: 0.95em;
  height: 0.95em;
  flex-shrink: 0;
  border-radius: 50%;
  border: 2px solid currentColor;
  border-right-color: transparent;
  animation: btn-spin 0.7s linear infinite;
}
.btn-busy-label { white-space: nowrap; }
.btn-busy-label::after {
  content: '';
  display: inline-block;
  width: 1.1em;
  text-align: left;
  animation: btn-dots 1.2s steps(1, end) infinite;
}
@keyframes btn-spin { to { transform: rotate(360deg); } }
@keyframes btn-dots {
  0%   { content: ''; }
  25%  { content: '.'; }
  50%  { content: '..'; }
  75%  { content: '...'; }
}
@media (prefers-reduced-motion: reduce) {
  .btn-spinner { animation-duration: 1.6s; }
  .btn-busy-label::after { animation: none; content: '…'; }
}

/* ── Tap feedback: buttons visibly press in under the finger ─────────── */
.quiz-portal-btn:active:not(:disabled),
.quiz-portal-video-btn:active:not(:disabled),
.chapter-hub-btn:active:not(:disabled),
.nav-arrow:active:not(:disabled),
.skip-btn:active:not(:disabled),
.td-dialog-btns button:active,
.bnav-btn:active {
  transform: scale(0.96);
}

/* Touch-sized buttons (min 44px tall) for tests and the top back / analytics. */
.quiz-portal-btn,
.quiz-portal-video-btn {
  min-height: 44px;
  padding-top: 8px;
  padding-bottom: 8px;
}
.quiz-portal-video-btn { font-size: 0.82rem; font-weight: 600; color: var(--text); white-space: nowrap; }
#btn-back.nav-back {
  min-width: 44px;
  min-height: 44px;
}
#btn-back .nav-btn-icon { font-size: 1.6rem; line-height: 1; }
#btn-analytics { min-height: 44px; }

/* ── Loading placeholders (UI.skeletonHTML): rows with a moving shine ───── */
.skel-list { display: flex; flex-direction: column; gap: 10px; padding: 4px 0; }
.skel-row {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 14px 16px;
  border: 1px solid var(--border, #e5e7eb);
  border-radius: 12px;
  background: var(--surface, transparent);
}
.skel-line {
  display: block;
  height: 12px;
  border-radius: 6px;
  background: linear-gradient(90deg,
    var(--surface2, rgba(127,127,127,0.14)) 25%,
    var(--border, rgba(127,127,127,0.26)) 50%,
    var(--surface2, rgba(127,127,127,0.14)) 75%);
  background-size: 200% 100%;
  animation: skel-shine 1.2s ease-in-out infinite;
}
.skel-w70 { width: 70%; height: 14px; }
.skel-w40 { width: 40%; }
@keyframes skel-shine { from { background-position: 200% 0; } to { background-position: -200% 0; } }
@media (prefers-reduced-motion: reduce) { .skel-line { animation: none; } }

/* Exercise opened from a chapter: "Science › Light" instead of three dropdowns. */
.ev-picked {
  margin: 0 0 12px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text2, #6b7280);
}

/* Home: "पुढे सुरू ठेवा" — one tap back into the last chapter. */
.home-continue {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  min-height: 64px;
  margin: 0 0 14px;
  padding: 12px 16px;
  text-align: left;
  border: 1px solid var(--border, #e5e7eb);
  border-left: 4px solid var(--accent, #e16b13);
  border-radius: 14px;
  background: var(--surface, #fff);
  color: var(--text, #111827);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.home-continue:active { transform: scale(0.98); }
.home-continue-icon {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--accent, #e16b13);
  color: #fff;
  font-size: 0.9rem;
}
.home-continue-text { display: flex; flex-direction: column; gap: 1px; flex: 1; min-width: 0; }
.home-continue-text strong { font-size: 1.02rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.home-continue-text small { font-size: 0.75rem; color: var(--text2, #6b7280); }
.home-continue-arrow { font-size: 1.4rem; color: var(--text2, #6b7280); }

/* Test: numbered question dots (practice) — tap to jump. */
.tp-palette {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding: 2px 2px 10px;
  margin-bottom: 6px;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}
.tp-palette::-webkit-scrollbar { display: none; }
.tp-dot {
  flex: 0 0 auto;
  min-width: 36px;
  height: 36px;
  padding: 0 6px;
  border-radius: 18px;
  border: 1px solid var(--border, #d1d5db);
  background: transparent;
  color: var(--text2, #6b7280);
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
}
.tp-dot.answered { background: var(--correct, #16a34a); border-color: var(--correct, #16a34a); color: #fff; }
.tp-dot.skipped  { border-style: dashed; color: var(--medium, #d97706); border-color: var(--medium, #d97706); }
.tp-dot.current  { outline: 2px solid var(--accent, #e16b13); outline-offset: 2px; color: var(--text, #111827); }
.tp-dot.answered.current { color: #fff; }
.tp-dot:active { transform: scale(0.94); }
/* First question: Prev has nothing to go back to. */
.nav-arrow:disabled { opacity: 0.38; cursor: default; transform: none; }

/* Bottom nav has five tabs now: room for readable labels. */
.bnav-label { font-size: 0.72rem; letter-spacing: 0.02em; }

/* A picture that can't load offline (core/imageCache.js) — a note, not a broken icon. */
.img-offline-note {
  display: inline-block;
  margin: 6px 0;
  padding: 8px 12px;
  border: 1px dashed var(--border, #d1d5db);
  border-radius: 8px;
  font-size: 0.82rem;
  color: var(--text2, #6b7280);
  background: var(--surface2, rgba(127,127,127,0.06));
}