:root {
  color-scheme: light;
  --bg: #f4f7fb;
  --panel: #ffffff;
  --panel-2: #eef4ff;
  --field: #f8fafc;
  --text: #102033;
  --muted: #65748b;
  --accent: #2563eb;
  --accent-2: #0ea5e9;
  --danger: #dc3545;
  --ok: #15803d;
  --border: #d9e2ef;
  --shadow: 0 18px 50px rgba(15, 23, 42, .08);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 10% 0%, rgba(37, 99, 235, .13), transparent 30rem),
    linear-gradient(180deg, #ffffff 0%, var(--bg) 28rem);
  color: var(--text);
  line-height: 1.55;
}

.app-header {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1.5rem 2rem;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, .86);
  backdrop-filter: blur(16px);
}

h1, h2, p { margin-top: 0; }
.eyebrow { color: var(--accent); text-transform: uppercase; letter-spacing: .12em; font-size: .76rem; }
.subtitle, .muted { color: var(--muted); }
.status {
  align-self: start;
  max-width: 26rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: .65rem 1rem;
  background: rgba(255, 255, 255, .85);
}
.status[data-tone="success"] { border-color: var(--ok); color: var(--ok); }
.status[data-tone="error"] { border-color: var(--danger); color: var(--danger); }

.layout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  padding: 1rem;
  max-width: 1240px;
  margin-inline: auto;
}
.card {
  background: rgba(255, 255, 255, .94);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 1rem;
  box-shadow: var(--shadow);
}
.card.wide { grid-column: 1 / -1; }
.stack { display: grid; gap: .85rem; }
.grid.two { display: grid; grid-template-columns: 1fr 1fr; gap: .75rem; }

label { display: grid; gap: .35rem; color: var(--muted); font-size: .92rem; }
.checkline { grid-template-columns: auto 1fr; align-items: start; color: var(--text); }
.sanitization-box {
  border: 1px solid var(--border);
  border-radius: .75rem;
  padding: .75rem .9rem;
  background: var(--field);
  color: var(--muted);
  font-size: .88rem;
}
.sanitization-box p { margin-bottom: .4rem; }
.sanitization-box ul { margin: 0; padding-left: 1.2rem; }
.sample-box,
.track-box,
.draft-protection-box,
.daily-practice-box,
.starter-deck-box,
.structured-feedback-box,
.correction-diff-box,
.bilingual-box,
.ai-notes-prompt-box,
.sentence-focus-box {
  border: 1px solid var(--border);
  border-radius: .85rem;
  padding: .85rem;
  margin-bottom: 1rem;
  background: var(--field);
}
.sample-box h3,
.track-box h3,
.draft-protection-box h3,
.daily-practice-box h3,
.starter-deck-box h3,
.structured-feedback-box h3,
.correction-diff-box h3,
.bilingual-box h3,
.ai-notes-prompt-box h3,
.sentence-focus-box h3 { margin: 0 0 .45rem; font-size: 1rem; }
.sample-box p,
.track-box p,
.draft-protection-box p,
.daily-practice-box p,
.starter-deck-box p,
.structured-feedback-box p,
.correction-diff-box p,
.bilingual-box p,
.ai-notes-prompt-box p,
.sentence-focus-box p { margin-bottom: .65rem; }
input, select, textarea, button {
  width: 100%;
  min-height: 44px;
  border-radius: .7rem;
  border: 1px solid var(--border);
  background: #ffffff;
  color: var(--text);
  padding: .7rem .8rem;
  font: inherit;
}
textarea { resize: vertical; }
button {
  cursor: pointer;
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  border: 0;
  color: #ffffff;
  font-weight: 700;
}
button.secondary { background: var(--panel-2); border: 1px solid var(--border); color: var(--text); font-weight: 600; }
button:not(.secondary):not(:disabled):hover { filter: brightness(1.08); }
button.secondary:not(:disabled):hover { border-color: var(--accent); }
.button-row { display: flex; gap: .75rem; margin-bottom: .75rem; }
.asset-list { list-style: none; padding: 0; margin: 0; display: grid; gap: .5rem; }
.asset-button {
  text-align: left;
  background: var(--panel-2);
  border: 1px solid var(--border);
  transition: border-color .12s ease, box-shadow .12s ease, background .12s ease;
}
.asset-button:hover { border-color: var(--accent); }
.asset-button.selected {
  border-color: var(--accent);
  box-shadow: inset 3px 0 0 0 var(--accent), 0 0 0 1px rgba(56, 189, 248, .28);
  background: linear-gradient(180deg, rgba(56, 189, 248, .12), var(--panel-2));
}
.json-panel {
  max-height: 32rem;
  overflow: auto;
  white-space: pre-wrap;
  background: var(--field);
  border: 1px solid var(--border);
  border-radius: .8rem;
  padding: 1rem;
}

@media (max-width: 900px) {
  .app-header, .layout { grid-template-columns: 1fr; display: grid; }
  .grid.two { grid-template-columns: 1fr; }
  .starter-deck { grid-template-columns: 1fr; }
  .app-header { padding: 1rem; }
  .layout { padding: .75rem; }
  .card { border-radius: .9rem; }
}
.grid.three { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .75rem; margin: .75rem 0; }
.gate { border: 1px solid var(--border); border-radius: .75rem; padding: .75rem; background: #ffffff; }
.gate[data-allowed="true"] { border-color: var(--ok); color: var(--ok); }
.gate[data-allowed="false"] { border-color: var(--danger); color: var(--danger); }
button:disabled { opacity: .45; cursor: not-allowed; filter: grayscale(1); }
.button-row.wrap { flex-wrap: wrap; }
.button-row.compact { margin: .35rem 0 0; }
.button-row.compact button { padding: .45rem .65rem; font-size: .86rem; min-height: 44px; }
.draft-status {
  border: 1px solid var(--border);
  border-radius: .75rem;
  padding: .7rem;
  background: #ffffff;
}
.draft-status[data-state="saved"] { border-color: rgba(37, 99, 235, .55); color: var(--accent); }
.draft-status[data-state="restored"] { border-color: var(--ok); color: var(--ok); }
.draft-status[data-state="error"] { border-color: var(--danger); color: var(--danger); }
.diff-summary {
  border: 1px solid var(--border);
  border-radius: .75rem;
  padding: .65rem .75rem;
  background: #ffffff;
}
.diff-output {
  min-height: 4rem;
  border: 1px solid var(--border);
  border-radius: .75rem;
  padding: .75rem;
  background: #ffffff;
  line-height: 1.9;
}
.diff-token {
  display: inline-block;
  margin: .08rem .1rem;
  padding: .05rem .18rem;
  border-radius: .35rem;
}
.diff-token.equal { color: var(--text); }
.diff-token.added {
  color: #166534;
  background: rgba(22, 163, 74, .22);
  border: 1px solid rgba(34, 197, 94, .3);
}
.diff-token.deleted {
  color: #be123c;
  background: rgba(225, 29, 72, .18);
  border: 1px solid rgba(244, 63, 94, .3);
  text-decoration: line-through;
}
.mini-list {
  display: grid;
  gap: .5rem;
  margin-top: .75rem;
}
.mini-list-item {
  border: 1px solid var(--border);
  border-radius: .75rem;
  padding: .7rem;
  background: #ffffff;
}
.mini-list-item p { margin: 0; color: var(--text); }
.starter-deck {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: .75rem;
  margin-top: .75rem;
}
.starter-card {
  display: grid;
  gap: .55rem;
  border: 1px solid var(--border);
  border-radius: .9rem;
  padding: .85rem;
  background: linear-gradient(180deg, #ffffff, var(--field));
}
.starter-card.selected {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px rgba(56, 189, 248, .3);
}
.starter-card h4 { margin: 0; font-size: .98rem; }
.starter-card p { margin: 0; }
.track-badge {
  justify-self: start;
  color: var(--accent);
  border: 1px solid rgba(37, 99, 235, .28);
  border-radius: 999px;
  padding: .2rem .55rem;
  font-size: .76rem;
  background: rgba(14, 165, 233, .12);
}
.starter-safety { font-size: .82rem; }
.bilingual-lines {
  display: grid;
  gap: .75rem;
  margin-top: .75rem;
}
.bilingual-section {
  display: grid;
  gap: .55rem;
}
.bilingual-section h4 {
  margin: .25rem 0 0;
  color: var(--accent);
}
.bilingual-line {
  border: 1px solid var(--border);
  border-radius: .75rem;
  padding: .7rem;
  background: #ffffff;
}
.english-sentence {
  color: var(--text);
  margin-bottom: .45rem;
}
.translation-hint {
  color: var(--muted);
  font-size: .82rem;
}
.zh-note summary {
  cursor: pointer;
  color: var(--accent);
  font-size: .9rem;
  margin-bottom: .4rem;
}
.ai-notes-prompt-box,
.sentence-focus-box {
  margin-top: .85rem;
  margin-bottom: 0;
}
.sentence-focus-status,
.notes-coverage,
.notes-preview,
.sentence-focus-card {
  border: 1px solid var(--border);
  border-radius: .75rem;
  padding: .7rem .8rem;
  background: #ffffff;
}
.notes-coverage[data-complete="true"] {
  border-color: var(--ok);
  color: var(--ok);
}
.notes-coverage[data-complete="false"] {
  border-color: rgba(245, 158, 11, .65);
  color: #b45309;
}
.notes-preview[data-state="ok"] {
  border-color: var(--ok);
  color: var(--ok);
}
.notes-preview[data-state="warn"] {
  border-color: rgba(245, 158, 11, .65);
  color: #b45309;
}
.notes-preview[data-state="error"] {
  border-color: var(--danger);
  color: var(--danger);
}
.sentence-focus-card {
  display: grid;
  gap: .65rem;
  margin-top: .65rem;
}
.sentence-focus-card h4 {
  margin: 0;
  color: var(--accent);
  font-size: .95rem;
}
.sentence-focus-english {
  color: var(--text);
  font-size: 1.05rem;
  line-height: 1.7;
  margin: 0;
}
@media (max-width: 900px) {
  .grid.three,
  .starter-deck { grid-template-columns: 1fr; }
}

/* Accessibility: keyboard focus must be visible on the training UI. */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: .4rem;
}
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
summary:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
}

/* Training-first default screen */
.training-layout {
  max-width: 1160px;
  gap: 1.25rem;
}
.training-header h1 {
  margin-bottom: .35rem;
  letter-spacing: -.03em;
}
.practice-shell {
  padding: 1.2rem;
  background:
    linear-gradient(135deg, rgba(37, 99, 235, .08), rgba(14, 165, 233, .03)),
    rgba(255, 255, 255, .98);
}
.practice-shell-copy {
  max-width: 44rem;
  margin-bottom: 1rem;
}
.practice-shell-copy h2 {
  margin-bottom: .35rem;
  font-size: clamp(1.65rem, 4vw, 2.7rem);
  letter-spacing: -.04em;
}
.practice-lead {
  color: var(--muted);
  font-size: 1.05rem;
  margin-bottom: 0;
}
.practice-flow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: .85rem;
}
.practice-step {
  display: grid;
  align-content: start;
  gap: .7rem;
  min-height: 100%;
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 1rem;
  background: #ffffff;
  box-shadow: 0 12px 28px rgba(15, 23, 42, .06);
}
.practice-step h3 {
  margin: 0;
  font-size: 1.08rem;
  letter-spacing: -.015em;
}
.practice-step p { margin-bottom: 0; }
.step-pill {
  justify-self: start;
  border-radius: 999px;
  padding: .25rem .65rem;
  background: rgba(37, 99, 235, .1);
  color: var(--accent);
  font-size: .78rem;
  font-weight: 800;
}
.practice-hint,
.practice-review-card {
  border: 1px solid var(--border);
  border-radius: .8rem;
  padding: .75rem;
  background: var(--field);
  color: var(--muted);
  font-size: .9rem;
}
.practice-hint[data-state="ready"] {
  border-color: rgba(21, 128, 61, .35);
  color: #166534;
  background: #f0fdf4;
}
.practice-hint[data-state="blocked"] {
  border-color: rgba(220, 53, 69, .35);
  color: #991b1b;
  background: #fff1f2;
}
.practice-hint[data-state="empty"] {
  color: var(--muted);
}
.business-mode-panel {
  display: grid;
  grid-template-columns: minmax(12rem, .72fr) minmax(0, 2fr);
  align-items: start;
  gap: .65rem;
  border: 1px solid rgba(37, 99, 235, .18);
  border-radius: .95rem;
  padding: .75rem;
  margin-bottom: 1rem;
  background: rgba(37, 99, 235, .045);
}
.business-mode-panel[hidden] {
  display: none;
}
.business-mode-copy h4 {
  margin: 0 0 .2rem;
  font-size: .95rem;
  letter-spacing: -.01em;
}
.business-mode-copy p {
  color: var(--muted);
  font-size: .88rem;
}
.business-mode-options {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: .45rem;
}
.business-mode-button {
  display: grid;
  gap: .15rem;
  min-height: 3.2rem;
  padding: .55rem .6rem;
  border: 1px solid var(--border);
  border-radius: .8rem;
  background: #ffffff;
  color: var(--text);
  text-align: left;
  box-shadow: none;
}
.business-mode-button:hover:not(:disabled),
.business-mode-button[aria-checked="true"] {
  border-color: rgba(37, 99, 235, .5);
  background: #eff6ff;
}
.business-mode-button[aria-checked="true"] {
  box-shadow: 0 0 0 2px rgba(37, 99, 235, .12);
}
.business-mode-button:disabled {
  cursor: not-allowed;
  opacity: .64;
}
.business-mode-label {
  font-weight: 800;
}
.business-mode-meta {
  color: var(--muted);
  font-size: .78rem;
  line-height: 1.25;
}
.business-mode-badge {
  justify-self: start;
  margin-top: .1rem;
  border-radius: 999px;
  padding: .12rem .45rem;
  background: #fff7ed;
  color: #9a3412;
  font-size: .68rem;
  font-weight: 800;
}
.business-mode-panel .practice-hint {
  grid-column: 1 / -1;
  margin: 0;
}
.practice-review-card[data-state="ready"] {
  border-color: rgba(21, 128, 61, .35);
  color: #166534;
  background: #f0fdf4;
}
.practice-review-card[data-state="blocked"] {
  border-color: rgba(220, 53, 69, .35);
  color: #991b1b;
  background: #fff1f2;
}
.quick-safety {
  border: 1px dashed rgba(37, 99, 235, .35);
  border-radius: .8rem;
  padding: .65rem;
  background: rgba(37, 99, 235, .05);
  color: var(--text);
}
.button-row.no-bottom { margin-bottom: 0; }
.advanced-workbench {
  background: rgba(255, 255, 255, .82);
}
.advanced-workbench > summary {
  justify-content: space-between;
  flex-wrap: wrap;
}
.summary-note {
  color: var(--muted);
  font-size: .9rem;
}
.advanced-workbench-body {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}
.advanced-workbench-body > .wide,
.advanced-workbench-body > .loop-progress {
  grid-column: 1 / -1;
}

@media (max-width: 1100px) {
  .practice-flow { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 760px) {
  .practice-flow,
  .advanced-workbench-body { grid-template-columns: 1fr; }
  .business-mode-panel { grid-template-columns: 1fr; }
  .business-mode-options { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .practice-shell { padding: .9rem; }
  .practice-step { padding: .9rem; }
  .app-header { gap: .9rem; }
}

/* Track-first entry point */
.track-hero-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
  gap: .75rem;
  margin-top: .75rem;
}
.track-hero-button {
  display: grid;
  gap: .3rem;
  align-content: start;
  text-align: left;
  min-height: 76px;
  padding: .85rem;
  border-radius: .85rem;
  transition: border-color .12s ease, box-shadow .12s ease, filter .12s ease;
}
.track-hero-name { font-weight: 700; font-size: 1rem; color: var(--text); }
.track-hero-hint { font-weight: 400; font-size: .82rem; color: var(--muted); line-height: 1.4; }
.track-hero-button.selected {
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  border: 0;
  box-shadow: 0 0 0 1px rgba(37, 99, 235, .28), 0 10px 30px rgba(37, 99, 235, .2);
}
.track-hero-button.selected .track-hero-name { color: #f8fafc; }
.track-hero-button.selected .track-hero-hint { color: rgba(248, 250, 252, .85); }

/* iOS standalone PWA: clear the notch / home indicator in full-screen mode.
   In a normal browser tab these env() values are 0, so nothing changes. */
@supports (padding: max(0px)) {
  body {
    padding-top: env(safe-area-inset-top);
    padding-right: env(safe-area-inset-right);
    padding-bottom: env(safe-area-inset-bottom);
    padding-left: env(safe-area-inset-left);
  }
}

/* iOS PWA: keep form controls >=16px so Safari does not auto-zoom on focus. */
input, select, textarea { font-size: 16px; }

/* Mobile IA: collapsible admin/report/export panels (sections 2b/2c/2d/8/9/10). */
details.collapsible > summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: .5rem;
  min-height: 44px;
}
details.collapsible > summary::-webkit-details-marker { display: none; }
details.collapsible > summary::before { content: '▸'; color: var(--accent); }
details.collapsible[open] > summary::before { content: '▾'; }
details.collapsible > summary h2 { margin: 0; }
details.collapsible > summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

/* Mobile IA: read-only loop-progress strip (after Assets, before the prompt). */
.loop-progress {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  margin: .25rem 0 1rem;
}
.loop-progress[hidden] { display: none; }
.loop-step, .loop-errors {
  font-size: .8rem;
  padding: .25rem .6rem;
  border-radius: 999px;
  border: 1px solid var(--border);
}
.loop-step.done { border-color: var(--ok); color: var(--ok); }
.loop-step.pending { color: var(--muted); }
.loop-errors { color: var(--muted); }

#answerBankSection .bank-filters { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 0.5rem; }
#answerBankSection .bank-list { list-style: none; padding: 0; margin: 0.5rem 0; max-height: 18rem; overflow-y: auto; -webkit-overflow-scrolling: touch; }
#answerBankSection .bank-list li { border: 1px solid var(--border); border-radius: 0.5rem; padding: 0.5rem; margin-bottom: 0.5rem; }
#answerBankSection .bank-text { white-space: pre-wrap; }
#answerBankSection .bank-meta { font-size: 0.8rem; color: var(--muted); margin: 0.25rem 0; }
#answerBankSection .bank-actions button, #answerBankSection .button-row button { min-height: 44px; }
#answerBankSection .warn, #bankItemPrivateWarning.warn { color: #fbbf24; }
.bank-capture { min-height: 44px; margin-top: 0.35rem; }

/* Slice 54: mobile-first IA shell — Welcome → Track Hub → Practice → Review → More. */
.mobile-ia-layout {
  grid-template-columns: 1fr;
  max-width: 980px;
  padding-bottom: 5.5rem;
}
.mobile-app-header {
  align-items: center;
  gap: 1rem;
}
.brand-lockup {
  display: flex;
  align-items: center;
  gap: .85rem;
  min-width: 0;
}
.brand-icon {
  flex: 0 0 auto;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  box-shadow: 0 12px 30px rgba(37, 99, 235, .18);
}
.brand-company {
  margin-bottom: .12rem;
  color: #1d4ed8;
}
.mobile-app-header h1 {
  margin-bottom: .25rem;
  letter-spacing: -.03em;
}
.mobile-primary-nav {
  position: sticky;
  top: max(.5rem, env(safe-area-inset-top));
  z-index: 20;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: .45rem;
  padding: .45rem;
  border: 1px solid rgba(148, 163, 184, .28);
  border-radius: 999px;
  background: rgba(255, 255, 255, .86);
  box-shadow: 0 18px 40px rgba(15, 23, 42, .08);
  backdrop-filter: blur(16px);
}
.mobile-nav-button {
  min-height: 42px;
  padding: .45rem .65rem;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  border: 0;
  box-shadow: none;
}
.mobile-nav-button[aria-current="page"] {
  color: #fff;
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
}
.mobile-view:not(.is-active) { display: none; }
.mobile-welcome,
.track-hub,
.practice-library,
.review-hub {
  overflow: hidden;
}
.mobile-welcome {
  display: grid;
  gap: 1rem;
  padding: clamp(1rem, 4vw, 1.8rem);
  background:
    radial-gradient(circle at 8% 0%, rgba(37, 99, 235, .18), transparent 18rem),
    linear-gradient(180deg, #fff, #f8fbff);
}
.welcome-hero-copy h2,
.track-hub-header h2,
.practice-library h2,
.review-hub h2,
.mobile-more-intro h2 {
  margin-bottom: .4rem;
  font-size: clamp(1.55rem, 6vw, 2.45rem);
  line-height: 1.05;
  letter-spacing: -.045em;
}
.welcome-hero-copy p,
.track-hub-header p,
.practice-library p,
.review-hub p,
.mobile-more-intro p { margin-bottom: 0; }
.welcome-track-grid,
.module-card-grid,
.library-panel-grid,
.review-summary-grid {
  display: grid;
  gap: .9rem;
}
.welcome-track-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.welcome-track-card,
.module-card,
.library-panel,
.review-summary-grid article {
  display: grid;
  align-content: start;
  gap: .65rem;
  min-height: 12rem;
  border: 1px solid rgba(148, 163, 184, .34);
  border-radius: 1.2rem;
  padding: 1rem;
  background: #fff;
  box-shadow: 0 18px 44px rgba(15, 23, 42, .08);
}
.welcome-track-card.business {
  background: linear-gradient(160deg, #ffffff 0%, #eef6ff 100%);
}
.welcome-track-card.ielts {
  background: linear-gradient(160deg, #ffffff 0%, #fff7ed 100%);
}
.welcome-track-card h3,
.module-card h3,
.library-panel h3 {
  margin: 0;
  font-size: 1.15rem;
  letter-spacing: -.02em;
}
.welcome-track-card p,
.module-card p,
.library-panel p,
.review-summary-grid p {
  color: var(--muted);
  margin-bottom: .2rem;
}
.welcome-track-card button,
.module-card button,
.library-panel button {
  align-self: end;
}
.track-chip {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  border-radius: 999px;
  padding: .22rem .65rem;
  color: #1d4ed8;
  background: rgba(37, 99, 235, .1);
  border: 1px solid rgba(37, 99, 235, .22);
  font-size: .78rem;
  font-weight: 800;
}
.track-chip.ielts,
.ielts-hub .track-chip {
  color: #be123c;
  background: rgba(251, 113, 133, .1);
  border-color: rgba(251, 113, 133, .22);
}
.welcome-secondary-actions {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: .6rem;
}
.local-note {
  margin: 0;
  color: var(--muted);
  font-size: .9rem;
}
.track-hub,
.practice-library,
.review-hub,
.mobile-more-intro {
  display: grid;
  gap: 1rem;
}
.track-hub-header {
  display: grid;
  gap: .35rem;
}
.module-card.locked {
  border-style: dashed;
  background: linear-gradient(180deg, #f8fafc, #fff7ed);
}
.module-card.locked h3::after {
  content: ' · Locked';
  color: #9a3412;
  font-size: .8rem;
}
.library-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: .45rem;
  padding: .35rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--field);
}
.library-tab {
  min-height: 40px;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  border: 0;
}
.library-tab.selected {
  background: #fff;
  color: var(--text);
  box-shadow: 0 8px 22px rgba(15, 23, 42, .08);
}
.library-panel-grid,
.review-summary-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.library-panel {
  min-height: 10rem;
}
.review-summary-grid article {
  min-height: 7.5rem;
  box-shadow: none;
  background: var(--field);
}
.review-summary-grid strong {
  display: block;
  font-size: 2rem;
  line-height: 1;
  letter-spacing: -.04em;
}
.mobile-more-intro,
.advanced-workbench {
  display: none;
}
body[data-mobile-view="more"] .mobile-more-intro,
body[data-mobile-view="more"] .advanced-workbench {
  display: block;
}
body[data-mobile-view="more"] .mobile-more-intro {
  display: grid;
}
.locked-feature-sheet {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: end center;
  padding: 1rem;
  background: rgba(15, 23, 42, .42);
}
.locked-feature-sheet[hidden] { display: none; }
.locked-feature-card {
  width: min(100%, 28rem);
  border-radius: 1.25rem;
  padding: 1rem;
  background: #fff;
  box-shadow: 0 24px 80px rgba(15, 23, 42, .26);
}
.locked-feature-card h2 { margin-bottom: .5rem; }
.locked-feature-card p { color: var(--muted); }
.practice-shell.is-active {
  display: grid;
}
.practice-shell:not(.is-active) { display: none; }
body[data-mobile-view="practice"] .practice-shell {
  display: grid;
}
body[data-mobile-view="more"] .advanced-workbench > summary {
  border-radius: .95rem;
}
@media (min-width: 760px) {
  .module-card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .business-hub .module-card-grid { grid-template-columns: repeat(5, minmax(0, 1fr)); }
  .business-hub .module-card { min-height: 13.5rem; }
}
@media (max-width: 760px) {
  body {
    background:
      radial-gradient(circle at 10% -10%, rgba(37, 99, 235, .2), transparent 20rem),
      linear-gradient(180deg, #ffffff 0%, var(--bg) 22rem);
  }
  .mobile-app-header {
    grid-template-columns: 1fr;
    align-items: start;
  }
  .brand-lockup { align-items: flex-start; }
  .brand-icon { width: 42px; height: 42px; border-radius: 12px; }
  .mobile-app-header .status {
    width: 100%;
    max-width: none;
    border-radius: .9rem;
  }
  .mobile-primary-nav {
    bottom: max(.75rem, env(safe-area-inset-bottom));
    top: auto;
    position: fixed;
    left: .75rem;
    right: .75rem;
  }
  .welcome-track-grid,
  .module-card-grid,
  .library-panel-grid,
  .review-summary-grid,
  .welcome-secondary-actions {
    grid-template-columns: 1fr;
  }
  .welcome-track-card,
  .module-card,
  .library-panel { min-height: auto; }
}

/* Slice 55: welcome visual polish — closer to the approved Sanbian mockup. */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
body[data-mobile-view="welcome"] {
  min-height: 100vh;
  background:
    radial-gradient(circle at 50% -8%, rgba(219, 234, 254, .9), transparent 20rem),
    linear-gradient(180deg, #f8fbff 0%, #ffffff 44%, #eef6ff 100%);
}
body[data-mobile-view="welcome"]::after {
  content: '';
  position: fixed;
  left: -8vw;
  right: -8vw;
  bottom: -7rem;
  height: 17rem;
  pointer-events: none;
  background:
    radial-gradient(ellipse at 70% 20%, rgba(96, 165, 250, .2), transparent 48%),
    radial-gradient(ellipse at 22% 35%, rgba(147, 197, 253, .22), transparent 52%),
    linear-gradient(165deg, transparent 0 34%, rgba(191, 219, 254, .5) 35% 50%, transparent 51% 100%);
  opacity: .95;
}
body[data-mobile-view="welcome"] .mobile-primary-nav,
body[data-mobile-view="welcome"] .status {
  display: none;
}
body[data-mobile-view="welcome"] .mobile-ia-layout {
  max-width: 520px;
  padding: 0 1.15rem 2.5rem;
}
.mobile-app-header {
  border-bottom: 0;
  background: transparent;
  backdrop-filter: none;
  justify-content: center;
  padding: 1.4rem 1rem .25rem;
}
body:not([data-mobile-view="welcome"]) .mobile-app-header {
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, .88);
  backdrop-filter: blur(16px);
}
.sanbian-logo {
  display: block;
  width: min(21.5rem, 76vw);
  height: auto;
  object-fit: contain;
}
body:not([data-mobile-view="welcome"]) .sanbian-logo {
  width: min(13.5rem, 46vw);
}
.mobile-welcome {
  position: relative;
  z-index: 1;
  gap: 1.35rem;
  padding: .4rem 0 0;
  border: 0;
  box-shadow: none;
  background: transparent;
}
.welcome-hero-copy {
  display: grid;
  justify-items: center;
  gap: .65rem;
  margin: .85rem auto .2rem;
  text-align: center;
}
.welcome-hero-copy h2 {
  max-width: 9.4em;
  margin: 0;
  color: #07194c;
  font-size: clamp(3.05rem, 12.5vw, 4.8rem);
  font-weight: 850;
  line-height: .98;
  letter-spacing: -.065em;
  text-shadow: 0 14px 34px rgba(30, 64, 175, .09);
}
.welcome-hero-copy p {
  max-width: 18em;
  margin: 0;
  color: #44577c;
  font-size: clamp(1.18rem, 4.2vw, 1.58rem);
  line-height: 1.35;
}
.welcome-track-grid {
  grid-template-columns: 1fr;
  gap: 1rem;
}
.welcome-track-card {
  min-height: 0;
  gap: 1rem;
  padding: 1.35rem 1.25rem 1.25rem;
  border: 1px solid rgba(191, 219, 254, .86);
  border-radius: 1.7rem;
  background: rgba(255, 255, 255, .92);
  box-shadow:
    0 22px 50px rgba(37, 99, 235, .12),
    inset 0 1px 0 rgba(255, 255, 255, .82);
  backdrop-filter: blur(10px);
}
.welcome-track-card.business,
.welcome-track-card.ielts {
  background: linear-gradient(180deg, rgba(255,255,255,.96), rgba(248,251,255,.92));
}
.welcome-card-main {
  display: grid;
  grid-template-columns: 5.9rem 1fr;
  align-items: center;
  gap: 1rem;
}
.welcome-card-icon {
  display: grid;
  place-items: center;
  width: 5.9rem;
  height: 5.9rem;
  border-radius: 50%;
  color: #1456d9;
  background:
    radial-gradient(circle at 35% 25%, rgba(255,255,255,.95), transparent 42%),
    linear-gradient(145deg, #eff6ff, #dbeafe);
  border: 1px solid rgba(191, 219, 254, .72);
  font-size: 1.15rem;
  font-weight: 900;
  letter-spacing: -.03em;
}
.welcome-track-card.ielts .welcome-card-icon {
  font-size: .98rem;
}
.welcome-track-card h3 {
  margin: 0 0 .35rem;
  color: #07194c;
  font-size: clamp(1.55rem, 5.7vw, 2.08rem);
  line-height: 1.1;
  letter-spacing: -.045em;
}
.welcome-track-card p {
  margin: 0;
  color: #526486;
  font-size: clamp(1rem, 3.9vw, 1.18rem);
  line-height: 1.42;
}
.welcome-track-card button:not(.secondary) {
  min-height: 4.05rem;
  border-radius: 1rem;
  background: linear-gradient(135deg, #1665ee, #0b55dd);
  box-shadow: 0 15px 26px rgba(22, 101, 238, .23);
  font-size: clamp(1.08rem, 4.4vw, 1.34rem);
  letter-spacing: -.02em;
}
.voice-coming-later {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .45rem;
  margin: .1rem 0 0;
  color: #596b8c;
  font-size: 1rem;
}
.voice-coming-later::before {
  content: '○';
  display: inline-grid;
  place-items: center;
  width: 1.35rem;
  height: 1.35rem;
  border: 2px solid #607391;
  border-radius: 999px;
  color: transparent;
}
.welcome-secondary-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: .4rem .75rem;
  margin-top: .85rem;
}
.welcome-secondary-actions .subtle-link,
.welcome-secondary-actions .more-tools-link {
  width: auto;
  min-height: 2.65rem;
  padding: .35rem .65rem;
  border: 0;
  background: transparent;
  box-shadow: none;
  color: #0b55dd;
  font-weight: 750;
}
.welcome-secondary-actions .subtle-link {
  color: #6b7b98;
  font-weight: 650;
}
.welcome-secondary-actions .more-tools-link {
  font-size: 1.05rem;
}
@media (max-width: 420px) {
  .sanbian-logo { width: min(19rem, 78vw); }
  .welcome-hero-copy h2 { font-size: clamp(2.65rem, 12vw, 3.5rem); }
  .welcome-card-main { grid-template-columns: 4.8rem 1fr; gap: .85rem; }
  .welcome-card-icon { width: 4.8rem; height: 4.8rem; font-size: 1rem; }
  .welcome-track-card { border-radius: 1.35rem; padding: 1.05rem; }
}

/* Slice 55 follow-up: restore the approved first welcome mockup more faithfully. */
body[data-mobile-view="welcome"] .mobile-ia-layout {
  max-width: 470px;
  padding-inline: 1rem;
}
body[data-mobile-view="welcome"] .mobile-app-header {
  padding-top: clamp(1.2rem, 4vh, 2.2rem);
  padding-bottom: .15rem;
}
body[data-mobile-view="welcome"] .sanbian-logo {
  width: min(20.2rem, 74vw);
}
body[data-mobile-view="welcome"] .mobile-welcome {
  gap: 1.05rem;
  padding-top: .15rem;
}
body[data-mobile-view="welcome"] .welcome-hero-copy {
  gap: .55rem;
  margin-top: clamp(.35rem, 1.8vh, 1rem);
  margin-bottom: .25rem;
}
body[data-mobile-view="welcome"] .welcome-hero-copy h2 {
  max-width: 8.6em;
  font-size: clamp(3.15rem, 10.8vw, 4.3rem);
  line-height: .98;
  color: #05184d;
}
body[data-mobile-view="welcome"] .welcome-hero-copy p {
  max-width: 17.5em;
  font-size: clamp(1.05rem, 3.6vw, 1.36rem);
  color: #4b5f82;
}
body[data-mobile-view="welcome"] .welcome-track-grid {
  gap: .95rem;
}
body[data-mobile-view="welcome"] .welcome-track-card {
  padding: 1.18rem 1.08rem 1.08rem;
  border-radius: 1.55rem;
  border-color: rgba(191, 219, 254, .95);
  box-shadow:
    0 20px 44px rgba(30, 64, 175, .13),
    0 4px 12px rgba(30, 64, 175, .05),
    inset 0 1px 0 rgba(255, 255, 255, .86);
}
body[data-mobile-view="welcome"] .welcome-card-main {
  grid-template-columns: 5.35rem 1fr;
  gap: .95rem;
}
body[data-mobile-view="welcome"] .welcome-card-icon {
  width: 5.35rem;
  height: 5.35rem;
  background-color: #edf5ff;
  background-repeat: no-repeat;
  background-position: center;
  background-size: 62%;
  color: transparent;
}
body[data-mobile-view="welcome"] .welcome-card-icon.business-icon {
  background-image: url("data:image/svg+xml,%3Csvg width='96' height='96' viewBox='0 0 96 96' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M18 38h40a8 8 0 0 1 8 8v28a6 6 0 0 1-6 6H18a6 6 0 0 1-6-6V44a6 6 0 0 1 6-6Z' stroke='%23165bdd' stroke-width='6' stroke-linejoin='round'/%3E%3Cpath d='M30 38v-8a6 6 0 0 1 6-6h18a6 6 0 0 1 6 6v8' stroke='%23165bdd' stroke-width='6' stroke-linecap='round'/%3E%3Cpath d='M12 52h54' stroke='%23165bdd' stroke-width='6' stroke-linecap='round'/%3E%3Cpath d='M39 52v12h12V52' stroke='%23165bdd' stroke-width='6' stroke-linejoin='round'/%3E%3Cpath d='M67 67a15 15 0 0 1 30 0v6a7 7 0 0 1-7 7h-4V64h4' stroke='%23165bdd' stroke-width='6' stroke-linecap='round' stroke-linejoin='round'/%3E%3Cpath d='M67 64h-4v16h4a7 7 0 0 0 7-7v-6' stroke='%23165bdd' stroke-width='6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
}
body[data-mobile-view="welcome"] .welcome-card-icon.ielts-icon {
  background-image: url("data:image/svg+xml,%3Csvg width='96' height='96' viewBox='0 0 96 96' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M16 22h24a12 12 0 0 1 12 12v44a12 12 0 0 0-12-12H16V22Z' stroke='%23165bdd' stroke-width='6' stroke-linejoin='round'/%3E%3Cpath d='M80 22H56a12 12 0 0 0-12 12v44a12 12 0 0 1 12-12h24V22Z' stroke='%23165bdd' stroke-width='6' stroke-linejoin='round'/%3E%3Cpath d='M25 36h14M25 49h14M57 36h14M57 49h14' stroke='%23165bdd' stroke-width='6' stroke-linecap='round'/%3E%3Cpath d='m58 72 17-17 10 10-17 17-13 3 3-13Z' fill='%23edf5ff' stroke='%23165bdd' stroke-width='6' stroke-linejoin='round'/%3E%3C/svg%3E");
}
body[data-mobile-view="welcome"] .welcome-track-card h3 {
  font-size: clamp(1.62rem, 5vw, 1.9rem);
  color: #061950;
}
body[data-mobile-view="welcome"] .welcome-track-card p {
  font-size: clamp(.98rem, 3.3vw, 1.12rem);
}
body[data-mobile-view="welcome"] .welcome-track-card button:not(.secondary) {
  min-height: 3.65rem;
  border-radius: .92rem;
  font-size: clamp(1rem, 3.7vw, 1.22rem);
  background: linear-gradient(135deg, #1264f1, #0754da);
}
body[data-mobile-view="welcome"] .voice-coming-later {
  margin-top: .15rem;
  font-size: .98rem;
}
body[data-mobile-view="welcome"] .welcome-secondary-actions {
  margin-top: .45rem;
}
body[data-mobile-view="welcome"] .welcome-secondary-actions .subtle-link {
  display: none;
}
body[data-mobile-view="welcome"] .welcome-secondary-actions .more-tools-link {
  min-height: 3rem;
  padding-inline: 1rem;
  font-size: 1.12rem;
}
body[data-mobile-view="welcome"] .welcome-secondary-actions .more-tools-link::before {
  content: '▦';
  margin-right: .55rem;
  font-size: 1.15rem;
}
@media (max-height: 760px) and (min-width: 700px) {
  body[data-mobile-view="welcome"] .mobile-ia-layout { max-width: 430px; }
  body[data-mobile-view="welcome"] .sanbian-logo { width: 17.5rem; }
  body[data-mobile-view="welcome"] .welcome-hero-copy h2 { font-size: 3.2rem; }
  body[data-mobile-view="welcome"] .welcome-hero-copy p { font-size: 1.05rem; }
  body[data-mobile-view="welcome"] .welcome-track-card { padding: .95rem; border-radius: 1.25rem; }
  body[data-mobile-view="welcome"] .welcome-card-main { grid-template-columns: 4.6rem 1fr; }
  body[data-mobile-view="welcome"] .welcome-card-icon { width: 4.6rem; height: 4.6rem; }
  body[data-mobile-view="welcome"] .welcome-track-card button:not(.secondary) { min-height: 3.2rem; }
}

/* Slice 55 logo alignment fix: center the Sanbian logo on the welcome page. */
body[data-mobile-view="welcome"] .mobile-app-header {
  display: flex;
  justify-content: center;
}
body[data-mobile-view="welcome"] .brand-lockup {
  width: 100%;
  justify-content: center;
  align-items: center;
}
body[data-mobile-view="welcome"] .sanbian-logo {
  margin-inline: auto;
}


/* Slice 55 follow-up: tighten welcome vertical rhythm so both entry cards read in the first viewport. */
body[data-mobile-view="welcome"] .mobile-app-header {
  padding-top: clamp(.85rem, 2.6vh, 1.55rem);
}
body[data-mobile-view="welcome"] .mobile-welcome {
  gap: .82rem;
}
body[data-mobile-view="welcome"] .welcome-hero-copy {
  margin-top: clamp(.12rem, 1vh, .55rem);
  margin-bottom: .05rem;
  gap: .42rem;
}
body[data-mobile-view="welcome"] .welcome-hero-copy h2 {
  font-size: clamp(2.82rem, 10.2vw, 3.92rem);
}
body[data-mobile-view="welcome"] .welcome-hero-copy p {
  font-size: clamp(1rem, 3.25vw, 1.24rem);
}
body[data-mobile-view="welcome"] .welcome-track-grid {
  gap: .82rem;
}
body[data-mobile-view="welcome"] .welcome-track-card {
  gap: .78rem;
  padding: 1rem .98rem .98rem;
}
body[data-mobile-view="welcome"] .welcome-card-main {
  grid-template-columns: 4.85rem 1fr;
}
body[data-mobile-view="welcome"] .welcome-card-icon {
  width: 4.85rem;
  height: 4.85rem;
}
body[data-mobile-view="welcome"] .welcome-track-card button:not(.secondary) {
  min-height: 3.35rem;
}
body[data-mobile-view="welcome"] .voice-coming-later {
  margin-top: 0;
}
body[data-mobile-view="welcome"] .welcome-secondary-actions {
  margin-top: .22rem;
}

/* Slice 56: learner-facing page visual system after the Welcome screen. */
body:not([data-mobile-view="welcome"]) {
  min-height: 100vh;
  background:
    radial-gradient(circle at 50% -10%, rgba(219, 234, 254, .82), transparent 22rem),
    linear-gradient(180deg, #f8fbff 0%, #ffffff 34%, #eef6ff 100%);
}
body:not([data-mobile-view="welcome"]) .mobile-ia-layout {
  max-width: 760px;
  padding-inline: 1rem;
  padding-top: .75rem;
}
body:not([data-mobile-view="welcome"]) .mobile-app-header {
  position: sticky;
  top: 0;
  z-index: 30;
  align-items: center;
  padding: .72rem 1rem;
  box-shadow: 0 10px 34px rgba(15, 23, 42, .06);
}
body:not([data-mobile-view="welcome"]) .brand-lockup {
  justify-content: flex-start;
}
body:not([data-mobile-view="welcome"]) .status {
  max-width: 22rem;
  border-radius: 999px;
  background: rgba(248, 251, 255, .92);
  color: #44577c;
  font-size: .88rem;
}
body:not([data-mobile-view="welcome"]) .mobile-primary-nav {
  border-color: rgba(191, 219, 254, .92);
  background: rgba(255, 255, 255, .9);
  box-shadow: 0 18px 44px rgba(37, 99, 235, .1);
}
body:not([data-mobile-view="welcome"]) .mobile-nav-button {
  font-weight: 800;
  letter-spacing: -.01em;
}
.track-hub,
.practice-library,
.review-hub,
.mobile-more-intro,
.practice-shell {
  border: 1px solid rgba(191, 219, 254, .9);
  border-radius: 1.55rem;
  background:
    radial-gradient(circle at 12% 0%, rgba(219, 234, 254, .62), transparent 13rem),
    rgba(255, 255, 255, .93);
  box-shadow:
    0 22px 55px rgba(30, 64, 175, .1),
    inset 0 1px 0 rgba(255, 255, 255, .86);
  overflow: hidden;
}
.track-hub,
.practice-library,
.review-hub,
.mobile-more-intro {
  padding: clamp(1rem, 3vw, 1.35rem);
}
.track-hub-header {
  position: relative;
  gap: .55rem;
  padding-bottom: .25rem;
}
.track-hub-header .track-chip {
  min-height: 2rem;
  padding-inline: .8rem;
  border-color: rgba(37, 99, 235, .28);
  background: rgba(239, 246, 255, .86);
  box-shadow: 0 8px 18px rgba(37, 99, 235, .08);
}
.track-hub-header h2,
.practice-library h2,
.review-hub h2,
.mobile-more-intro h2 {
  color: #061950;
  font-weight: 850;
  letter-spacing: -.055em;
  font-size: clamp(2rem, 7vw, 3.15rem);
  line-height: .98;
}
.track-hub-header p,
.practice-library .track-hub-header p,
.review-hub .track-hub-header p,
.mobile-more-intro p {
  max-width: 36rem;
  color: #526486;
  font-size: 1.02rem;
}
.module-card-grid {
  gap: .9rem;
}
.module-card {
  position: relative;
  min-height: 11rem;
  gap: .72rem;
  padding: 1rem;
  border-color: rgba(191, 219, 254, .88);
  border-radius: 1.25rem;
  background: linear-gradient(180deg, rgba(255,255,255,.97), rgba(248,251,255,.92));
  box-shadow:
    0 16px 32px rgba(37, 99, 235, .08),
    inset 0 1px 0 rgba(255, 255, 255, .9);
}
.module-card::before,
.library-panel::before,
.review-summary-grid article::before {
  content: '';
  width: 3.2rem;
  height: 3.2rem;
  border-radius: 50%;
  background:
    radial-gradient(circle at 35% 25%, rgba(255,255,255,.95), transparent 42%),
    linear-gradient(145deg, #eff6ff, #dbeafe);
  border: 1px solid rgba(191, 219, 254, .85);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.7);
}
.module-card h3 {
  color: #061950;
  font-size: 1.28rem;
  line-height: 1.1;
  letter-spacing: -.035em;
}
.module-card p {
  color: #526486;
  font-size: .96rem;
}
.module-card button,
.library-panel button,
.review-hub .button-row button {
  min-height: 3.1rem;
  border-radius: .9rem;
  box-shadow: 0 12px 22px rgba(22, 101, 238, .18);
}
.module-card button.secondary,
.library-panel button.secondary,
.review-hub .button-row button.secondary {
  box-shadow: none;
}
.module-card.locked {
  background: linear-gradient(180deg, rgba(255,255,255,.96), rgba(255,247,237,.9));
  border-color: rgba(251, 146, 60, .35);
}
.module-card.locked::before {
  background:
    radial-gradient(circle at 35% 25%, rgba(255,255,255,.95), transparent 42%),
    linear-gradient(145deg, #fff7ed, #fed7aa);
  border-color: rgba(251, 146, 60, .35);
}
.module-card.locked h3::after {
  color: #9a3412;
}
.business-hub .button-row,
.ielts-hub .button-row,
.practice-library > button.secondary {
  margin-top: .15rem;
}
.business-hub .button-row button,
.ielts-hub .button-row button,
.practice-library > button.secondary {
  width: auto;
  min-width: 10rem;
  border-radius: 999px;
}
.library-tabs {
  margin-top: .1rem;
  border-color: rgba(191, 219, 254, .9);
  background: rgba(239, 246, 255, .8);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.8);
}
.library-tab {
  color: #526486;
  font-weight: 800;
}
.library-tab.selected {
  color: #061950;
}
.library-panel-grid {
  gap: .85rem;
}
.library-panel {
  min-height: 11.2rem;
  gap: .68rem;
  padding: 1rem;
  border-color: rgba(191, 219, 254, .86);
  border-radius: 1.2rem;
  background: linear-gradient(180deg, rgba(255,255,255,.98), rgba(248,251,255,.94));
}
.library-panel h3 {
  color: #061950;
}
.library-panel p {
  color: #526486;
}
.practice-shell {
  padding: clamp(1rem, 3vw, 1.25rem);
}
.practice-shell-copy {
  text-align: left;
  padding: .15rem .1rem .65rem;
}
.practice-shell-copy .eyebrow {
  color: #1d4ed8;
}
.practice-shell-copy h2 {
  max-width: 10em;
  color: #061950;
  font-size: clamp(2.05rem, 7vw, 3.3rem);
  line-height: .98;
  letter-spacing: -.06em;
}
.practice-lead {
  max-width: 34rem;
  color: #526486;
  font-size: 1.03rem;
}
.business-mode-panel {
  border-color: rgba(191, 219, 254, .9);
  background: rgba(239, 246, 255, .76);
  border-radius: 1.2rem;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.82);
}
.business-mode-copy h4 {
  color: #061950;
}
.business-mode-button {
  border-color: rgba(191, 219, 254, .9);
  border-radius: 1rem;
}
.business-mode-button[aria-checked="true"] {
  background: #ffffff;
  border-color: rgba(37, 99, 235, .52);
  box-shadow: 0 12px 24px rgba(37, 99, 235, .12);
}
.practice-flow {
  gap: .85rem;
}
.practice-step {
  border-color: rgba(191, 219, 254, .88);
  border-radius: 1.22rem;
  background: linear-gradient(180deg, rgba(255,255,255,.98), rgba(248,251,255,.94));
  box-shadow: 0 14px 28px rgba(37, 99, 235, .07);
}
.practice-step h3 {
  color: #061950;
  letter-spacing: -.03em;
}
.practice-step .muted,
.practice-step label {
  color: #526486;
}
.practice-step textarea,
.practice-step select,
.practice-step input {
  border-color: rgba(191, 219, 254, .95);
  background: rgba(255, 255, 255, .98);
}
.practice-hint,
.practice-review-card {
  border-color: rgba(191, 219, 254, .88);
  background: rgba(239, 246, 255, .7);
}
.review-summary-grid {
  gap: .85rem;
}
.review-summary-grid article {
  position: relative;
  min-height: 9rem;
  gap: .55rem;
  border-color: rgba(191, 219, 254, .86);
  border-radius: 1.18rem;
  background: linear-gradient(180deg, rgba(255,255,255,.97), rgba(248,251,255,.94));
}
.review-summary-grid strong {
  color: #061950;
  font-weight: 900;
}
.review-summary-grid p {
  margin: 0;
}
.review-hub #mobileReviewSummaryText {
  margin: .15rem 0 0;
  border-radius: 1rem;
  padding: .9rem 1rem;
}
.mobile-review-filters,
.mobile-review-panels,
.mobile-review-list,
.mobile-review-card,
.mobile-panel-heading {
  display: grid;
  gap: .75rem;
}
.mobile-review-filters {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  padding: .35rem;
  border: 1px solid rgba(191, 219, 254, .86);
  border-radius: 1rem;
  background: rgba(239, 246, 255, .72);
}
.mobile-review-filters button {
  min-height: 2.75rem;
  border-radius: .8rem;
  background: transparent;
  color: #334155;
  border-color: transparent;
  box-shadow: none;
  font-weight: 850;
}
.mobile-review-filters button[aria-pressed="true"] {
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  color: #fff;
  box-shadow: 0 14px 28px rgba(37, 99, 235, .2);
}
.mobile-review-panels {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.mobile-review-panel {
  display: grid;
  align-content: start;
  gap: .85rem;
  padding: .9rem;
  border: 1px solid rgba(191, 219, 254, .86);
  border-radius: 1.15rem;
  background: linear-gradient(180deg, rgba(255,255,255,.97), rgba(248,251,255,.94));
  box-shadow: 0 14px 30px rgba(37, 99, 235, .07);
}
.mobile-panel-heading {
  gap: .4rem;
}
.mobile-panel-heading h3 {
  margin: 0;
  color: #061950;
  line-height: 1.12;
}
.mobile-review-list.muted {
  padding: .85rem;
  border: 1px dashed rgba(148, 163, 184, .55);
  border-radius: .95rem;
  background: rgba(248, 250, 252, .7);
}
.mobile-review-card {
  gap: .55rem;
  padding: .8rem;
  border: 1px solid rgba(191, 219, 254, .76);
  border-radius: .95rem;
  background: rgba(255, 255, 255, .82);
}
.mobile-review-card strong {
  color: #061950;
  line-height: 1.15;
}
.mobile-review-card p {
  margin: 0;
}
.mobile-review-meta {
  color: #2563eb;
  font-size: .82rem;
  font-weight: 800;
  letter-spacing: .02em;
  text-transform: uppercase;
}
.mobile-review-card .button-row {
  margin-top: .1rem;
}
.mobile-more-intro {
  background:
    radial-gradient(circle at 20% 0%, rgba(219, 234, 254, .75), transparent 14rem),
    linear-gradient(180deg, rgba(255,255,255,.97), rgba(248,251,255,.94));
}
.mobile-more-intro .eyebrow {
  color: #1d4ed8;
}
.more-boundary-strip {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-top: .35rem;
}
.more-boundary-strip span {
  display: inline-flex;
  align-items: center;
  min-height: 2rem;
  padding: .32rem .62rem;
  border: 1px solid rgba(37, 99, 235, .18);
  border-radius: 999px;
  background: rgba(239, 246, 255, .82);
  color: #1e3a8a;
  font-size: .82rem;
  font-weight: 850;
}
.mobile-more-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .85rem;
  margin-top: .25rem;
}
.mobile-more-card {
  display: grid;
  align-content: start;
  gap: .65rem;
  padding: .95rem;
  border: 1px solid rgba(191, 219, 254, .86);
  border-radius: 1.12rem;
  background: linear-gradient(180deg, rgba(255,255,255,.98), rgba(248,251,255,.94));
  box-shadow: 0 14px 30px rgba(37, 99, 235, .07);
}
.mobile-more-card.warning {
  border-color: rgba(251, 146, 60, .32);
  background: linear-gradient(180deg, rgba(255,255,255,.98), rgba(255,247,237,.93));
}
.mobile-more-card h3 {
  margin: 0;
  color: #061950;
  line-height: 1.1;
}
.mobile-more-card p {
  margin: 0;
  color: #526486;
}
.mobile-more-card button {
  min-height: 2.85rem;
  border-radius: .86rem;
}
.advanced-boundary-warning {
  border-color: rgba(251, 146, 60, .35);
  background:
    radial-gradient(circle at 5% 0%, rgba(254, 215, 170, .55), transparent 12rem),
    rgba(255, 251, 235, .74);
}
.advanced-boundary-warning h2 {
  color: #7c2d12;
}
.advanced-boundary-warning ul {
  margin: .35rem 0 0;
  padding-left: 1.1rem;
  color: #7c2d12;
}
body[data-mobile-view="more"] .advanced-workbench {
  border-radius: 1.35rem;
  border-color: rgba(191, 219, 254, .9);
  background: rgba(255,255,255,.93);
  box-shadow: 0 18px 44px rgba(37, 99, 235, .08);
}
body[data-mobile-view="more"] .advanced-workbench > summary {
  min-height: 4.3rem;
  padding: .75rem 1rem;
  border: 1px solid rgba(191, 219, 254, .88);
  background: linear-gradient(180deg, rgba(255,255,255,.98), rgba(239,246,255,.9));
}
body[data-mobile-view="more"] .advanced-workbench > summary h2 {
  color: #061950;
  font-size: 1.25rem;
}
body[data-mobile-view="more"] .summary-note {
  color: #526486;
}
@media (min-width: 760px) {
  .business-hub .module-card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .business-hub .module-card.locked {
    grid-column: 1 / -1;
  }
  .ielts-hub .module-card-grid,
  .library-panel-grid,
  .review-summary-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
@media (max-width: 760px) {
  body:not([data-mobile-view="welcome"]) .mobile-app-header {
    position: sticky;
    padding: .65rem .85rem;
  }
  body:not([data-mobile-view="welcome"]) .sanbian-logo {
    width: min(12rem, 48vw);
  }
  body:not([data-mobile-view="welcome"]) .mobile-app-header .status {
    display: none;
  }
  body:not([data-mobile-view="welcome"]) .mobile-ia-layout {
    padding-bottom: 5.7rem;
  }
  .track-hub,
  .practice-library,
  .review-hub,
  .mobile-more-intro,
  .practice-shell {
    border-radius: 1.35rem;
  }
  .module-card,
  .library-panel,
  .review-summary-grid article,
  .practice-step {
    border-radius: 1.12rem;
  }
  .mobile-review-filters,
  .mobile-review-panels,
  .mobile-more-grid {
    grid-template-columns: 1fr;
  }
}

/* Slice 57: make Practice Library a real mobile segmented choice screen. */
.practice-library .library-panel-grid {
  grid-template-columns: 1fr;
}
.practice-library .library-panel[hidden] {
  display: none !important;
}
.practice-library .library-panel {
  min-height: auto;
  gap: 1rem;
  padding: 1rem;
}
.practice-library .library-panel::before {
  display: none;
}
.library-panel-copy {
  display: grid;
  gap: .45rem;
}
.library-panel-copy h3 {
  color: #061950;
  font-size: clamp(1.25rem, 5vw, 1.7rem);
  letter-spacing: -.04em;
}
.library-starter-list {
  display: grid;
  gap: .72rem;
}
.library-starter-card {
  display: grid;
  gap: .48rem;
  padding: .88rem;
  border: 1px solid rgba(191, 219, 254, .86);
  border-radius: 1rem;
  background: rgba(255,255,255,.92);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.86);
}
.library-starter-card.selected {
  border-color: rgba(37, 99, 235, .55);
  background:
    radial-gradient(circle at 0% 0%, rgba(219, 234, 254, .74), transparent 12rem),
    #ffffff;
  box-shadow: 0 14px 28px rgba(37, 99, 235, .1);
}
.library-starter-card h4 {
  margin: 0;
  color: #061950;
  font-size: 1.02rem;
  line-height: 1.16;
  letter-spacing: -.025em;
}
.library-starter-card p {
  margin: 0;
  color: #526486;
  font-size: .94rem;
}
.library-starter-card .starter-safety,
.library-more-note {
  font-size: .86rem;
}
.library-starter-card button {
  justify-self: stretch;
  min-height: 2.75rem;
  border-radius: .85rem;
}
.library-starter-card .selected-starter {
  color: #1d4ed8;
  border-color: rgba(37, 99, 235, .34);
  background: rgba(239, 246, 255, .86);
}
.practice-library .practice-hint[data-state="ready"] {
  color: #0f6b42;
  border-color: rgba(34, 197, 94, .28);
  background: rgba(240, 253, 244, .76);
}
.practice-library .practice-hint[data-state="empty"] {
  color: #64748b;
}
.practice-library #practiceLibraryStart {
  min-height: 3.35rem;
  font-weight: 850;
}
.practice-library #practiceLibraryContinue:disabled {
  cursor: not-allowed;
  opacity: .58;
  box-shadow: none;
}
.library-footer-actions {
  justify-content: flex-start;
}
@media (min-width: 760px) {
  .practice-library .library-starter-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .practice-library .library-more-note {
    grid-column: 1 / -1;
  }
}
@media (max-width: 760px) {
  .practice-library .library-tabs {
    position: sticky;
    top: 4.15rem;
    z-index: 10;
  }
  .practice-library .library-starter-card {
    border-radius: .95rem;
  }
}

/* Slice 57 follow-up: keep mobile view headings clear of the sticky app header. */
body:not([data-mobile-view="welcome"]) .mobile-view,
body:not([data-mobile-view="welcome"]) .mobile-more-intro {
  scroll-margin-top: 5.35rem;
}
@media (max-width: 760px) {
  body:not([data-mobile-view="welcome"]) .mobile-view,
  body:not([data-mobile-view="welcome"]) .mobile-more-intro {
    scroll-margin-top: 4.85rem;
  }
}

/* Slice 58: Practice Session learner progress and next-step controls. */
.quick-flow-progress {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: .45rem;
  margin: .1rem 0 .85rem;
  padding: .42rem;
  border: 1px solid rgba(191, 219, 254, .88);
  border-radius: 1.1rem;
  background: rgba(239, 246, 255, .72);
  list-style: none;
}
.quick-flow-progress li {
  display: grid;
  justify-items: center;
  gap: .25rem;
  min-height: 3.35rem;
  padding: .42rem .25rem;
  border-radius: .85rem;
  color: #64748b;
  font-size: .78rem;
  font-weight: 820;
  text-align: center;
}
.quick-flow-progress li span {
  display: inline-grid;
  place-items: center;
  width: 1.35rem;
  height: 1.35rem;
  border-radius: 999px;
  background: rgba(148, 163, 184, .18);
  color: #64748b;
  font-size: .76rem;
}
.quick-flow-progress li[data-state="active"] {
  color: #0b55dd;
  background: #ffffff;
  box-shadow: 0 10px 24px rgba(37, 99, 235, .1);
}
.quick-flow-progress li[data-state="active"] span {
  background: linear-gradient(135deg, #3b82f6, #1d4ed8);
  color: #ffffff;
}
.quick-flow-progress li[data-state="done"] {
  color: #0f6b42;
  background: rgba(240, 253, 244, .9);
}
.quick-flow-progress li[data-state="done"] span {
  background: #16a34a;
  color: #ffffff;
}
.quick-flow-progress li[data-state="done"] span::before {
  content: '✓';
}
.quick-flow-progress li[data-state="done"] span {
  font-size: 0;
}
.practice-step .button-row button:disabled {
  cursor: not-allowed;
  opacity: .58;
  box-shadow: none;
}
.practice-step #quickWordCount[data-state="ready"] {
  color: #0f6b42;
  border-color: rgba(34, 197, 94, .28);
  background: rgba(240, 253, 244, .76);
}
@media (max-width: 420px) {
  .quick-flow-progress {
    gap: .32rem;
    padding: .35rem;
  }
  .quick-flow-progress li {
    min-height: 3rem;
    font-size: .72rem;
  }
}

.voice-rehearsal-panel {
  display: grid;
  gap: .72rem;
  margin: .25rem 0 .75rem;
  padding: .95rem;
  border: 1px solid rgba(37, 99, 235, .22);
  border-radius: 1.1rem;
  background:
    radial-gradient(circle at 12% 0%, rgba(219, 234, 254, .78), transparent 12rem),
    rgba(255, 255, 255, .96);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.86), 0 12px 24px rgba(37, 99, 235, .07);
}
.voice-rehearsal-panel[hidden] { display: none; }
.voice-rehearsal-copy {
  display: grid;
  gap: .35rem;
}
.voice-rehearsal-copy h4 {
  margin: 0;
  color: #061950;
  font-size: 1.12rem;
  letter-spacing: -.025em;
}
.voice-rehearsal-copy p,
.voice-safety-list {
  margin: 0;
  color: #526486;
}
.voice-safety-list {
  display: grid;
  gap: .28rem;
  padding-left: 1.1rem;
  font-size: .92rem;
}
.voice-recorder-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
  min-height: 3.1rem;
  padding: .72rem .82rem;
  border: 1px solid rgba(191, 219, 254, .9);
  border-radius: .95rem;
  background: rgba(239, 246, 255, .75);
}
.voice-recorder-strip strong {
  color: #061950;
  font-size: 1.35rem;
  letter-spacing: -.04em;
}
.voice-recorder-strip span {
  color: #526486;
  font-weight: 800;
  text-align: right;
}
.voice-rehearsal-panel audio {
  width: 100%;
  min-height: 44px;
}
.voice-rehearsal-panel[data-recording="true"] {
  border-color: rgba(239, 68, 68, .32);
  background:
    radial-gradient(circle at 12% 0%, rgba(254, 226, 226, .88), transparent 12rem),
    rgba(255, 255, 255, .96);
}
.voice-rehearsal-panel[data-recording="true"] .voice-recorder-strip {
  border-color: rgba(239, 68, 68, .28);
  background: rgba(254, 242, 242, .92);
}