:root {
  color-scheme: light;
  --page-bg: #f3f5f7;
  --surface: #ffffff;
  --surface-warm: #f7f3ed;
  --surface-muted: #f4f4f2;
  --brand: #173d6b;
  --brand-dark: #08172d;
  --brand-bright: #25588f;
  --brand-soft: #e7eef7;
  --bronze: #806047;
  --bronze-soft: #e9ded3;
  --ai: #46558d;
  --ai-soft: #edf0fa;
  --evidence: #267263;
  --evidence-soft: #e9f3ed;
  --warning: #a66b23;
  --warning-soft: #fbf1df;
  --danger: #a43c38;
  --text: #16243a;
  --text-2: #526176;
  --muted: #85827d;
  --line: #dedbd7;
  --line-strong: #cfc8c0;
  --shadow-sm: 0 6px 24px rgba(38, 29, 25, .06);
  --shadow-md: 0 18px 50px rgba(38, 29, 25, .1);
  --shadow-lg: 0 30px 90px rgba(38, 29, 25, .16);
  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 24px;
  --control-height: 44px;
  --touch-target: 44px;
  --duration-fast: 160ms;
  --duration-panel: 280ms;
  --focus-ring: 0 0 0 4px rgba(70, 85, 141, .14);
  --paper-grid: rgba(8, 23, 45, .045);
  --surface-glass: rgba(255, 255, 255, .88);
  --brand-on-dark: #f7f3ed;
  --accent-line: #c7a67a;
  --sidebar-width: 238px;
  --font-ui: "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
  --font-reading: "Source Han Serif SC", "Noto Serif CJK SC", "Songti SC", "STSong", serif;
  font-family: var(--font-ui);
  color: var(--text);
  background: var(--page-bg);
}

* { box-sizing: border-box; }
html { min-width: 320px; scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--page-bg);
  background-image:
    linear-gradient(rgba(8,23,45,.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(8,23,45,.025) 1px, transparent 1px);
  background-size: 72px 72px;
}
body, button, input, select, textarea { font: inherit; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button { color: inherit; }
h1, h2, h3, p, dl { margin-top: 0; }
h1 { margin-bottom: 0; font-size: clamp(34px, 4vw, 54px); line-height: 1.12; letter-spacing: -.04em; }
h2 { line-height: 1.25; letter-spacing: -.025em; }
h3 { line-height: 1.4; }
p { line-height: 1.78; }
::selection { color: #fff; background: var(--brand); }
:focus-visible { outline: 3px solid rgba(70, 85, 141, .34); outline-offset: 3px; }

@view-transition { navigation: auto; }
::view-transition-old(root) { animation: page-out .28s ease both; }
::view-transition-new(root) { animation: page-in .48s cubic-bezier(.2,.7,.2,1) both; }
@keyframes page-out { to { opacity: 0; transform: scale(.992); } }
@keyframes page-in { from { opacity: 0; transform: translateY(12px); } }
html.is-navigating .page { opacity: .72; transform: translateY(4px); transition: .18s ease; }

.app-shell { display: grid; grid-template-columns: var(--sidebar-width) minmax(0, 1fr); min-height: 100vh; }
.app-sidebar {
  position: fixed; inset: 0 auto 0 0; z-index: 30; display: flex; flex-direction: column;
  width: var(--sidebar-width); padding: 24px 18px 18px; color: rgba(255,255,255,.82);
  background:
    radial-gradient(circle at 16% 5%, rgba(63,109,166,.28), transparent 28%),
    linear-gradient(165deg, #0b1d36 0%, #0a1930 48%, #061226 100%);
  box-shadow: 12px 0 40px rgba(8, 23, 45, .14);
}
.brand-lockup { display: flex; align-items: center; gap: 12px; padding: 2px 8px 26px; color: #fff; }
.brand-seal { display: grid; place-items: center; width: 38px; height: 38px; border: 1px solid rgba(255,255,255,.34); border-radius: 50%; font-family: var(--font-reading); font-size: 20px; }
.brand-logo { width: 42px; height: 42px; flex: 0 0 auto; object-fit: contain; }
.brand-copy { display: grid; gap: 2px; }
.brand-copy strong { font-size: 14px; letter-spacing: .03em; white-space: nowrap; }
.brand-copy small { color: rgba(255,255,255,.54); font-size: 11px; letter-spacing: .2em; }
.side-nav { display: grid; flex: 1; align-content: start; gap: 5px; min-height: 0; overflow-y: auto; padding-right: 2px; scrollbar-width: thin; }
.nav-label { margin: 0 10px 9px; color: rgba(255,255,255,.36); font-size: 11px; font-weight: 700; letter-spacing: .18em; }
.side-nav a { display: flex; align-items: center; gap: 12px; min-height: 46px; padding: 0 12px; border-radius: 12px; color: rgba(255,255,255,.68); font-size: 14px; font-weight: 650; transition: .2s ease; }
.side-nav a:hover { color: #fff; background: rgba(255,255,255,.08); transform: translateX(2px); }
.side-nav a.is-active { color: #fff; background: rgba(255,255,255,.14); box-shadow: inset 3px 0 0 #74a7dc; }
.nav-icon { display: grid; place-items: center; width: 26px; height: 26px; border: 1px solid rgba(255,255,255,.16); border-radius: 8px; font-family: var(--font-reading); font-size: 13px; }
.nav-group { border-radius: 12px; }
.nav-group summary { display: grid; grid-template-columns: 26px minmax(0,1fr) auto; align-items: center; gap: 12px; min-height: 46px; padding: 0 12px; border-radius: 12px; color: rgba(255,255,255,.7); cursor: pointer; font-size: 14px; font-weight: 700; list-style: none; }
.nav-group summary::-webkit-details-marker { display: none; }
.nav-group summary:hover, .nav-group[open] > summary { color: #fff; background: rgba(255,255,255,.07); }
.nav-group summary i { font-style: normal; transition: transform .18s ease; }
.nav-group[open] summary i { transform: rotate(180deg); }
.nav-submenu { display: grid; gap: 2px; margin: 4px 0 8px 38px; padding-left: 10px; border-left: 1px solid rgba(255,255,255,.13); }
.side-nav .nav-submenu a { min-height: 34px; padding: 0 9px; font-size: 12px; }
.sidebar-profile { display: grid; grid-template-columns: 38px minmax(0, 1fr) auto; gap: 10px; align-items: center; margin-top: auto; padding: 14px 8px 0; border-top: 1px solid rgba(255,255,255,.1); }
.profile-avatar { display: grid; place-items: center; width: 36px; height: 36px; border-radius: 50%; color: #fff; background: rgba(255,255,255,.12); font-family: var(--font-reading); }
.sidebar-profile > span:nth-child(2) { display: grid; gap: 2px; }
.sidebar-profile strong { color: #fff; font-size: 13px; }
.sidebar-profile small { color: rgba(255,255,255,.46); font-size: 10px; }
.sidebar-profile form { margin: 0; }
.sidebar-profile button { padding: 6px; border: 0; background: none; color: rgba(255,255,255,.5); font-size: 12px; cursor: pointer; }
.sidebar-profile button:hover { color: #fff; }

.app-workspace { grid-column: 2; min-width: 0; }
.app-topbar { position: sticky; top: 0; z-index: 20; display: flex; justify-content: space-between; align-items: center; min-height: 72px; padding: 0 clamp(24px, 4vw, 56px); border-bottom: 1px solid rgba(8,23,45,.08); background: rgba(243,245,247,.88); backdrop-filter: blur(18px); }
.mobile-brand { display: none; }
.topbar-context { display: flex; align-items: center; gap: 10px; }
.topbar-context span { color: var(--muted); font-size: 12px; }
.topbar-context span::after { content: "/"; margin-left: 10px; color: var(--line-strong); }
.topbar-context strong { font-size: 14px; }
.topbar-actions { display: flex; align-items: center; gap: 10px; }
.system-status, .role-chip { display: inline-flex; align-items: center; gap: 7px; padding: 8px 11px; border: 1px solid var(--line); border-radius: 999px; background: rgba(255,255,255,.65); color: var(--text-2); font-size: 12px; }
.system-status i { width: 7px; height: 7px; border-radius: 50%; background: #4b9b6a; box-shadow: 0 0 0 4px rgba(75,155,106,.12); }
.role-chip { border-color: rgba(114,27,40,.16); color: var(--brand); background: var(--brand-soft); font-weight: 700; }
.mobile-nav { display: none; }

.page { width: min(1380px, calc(100% - clamp(40px, 7vw, 96px))); margin: 0 auto; padding: 42px 0 80px; }
.section { margin-top: 42px; }
.section.compact { margin-top: 0; }
.section-heading { margin-bottom: 20px; }
.section-heading h1, .section-heading h2 { margin: 0; }
.section-heading h2 { font-size: clamp(26px, 2.5vw, 34px); }
.split-heading { display: flex; justify-content: space-between; align-items: end; gap: 20px; }
.eyebrow { margin: 0 0 10px; color: var(--brand); font-size: 12px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.lead { max-width: 760px; margin: 20px 0 0; color: var(--text-2); font-size: 18px; line-height: 1.8; }
.small-lead { font-size: 15px; }
.breadcrumb { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 0 0 18px; color: var(--muted); font-size: 12px; }
.breadcrumb a:hover { color: var(--brand); }
.breadcrumb strong { color: var(--text-2); }
.section-tabs { position: sticky; top: 84px; z-index: 12; display: flex; flex-wrap: wrap; gap: 8px; margin: 20px 0 26px; padding: 8px; border: 1px solid rgba(222,219,215,.8); border-radius: 14px; background: rgba(255,255,255,.9); box-shadow: var(--shadow-sm); backdrop-filter: blur(14px); }
.section-tabs a { min-height: 38px; padding: 9px 16px; border-radius: 9px; color: var(--muted); font-size: 13px; font-weight: 750; }
.section-tabs a.is-active { color: #fff; background: var(--brand); box-shadow: 0 8px 20px rgba(114,27,40,.18); }
.pagination { display: flex; align-items: center; justify-content: space-between; gap: 18px; margin-top: 24px; padding: 15px 18px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
.pagination div { display: flex; align-items: center; gap: 10px; }
.pagination a { padding: 8px 12px; border: 1px solid var(--line); border-radius: 8px; color: var(--brand); background: #fff; font-weight: 750; }
.pagination strong { color: var(--text-2); }
.resource-entry-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 12px; }
.resource-entry-grid a { display: grid; gap: 7px; min-height: 108px; padding: 20px; border: 1px solid var(--line); border-radius: 16px; background: #fff; box-shadow: var(--shadow-sm); }
.resource-entry-grid a:hover { border-color: rgba(114,27,40,.28); transform: translateY(-2px); }
.resource-entry-grid strong { color: var(--brand); }
.resource-entry-grid span { color: var(--muted); font-size: 13px; }
.maintenance-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 18px; }
.preview-character-maintenance { margin-top: 18px; }
.preview-character-list { display: grid; gap: 10px; margin-top: 18px; }
.preview-character-row { display: grid; grid-template-columns: minmax(0,1fr) minmax(250px,.62fr); gap: 18px; align-items: end; padding: 18px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface-warm); }
.preview-character-row h4 { margin: 5px 0 6px; font-size: 16px; }
.preview-character-row p { margin: 0; }
.preview-character-status { color: var(--muted); font-size: 12px; }
.preview-character-form { display: grid; gap: 10px; }
.preview-character-form label { display: grid; gap: 7px; }
.preview-character-form label > span { color: var(--text-2); font-size: 12px; font-weight: 750; }
.preview-character-form select { width: 100%; min-width: 0; padding: 11px 12px; border: 1px solid var(--line-strong); border-radius: 9px; background: #fff; }
.preview-character-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.persona-card-grid { display: grid; gap: 12px; }
.persona-card { border: 1px solid var(--line); border-radius: 16px; background: #fff; box-shadow: var(--shadow-sm); overflow: hidden; }
.persona-card > summary { display: grid; grid-template-columns: 42px minmax(0,1fr) auto; align-items: center; gap: 12px; padding: 16px 18px; cursor: pointer; list-style: none; }
.persona-card > summary::-webkit-details-marker { display: none; }
.persona-card > summary h3, .persona-card > summary p { margin: 0; }
.persona-card > summary p { color: var(--muted); font-size: 12px; }
.persona-card > summary > span { color: var(--brand); font-size: 12px; font-weight: 750; }
.persona-avatar { display: grid; place-items: center; width: 40px; height: 40px; border-radius: 50%; color: #fff; background: var(--brand); font-family: var(--font-reading); }
.persona-card-form { display: grid; gap: 14px; padding: 18px; border-top: 1px solid var(--line); }
.persona-card-form label { display: grid; gap: 7px; }
.persona-card-form label > span { color: var(--text-2); font-size: 12px; font-weight: 750; }
.persona-card-form input, .persona-card-form select, .persona-card-form textarea { width: 100%; min-width: 0; padding: 11px 12px; border: 1px solid var(--line-strong); border-radius: 9px; background: #fff; }
.source-picker > p { color: var(--muted); font-size: 12px; }
.source-picker .checkbox-grid { max-height: 380px; overflow: auto; padding: 8px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface-warm); }
.danger-zone { border-color: rgba(164,60,56,.28); background: #fff8f7; }
.settings-model-page .modal-panel { width: 100%; max-height: none; overflow: visible; padding: 0; background: transparent; box-shadow: none; }
.error-state-page { display: grid; justify-items: start; min-height: 60vh; align-content: center; }
.error-code { color: var(--brand-soft); font-size: clamp(90px,18vw,220px); font-weight: 900; line-height: .8; }

.button { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 0 18px; border: 1px solid transparent; border-radius: 11px; font-weight: 750; cursor: pointer; transition: transform .18s ease, box-shadow .18s ease, background .18s ease; }
.button:hover { transform: translateY(-2px); }
.button.primary { color: #fff; background: linear-gradient(135deg, var(--brand-bright), var(--brand-dark)); box-shadow: 0 10px 24px rgba(114,27,40,.2); }
.button.secondary { border-color: var(--line-strong); background: rgba(255,255,255,.82); color: var(--brand); }
.button.danger { border-color: rgba(164,60,56,.22); background: #fff0ef; color: var(--danger); }
.mini-button { min-height: 36px; padding: 0 12px; font-size: 12px; }
.full-button { width: 100%; }
.actions, .heading-actions, .form-actions, .chat-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.actions { margin-top: 26px; }
.heading-actions, .form-actions, .chat-actions { justify-content: flex-end; }
.back-link { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 20px; color: var(--text-2); font-size: 13px; font-weight: 700; }
.back-link::before { content: "←"; color: var(--brand); }

.hero-carousel {
  position: relative; overflow: hidden; min-height: 470px; border-radius: var(--radius-lg);
  background-color: #08172d;
  background-image:
    linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: 72px 72px;
  box-shadow: var(--shadow-lg); view-transition-name: home-hero;
}
.hero-slides { position: absolute; inset: 0; }
.hero-slide { position: absolute; inset: 0; display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(260px, .55fr); align-items: center; padding: clamp(34px, 5vw, 64px) clamp(34px, 6vw, 72px) 84px; opacity: 0; visibility: hidden; transform: scale(1.02); transition: opacity .65s ease, transform 1s ease, visibility .65s; }
.hero-slide::before { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(5,17,35,.96) 0%, rgba(8,29,56,.85) 48%, rgba(8,23,45,.35) 76%, rgba(8,23,45,.2) 100%); z-index: 1; }
.hero-slide::after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(20,14,14,.5), transparent 52%); z-index: 1; }
.hero-slide.is-active { opacity: 1; visibility: visible; transform: scale(1); z-index: 2; }
.hero-slide-image { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.hero-slide-content { position: relative; z-index: 3; max-width: 700px; color: #fff; }
.hero-slide .eyebrow { color: #e6c8a6; }
.hero-slide h1 { max-width: 720px; font-size: clamp(40px, 4.35vw, 62px); }
.role-teacher .hero-slide h1 { max-width: 650px; font-size: clamp(38px, 4vw, 56px); }
.hero-slide p { max-width: 650px; margin: 20px 0 0; color: rgba(255,255,255,.76); font-size: 17px; line-height: 1.8; }
.hero-slide .button.secondary { border-color: rgba(255,255,255,.3); color: #fff; background: rgba(255,255,255,.1); backdrop-filter: blur(8px); }
.hero-fact { position: relative; z-index: 3; justify-self: end; align-self: end; min-width: 250px; padding: 22px; border: 1px solid rgba(255,255,255,.18); border-radius: 16px; color: #fff; background: rgba(25,18,18,.42); backdrop-filter: blur(14px); }
.hero-fact span { display: block; color: rgba(255,255,255,.54); font-size: 12px; }
.hero-fact strong { display: block; margin-top: 8px; font-size: 34px; }
.hero-controls { position: absolute; z-index: 5; left: clamp(34px, 6vw, 72px); right: clamp(34px, 6vw, 72px); bottom: 24px; display: flex; align-items: center; gap: 12px; }
.hero-controls button { display: grid; place-items: center; width: 36px; height: 36px; border: 1px solid rgba(255,255,255,.22); border-radius: 50%; color: #fff; background: rgba(22,15,15,.3); cursor: pointer; }
.hero-dots { display: flex; gap: 7px; }
.hero-dots button { width: 8px; height: 8px; border: 0; padding: 0; background: rgba(255,255,255,.34); }
.hero-dots button.is-active { width: 28px; border-radius: 99px; background: #fff; }
.hero-progress { position: absolute; left: 0; right: 0; bottom: 0; z-index: 6; height: 3px; transform: scaleX(0); transform-origin: left; background: #d3ad83; }
.hero-progress.is-running { animation: hero-progress 7.2s linear both; }
@keyframes hero-progress { to { transform: scaleX(1); } }

.dashboard-metrics, .learning-steps, .stats-grid { display: grid; gap: 14px; margin-top: 18px; }
.dashboard-metrics { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.learning-steps { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.stats-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.metric-tile, .step-card, .stat-card { position: relative; overflow: hidden; min-height: 154px; padding: 22px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow-sm); transition: .22s ease; }
.metric-tile:hover, .step-card:hover, .stat-card:hover { transform: translateY(-4px); border-color: rgba(114,27,40,.25); box-shadow: var(--shadow-md); }
.metric-tile span, .step-card span, .stat-card span { color: var(--brand); font-size: 12px; font-weight: 800; letter-spacing: .06em; }
.metric-tile strong, .stat-card strong { display: block; margin: 14px 0 4px; color: var(--brand); font-size: 38px; letter-spacing: -.04em; }
.metric-tile small, .step-card small, .stat-card p { color: var(--text-2); font-size: 12px; line-height: 1.6; }
.metric-tile.urgent { background: linear-gradient(145deg, #fff, var(--brand-soft)); }
.step-card strong { display: block; margin: 14px 0 7px; font-size: 20px; }
.step-card::after { content: "→"; position: absolute; right: 18px; top: 18px; color: var(--line-strong); transition: .2s ease; }
.step-card:hover::after { color: var(--brand); transform: translateX(3px); }

.teacher-home-layout, .student-home-layout { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(300px, .55fr); gap: 22px; margin-top: 42px; }
.dashboard-stack, .dashboard-side { min-width: 0; }
.dashboard-side { padding: 24px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow-sm); }
.compact-record-list, .quick-action-list, .student-stat-list, .topic-pulse-grid { display: grid; gap: 10px; }
.compact-record-row, .quick-action-list a, .student-stat-list a, .topic-pulse-card { padding: 17px 18px; border: 1px solid var(--line); border-radius: 13px; background: var(--surface); transition: .2s ease; }
.compact-record-row:hover, .quick-action-list a:hover, .student-stat-list a:hover, .topic-pulse-card:hover { transform: translateX(4px); border-color: rgba(114,27,40,.24); box-shadow: var(--shadow-sm); }
.compact-record-row { display: grid; gap: 5px; }
.compact-record-row span, .topic-pulse-card > span { color: var(--brand); font-size: 12px; font-weight: 800; }
.compact-record-row strong { line-height: 1.5; }
.compact-record-row small, .quick-action-list span { color: var(--muted); font-size: 12px; line-height: 1.55; }
.quick-action-list a { display: grid; gap: 5px; }
.quick-action-list strong { color: var(--text); font-size: 15px; }
.student-stat-list a { display: flex; align-items: center; justify-content: space-between; }
.student-stat-list span { color: var(--text-2); }
.student-stat-list strong { color: var(--brand); font-size: 28px; }
.topic-pulse-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.topic-pulse-card { display: grid; gap: 8px; }
.topic-pulse-card > strong { font-size: 17px; }
.topic-focus-panel, .dialogue-preview { padding: clamp(24px, 4vw, 38px); border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow-sm); }
.topic-focus-panel > span { color: var(--brand); font-size: 12px; font-weight: 800; }
.topic-focus-panel h2 { margin: 12px 0; font-size: 30px; }
.topic-focus-panel p { color: var(--text-2); }
.topic-character-line { margin-top: 22px; padding: 16px 18px; border-left: 3px solid var(--brand); background: var(--surface-warm); }
.topic-character-line { display: grid; gap: 4px; }
.topic-character-line small { color: var(--text-2); line-height: 1.6; }
.dashboard-empty { min-height: 180px; }

.hero-panel, .info-block, .form-panel, .empty-state, .chapter-card, .source-row, .entry-card, .role-card, .login-card, .record-row, .topic-stat-row, .export-record-row, .export-log-row, .chat-card, .model-panel, .workspace-panel, .voice-mode-card, .voice-status-card, .voice-transcripts, .voice-empty-session, .voice-evidence-card, .voice-wave-card { border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow-sm); }

.course-band, .workspace-panel { overflow: hidden; display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(280px, .6fr); }
.course-band img, .workspace-panel img { width: 100%; height: 100%; min-height: 250px; object-fit: cover; order: 2; }
.course-band-body, .workspace-panel-content { padding: clamp(26px, 4vw, 48px); }
.volume-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.volume-card { display: grid; gap: 9px; min-height: 120px; padding: 18px; border: 1px solid var(--line); border-radius: 13px; background: var(--surface-warm); transition: .2s ease; }
.volume-card:hover { transform: translateY(-3px); border-color: rgba(114,27,40,.24); }
.volume-card span { color: var(--brand); font-size: 12px; font-weight: 800; }
.volume-card strong { font-size: 21px; }
.volume-card small { color: var(--text-2); line-height: 1.5; }

.volume-stack { display: grid; gap: 44px; }
.volume-section { scroll-margin-top: 100px; }
.volume-title { display: flex; align-items: baseline; justify-content: space-between; gap: 20px; margin-bottom: 16px; padding-bottom: 12px; border-bottom: 1px solid var(--line-strong); }
.volume-title h2 { margin: 0; font-size: 30px; }
.volume-title span { color: var(--muted); font-size: 13px; }
.chapter-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.chapter-card { position: relative; overflow: hidden; display: block; min-height: 238px; padding: 26px; transition: .25s ease; view-transition-name: topic-card; }
.chapter-card::after { content: ""; position: absolute; inset: auto -40px -60px auto; width: 150px; height: 150px; border: 1px solid rgba(114,27,40,.1); border-radius: 50%; box-shadow: 0 0 0 28px rgba(114,27,40,.025); }
.chapter-card:hover { transform: translateY(-5px); border-color: rgba(114,27,40,.26); box-shadow: var(--shadow-md); }
.chapter-no, .source-count, .source-row span, .record-row span, .export-log-row span { color: var(--brand); font-size: 12px; font-weight: 800; }
.chapter-card h3 { max-width: 90%; margin: 18px 0 12px; font-size: 23px; }
.chapter-card p, .source-row p, .record-row p, .info-block p, .empty-state p, .topic-stat-row p { color: var(--text-2); }
.source-count { display: inline-flex; margin-top: 8px; }

.detail-layout { display: grid; grid-template-columns: minmax(260px, .56fr) minmax(0, 1.44fr); gap: clamp(26px, 5vw, 64px); align-items: start; }
.detail-meta { position: sticky; top: 112px; }
.detail-meta h1 { font-size: clamp(36px, 4vw, 50px); view-transition-name: topic-title; }
.detail-main { display: grid; gap: 14px; }
.info-block { padding: clamp(22px, 3vw, 32px); }
.info-block h2 { margin: 0 0 12px; font-size: 20px; }
.info-block > p:last-child { margin-bottom: 0; }
.source-list { display: grid; gap: 10px; }
.source-row { display: block; padding: 18px; transition: .2s ease; }
.source-row:hover { transform: translateX(4px); border-color: rgba(50,98,74,.28); box-shadow: var(--shadow-sm); }
.source-row strong { display: block; margin: 8px 0 6px; font-size: 18px; }
.two-column-info { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }

.record-list { display: grid; gap: 12px; }
.record-row { display: grid; grid-template-columns: minmax(0, 1fr) minmax(280px, .42fr); gap: 22px; padding: 22px; transition: .2s ease; }
.record-row:hover { transform: translateY(-3px); border-color: rgba(114,27,40,.24); box-shadow: var(--shadow-md); }
.record-row h2 { margin: 10px 0 8px; font-size: 20px; }
.record-meta, .mini-metrics, .settings-list, .metrics { display: grid; gap: 9px; margin: 0; }
.record-meta { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.record-meta div, .mini-metrics div, .settings-list div, .model-stat, .verify-preview, .rag-panel { padding: 13px; border: 1px solid var(--line); border-radius: 11px; background: var(--surface-warm); }
.record-meta dt, .mini-metrics dt, .settings-list dt { color: var(--muted); font-size: 11px; }
.record-meta dd, .mini-metrics dd, .settings-list dd { margin: 5px 0 0; font-weight: 750; line-break: anywhere; }
.mini-metrics { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.teacher-dashboard { margin-bottom: 16px; }
.review-tabs { display: flex; gap: 10px; }
.review-tabs span { padding: 10px 13px; border-radius: 999px; background: var(--surface); color: var(--text-2); font-size: 12px; }
.detail-review-layout { grid-template-columns: minmax(0, 1fr) minmax(310px, .42fr); }
.review-panel { position: sticky; top: 94px; display: grid; gap: 14px; }

.form-panel { display: grid; gap: 18px; padding: clamp(24px, 4vw, 34px); }
.form-panel h2 { margin-bottom: 2px; }
.form-panel label, .form-panel fieldset { display: grid; gap: 8px; }
.form-panel label > span, .form-panel legend { font-size: 13px; font-weight: 750; }
.form-panel input, .form-panel select, .form-panel textarea { width: 100%; border: 1px solid var(--line-strong); border-radius: 11px; background: #fff; color: var(--text); transition: .18s ease; }
.form-panel input, .form-panel select { min-height: 48px; padding: 0 14px; }
.form-panel textarea { padding: 13px 14px; resize: vertical; line-height: 1.65; }
.form-panel input:focus, .form-panel select:focus, .form-panel textarea:focus { outline: 0; border-color: var(--ai); box-shadow: 0 0 0 4px rgba(70,85,141,.1); }
.form-panel fieldset { padding: 16px; border: 1px solid var(--line); border-radius: 12px; }
.checkbox-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.check-row { display: grid !important; grid-template-columns: 18px minmax(0, 1fr); align-items: start; gap: 9px !important; padding: 11px; border-radius: 9px; background: var(--surface-warm); }
.check-row input { min-height: 0; margin-top: 3px; }
.check-row span { color: var(--text-2); font-weight: 500 !important; line-height: 1.55; }
.selector-panel { padding: 18px; }

.chat-page-shell { display: grid; grid-template-columns: 250px minmax(420px, 1fr) 280px; gap: 16px; align-items: start; margin-top: 20px; }
.chat-sidebar, .evidence-sidebar { position: sticky; top: 92px; display: grid; gap: 12px; }
.chat-card, .model-panel { display: grid; gap: 14px; padding: 20px; }
.chat-card-title { display: flex; justify-content: space-between; align-items: center; gap: 14px; padding-bottom: 12px; border-bottom: 1px solid var(--line); }
.chat-card-title h2 { margin: 0; }
.chat-card-title span { color: var(--evidence); font-size: 12px; font-weight: 700; }
.message-row { display: grid; gap: 7px; }
.message-row span { color: var(--brand); font-size: 11px; font-weight: 800; }
.message-row p, .verify-preview p, .rag-panel p, .rag-item p { margin: 0; color: var(--text-2); line-height: 1.75; }
.student-message { justify-self: end; max-width: 84%; padding: 15px 17px; border: 1px solid #ddd3c7; border-radius: 16px 16px 4px 16px; background: #fbf5ea; }
.ai-message { max-width: 94%; padding: 17px 19px; border: 1px solid #d8dce9; border-radius: 16px 16px 16px 4px; background: #f7f8fc; }
.voice-controls, .asr-controls { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.voice-controls small, .asr-controls span { color: var(--muted); font-size: 11px; }
.asr-controls { padding: 11px; border: 1px dashed var(--line-strong); border-radius: 10px; }
.message-form { position: sticky; bottom: 12px; z-index: 4; padding: 16px; background: rgba(255,255,255,.94); backdrop-filter: blur(14px); box-shadow: 0 16px 50px rgba(38,29,25,.14); }
.compact-form { gap: 13px; }
.start-chat-action { justify-content: flex-start; }
.verify-preview { display: grid; gap: 6px; }
.verify-preview strong, .rag-panel strong { color: var(--brand); font-size: 12px; }
.rag-list { display: grid; gap: 8px; }
.rag-item { display: grid; gap: 5px; padding: 11px; border-left: 3px solid var(--evidence); background: var(--evidence-soft); }
.rag-item span { color: var(--evidence); font-size: 11px; font-weight: 800; }
.model-panel h2 { margin: 0; }
.model-stat { display: grid; gap: 5px; }
.model-stat span { color: var(--muted); font-size: 11px; font-weight: 700; }
.model-stat p, .model-stat strong { margin: 0; line-break: anywhere; }
.ai-config-panel { display: grid; gap: 8px; padding: 14px; border: 1px solid var(--line); border-radius: 11px; background: var(--surface-warm); }
.ai-config-panel span, .ai-config-panel small { color: var(--muted); font-size: 11px; }
.ai-config-panel p { margin: 0; color: var(--text-2); line-break: anywhere; }
.interaction-badge { display: inline-flex; justify-self: start; padding: 4px 8px; border-radius: 999px; font-size: 10px; }
.interaction-badge.verified { color: var(--evidence); background: var(--evidence-soft); }
.interaction-badge.experimental { color: var(--warning); background: var(--warning-soft); }

/* Redesigned two-column conversation studio */
.chat-page-heading { margin-bottom: 22px; }
.chat-page-heading .lead { max-width: 690px; }
.chat-studio { display: grid; grid-template-columns: minmax(300px, 360px) minmax(0, 1fr); gap: 22px; align-items: start; }
.character-studio { position: sticky; top: 92px; display: grid; gap: 12px; min-width: 0; }
.character-visual-card { position: relative; overflow: hidden; min-height: 250px; border-radius: var(--radius); background: #281719; box-shadow: var(--shadow-md); }
.character-scene-image { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.character-visual-shade { position: absolute; inset: 0; background: linear-gradient(0deg, rgba(28,16,17,.94), rgba(35,19,20,.15) 70%); }
.character-identity { position: absolute; z-index: 2; left: 22px; right: 22px; bottom: 20px; color: #fff; }
.character-identity span { color: #e1bd92; font-size: 11px; font-weight: 750; }
.character-identity h2 { margin: 8px 0 6px; font-size: 30px; }
.character-identity p { display: -webkit-box; overflow: hidden; margin: 0; color: rgba(255,255,255,.7); font-size: 12px; line-height: 1.55; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.character-selector { grid-template-columns: 1fr; padding: 16px; }
.character-selector label { gap: 6px; }
.character-selector input, .character-selector select { min-height: 42px; }
.character-model-shell { padding: 14px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow-sm); }
.character-model-shell .character-3d-heading { margin-bottom: 8px; }
.character-model-shell .character-3d-stage, .character-model-shell .character-3d-stage canvas { min-height: 310px; height: 310px; }
.character-question-card { padding: 18px; border-left: 3px solid var(--brand); border-radius: 4px var(--radius-sm) var(--radius-sm) 4px; background: var(--surface-warm); }
.character-question-card span { color: var(--brand); font-size: 11px; font-weight: 800; }
.character-question-card p { margin: 8px 0 0; color: var(--text-2); font-size: 13px; line-height: 1.7; }
.feature-jump-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.feature-jump-grid a { position: relative; display: grid; gap: 4px; min-height: 108px; padding: 14px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); transition: .2s ease; }
.feature-jump-grid a:hover { transform: translateY(-3px); border-color: rgba(114,27,40,.24); box-shadow: var(--shadow-sm); }
.feature-jump-grid a > span { position: absolute; right: 12px; top: 11px; color: rgba(114,27,40,.24); font-family: var(--font-reading); font-size: 24px; }
.feature-jump-grid strong { margin-top: auto; font-size: 14px; }
.feature-jump-grid small { color: var(--muted); font-size: 10px; line-height: 1.45; }

.conversation-workspace { min-width: 0; padding: clamp(20px, 3vw, 32px); border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--surface); box-shadow: var(--shadow-sm); }
.conversation-header { display: flex; justify-content: space-between; align-items: center; gap: 18px; padding-bottom: 18px; border-bottom: 1px solid var(--line); }
.conversation-header .eyebrow { margin-bottom: 6px; }
.conversation-header h2 { margin: 0; font-size: 25px; }
.conversation-ready { display: inline-flex; align-items: center; gap: 7px; padding: 8px 11px; border-radius: 999px; color: var(--evidence); background: var(--evidence-soft); font-size: 11px; font-weight: 750; white-space: nowrap; }
.conversation-ready i { width: 7px; height: 7px; border-radius: 50%; background: var(--evidence); }
.conversation-guidance { display: grid; gap: 5px; margin: 18px 0; padding: 14px 16px; border-left: 3px solid var(--bronze); background: var(--surface-warm); }
.conversation-guidance strong { color: var(--brand); font-size: 11px; }
.conversation-guidance p { margin: 0; color: var(--text-2); font-size: 13px; line-height: 1.7; }
.conversation-empty { display: grid; place-items: center; min-height: 360px; padding: 44px; text-align: center; }
.conversation-empty-mark { display: grid; place-items: center; width: 58px; height: 58px; border: 1px solid rgba(114,27,40,.22); border-radius: 50%; color: var(--brand); background: var(--brand-soft); font-family: var(--font-reading); font-size: 25px; }
.conversation-empty h2 { margin: 18px 0 8px; }
.conversation-empty p { max-width: 500px; margin-bottom: 22px; color: var(--text-2); }
.conversation-empty.compact-empty { min-height: 200px; }
.conversation-stream { display: grid; gap: 24px; max-height: min(64vh, 720px); overflow-y: auto; padding: 4px 6px 22px 0; scrollbar-color: var(--line-strong) transparent; }
.dialogue-turn { display: grid; gap: 12px; padding-bottom: 22px; border-bottom: 1px solid var(--line); }
.dialogue-turn:last-child { border-bottom: 0; }
.dialogue-turn .student-message { max-width: min(78%, 620px); }
.dialogue-turn .ai-message { max-width: min(94%, 760px); }
.message-tools { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-top: 6px; padding-top: 10px; border-top: 1px solid #dde1ea; }
.text-button { padding: 0; border: 0; color: var(--brand); background: none; font-size: 12px; font-weight: 750; cursor: pointer; }
.text-button:hover { text-decoration: underline; }
.redesigned-message-form { margin-top: 18px; }
.message-submit-row { display: flex; justify-content: space-between; align-items: center; gap: 14px; }
.message-submit-row .asr-controls { flex: 1; }
.prompt-suggestions { display: grid; gap: 14px; margin-top: 18px; padding: 20px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface-warm); }
.prompt-suggestion-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.prompt-suggestion-grid article { display: grid; gap: 8px; padding: 14px; border-radius: 11px; background: #fff; }
.prompt-suggestion-grid article > span { color: var(--brand); font-size: 10px; font-weight: 800; }
.prompt-suggestion-grid p { display: -webkit-box; overflow: hidden; margin: 0; color: var(--text-2); font-size: 12px; line-height: 1.6; -webkit-line-clamp: 3; -webkit-box-orient: vertical; }

.evidence-drawer { position: fixed; inset: 0; z-index: 100; visibility: hidden; pointer-events: none; }
.evidence-drawer.is-open { visibility: visible; pointer-events: auto; }
.drawer-backdrop { position: absolute; inset: 0; border: 0; background: rgba(29,20,19,.48); opacity: 0; backdrop-filter: blur(5px); transition: opacity .3s ease; }
.evidence-drawer.is-open .drawer-backdrop { opacity: 1; }
.drawer-panel { position: absolute; top: 0; right: 0; bottom: 0; width: min(520px, 92vw); overflow-y: auto; padding: 28px; background: var(--surface); box-shadow: -24px 0 70px rgba(31,21,20,.18); transform: translateX(102%); transition: transform .42s cubic-bezier(.2,.7,.2,1); }
.evidence-drawer.is-open .drawer-panel { transform: translateX(0); }
.drawer-header { position: sticky; top: -28px; z-index: 3; display: flex; justify-content: space-between; align-items: center; gap: 16px; margin: -28px -28px 20px; padding: 24px 28px 18px; border-bottom: 1px solid var(--line); background: rgba(255,255,255,.94); backdrop-filter: blur(14px); }
.drawer-header .eyebrow { margin-bottom: 5px; }
.drawer-header h2 { margin: 0; }
.drawer-close { display: grid; place-items: center; width: 38px; height: 38px; border: 1px solid var(--line); border-radius: 50%; background: #fff; font-size: 24px; cursor: pointer; }
.drawer-summary { display: grid; gap: 7px; margin-bottom: 18px; padding: 18px; border-radius: 13px; color: #fff; background: linear-gradient(140deg, var(--brand), var(--brand-dark)); }
.drawer-summary span { color: #e1bd92; font-size: 10px; font-weight: 800; }
.drawer-summary p { margin: 0; color: rgba(255,255,255,.7); font-size: 12px; }
.drawer-evidence-list { display: grid; gap: 14px; }
.drawer-evidence-item { display: grid; gap: 12px; padding: 18px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.drawer-question { color: var(--text); font-size: 13px; font-weight: 750; line-height: 1.6; }
.drawer-actions { display: flex; justify-content: flex-end; }
.drawer-empty { padding: 28px; border: 1px dashed var(--line-strong); border-radius: var(--radius); text-align: center; }
.drawer-empty p { margin-bottom: 0; color: var(--text-2); }
.drawer-link-list { display: grid; gap: 8px; margin-top: 18px; padding-top: 18px; border-top: 1px solid var(--line); }
.drawer-link-list a { display: flex; justify-content: space-between; gap: 14px; padding: 14px; border-radius: 10px; background: var(--surface-warm); }
.drawer-link-list a span { color: var(--brand); }
body.has-open-drawer { overflow: hidden; }

.character-3d-panel { display: grid; gap: 10px; }
.character-3d-heading { display: flex; justify-content: space-between; gap: 8px; }
.character-3d-heading h2 { font-size: 16px; }
.character-3d-heading span { color: var(--muted); font-size: 10px; }
.character-3d-stage { position: relative; overflow: hidden; min-height: 260px; border: 1px solid var(--line); border-radius: 13px; background: radial-gradient(circle at 50% 36%, #fff 0%, #ede8e0 100%); }
.character-3d-stage canvas { display: block; width: 100%; height: 260px; }
.character-3d-loading { position: absolute; left: 10px; right: 10px; bottom: 10px; padding: 8px; border-radius: 8px; background: rgba(255,255,255,.84); color: var(--text-2); font-size: 11px; text-align: center; backdrop-filter: blur(8px); }
.character-3d-empty { display: grid; place-content: center; min-height: 260px; padding: 18px; text-align: center; }
.character-3d-empty p { color: var(--muted); font-size: 12px; }
.character-3d-actions { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 4px; }
.character-3d-actions button { min-width: 0; min-height: 30px; padding: 0 4px; border: 1px solid var(--line); border-radius: 7px; background: #fff; font-size: 10px; cursor: pointer; }
.character-3d-actions button.is-active { color: var(--brand); border-color: var(--brand); background: var(--brand-soft); }

.voice-page-shell { display: grid; grid-template-columns: minmax(260px,.75fr) minmax(390px,1.3fr) minmax(260px,.7fr); gap: 16px; margin-top: 20px; }
.voice-character-column, .voice-evidence-column, .voice-console { display: grid; gap: 12px; }
.voice-character-column, .voice-evidence-column { position: sticky; top: 92px; }
.voice-stage-scene { position: relative; overflow: hidden; min-height: 190px; border-radius: var(--radius); box-shadow: var(--shadow-md); }
.voice-stage-scene::after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(26,16,17,.92), rgba(26,16,17,.08) 72%); }
.voice-stage-scene img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.voice-stage-scene div { position: absolute; z-index: 2; left: 18px; right: 18px; bottom: 16px; display: grid; gap: 4px; color: #fff; }
.voice-stage-scene span { color: #e1bd92; font-size: 10px; font-weight: 800; }
.voice-stage-scene strong { font-size: 22px; }
.voice-stage-scene small { color: rgba(255,255,255,.58); font-size: 10px; }
.voice-mode-card, .voice-status-card, .voice-transcripts, .voice-empty-session, .voice-evidence-card, .voice-wave-card { padding: 18px; }
.segmented-control { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); padding: 4px; border-radius: 12px; background: var(--surface-muted); }
.segmented-control button { min-height: 42px; border: 0; border-radius: 9px; background: transparent; font-weight: 750; cursor: pointer; }
.segmented-control button.is-active { color: #fff; background: var(--brand); box-shadow: 0 7px 20px rgba(114,27,40,.2); }
.voice-experimental, .omni-no-rag { padding: 11px; border-left: 3px solid var(--warning); border-radius: 8px; background: var(--warning-soft); color: #754b17; font-size: 12px; line-height: 1.6; }
.voice-status-card { display: flex; justify-content: space-between; align-items: center; gap: 14px; }
.voice-status-card > div { display: flex; align-items: center; gap: 9px; }
.voice-status-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--muted); box-shadow: 0 0 0 5px rgba(133,130,125,.1); }
.voice-status-dot[data-state="listening"], .voice-status-dot[data-state="connected"] { background: var(--evidence); }
.voice-status-dot[data-state="speaking"] { background: var(--brand); animation: pulse .9s infinite; }
@keyframes pulse { 50% { transform: scale(1.25); } }
.voice-controls-bar { display: grid; grid-template-columns: 1.2fr repeat(3,minmax(0,1fr)); gap: 8px; }
.voice-transcripts { display: grid; gap: 12px; min-height: 330px; }
.voice-transcripts article { padding: 15px; border-radius: 13px; }
.voice-transcripts article:first-child { margin-left: 8%; background: #fbf5ea; }
.voice-transcripts article:last-child { margin-right: 8%; background: var(--ai-soft); }
.voice-transcripts span, .voice-wave-heading span { color: var(--muted); font-size: 11px; font-weight: 750; }
.voice-transcripts p { margin: 6px 0 0; color: var(--text-2); white-space: pre-wrap; }
.voice-wave-heading { display: flex; justify-content: space-between; margin-bottom: 8px; }
.voice-wave-card canvas { display: block; width: 100%; height: 58px; }
.voice-evidence-card { display: grid; gap: 12px; }
.voice-evidence-card h2, .voice-empty-session h2 { margin: 0; font-size: 18px; }
.voice-evidence-help, .voice-safety-card p, .voice-empty-session p { margin: 0; color: var(--text-2); font-size: 12px; }
.voice-error { padding: 12px; border-radius: 10px; background: #fff0ef; color: var(--danger); }

.topic-stat-list, .export-record-list, .export-log-list { display: grid; gap: 10px; }
.topic-stat-row { display: grid; grid-template-columns: minmax(0,1fr) minmax(350px,.65fr); gap: 20px; align-items: center; padding: 20px; }
.topic-stat-row h3 { margin: 7px 0 0; }
.export-layout, .settings-layout { display: grid; grid-template-columns: minmax(0,1.2fr) minmax(300px,.55fr); gap: 18px; }
.export-layout > *, .settings-layout > * { min-width: 0; }
.export-record-row { display: grid; grid-template-columns: minmax(0,1fr) auto; gap: 16px; align-items: center; padding: 17px; }
.export-record-row strong, .export-log-row strong { display: block; margin: 7px 0 4px; line-height: 1.45; }
.export-record-row p, .export-log-row p { margin: 0; color: var(--muted); font-size: 12px; }
.export-log-row { display: block; padding: 14px; transition: .2s ease; }
.export-log-row strong { overflow-wrap: anywhere; }
.export-log-row:hover { transform: translateX(3px); border-color: rgba(114,27,40,.25); }
.settings-side { align-self: start; }
.settings-action { margin-top: 9px; }
.alert-panel { margin-bottom: 12px; padding: 13px 15px; border: 1px solid rgba(114,27,40,.2); border-radius: 11px; background: var(--brand-soft); color: var(--brand); line-height: 1.6; }
.success-panel { border-color: rgba(50,98,74,.22); background: var(--evidence-soft); color: var(--evidence); }

.modal-window { position: fixed; inset: 0; z-index: 80; display: none; place-items: center; padding: 24px; }
.modal-window:target { display: grid; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(30,21,20,.58); backdrop-filter: blur(8px); }
.modal-panel { position: relative; z-index: 1; width: min(1060px,100%); max-height: calc(100vh - 48px); overflow: auto; padding: 24px; border-radius: var(--radius-lg); background: var(--surface); box-shadow: var(--shadow-lg); }
.model-import-grid { display: grid; grid-template-columns: minmax(0,1fr) minmax(320px,.7fr); gap: 18px; }
.model-import-preview { display: grid; align-self: start; gap: 10px; }
.import-preview-stage, .import-preview-stage canvas { min-height: 320px; height: 320px; }

.auth-page { background: #211416; }
.auth-shell { display: grid; place-items: center; width: 100%; min-height: 100vh; padding: 24px; background: linear-gradient(90deg, rgba(30,17,18,.35), rgba(30,17,18,.72)), url('/static/img/login-bg.png') center/cover; }
.login-layout { width: min(100%, 440px); }
.login-card { display: grid; gap: 18px; padding: 38px; border-color: rgba(255,255,255,.24); background: rgba(255,255,255,.94); box-shadow: var(--shadow-lg); backdrop-filter: blur(20px); }
.login-card-heading { display: grid; justify-items: center; gap: 8px; text-align: center; }
.login-card-heading .seal-mark { display: grid; place-items: center; width: 48px; height: 48px; border: 1px solid rgba(114,27,40,.3); border-radius: 50%; color: var(--brand); font-family: var(--font-reading); font-size: 22px; }
.login-logo { width: 76px; height: 76px; object-fit: contain; filter: drop-shadow(0 8px 16px rgba(79,17,26,.12)); }
.login-card-heading h1 { font-size: 24px; line-height: 1.35; letter-spacing: -.02em; }
.login-card-heading p { margin: 0; color: var(--muted); }
.login-card label { display: grid; gap: 7px; }
.login-card label span { font-size: 13px; font-weight: 700; }
.login-card input { min-height: 48px; padding: 0 14px; border: 1px solid var(--line-strong); border-radius: 10px; background: #fff; }
.login-card .button { width: 100%; }
.login-hint { margin: -2px 0 0; color: var(--muted); font-size: 11px; text-align: center; }
.empty-state { display: grid; place-content: center; min-height: 220px; padding: 34px; text-align: center; }
.empty-state h2 { margin-bottom: 8px; }
.empty-state .button { justify-self: center; }

.reveal-ready { opacity: 0; transform: translateY(24px); }
.reveal-ready.is-revealed { opacity: 1; transform: none; transition: opacity .62s ease var(--reveal-delay), transform .62s cubic-bezier(.2,.7,.2,1) var(--reveal-delay); }

/* Source collector */
.collector-page { display: grid; grid-template-columns: minmax(0, 1fr); gap: 24px; min-width: 0; }
.collector-page > *, .collector-page .split-heading > * { min-width: 0; }
.collector-page .lead { overflow-wrap: anywhere; }
.collector-page.reveal-ready, .collector-page .reveal-ready { opacity: 1; transform: none; }
.collector-stats { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 14px; }
.collector-stats article { display: grid; gap: 4px; padding: 22px; border: 1px solid var(--line); border-radius: 18px; background: #fff; box-shadow: var(--shadow-soft); }
.collector-stats strong { color: var(--brand); font-family: var(--font-reading); font-size: 34px; }
.collector-stats span { color: var(--muted); font-size: 13px; }
.resource-tabs { display: flex; flex-wrap: wrap; gap: 10px; }
.resource-tabs a { padding: 10px 16px; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); background: #fff; font-weight: 700; text-decoration: none; }
.resource-tabs a.is-active { border-color: var(--brand); color: #fff; background: var(--brand); }
.collector-steps { display: flex; align-items: center; justify-content: center; gap: 12px; padding: 16px; border-radius: 16px; background: var(--brand-soft); color: var(--ink); font-size: 13px; }
.collector-steps a { display: flex; align-items: center; gap: 7px; padding: 7px 10px; border-radius: 10px; }
.collector-steps a.is-active { color: var(--brand); background: #fff; font-weight: 800; box-shadow: var(--shadow-sm); }
.collector-steps b { display: grid; width: 25px; height: 25px; place-items: center; border-radius: 50%; color: #fff; background: var(--brand); }
.collector-steps i { color: var(--brand); font-style: normal; opacity: .55; }
.collector-task-form { display: grid; gap: 16px; }
.collector-advanced { border: 1px solid var(--line); border-radius: 14px; background: #fbf9f6; }
.collector-advanced summary { padding: 15px 17px; color: var(--brand); cursor: pointer; font-size: 13px; font-weight: 800; }
.collector-advanced[open] summary { border-bottom: 1px solid var(--line); }
.collector-advanced label { margin: 16px; }
.collector-yaml { min-height: 420px; resize: vertical; font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace; font-size: 13px; line-height: 1.55; }
.collector-action-bar { display: flex; align-items: center; gap: 18px; padding: 18px 22px; border: 1px solid rgba(114,27,40,.14); border-radius: 16px; background: #fff; }
.collector-action-bar p { margin: 0; color: var(--muted); font-size: 13px; }
.collector-review { min-width: 0; padding: 24px; border: 1px solid var(--line); border-radius: 20px; background: #fff; box-shadow: var(--shadow-soft); }
.collector-review-actions, .collector-batch-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; }
.collector-batch-actions { margin-top: 16px; }
.collector-table-wrap { width: 100%; max-width: 100%; margin-top: 18px; overflow: auto; border: 1px solid var(--line); border-radius: 14px; }
.collector-table { width: 100%; min-width: 920px; border-collapse: collapse; font-size: 13px; }
.collector-table th { position: sticky; top: 0; z-index: 1; padding: 12px; text-align: left; background: #f7f3ef; color: var(--muted); }
.collector-table td { padding: 13px 12px; border-top: 1px solid var(--line); vertical-align: top; }
.collector-table td:first-child { width: 50px; text-align: center; }
.collector-table td:nth-child(2) { width: 30%; }
.collector-table strong, .collector-table small, .collector-table a { display: block; }
.collector-table small { margin-top: 4px; color: var(--muted); }
.collector-table a { margin-top: 7px; color: var(--brand); font-size: 12px; }
.collector-table input:not([type="checkbox"]) { min-width: 220px; }
.collector-channel { display: inline-flex; padding: 4px 8px; border-radius: 999px; background: var(--brand-soft); color: var(--brand); font-size: 11px; font-weight: 800; }
.collector-final-actions { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 18px; }
.collector-final-actions form { padding: 24px; border: 1px solid var(--line); border-radius: 20px; background: #fff; box-shadow: var(--shadow-soft); }
.collector-final-actions h2 { margin: 5px 0 8px; }
.collector-final-actions p:not(.eyebrow) { min-height: 42px; color: var(--muted); }

/* 2026-07-17 visual polish: shared visual language */
.icon-sprite { position: absolute; width: 0; height: 0; overflow: hidden; }
.nav-icon,
.mobile-nav svg,
.entry-icon,
.quick-action-list svg {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.nav-icon { display: block; width: 26px; height: 26px; padding: 5px; }
.mobile-nav svg { width: 19px; height: 19px; }
body.app-page {
  background:
    radial-gradient(circle at 84% 6%, rgba(114,27,40,.045), transparent 28rem),
    linear-gradient(180deg, #f3f2f0 0%, #ececeb 100%);
}
.page { position: relative; }
.button { letter-spacing: .01em; }
.button.primary { border-color: rgba(79,17,26,.2); }
.button.secondary:hover { border-color: rgba(114,27,40,.3); background: #fff; box-shadow: var(--shadow-sm); }
.hero-slide-image { filter: saturate(.84) contrast(1.04) sepia(.04); }
.hero-carousel::after { content: ""; position: absolute; z-index: 4; inset: 0; pointer-events: none; border: 1px solid rgba(255,255,255,.12); border-radius: inherit; }
.metric-tile::before, .step-card::before, .stat-card::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: linear-gradient(var(--brand-bright), var(--bronze)); opacity: .72; }
.metric-tile strong, .stat-card strong { font-family: var(--font-reading); font-weight: 800; }
.resource-entry-grid a { grid-template-columns: 46px minmax(0,1fr); align-items: center; }
.resource-entry-grid .entry-icon { grid-row: 1 / span 2; width: 42px; height: 42px; padding: 10px; border-radius: 13px; color: var(--brand); background: var(--brand-soft); }
.resource-entry-grid a:nth-child(2) .entry-icon { color: var(--bronze); background: #f2eae1; }
.resource-entry-grid a:nth-child(3) .entry-icon { color: #596f79; background: #eaf0f1; }
.resource-entry-grid strong, .resource-entry-grid span { grid-column: 2; }
.quick-action-list a { grid-template-columns: 34px minmax(0,1fr); align-items: center; }
.quick-action-list svg { width: 32px; height: 32px; padding: 7px; border-radius: 10px; color: var(--brand); background: var(--brand-soft); }
.quick-action-list a > span { display: grid; gap: 4px; }
.quick-action-list a small { color: var(--muted); font-size: 12px; line-height: 1.5; }
.quick-action-list a:hover svg { color: #fff; background: var(--brand); }
.course-band, .topic-focus-panel, .dialogue-preview, .dashboard-side { box-shadow: 0 18px 54px rgba(48,34,30,.075); }
.course-band { border: 1px solid rgba(114,27,40,.11); border-radius: var(--radius-lg); background: #fff; }

/* Course map and document reading */
.topic-catalog-intro { position: relative; overflow: hidden; display: grid; grid-template-columns: minmax(0,1.2fr) minmax(360px,.8fr); gap: 40px; align-items: end; margin-bottom: 46px; padding: clamp(30px,5vw,56px); border: 1px solid rgba(114,27,40,.12); border-radius: 24px; background: linear-gradient(135deg,#fff 0%,#faf6f1 58%,#f1e5dd 100%); box-shadow: var(--shadow-md); }
.topic-catalog-intro::after { content: ""; position: absolute; right: -90px; top: -110px; width: 320px; height: 320px; border: 1px solid rgba(114,27,40,.08); border-radius: 50%; box-shadow: 0 0 0 42px rgba(114,27,40,.025),0 0 0 84px rgba(114,27,40,.018); }
.topic-catalog-intro > * { position: relative; z-index: 1; }
.topic-catalog-intro .section-heading { margin: 0; }
.topic-outline { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 8px; }
.topic-outline a { display: grid; gap: 5px; min-height: 112px; padding: 16px; border: 1px solid rgba(114,27,40,.12); border-radius: 14px; background: rgba(255,255,255,.72); backdrop-filter: blur(10px); transition: .2s ease; }
.topic-outline a:hover { transform: translateY(-3px); border-color: rgba(114,27,40,.28); background: #fff; }
.topic-outline span { color: var(--brand); font-family: var(--font-reading); font-size: 12px; font-weight: 800; }
.topic-outline strong { font-size: 21px; }
.topic-outline small { color: var(--muted); }
.volume-section { position: relative; padding-left: 28px; }
.volume-section::before { content: ""; position: absolute; left: 8px; top: 22px; bottom: -46px; width: 1px; background: linear-gradient(var(--brand),rgba(114,27,40,.08)); }
.volume-section:last-child::before { bottom: 24px; }
.volume-title { display: grid; grid-template-columns: 38px minmax(0,1fr) auto; align-items: center; }
.volume-title .volume-index { display: grid; place-items: center; width: 34px; height: 34px; margin-left: -37px; border-radius: 50%; color: #fff; background: var(--brand); box-shadow: 0 0 0 7px var(--page-bg); font-family: var(--font-reading); }
.chapter-card { border-top: 3px solid rgba(114,27,40,.55); background: linear-gradient(155deg,#fff,#fbfaf8); }
.chapter-card h3 { font-family: var(--font-reading); font-weight: 800; }
.chapter-card .source-count { padding: 5px 9px; border-radius: 999px; background: var(--evidence-soft); color: var(--evidence); }
.topic-seal, .document-stamp { display: grid; place-items: center; width: 66px; height: 66px; margin: 0 0 22px; border: 1px solid rgba(114,27,40,.32); border-radius: 50%; color: var(--brand); background: radial-gradient(circle,#fff 58%,var(--brand-soft)); box-shadow: 0 10px 28px rgba(114,27,40,.1); font: 800 23px var(--font-reading); }
.topic-detail-page .detail-meta h1, .source-document-page .detail-meta h1 { font-family: var(--font-reading); letter-spacing: -.025em; }
.topic-detail-page .info-block:first-child { border-left: 4px solid var(--brand); background: linear-gradient(120deg,#fff,var(--brand-soft)); }
.learning-route { display: grid; grid-template-columns: repeat(5,auto); align-items: center; justify-content: center; gap: 14px; padding: 18px 22px; border: 1px solid rgba(114,27,40,.12); border-radius: 16px; color: var(--text-2); background: #fff; box-shadow: var(--shadow-sm); }
.learning-route span { display: flex; align-items: center; gap: 8px; font-weight: 750; }
.learning-route b { display: grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; color: #fff; background: var(--brand); font-size: 10px; }
.learning-route i { color: var(--line-strong); font-style: normal; }
.source-row { position: relative; padding-right: 108px; }
.source-row em { position: absolute; right: 18px; top: 18px; color: var(--evidence); font-size: 11px; font-style: normal; font-weight: 800; }
.source-row em::after { content: " →"; }
.document-stamp { width: auto; height: auto; min-width: 76px; justify-self: start; padding: 8px 14px; border-radius: 4px; font-size: 14px; letter-spacing: .12em; transform: rotate(-2deg); }
.document-side-facts { display: grid; gap: 0; margin-top: 28px; border-top: 1px solid var(--line); }
.document-side-facts div { display: grid; gap: 5px; padding: 13px 0; border-bottom: 1px solid var(--line); }
.document-side-facts dt { color: var(--muted); font-size: 11px; }
.document-side-facts dd { margin: 0; color: var(--text-2); font-size: 13px; line-height: 1.55; }
.source-document-page .detail-main { max-width: 860px; }
.source-document-page .info-block { border-radius: 4px; box-shadow: 0 15px 42px rgba(56,42,34,.065); }
.document-body-card { position: relative; overflow: hidden; padding: clamp(34px,5vw,58px); border-color: #ddd1c3; background: linear-gradient(90deg,rgba(133,97,62,.045) 1px,transparent 1px),#fffdf8; background-size: 34px 100%; }
.document-body-card::before { content: "原文"; position: absolute; right: 24px; top: 22px; color: rgba(114,27,40,.1); font: 800 54px var(--font-reading); }
.document-text { max-width: 44em; margin-inline: auto; color: #413d39 !important; font-family: var(--font-reading); font-size: 17px; line-height: 2.05 !important; white-space: pre-line; text-align: justify; text-justify: inter-ideograph; }
.document-summary-card { border-left: 4px solid var(--bronze); }
.document-task-card { border-left: 4px solid var(--evidence); background: linear-gradient(120deg,#fff,var(--evidence-soft)); }

/* Filter disclosure and calmer working surfaces */
.filter-disclosure { width: 100%; margin-top: 18px; border: 1px solid var(--line); border-radius: 14px; background: #fbfaf8; overflow: hidden; }
.filter-disclosure > summary { display: none; grid-template-columns: minmax(0,1fr) auto; gap: 4px 14px; align-items: center; padding: 15px 17px; cursor: pointer; list-style: none; }
.filter-disclosure > summary::-webkit-details-marker { display: none; }
.filter-disclosure > summary span { color: var(--brand); font-weight: 800; }
.filter-disclosure > summary small { grid-column: 1; color: var(--muted); line-height: 1.45; }
.filter-disclosure > summary b { grid-column: 2; grid-row: 1 / span 2; color: var(--brand); font-size: 12px; }
.filter-disclosure[open] > summary b::before { content: "收起"; }
.filter-disclosure:not([open]) > summary b::before { content: "展开"; }
.filter-disclosure > summary b { font-size: 0; }
.filter-disclosure > summary b::before { font-size: 12px; }
.filter-disclosure .resource-filter, .filter-disclosure .nursing-filter { margin: 0; padding: 16px; }
.conversation-workspace { border-color: rgba(70,85,141,.16); box-shadow: 0 22px 62px rgba(38,36,53,.09); }
.character-visual-card { border-color: rgba(114,27,40,.16); box-shadow: 0 22px 60px rgba(50,24,28,.12); }
.student-message { box-shadow: 0 8px 18px rgba(94,68,44,.055); }
.ai-message { box-shadow: 0 8px 18px rgba(70,85,141,.055); }
.collector-table tbody tr:nth-child(even) { background: #fcfaf8; }
.collector-table tbody tr:has(input[type="checkbox"]:checked) { background: #f8efef; }
.collector-table tbody tr:hover { background: #f4f0eb; }
.collector-table th { box-shadow: inset 0 -1px var(--line); }
.persona-card { transition: border-color .2s ease, box-shadow .2s ease; }
.persona-card[open] { border-color: rgba(114,27,40,.2); box-shadow: var(--shadow-md); }
.persona-card > summary:hover { background: #fbf7f4; }
.persona-avatar { background: linear-gradient(145deg,var(--brand-bright),var(--brand-dark)); box-shadow: 0 7px 18px rgba(114,27,40,.2); }
.settings-list dd.is-ready::before, .settings-list dd.is-pending::before { content: ""; display: inline-block; width: 7px; height: 7px; margin-right: 8px; border-radius: 50%; vertical-align: 1px; }
.settings-list dd.is-ready::before { background: #4b9b6a; box-shadow: 0 0 0 4px rgba(75,155,106,.11); }
.settings-list dd.is-pending::before { background: #c38a42; box-shadow: 0 0 0 4px rgba(195,138,66,.11); }
.empty-state::before { content: ""; width: 42px; height: 50px; margin: 0 auto 16px; border: 2px solid rgba(114,27,40,.2); border-radius: 5px; background: linear-gradient(#fff,#faf4ef); box-shadow: inset 0 -12px var(--brand-soft); transform: rotate(-2deg); }
.dashboard-empty::before { width: 34px; height: 40px; }

@media (max-width: 1180px) {
  :root { --sidebar-width: 210px; }
  .chat-page-shell, .voice-page-shell { grid-template-columns: 1fr; }
  .chat-sidebar, .evidence-sidebar, .voice-character-column, .voice-evidence-column { position: static; }
  .chat-sidebar { grid-template-columns: minmax(280px,.6fr) minmax(0,1.4fr); }
  .evidence-sidebar { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .character-3d-stage, .character-3d-stage canvas { min-height: 320px; height: 320px; }
  .chat-studio { grid-template-columns: minmax(280px, 330px) minmax(0, 1fr); }
  .role-teacher .hero-slide h1 { font-size: clamp(36px, 4vw, 50px); }
  .stats-grid { grid-template-columns: repeat(3,minmax(0,1fr)); }
}

@media (max-width: 900px) {
  :root { --sidebar-width: 0px; }
  .app-shell { display: block; }
  .app-sidebar { display: none; }
  .app-workspace { min-width: 0; }
  .app-topbar { min-height: 64px; padding: 0 18px; }
  .mobile-brand { display: flex; align-items: center; gap: 9px; }
  .mobile-brand .brand-seal { width: 32px; height: 32px; color: var(--brand); border-color: rgba(114,27,40,.22); font-size: 16px; }
  .mobile-brand .brand-logo { width: 34px; height: 34px; }
  .mobile-brand strong { font-size: 13px; }
  .topbar-context, .system-status { display: none; }
  .mobile-nav { position: fixed; z-index: 50; left: 12px; right: 12px; bottom: 10px; display: grid; grid-template-columns: repeat(5,1fr); padding: 7px; border: 1px solid rgba(255,255,255,.75); border-radius: 18px; background: rgba(255,255,255,.9); box-shadow: 0 18px 50px rgba(35,25,22,.18); backdrop-filter: blur(18px); }
  .mobile-nav a { display: grid; justify-items: center; gap: 2px; padding: 6px 2px; border-radius: 12px; color: var(--muted); font-size: 10px; }
  .mobile-nav a span { font-family: var(--font-reading); font-size: 15px; }
  .mobile-nav a.is-active { color: var(--brand); background: var(--brand-soft); font-weight: 800; }
  .page { width: min(100% - 28px, 760px); padding: 28px 0 100px; }
  .hero-slide { grid-template-columns: 1fr; }
  .hero-fact { display: none; }
  .teacher-home-layout, .student-home-layout, .detail-layout, .detail-review-layout, .export-layout, .settings-layout, .model-import-grid, .course-band, .workspace-panel { grid-template-columns: 1fr; }
  .chat-studio { grid-template-columns: 1fr; }
  .character-studio { position: static; grid-template-columns: minmax(240px, .72fr) minmax(0, 1.28fr); }
  .character-visual-card { min-height: 320px; grid-row: span 2; }
  .character-model-shell { grid-row: span 3; }
  .feature-jump-grid { grid-column: 1 / -1; grid-template-columns: repeat(4, minmax(0,1fr)); }
  .detail-meta, .review-panel { position: static; }
  .course-band img, .workspace-panel img { min-height: 210px; order: 0; }
  .dashboard-metrics, .learning-steps { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .topic-pulse-grid { grid-template-columns: 1fr; }
  .collector-final-actions { grid-template-columns: 1fr; }
  .topic-catalog-intro { grid-template-columns: 1fr; }
  .source-document-page .detail-main { max-width: none; }
}

@media (max-width: 620px) {
  h1 { font-size: 34px; }
  .page { width: min(100% - 24px, 560px); }
  .topbar-actions { gap: 4px; }
  .role-chip { padding: 7px 9px; }
  .hero-carousel { min-height: 450px; border-radius: 18px; }
  .hero-slide { padding: 32px 24px 82px; align-items: end; }
  .hero-slide::before { background: linear-gradient(0deg, rgba(30,17,18,.96) 0%, rgba(40,20,22,.75) 58%, rgba(30,17,18,.16) 100%); }
  .hero-slide h1 { font-size: 34px; }
  .hero-slide p { font-size: 14px; }
  .hero-controls { left: 24px; right: 24px; bottom: 20px; }
  .dashboard-metrics, .learning-steps, .stats-grid, .chapter-grid, .volume-grid, .record-row, .topic-stat-row, .two-column-info, .checkbox-grid, .mini-metrics, .chat-sidebar, .evidence-sidebar { grid-template-columns: 1fr; }
  .metric-tile, .step-card { min-height: 134px; }
  .split-heading { align-items: flex-start; flex-direction: column; }
  .section-heading .back-link { margin-bottom: 12px; }
  .record-meta { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .character-studio { grid-template-columns: 1fr; }
  .character-visual-card, .character-model-shell { grid-row: auto; }
  .feature-jump-grid { grid-column: auto; grid-template-columns: repeat(2, minmax(0,1fr)); }
  .conversation-workspace { padding: 18px; }
  .conversation-header, .message-tools, .message-submit-row { align-items: flex-start; flex-direction: column; }
  .conversation-ready { align-self: flex-start; }
  .conversation-stream { max-height: none; overflow: visible; }
  .dialogue-turn .student-message, .dialogue-turn .ai-message { max-width: 100%; }
  .prompt-suggestion-grid { grid-template-columns: 1fr; }
  .prompt-suggestion-grid article:nth-child(n+4) { display: none; }
  .drawer-panel { width: 100%; padding: 22px; }
  .drawer-header { margin: -22px -22px 18px; padding: 20px 22px 16px; }
  .info-block, .form-panel, .topic-focus-panel, .dialogue-preview { padding: 20px; }
  .voice-controls-bar { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .voice-status-card { align-items: flex-start; flex-direction: column; }
  .voice-transcripts article:first-child, .voice-transcripts article:last-child { margin: 0; }
  .login-card { padding: 28px 22px; }
  .collector-stats { grid-template-columns: 1fr; }
  .collector-steps { align-items: stretch; flex-direction: column; }
  .collector-steps i { display: none; }
  .pagination { align-items: flex-start; flex-direction: column; }
  .section-tabs { top: 72px; overflow-x: auto; flex-wrap: nowrap; }
  .section-tabs a { white-space: nowrap; }
  .resource-entry-grid, .maintenance-grid { grid-template-columns: 1fr; }
  .preview-character-row { grid-template-columns: 1fr; }
  .collector-action-bar { align-items: flex-start; flex-direction: column; }
  .filter-disclosure > summary { display: grid; }
  .filter-disclosure:not([open]) { background: #fff; }
  .topic-catalog-intro { gap: 24px; margin-bottom: 34px; padding: 26px 22px; }
  .topic-outline { grid-template-columns: 1fr; }
  .topic-outline a { grid-template-columns: 30px minmax(0,1fr) auto; align-items: center; min-height: 0; }
  .topic-outline small { text-align: right; }
  .volume-section { padding-left: 18px; }
  .volume-title { grid-template-columns: 30px minmax(0,1fr) auto; }
  .volume-title .volume-index { width: 28px; height: 28px; margin-left: -27px; box-shadow: 0 0 0 5px var(--page-bg); font-size: 11px; }
  .learning-route { grid-template-columns: 1fr; justify-items: start; }
  .learning-route i { display: none; }
  .source-row { padding-right: 18px; }
  .source-row em { position: static; display: inline-flex; margin-top: 9px; }
  .document-body-card { padding: 28px 22px; background-size: 26px 100%; }
  .document-text { font-size: 16px; line-height: 1.95 !important; }
}

.source-detail-facts {
  display: grid;
  gap: 0;
  margin: 18px 0;
}

.source-detail-facts div {
  border-bottom: 1px solid var(--line, #e6ddd2);
  display: grid;
  gap: 12px;
  grid-template-columns: 100px minmax(0, 1fr);
  padding: 9px 0;
}

.source-detail-facts dt {
  color: var(--muted, #7b6f68);
}

.source-detail-facts dd {
  margin: 0;
  overflow-wrap: anywhere;
}

.student-identity-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 14px; }
.sidebar-switch-link { color: rgba(255,255,255,.7); font-size: 11px; }
.sidebar-profile-actions { display: grid; justify-items: end; gap: 2px; }
.student-identity-card { display: grid; grid-template-columns: auto 1fr; gap: 5px 12px; align-items: center; padding: 20px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow-sm); cursor: pointer; }
.student-identity-card:has(input:checked) { border-color: var(--brand); box-shadow: 0 0 0 3px rgba(114,27,40,.1); }
.student-identity-card input { position: absolute; opacity: 0; pointer-events: none; }
.student-identity-card .profile-avatar { grid-row: span 2; color: #fff; background: var(--brand); }
.student-identity-card strong { font-size: 17px; }
.student-identity-card small { color: var(--muted); }
.student-identity-grid .form-actions { grid-column: 1 / -1; margin-top: 8px; }
.guide-card-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 16px; }
.guide-card { display: grid; gap: 13px; padding: 24px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow-sm); transition: .2s ease; }
.guide-card:hover { transform: translateY(-3px); border-color: rgba(114,27,40,.25); box-shadow: var(--shadow-md); }
.guide-card h2, .guide-card p { margin: 0; }
.guide-card h2 { font-size: 21px; }
.guide-card p { color: var(--text-2); line-height: 1.7; }
.guide-card-top, .guide-detail-heading, .guide-task-title, .guide-progress-row summary { display: flex; justify-content: space-between; align-items: center; gap: 14px; }
.guide-card-top > span, .guide-task-title > span { color: var(--brand); font-size: 12px; font-weight: 800; }
.status-badge { display: inline-flex; padding: 5px 9px; border-radius: 999px; font-size: 11px; font-style: normal; font-weight: 800; white-space: nowrap; }
.status-draft, .status-not_started { color: var(--muted); background: #eeeae5; }
.status-published, .status-submitted { color: var(--evidence); background: var(--evidence-soft); }
.status-in_progress { color: var(--warning); background: var(--warning-soft); }
.guide-meta { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 8px; margin: 0; }
.guide-meta div { padding: 10px; border-radius: 9px; background: var(--surface-warm); }
.guide-meta dt { color: var(--muted); font-size: 10px; }
.guide-meta dd { margin: 4px 0 0; font-size: 12px; font-weight: 750; }
.guide-item-builder { display: grid; gap: 14px; }
.guide-item-list { display: grid; gap: 12px; }
.guide-item-editor { display: grid; grid-template-columns: 34px 150px minmax(150px,.55fr) minmax(220px,1fr) auto; gap: 10px; align-items: start; padding: 14px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface-warm); }
.guide-item-order, .guide-task-number { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; color: #fff; background: var(--brand); font-size: 12px; font-weight: 800; }
.guide-item-editor select, .guide-item-editor input { min-height: 42px; }
.guide-item-editor textarea { min-height: 74px; }
.guide-item-options { grid-column: 2 / -1; display: grid; grid-template-columns: repeat(3,minmax(150px,1fr)); gap: 10px; padding-top: 8px; border-top: 1px dashed var(--line); }
.guide-item-options label { display: grid; gap: 5px; }
.guide-item-options label > span { color: var(--muted); font-size: 10px; font-weight: 800; }
.guide-item-options .wide { grid-column: span 3; }
.guide-detail-heading { margin: 24px 0; align-items: flex-start; }
.guide-detail-heading h1 { margin-bottom: 8px; }
.guide-detail-heading .actions { flex-shrink: 0; }
.guide-overview-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 14px; margin-bottom: 22px; }
.guide-overview-grid small { color: var(--muted); }
.guide-response-form, .guide-progress-list { display: grid; gap: 14px; }
.guide-task-card { display: grid; grid-template-columns: 50px minmax(0,1fr); gap: 14px; padding: 24px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow-sm); }
.guide-task-body { display: grid; gap: 13px; }
.guide-task-title { justify-content: flex-start; }
.guide-task-title h2 { margin: 0; font-size: 20px; }
.guide-task-body > p { margin: 0; color: var(--text-2); line-height: 1.75; }
.guide-task-body label { display: grid; gap: 8px; }
.guide-task-body label > span { font-size: 12px; font-weight: 800; }
.guide-task-body textarea { width: 100%; padding: 13px 14px; border: 1px solid var(--line-strong); border-radius: 11px; resize: vertical; line-height: 1.65; }
.guide-submit-actions { position: sticky; bottom: 12px; z-index: 4; justify-content: flex-end; padding: 14px; border: 1px solid var(--line); border-radius: 14px; background: rgba(255,255,255,.94); backdrop-filter: blur(12px); box-shadow: var(--shadow-md); }
.guide-progress-row { overflow: hidden; border: 1px solid var(--line); border-radius: 13px; background: var(--surface); }
.guide-progress-row summary { padding: 16px 18px; cursor: pointer; list-style: none; }
.guide-progress-row summary > span { display: grid; gap: 3px; margin-right: auto; }
.guide-progress-row summary small, .guide-progress-row summary > span small { color: var(--muted); }
.guide-response-review { display: grid; gap: 10px; padding: 0 18px 18px; }
.guide-response-review div { padding: 13px; border-radius: 10px; background: var(--surface-warm); }
.guide-response-review p { margin: 6px 0 0; color: var(--text-2); white-space: pre-wrap; }
.guide-progress-empty { margin: 0; padding: 0 18px 18px; color: var(--muted); }
.workflow-phase-strip { display: flex; flex-wrap: wrap; align-items: center; gap: 7px; margin-top: 12px; }
.workflow-phase-strip span { padding: 5px 9px; border-radius: 999px; color: var(--muted); background: #eeeae5; font-size: 10px; font-weight: 800; }
.workflow-phase-strip span.is-current { color: var(--evidence); background: var(--evidence-soft); }
.workflow-phase-strip em { color: var(--brand); font-size: 11px; font-style: normal; font-weight: 800; }
.historical-background { margin-bottom: 22px; }
.historical-background p { white-space: pre-wrap; }
.unit-question-chain, .workflow-section { display: grid; gap: 15px; margin: 28px 0; }
.unit-question-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 12px; }
.unit-question-grid article { display: grid; gap: 8px; padding: 18px; border-left: 4px solid var(--brand); border-radius: 10px; background: var(--surface); box-shadow: var(--shadow-sm); }
.unit-question-grid span { color: var(--brand); font-size: 10px; font-weight: 850; }
.unit-question-grid h3, .unit-question-grid p { margin: 0; }
.unit-question-grid h3 { font-size: 16px; line-height: 1.65; }
.unit-question-grid p, .unit-question-grid small { color: var(--muted); }
.workflow-state-form { display: flex; flex-wrap: wrap; gap: 10px; align-items: end; margin: 16px 0 26px; padding: 16px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface-warm); }
.workflow-state-form label { display: grid; gap: 5px; min-width: 190px; }
.workflow-state-form label span { font-size: 10px; font-weight: 800; }
.workflow-overview-form { margin-bottom: 30px; }
.workflow-status-summary { display: grid; gap: 5px; align-content: center; padding: 13px; border-radius: 10px; background: var(--surface-warm); }
.workflow-status-summary span, .workflow-status-summary small { color: var(--muted); }
.workflow-question-list, .diagnosis-record-list { display: grid; gap: 14px; }
.workflow-question-card, .diagnosis-record { display: grid; gap: 14px; padding: 20px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow-sm); }
.workflow-question-card > form { display: grid; gap: 10px; }
.workflow-question-head, .workflow-link-options { display: grid; grid-template-columns: 1fr 120px 140px; gap: 10px; }
.workflow-question-head label, .workflow-link-options label { display: grid; gap: 5px; }
.question-source-links { display: grid; gap: 8px; padding-top: 12px; border-top: 1px solid var(--line); }
.question-source-links > div { display: flex; justify-content: space-between; gap: 12px; align-items: center; padding: 10px; border-radius: 9px; background: var(--evidence-soft); }
.question-source-links a { display: grid; gap: 3px; }
.question-source-links span, .question-source-links small { color: var(--muted); font-size: 10px; }
.task-source-pack { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 8px; padding: 13px; border-radius: 11px; background: var(--evidence-soft); }
.task-source-pack > strong, .task-source-pack > small { grid-column: 1 / -1; }
.task-source-pack a { display: grid; gap: 3px; padding: 10px; border-left: 3px solid var(--evidence); background: rgba(255,255,255,.7); }
.task-source-pack span, .task-source-pack small { color: var(--muted); font-size: 10px; }
.student-diagnosis-summary { display: grid; grid-template-columns: .8fr 1.2fr; gap: 18px; margin: 22px 0; padding: 20px; border: 1px solid rgba(70,85,141,.2); border-radius: var(--radius); background: #f2f3f8; }
.student-diagnosis-summary h2, .student-diagnosis-summary p { margin: 4px 0; }
.diagnosis-layout { display: grid; grid-template-columns: minmax(0,1.35fr) minmax(270px,.65fr); gap: 16px; align-items: start; }
.diagnosis-config fieldset { display: grid; gap: 9px; }
.diagnosis-run-panel { position: sticky; top: 90px; display: grid; gap: 12px; padding: 22px; border-radius: var(--radius); color: #fff; background: linear-gradient(145deg,#3f4d7c,#252c4b); box-shadow: var(--shadow-md); }
.diagnosis-run-panel h2, .diagnosis-run-panel p { margin: 0; }
.diagnosis-run-panel small { color: rgba(255,255,255,.72); }
.diagnosis-job-list { display: grid; gap: 7px; padding-top: 10px; border-top: 1px solid rgba(255,255,255,.2); }
.diagnosis-job-list div { display: grid; gap: 2px; font-size: 11px; }
.class-diagnosis-grid, .diagnosis-point-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 12px; }
.class-diagnosis-grid article, .diagnosis-point-grid > div { padding: 15px; border-radius: 11px; background: var(--surface-warm); }
.class-diagnosis-grid h3, .diagnosis-point-grid h3, .class-diagnosis-grid p, .diagnosis-point-grid p { margin: 0 0 7px; }
.class-diagnosis-grid small { color: var(--muted); }
.diagnosis-record > header { display: flex; justify-content: space-between; gap: 12px; }
.diagnosis-record > header > div { display: grid; gap: 3px; }
.diagnosis-record > header small { color: var(--muted); }
.diagnosis-evidence { display: grid; gap: 8px; }
.diagnosis-evidence blockquote { margin: 0; padding: 11px 14px; border-left: 3px solid var(--ai); background: #f2f3f8; }
.discussion-room-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 16px; }
.discussion-room-card { display: grid; gap: 13px; padding: 24px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow-sm); transition: .2s ease; }
.discussion-room-card:hover { transform: translateY(-3px); border-color: rgba(70,85,141,.25); box-shadow: var(--shadow-md); }
.discussion-room-card.compact { padding: 18px; }
.discussion-room-card h2, .discussion-room-card p { margin: 0; }
.discussion-room-card h2 { font-size: 21px; }
.discussion-room-card p { color: var(--text-2); line-height: 1.7; }
.discussion-room-top { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.discussion-room-top > span { color: var(--ai); font-size: 12px; font-weight: 800; }
.discussion-guide-link { color: var(--evidence); }
.status-open { color: var(--evidence); background: var(--evidence-soft); }
.status-closed { color: var(--muted); background: #eeeae5; }
.guide-discussion-links { display: grid; gap: 12px; margin: 24px 0; }
.discussion-heading { display: flex; justify-content: space-between; gap: 20px; align-items: flex-start; margin: 24px 0; }
.discussion-heading h1 { margin-bottom: 8px; }
.discussion-brief { display: grid; grid-template-columns: minmax(0,1.2fr) minmax(280px,.8fr); gap: 16px; padding: 22px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow-sm); }
.discussion-brief strong { color: var(--brand); }
.discussion-brief p { margin: 8px 0 0; color: var(--text-2); line-height: 1.75; }
.discussion-brief dl { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 8px; margin: 0; }
.discussion-brief dl div { padding: 11px; border-radius: 10px; background: var(--surface-warm); }
.discussion-brief dt { color: var(--muted); font-size: 10px; }
.discussion-brief dd { margin: 5px 0 0; font-size: 12px; font-weight: 750; }
.discussion-linked-guide { grid-column: 1 / -1; color: var(--ai); font-size: 12px; font-weight: 750; }
.discussion-teacher-actions { display: flex; justify-content: flex-end; gap: 10px; margin: 14px 0 24px; }
.discussion-teacher-actions form { margin: 0; }
.discussion-compose { margin-top: 28px; padding: 24px; border-radius: var(--radius); background: linear-gradient(135deg,#f7f3ef,#f2f3f8); }
.discussion-compose .form-panel { box-shadow: none; }
.discussion-evidence-picker { display: grid; gap: 14px; }
.discussion-evidence-picker select[multiple] { min-height: 150px; padding: 8px; }
.discussion-stream { display: grid; gap: 14px; margin-top: 34px; }
.discussion-post { display: grid; gap: 15px; padding: 24px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow-sm); }
.discussion-post.is-featured { border-color: rgba(50,98,74,.35); box-shadow: 0 0 0 3px rgba(50,98,74,.08),var(--shadow-sm); }
.discussion-post.is-hidden-post, .discussion-reply.is-hidden-post { opacity: .62; border-style: dashed; }
.discussion-post > header, .discussion-reply > header { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.discussion-author { display: grid; grid-template-columns: 36px auto; gap: 2px 10px; align-items: center; }
.discussion-author > span { grid-row: span 2; display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; color: #fff; background: var(--brand); font-weight: 800; }
.discussion-author small, .discussion-reply header small { color: var(--muted); }
.discussion-post header em, .discussion-reply header em { padding: 4px 8px; border-radius: 99px; color: var(--evidence); background: var(--evidence-soft); font-size: 10px; font-style: normal; font-weight: 800; }
.discussion-claim, .discussion-reasoning { display: grid; grid-template-columns: 52px minmax(0,1fr); gap: 12px; }
.discussion-claim > span, .discussion-reasoning > span { color: var(--brand); font-size: 11px; font-weight: 800; }
.discussion-claim p, .discussion-reasoning p { margin: 0; color: var(--text-2); line-height: 1.8; white-space: pre-wrap; }
.discussion-evidence-list { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 9px; }
.discussion-evidence-list a { display: grid; gap: 5px; padding: 12px; border-left: 3px solid var(--evidence); background: var(--evidence-soft); }
.discussion-evidence-list span { color: var(--evidence); font-size: 10px; font-weight: 800; }
.discussion-evidence-list strong { font-size: 12px; line-height: 1.5; }
.discussion-evidence-list small { color: var(--muted); }
.discussion-moderation { display: flex; gap: 14px; }
.discussion-replies { display: grid; gap: 9px; margin-left: 44px; padding-left: 16px; border-left: 2px solid var(--line); }
.discussion-reply { display: grid; gap: 9px; padding: 14px; border-radius: 11px; background: var(--surface-warm); }
.discussion-reply > p { margin: 0; line-height: 1.7; }
.discussion-reply > small { color: var(--text-2); line-height: 1.6; }
.discussion-reply-box { margin-left: 44px; padding: 12px 14px; border: 1px solid var(--line); border-radius: 11px; }
.discussion-reply-box summary { color: var(--ai); font-size: 12px; font-weight: 800; cursor: pointer; }
.discussion-reply-box form { display: grid; gap: 10px; margin-top: 12px; }
.discussion-reply-box label { display: grid; gap: 6px; }
.discussion-reply-box label span { font-size: 11px; font-weight: 800; }
.discussion-reply-box textarea, .discussion-reply-box select { width: 100%; padding: 10px 12px; border: 1px solid var(--line-strong); border-radius: 9px; background: #fff; }
.reply-evidence-picker { padding: 10px; border: 1px dashed var(--line-strong); border-radius: 9px; }
.reply-evidence-picker summary { color: var(--evidence); cursor: pointer; }
.reply-evidence-picker label { margin-top: 9px; }
.collaboration-source-pack, .argument-editor-panel, .feedback-hero { display: grid; grid-template-columns: minmax(240px,.7fr) minmax(0,1.3fr); gap: 20px; margin: 24px 0; padding: 22px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow-sm); }
.collaboration-source-pack h2, .collaboration-source-pack p, .argument-editor-panel h2, .argument-editor-panel p { margin: 5px 0; }
.learning-group-grid, .argument-version-grid, .feedback-dimension-grid, .quality-metric-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 14px; }
.learning-group-card, .argument-version-grid > article, .feedback-dimension-grid article, .quality-metric-grid article { display: grid; gap: 10px; padding: 18px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); box-shadow: var(--shadow-sm); }
.learning-group-card header, .argument-version-grid header { display: grid; gap: 4px; }
.learning-group-card header span, .argument-version-grid header span, .quality-metric-grid span, .feedback-dimension-grid span { color: var(--brand); font-size: 11px; font-weight: 800; }
.learning-group-card > div { display: flex; flex-wrap: wrap; gap: 8px; }
.learning-group-card > div span { display: grid; gap: 2px; padding: 8px 10px; border-radius: 9px; background: var(--surface-warm); }
.learning-group-card small, .argument-version-grid small, .quality-metric-grid small { color: var(--muted); }
.group-manual-editor { margin-top: 16px; padding: 14px; border: 1px dashed var(--line-strong); border-radius: 12px; }
.group-member-picker { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 9px; }
.group-member-picker > div { display: grid; grid-template-columns: 1fr 150px; gap: 8px; align-items: center; padding: 10px; border-radius: 9px; background: var(--surface-warm); }
.source-checkbox-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 8px; }
.source-checkbox-grid label { display: flex !important; gap: 8px; align-items: flex-start; padding: 9px; border-radius: 9px; background: var(--evidence-soft); }
.argument-timeline { margin-top: 34px; }
.argument-version-grid > article.is-own { border-color: rgba(114,27,40,.32); box-shadow: 0 0 0 3px rgba(114,27,40,.07); }
.argument-version-grid h3, .argument-version-grid p { margin: 0; line-height: 1.65; }
.argument-version-grid blockquote { margin: 0; padding: 10px 12px; border-left: 3px solid var(--ai); background: #f2f3f8; }
.argument-version-grid footer { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.argument-version-grid footer a { padding: 4px 8px; border-radius: 99px; color: var(--evidence); background: var(--evidence-soft); font-size: 10px; }
.quality-metric-grid { grid-template-columns: repeat(3,minmax(0,1fr)); margin: 22px 0; }
.quality-metric-grid strong { font-size: 28px; }
.assessment-layout { display: grid; grid-template-columns: minmax(0,1.35fr) minmax(280px,.65fr); gap: 16px; align-items: start; }
.assessment-rubric { border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.assessment-rubric > summary { display: grid; gap: 4px; padding: 18px; cursor: pointer; }
.rubric-dimension-list { display: grid; gap: 10px; }
.rubric-dimension-list article { display: grid; grid-template-columns: 140px minmax(180px,1fr) 80px 80px; gap: 8px; padding: 12px; border-radius: 10px; background: var(--surface-warm); }
.rubric-dimension-list .wide { grid-column: 1 / -1; }
.assessment-run-panel { position: sticky; top: 90px; display: grid; gap: 12px; padding: 22px; border-radius: var(--radius); color: #fff; background: linear-gradient(145deg,#3f4d7c,#252c4b); box-shadow: var(--shadow-md); }
.assessment-run-panel h2, .assessment-run-panel p { margin: 0; }
.assessment-run-panel small { color: rgba(255,255,255,.75); }
.evaluation-list { display: grid; gap: 14px; margin-top: 32px; }
.evaluation-card { display: grid; gap: 15px; padding: 22px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow-sm); }
.evaluation-card > header { display: flex; justify-content: space-between; gap: 12px; }
.evaluation-card > header > div { display: grid; gap: 3px; }
.evaluation-ai-summary { padding: 13px; border-radius: 10px; background: #f2f3f8; }
.evaluation-ai-summary p { margin: 0 0 5px; }
.evaluation-score-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 10px; }
.evaluation-score-grid label { display: grid; gap: 6px; padding: 11px; border-radius: 10px; background: var(--surface-warm); }
.evaluation-review-form { display: grid; gap: 13px; }
.feedback-hero { grid-template-columns: 220px minmax(0,1fr); align-items: center; }
.feedback-hero > div { display: grid; gap: 4px; justify-items: center; padding: 20px; border-radius: 12px; color: #fff; background: var(--brand); }
.feedback-hero > div strong { font-size: 42px; }
.feedback-hero blockquote { margin: 0; font-size: 18px; line-height: 1.8; }
.quality-row-list { display: grid; gap: 10px; }
.quality-row-list a { display: grid; grid-template-columns: minmax(0,1fr) auto auto; gap: 14px; align-items: center; padding: 15px; border: 1px solid var(--line); border-radius: 11px; background: var(--surface); }
.quality-row-list a > div { display: grid; gap: 4px; }
.quality-row-list small { color: var(--muted); }
.quality-row-list em { color: var(--evidence); font-size: 11px; font-style: normal; }

@media (max-width: 880px) {
  .student-identity-grid, .guide-card-grid, .guide-overview-grid, .discussion-room-grid, .discussion-brief, .unit-question-grid, .diagnosis-layout, .student-diagnosis-summary, .collaboration-source-pack, .argument-editor-panel, .assessment-layout, .feedback-hero { grid-template-columns: 1fr; }
  .guide-item-editor { grid-template-columns: 34px 1fr; }
  .guide-item-editor textarea, .guide-item-editor .text-button { grid-column: 2; }
  .guide-item-options { grid-column: 2; grid-template-columns: repeat(2,minmax(0,1fr)); }
  .guide-item-options .wide { grid-column: span 2; }
  .diagnosis-run-panel { position: static; }
  .assessment-run-panel { position: static; }
  .discussion-evidence-list { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  .guide-detail-heading, .guide-task-title, .guide-progress-row summary, .discussion-heading, .discussion-post > header, .discussion-reply > header { align-items: flex-start; flex-direction: column; }
  .guide-task-card { grid-template-columns: 1fr; padding: 20px; }
  .guide-meta { grid-template-columns: 1fr; }
  .workflow-question-head, .workflow-link-options, .class-diagnosis-grid, .diagnosis-point-grid, .task-source-pack { grid-template-columns: 1fr; }
  .guide-item-options { grid-template-columns: 1fr; }
  .guide-item-options .wide, .task-source-pack > strong, .task-source-pack > small { grid-column: 1; }
  .guide-submit-actions { align-items: stretch; flex-direction: column; }
  .discussion-brief dl { grid-template-columns: 1fr; }
  .discussion-compose, .discussion-post { padding: 18px; }
  .discussion-claim, .discussion-reasoning { grid-template-columns: 1fr; gap: 4px; }
  .discussion-replies, .discussion-reply-box { margin-left: 0; }
  .learning-group-grid, .argument-version-grid, .feedback-dimension-grid, .quality-metric-grid, .evaluation-score-grid, .source-checkbox-grid, .group-member-picker { grid-template-columns: 1fr; }
  .rubric-dimension-list article { grid-template-columns: 1fr; }
  .rubric-dimension-list .wide { grid-column: 1; }
  .group-member-picker > div, .quality-row-list a { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal-ready { opacity: 1; transform: none; }
}

/* Stage 33: transfer learning, portfolio, and teacher-controlled identities */
.stage33-page { display: grid; gap: 22px; }
.stage33-summary-grid, .portfolio-metrics { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 12px; }
.stage33-summary-grid article, .portfolio-metrics article { display: grid; gap: 4px; padding: 18px; border: 1px solid var(--line); border-radius: 14px; background: linear-gradient(145deg,#fff,var(--surface-warm)); }
.stage33-summary-grid strong, .portfolio-metrics strong { color: var(--brand); font-family: var(--font-display); font-size: 30px; }
.stage33-summary-grid span, .portfolio-metrics span { color: var(--muted); font-size: 12px; font-weight: 750; }
.stage33-editor, .identity-class-card { overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow-sm); }
.stage33-editor > summary, .identity-class-card > summary { padding: 18px 22px; cursor: pointer; font-weight: 800; }
.stage33-editor > .form-panel { border: 0; border-top: 1px solid var(--line); border-radius: 0; box-shadow: none; }
.stage33-source-picker { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 10px; }
.stage33-source-picker label { display: grid; grid-template-columns: 20px minmax(0,1fr); gap: 9px; align-items: start; padding: 12px; border: 1px solid var(--line); border-radius: 11px; background: var(--surface-warm); }
.stage33-source-picker input { width: 17px !important; min-height: 17px !important; margin-top: 3px; }
.stage33-source-picker label > span { display: grid; gap: 4px; }
.stage33-source-picker small { color: var(--muted); font-weight: 500; }
.inline-check { display: flex !important; grid-template-columns: none !important; align-items: center; gap: 10px !important; }
.inline-check input { width: 18px !important; min-height: 18px !important; }
.stage33-template-list, .stage33-submission-list, .stage33-revision-list, .identity-class-list, .identity-import-log { display: grid; gap: 14px; }
.stage33-template-card { display: grid; gap: 16px; padding: 24px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow-sm); }
.stage33-template-card > header, .identity-import-log article > header { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; }
.stage33-template-card h2, .stage33-template-card p, .identity-import-log p { margin: 0; }
.stage33-template-card blockquote { margin: 0; padding: 16px 18px; border-left: 4px solid var(--brand); border-radius: 0 12px 12px 0; background: var(--surface-warm); color: var(--text-2); line-height: 1.75; white-space: pre-wrap; }
.stage33-prompt { line-height: 1.8; white-space: pre-wrap; }
.stage33-teacher-controls, .teacher-feedback-strip { display: grid; gap: 10px; padding: 14px 16px; border-radius: 12px; background: #f6f0e8; }
.stage33-submission-list { padding-top: 16px; border-top: 1px dashed var(--line); }
.stage33-revision-list { padding: 0 18px 16px; }
.stage33-revision-list article, .portfolio-revision { padding: 13px; border-radius: 10px; background: var(--surface-warm); }
.stage33-revision-list header { display: flex; justify-content: space-between; gap: 12px; }
.stage33-revision-list p { margin: 7px 0; white-space: pre-wrap; }
.stage33-version-timeline { display: flex; flex-wrap: wrap; gap: 8px; }
.stage33-version-timeline span { padding: 7px 10px; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); font-size: 12px; }
.stage33-version-timeline .is-current { border-color: var(--brand); color: var(--brand); background: rgba(114,27,40,.05); font-weight: 800; }
.portfolio-selector { display: flex; gap: 12px; align-items: end; padding: 16px; border: 1px solid var(--line); border-radius: 14px; background: var(--surface); }
.portfolio-selector label { display: grid; gap: 6px; min-width: min(100%,360px); }
.portfolio-selector select { min-height: 44px; padding: 0 12px; border: 1px solid var(--line-strong); border-radius: 10px; background: #fff; }
.portfolio-identity { display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 20px; border-radius: var(--radius); color: #fff; background: linear-gradient(120deg,var(--brand-dark),var(--brand)); }
.portfolio-identity > div:first-child { display: flex; align-items: center; gap: 12px; }
.portfolio-identity > div:first-child div { display: grid; gap: 3px; }
.portfolio-identity .profile-avatar { background: rgba(255,255,255,.18); color: #fff; }
.portfolio-identity small { color: rgba(255,255,255,.72); }
.portfolio-identity .button.secondary { border-color: rgba(255,255,255,.45); color: #fff; background: rgba(255,255,255,.08); }
.portfolio-metrics { grid-template-columns: repeat(5,minmax(0,1fr)); }
.portfolio-section-list { display: grid; gap: 12px; }
.portfolio-section-list > details { overflow: hidden; border: 1px solid var(--line); border-radius: 14px; background: var(--surface); box-shadow: var(--shadow-sm); }
.portfolio-section-list > details > summary { display: grid; grid-template-columns: 38px minmax(0,1fr) auto; align-items: center; gap: 10px; padding: 16px 18px; cursor: pointer; }
.portfolio-section-list > details > summary span { display: grid; place-items: center; width: 32px; height: 32px; border-radius: 50%; color: #fff; background: var(--brand); font-size: 11px; font-weight: 800; }
.portfolio-section-list > details > summary em { color: var(--muted); font-size: 12px; font-style: normal; }
.portfolio-section-list > details > div { display: grid; gap: 10px; padding: 0 18px 18px 66px; }
.portfolio-section-list article { padding: 14px; border-radius: 11px; background: var(--surface-warm); }
.portfolio-section-list h3, .portfolio-section-list p { margin: 0 0 7px; }
.portfolio-section-list p { color: var(--text-2); line-height: 1.7; white-space: pre-wrap; }
.portfolio-source-grid { display: grid !important; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 10px !important; }
.portfolio-source-grid a { display: grid; gap: 5px; padding: 13px; border: 1px solid var(--line); border-radius: 11px; color: inherit; }
.portfolio-source-grid a > span { color: var(--brand); font-size: 12px; font-weight: 800; }
.portfolio-source-grid small { color: var(--muted); }
.identity-action-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 16px; align-items: start; }
.identity-import-form { grid-column: 1 / -1; }
.identity-import-form ol { margin: 0; padding-left: 22px; color: var(--text-2); line-height: 1.8; }
.identity-class-card > summary { display: flex; justify-content: space-between; align-items: center; gap: 14px; }
.identity-class-card > summary div { display: grid; gap: 4px; }
.identity-class-card > summary small { color: var(--muted); font-weight: 500; }
.identity-student-table { padding: 0 18px 18px; overflow-x: auto; }
.identity-student-row { display: grid; grid-template-columns: minmax(130px,1.2fr) minmax(90px,1fr) 90px 100px; gap: 12px; align-items: center; min-width: 540px; padding: 11px 8px; border-top: 1px solid var(--line); }
.identity-table-head { color: var(--muted); font-size: 11px; font-weight: 800; }
.identity-import-log article { padding: 18px; border: 1px solid var(--line); border-radius: 13px; background: var(--surface); }
.identity-import-log header > div { display: grid; gap: 4px; }
.identity-import-log small { color: var(--muted); }
.identity-import-log ul { margin: 10px 0 0; color: #84242f; line-height: 1.7; }
.muted-copy { color: var(--muted); }

@media (max-width: 880px) {
  .stage33-summary-grid, .portfolio-metrics { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .stage33-source-picker, .portfolio-source-grid, .identity-action-grid { grid-template-columns: 1fr; }
  .identity-import-form { grid-column: 1; }
  .portfolio-identity { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 620px) {
  .stage33-summary-grid, .portfolio-metrics { grid-template-columns: 1fr 1fr; }
  .stage33-template-card { padding: 18px; }
  .stage33-template-card > header, .identity-import-log article > header, .identity-class-card > summary, .portfolio-selector { align-items: stretch; flex-direction: column; }
  .portfolio-section-list > details > div { padding-left: 18px; }
  .portfolio-section-list > details > summary { grid-template-columns: 34px minmax(0,1fr); }
  .portfolio-section-list > details > summary em { grid-column: 2; }
}