:root {
  color-scheme: dark;
  --bg: #071014;
  --panel: rgba(13, 31, 38, 0.82);
  --panel-2: rgba(18, 45, 56, 0.9);
  --panel-3: rgba(255, 255, 255, 0.06);
  --text: #eef9fb;
  --muted: #9cb9c0;
  --line: rgba(255,255,255,0.12);
  --accent: #59f3c7;
  --accent-2: #7aa7ff;
  --warn: #ffd166;
  --bad: #ff8a8a;
  --good: #6dffb2;
  --shadow: 0 24px 70px rgba(0,0,0,0.35);
  --radius: 22px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(circle at 15% 10%, rgba(89, 243, 199, .16), transparent 32rem),
    radial-gradient(circle at 85% 0%, rgba(122, 167, 255, .16), transparent 28rem),
    linear-gradient(135deg, #051014 0%, #071014 48%, #0b1820 100%);
  color: var(--text);
  min-height: 100vh;
}
a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; }
button { cursor: pointer; }
.shell { width: min(1480px, calc(100% - 32px)); margin: 0 auto; }
.topbar {
  position: sticky; top: 0; z-index: 50; display: flex; gap: 18px; align-items: center; justify-content: space-between;
  padding: 18px 0; backdrop-filter: blur(18px);
}
.brand { display: inline-flex; align-items: center; gap: 12px; min-width: max-content; }
.brand-mark { display: grid; place-items: center; width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 16px; background: linear-gradient(135deg, rgba(89,243,199,.24), rgba(122,167,255,.14)); box-shadow: var(--shadow); font-weight: 900; }
.brand small { display: block; color: var(--muted); font-size: .76rem; margin-top: 2px; }
.nav { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 8px; }
.nav a, .search-trigger, .ghost-btn, .tab-btn, .copy-btn, .filter-btn, .primary-btn {
  border: 1px solid var(--line); color: var(--text); background: rgba(255,255,255,.055); border-radius: 999px; padding: 10px 14px;
}
.nav a.active, .tab-btn.active, .filter-btn.active, .primary-btn { background: linear-gradient(135deg, rgba(89,243,199,.22), rgba(122,167,255,.18)); border-color: rgba(89,243,199,.42); }
.search-trigger { white-space: nowrap; }
#app { padding: 20px 0 80px; }
.hero {
  display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(320px, .7fr); gap: 22px; align-items: stretch;
}
.hero-card, .panel, .volume-card, .metric-card, .search-dialog, .loading-card {
  border: 1px solid var(--line); background: var(--panel); box-shadow: var(--shadow); border-radius: var(--radius);
}
.hero-card { padding: clamp(24px, 4vw, 52px); position: relative; overflow: hidden; }
.hero-card:before { content: ""; position: absolute; inset: -40% -20% auto auto; width: 420px; height: 420px; border-radius: 50%; background: radial-gradient(circle, rgba(89,243,199,.14), transparent 70%); }
.eyebrow { color: var(--accent); text-transform: uppercase; letter-spacing: .12em; font-weight: 800; font-size: .8rem; }
h1 { font-size: clamp(2rem, 6vw, 5.4rem); line-height: .96; letter-spacing: -.06em; margin: 14px 0; }
h2 { font-size: clamp(1.5rem, 3vw, 2.4rem); letter-spacing: -.04em; margin: 0 0 14px; }
h3 { margin: 0 0 8px; }
p { color: var(--muted); line-height: 1.65; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; }
.metric-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.metric-card { padding: 18px; }
.metric-card strong { display: block; font-size: clamp(1.7rem, 4vw, 3rem); letter-spacing: -.04em; }
.metric-card span { color: var(--muted); }
.section { margin-top: 28px; }
.section-head { display:flex; justify-content: space-between; gap: 18px; align-items: end; margin-bottom: 16px; }
.section-head p { max-width: 820px; margin: 0; }
.grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 16px; }
.volume-card { grid-column: span 4; padding: 20px; display: flex; flex-direction: column; gap: 14px; min-height: 260px; transition: transform .18s ease, border-color .18s ease; }
.volume-card:hover { transform: translateY(-4px); border-color: rgba(89,243,199,.42); }
.card-top { display:flex; justify-content: space-between; gap: 12px; align-items: start; }
.badge { display: inline-flex; align-items:center; gap: 6px; border:1px solid var(--line); background: rgba(255,255,255,.055); color: var(--muted); border-radius: 999px; padding: 6px 9px; font-size: .78rem; }
.badge.good { color: var(--good); border-color: rgba(109,255,178,.32); }
.badge.warn { color: var(--warn); border-color: rgba(255,209,102,.36); }
.badge.bad { color: var(--bad); border-color: rgba(255,138,138,.36); }
.tag-row { display:flex; flex-wrap: wrap; gap: 8px; }
.stats-row { display:grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin-top: auto; }
.stat { background: rgba(255,255,255,.05); border-radius: 14px; padding: 10px; border: 1px solid rgba(255,255,255,.08); }
.stat strong { display:block; }
.stat span { color: var(--muted); font-size: .76rem; }
.panel { padding: 20px; }
.filters { display:flex; gap: 10px; flex-wrap: wrap; }
.volume-layout { display: grid; grid-template-columns: minmax(260px, 320px) minmax(0, 1fr); gap: 18px; }
.side-panel { position: sticky; top: 86px; align-self: start; }
.volume-title { display:flex; align-items:start; justify-content:space-between; gap: 16px; }
.tabs { display:flex; gap: 8px; flex-wrap:wrap; margin: 18px 0; }
.tab-content { display:grid; gap: 16px; }
.timeline { display:grid; gap: 12px; }
.lesson, .lab, .material, .slide-card, .prompt-card, .check-item { border:1px solid var(--line); background: rgba(255,255,255,.045); border-radius: 18px; padding: 16px; }
.lesson { display:grid; grid-template-columns: 72px minmax(0,1fr); gap: 14px; }
.lesson-num { display:grid; place-items:center; height: 54px; border-radius: 18px; background: rgba(89,243,199,.12); color: var(--accent); font-weight: 900; }
.lab-grid { display:grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 14px; }
.lab details { margin-top: 10px; }
.lab summary { cursor:pointer; color: var(--accent); }
.material-controls { display:flex; gap: 12px; flex-wrap: wrap; margin-bottom: 14px; }
.material-controls input, .material-controls select, .search-box input {
  border:1px solid var(--line); background: rgba(255,255,255,.07); color: var(--text); border-radius: 14px; padding: 12px 14px; outline: none;
}
.material-controls input { flex: 1; min-width: 260px; }
.material-list { display:grid; gap: 10px; max-height: 720px; overflow:auto; padding-right: 4px; }
.material { display:grid; grid-template-columns: minmax(0,1fr) auto; gap: 12px; align-items:center; }
.material small { color: var(--muted); overflow-wrap: anywhere; }
.deck-layout { display:grid; grid-template-columns: minmax(220px, .34fr) minmax(0, .66fr); gap: 14px; }
.deck-list { display:grid; gap: 8px; max-height: 700px; overflow:auto; }
.slide-stage { min-height: 430px; display:grid; align-content:center; gap: 18px; background: radial-gradient(circle at 20% 20%, rgba(89,243,199,.12), transparent 40%), rgba(255,255,255,.045); border:1px solid var(--line); border-radius: 24px; padding: 32px; }
.slide-stage h2 { font-size: clamp(1.6rem, 4vw, 3.4rem); }
.slide-stage li { margin: 12px 0; color: #d7edf1; line-height:1.5; }
.slide-controls { display:flex; gap:10px; flex-wrap:wrap; }
.markdown-box { border:1px solid var(--line); border-radius: 18px; background: rgba(255,255,255,.04); padding: 18px; max-height: 560px; overflow:auto; white-space: pre-wrap; color: #d6e8ec; line-height:1.55; }
.prompt-grid { display:grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 14px; }
.prompt-card pre { white-space: pre-wrap; max-height: 320px; overflow:auto; color: #d8eff0; background: rgba(0,0,0,.18); padding: 14px; border-radius: 14px; border:1px solid rgba(255,255,255,.08); }
.checklist { display:grid; gap: 8px; max-height: 620px; overflow:auto; }
.check-item { display:flex; gap: 10px; align-items:flex-start; }
.progress-bar { height: 10px; border-radius: 999px; background: rgba(255,255,255,.08); overflow:hidden; }
.progress-bar > span { display:block; height:100%; width:0; background: linear-gradient(90deg, var(--accent), var(--accent-2)); }
.search-dialog { width: min(860px, calc(100% - 30px)); padding: 0; color: var(--text); }
.search-dialog::backdrop { background: rgba(0,0,0,.62); backdrop-filter: blur(5px); }
.search-box { display:grid; grid-template-columns: minmax(0,1fr) auto; gap: 10px; padding: 18px; border-bottom:1px solid var(--line); }
.search-box label { grid-column: 1 / -1; color: var(--muted); }
.search-box button { border:1px solid var(--line); background: rgba(255,255,255,.08); color: var(--text); border-radius: 12px; padding: 0 14px; }
.search-results { padding: 12px; max-height: 70vh; overflow:auto; }
.search-result { display:block; padding: 14px; border-radius: 16px; border:1px solid transparent; }
.search-result:hover { background: rgba(255,255,255,.06); border-color: var(--line); }
.toast { position: fixed; right: 18px; bottom: 18px; background: rgba(7,16,20,.94); color: var(--text); border:1px solid var(--line); box-shadow: var(--shadow); padding: 12px 16px; border-radius: 999px; opacity:0; transform: translateY(12px); transition: .2s ease; pointer-events:none; }
.toast.show { opacity:1; transform: translateY(0); }
.loading-card { margin: 12vh auto; padding: 40px; text-align:center; max-width: 620px; }
.pulse { width: 54px; height: 54px; margin: 0 auto 18px; border-radius: 50%; background: radial-gradient(circle, var(--accent), transparent 70%); animation: pulse 1.4s infinite; }
@keyframes pulse { 0%,100% { transform: scale(.8); opacity:.55;} 50% { transform: scale(1.15); opacity:1;} }
@media (max-width: 1120px) { .hero, .volume-layout, .deck-layout { grid-template-columns: 1fr; } .side-panel { position: static; } .volume-card { grid-column: span 6; } }
@media (max-width: 720px) { .shell { width: min(100% - 20px, 1480px); } .topbar { align-items:flex-start; flex-direction:column; } .nav { justify-content:flex-start; } .volume-card { grid-column: span 12; } .metric-grid, .lab-grid, .prompt-grid { grid-template-columns: 1fr; } .lesson { grid-template-columns: 1fr; } h1 { font-size: 2.6rem; } }