.preview-ribbon { display:flex; align-items:center; gap:12px; min-height:54px; padding:8px max(20px, calc((100vw - var(--page-max)) / 2)); color:var(--player-ink); background:var(--player); }
.ribbon-mark { display:grid; place-items:center; flex:0 0 34px; height:30px; border-radius:9px; color:var(--player); background:var(--player-progress); font-size:12px; font-weight:800; }
.preview-ribbon strong,.preview-ribbon small { display:block; }
.preview-ribbon strong { font-size:13px; }
.preview-ribbon small { color:#c7d0ca; font-size:11px; }
.preview-status { margin-left:auto; color:#d6e78c; font-size:12px; }
.site-header { position:sticky; z-index:20; top:0; display:flex; align-items:center; gap:28px; min-height:72px; padding:0 max(24px, calc((100vw - var(--page-max)) / 2)); border-bottom:1px solid var(--line); background:color-mix(in srgb, var(--surface) 94%, transparent); backdrop-filter:blur(14px); }
.brand { display:flex; align-items:center; gap:11px; min-width:190px; color:var(--ink); text-decoration:none; font-weight:750; letter-spacing:-.02em; }
.brand-mark { display:grid; place-items:center; width:38px; height:38px; border:1px solid var(--accent); border-radius:12px; color:var(--accent); font:700 19px var(--font-serif); }
.brand small { display:block; color:var(--ink-weak); font-size:9px; font-weight:650; letter-spacing:.15em; }
.desktop-nav { display:flex; min-width:0; flex:1 1 auto; align-self:stretch; gap:2px; overflow-x:auto; scrollbar-width:none; }
.desktop-nav::-webkit-scrollbar { display:none; }
.desktop-nav a { display:flex; flex:0 0 auto; align-items:center; padding:0 9px; border-bottom:2px solid transparent; color:var(--ink-muted); font-size:13px; text-decoration:none; white-space:nowrap; transition:color var(--motion-fast),border-color var(--motion-fast); }
.desktop-nav a:hover,.desktop-nav a[aria-current="page"] { color:var(--ink); border-bottom-color:var(--accent); }
.header-tools { display:flex; align-items:center; gap:10px; margin-left:auto; }
.header-tools .quiet { display:flex; align-items:center; gap:8px; color:var(--ink-muted); font-size:13px; }
.avatar { display:grid; place-items:center; width:34px; height:34px; border-radius:50%; color:var(--accent-hover); background:var(--accent-soft); font-weight:700; }
.button { display:inline-flex; align-items:center; justify-content:center; gap:8px; min-height:44px; padding:0 17px; border:1px solid var(--line-strong); border-radius:var(--radius-sm); color:var(--ink); background:var(--surface); font-size:14px; font-weight:650; text-decoration:none; cursor:pointer; transition:transform var(--motion-fast),background var(--motion-fast),border-color var(--motion-fast); }
.button:hover { border-color:var(--accent); background:var(--accent-soft); }
.button:active { transform:translateY(1px); }
.button.primary { border-color:var(--accent); color:#fffefa; background:var(--accent); }
.button.primary:hover { border-color:var(--accent-hover); background:var(--accent-hover); }
.button.text { border-color:transparent; color:var(--accent); background:transparent; }
.button:disabled { opacity:.55; cursor:not-allowed; }
.icon { display:inline-grid; place-items:center; width:20px; height:20px; }
.icon svg { width:100%; height:100%; fill:none; stroke:currentColor; stroke-width:1.7; stroke-linecap:round; stroke-linejoin:round; }
.page { width:min(100%, var(--page-max)); margin:0 auto; padding:36px 28px 96px; }
.breadcrumb { display:flex; align-items:center; gap:9px; color:var(--ink-weak); font-size:12px; }
.eyebrow { color:var(--accent); font-size:11px; font-weight:760; letter-spacing:.12em; text-transform:uppercase; }
.page-heading { display:flex; align-items:flex-end; justify-content:space-between; gap:24px; margin:22px 0 30px; }
.page-heading h1 { margin:5px 0 7px; font-size:clamp(30px,4vw,44px); line-height:1.13; letter-spacing:-.045em; }
.page-heading p { max-width:620px; margin:0; color:var(--ink-muted); font-size:15px; }
.section { margin-top:36px; }
.section-heading { display:flex; align-items:flex-end; justify-content:space-between; gap:16px; margin-bottom:14px; }
.section-heading h2 { margin:0; font-size:20px; letter-spacing:-.025em; }
.section-heading p { margin:4px 0 0; color:var(--ink-weak); font-size:13px; }
.section-kicker { color:var(--ink-weak); font-size:12px; }
.hero-grid { display:grid; grid-template-columns:minmax(0,1.1fr) minmax(300px,.9fr); gap:20px; }
.hero-panel { padding:28px 30px; border:1px solid var(--line); border-radius:var(--radius-lg); background:var(--surface); box-shadow:var(--shadow-1); }
.hero-panel h1 { max-width:680px; margin:9px 0 12px; font-size:clamp(34px,4vw,54px); line-height:1.08; letter-spacing:-.05em; }
.hero-panel p { max-width:590px; margin:0; color:var(--ink-muted); }
.hero-actions { display:flex; flex-wrap:wrap; gap:10px; margin-top:22px; }
.daily-feature { display:flex; flex-direction:column; justify-content:space-between; min-height:238px; padding:25px 28px; border-radius:var(--radius-lg); color:var(--player-ink); background:var(--player); }
.daily-feature .eyebrow { color:var(--player-progress); }
.daily-feature h2 { margin:25px 0 7px; color:#f3eabf; font:700 clamp(25px,3vw,36px)/1.2 var(--font-serif); }
.daily-feature p { margin:0; color:#d8dfd9; }
.daily-feature .feature-footer { display:flex; justify-content:space-between; gap:12px; margin-top:24px; padding-top:14px; border-top:1px solid #ffffff24; color:#d6e78c; font-size:12px; }
.catalog-grid { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:14px; }
.catalog-toolbar { display:flex; align-items:center; justify-content:space-between; gap:14px; margin-bottom:14px; }
.source-note { margin:0 0 12px; padding:10px 13px; border-left:3px solid var(--info); border-radius:0 var(--radius-sm) var(--radius-sm) 0; color:var(--ink-muted); background:var(--info-soft); font-size:12px; }
.source-note.error-note { border-left-color:var(--danger); color:var(--danger); background:var(--danger-soft); }
.search-field { position:relative; display:flex; align-items:center; width:min(100%,420px); }
.search-field input { width:100%; min-height:44px; padding:0 42px 0 14px; border:1px solid var(--line-strong); border-radius:var(--radius-sm); color:var(--ink); background:var(--surface); }
.search-field input::placeholder { color:var(--ink-weak); }
.search-hint { position:absolute; right:13px; display:grid; width:20px; height:20px; color:var(--ink-weak); pointer-events:none; }
.course-card { display:flex; flex-direction:column; min-height:204px; padding:18px; border:1px solid var(--line); border-radius:var(--radius-md); background:var(--surface); box-shadow:var(--shadow-1); }
.course-card:hover { border-color:var(--line-strong); box-shadow:var(--shadow-2); }
.course-card h3 { margin:9px 0 6px; font-size:17px; line-height:1.4; }
.course-card p { flex:1; margin:0; color:var(--ink-muted); font-size:13px; }
.course-meta { display:flex; align-items:center; justify-content:space-between; gap:12px; margin-top:17px; color:var(--ink-weak); font-size:12px; }
.badge { display:inline-flex; align-items:center; gap:6px; width:max-content; min-height:26px; padding:3px 9px; border-radius:var(--radius-pill); color:var(--accent-hover); background:var(--accent-soft); font-size:11px; font-weight:700; }
.badge.success { color:var(--success); background:var(--success-soft); }
.badge.warning { color:var(--warning); background:var(--warning-soft); }
.badge.danger { color:var(--danger); background:var(--danger-soft); }
.badge.info { color:var(--info); background:var(--info-soft); }
.badge.neutral { color:var(--ink-muted); background:var(--surface-soft); }
.state-dot { width:7px; height:7px; border-radius:50%; background:currentColor; }
.two-column { display:grid; grid-template-columns:minmax(0,1.25fr) minmax(280px,.75fr); gap:18px; }
.panel { padding:20px; border:1px solid var(--line); border-radius:var(--radius-md); background:var(--surface); box-shadow:var(--shadow-1); }
.panel h3 { margin:0 0 12px; font-size:16px; }
.panel p { color:var(--ink-muted); }
.status-list { display:grid; gap:10px; }
.status-row { display:flex; align-items:flex-start; gap:12px; padding:12px; border-radius:var(--radius-sm); background:var(--surface-soft); }
.status-row .icon { flex:0 0 20px; color:var(--accent); }
.status-row strong,.status-row small { display:block; }
.status-row small { margin-top:2px; color:var(--ink-muted); font-size:12px; }
.button-row { display:flex; flex-wrap:wrap; gap:9px; }
.skeleton { position:relative; overflow:hidden; min-height:14px; border-radius:6px; background:var(--surface-soft); }
.skeleton::after { position:absolute; inset:0; content:""; transform:translateX(-100%); background:linear-gradient(90deg,transparent,#ffffff99,transparent); animation:skeleton-wave 1.25s infinite; }
@keyframes skeleton-wave { to { transform:translateX(100%); } }
.empty-state,.error-state { display:grid; justify-items:start; gap:8px; padding:18px; border:1px dashed var(--line-strong); border-radius:var(--radius-md); background:var(--surface); }
.empty-state p,.error-state p { margin:0; color:var(--ink-muted); font-size:13px; }
.error-state { border-color:#dba69f; background:var(--danger-soft); }
.error-state h3 { margin:0; color:var(--danger); font-size:15px; }
.error-state p { color:#774c46; }
.player-demo { display:flex; align-items:center; justify-content:space-between; gap:18px; padding:17px 18px; border-radius:var(--radius-md); color:var(--player-ink); background:var(--player); }
.player-demo h3 { margin:0; color:#f3eabf; font:700 20px var(--font-serif); }
.player-demo p { margin:4px 0 0; color:#d8dfd9; font-size:12px; }
.player-demo audio { width:min(100%,320px); accent-color:var(--player-progress); }
.component-grid { display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:12px; }
.component-sample { min-height:130px; padding:16px; border:1px solid var(--line); border-radius:var(--radius-md); background:var(--surface); }
.component-sample h3 { margin:0 0 12px; font-size:13px; }
.component-sample p { margin:0 0 12px; color:var(--ink-muted); font-size:12px; }
.filter-group { display:flex; flex-wrap:wrap; gap:6px; }
.filter-chip { min-height:36px; padding:0 12px; border:1px solid var(--line); border-radius:var(--radius-pill); color:var(--ink-muted); background:var(--surface); cursor:pointer; }
.filter-chip[aria-pressed="true"] { border-color:var(--accent); color:var(--accent-hover); background:var(--accent-soft); }
.toast { position:fixed; z-index:50; right:20px; bottom:20px; max-width:min(440px,calc(100vw - 40px)); padding:12px 16px; border:1px solid #ffffff44; border-radius:var(--radius-sm); color:#fffefa; background:var(--player); box-shadow:var(--shadow-2); }
.site-footer { display:flex; justify-content:space-between; gap:20px; padding:22px 28px; border-top:1px solid var(--line); color:var(--ink-weak); font-size:12px; }
.site-footer a { color:var(--accent); }
.notice-note { margin-top:16px; padding:11px 13px; border-left:3px solid var(--info); color:var(--ink-muted); background:var(--info-soft); font-size:12px; }
.confirm-dialog { width:min(440px,calc(100vw - 32px)); padding:24px; border:1px solid var(--line); border-radius:var(--radius-lg); color:var(--ink); background:var(--surface); box-shadow:var(--shadow-2); }
.confirm-dialog::backdrop { background:rgb(23 40 36 / 45%); backdrop-filter:blur(2px); }
.confirm-dialog h2 { margin:7px 0; font-size:22px; }
.confirm-dialog p { color:var(--ink-muted); font-size:14px; }
.confirm-dialog .button-row { justify-content:flex-end; margin-top:20px; }
.mobile-nav { display:none; }
.sr-only { position:absolute; width:1px; height:1px; padding:0; overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0; }
.loading-shell { min-height:60vh; display:grid; place-items:center; color:var(--ink-muted); }

@media (max-width:1000px) {
  .site-header { gap:11px; padding-inline:18px; }
  .brand { min-width:auto; flex:0 0 auto; }
  .desktop-nav a { padding-inline:10px; font-size:13px; }
  .site-header .header-tools .quiet { display:none; }
  .catalog-grid { grid-template-columns:repeat(2,minmax(0,1fr)); }
  .component-grid { grid-template-columns:repeat(2,minmax(0,1fr)); }
}
@media (max-width:720px) {
  body { font-size:15px; }
  .preview-ribbon { min-height:56px; padding:8px 14px; }
  .preview-ribbon small { max-width:230px; font-size:10px; }
  .preview-status { display:none; }
  .site-header { position:relative; min-height:60px; padding:0 15px; }
  .brand-mark { width:34px; height:34px; }
  .desktop-nav,.header-tools { display:none; }
  .page { padding:22px 16px 108px; }
  .page-heading { align-items:flex-start; flex-direction:column; gap:12px; margin:18px 0 22px; }
  .page-heading h1 { font-size:32px; }
  .hero-grid,.two-column { grid-template-columns:1fr; }
  .hero-panel { padding:22px 19px; }
  .hero-panel h1 { font-size:36px; }
  .daily-feature { min-height:205px; padding:21px; }
  .catalog-grid { grid-template-columns:1fr; }
  .course-card { min-height:170px; }
  .component-grid { grid-template-columns:repeat(2,minmax(0,1fr)); gap:8px; }
  .catalog-toolbar { align-items:stretch; flex-direction:column; }
  .search-field { width:100%; }
  .component-sample { min-height:135px; padding:12px; }
  .player-demo { align-items:flex-start; flex-direction:column; }
  .player-demo audio { width:100%; }
  .site-footer { flex-direction:column; gap:6px; padding:16px; }
  .mobile-nav { position:fixed; z-index:30; inset:auto 0 0; display:grid; grid-template-columns:repeat(4,1fr); padding:6px 6px calc(7px + env(safe-area-inset-bottom)); border-top:1px solid var(--line); background:color-mix(in srgb,var(--surface) 95%,transparent); backdrop-filter:blur(14px); }
  .mobile-nav a { display:flex; min-height:48px; flex-direction:column; align-items:center; justify-content:center; gap:3px; color:var(--ink-weak); font-size:10px; text-decoration:none; }
  .mobile-nav a[aria-current="page"] { color:var(--accent); font-weight:700; }
  .mobile-nav .icon { width:20px; height:20px; }
  .toast { right:12px; bottom:calc(72px + env(safe-area-inset-bottom)); }
}