:root {
  --bg: oklch(98.5% 0.006 240);
  --surface: oklch(100% 0 0);
  --fg: oklch(20% 0.018 250);
  --muted: oklch(53% 0.018 250);
  --border: oklch(90% 0.012 240);
  --accent: oklch(58% 0.16 232);
  --accent-soft: color-mix(in oklch, var(--accent) 12%, transparent);
  --green: oklch(60% 0.14 155);
  --amber: oklch(72% 0.14 82);
  --danger: oklch(58% 0.16 25);
  --font-display: 'Iowan Old Style', 'Charter', Georgia, serif;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-mono: ui-monospace, 'SF Mono', Menlo, monospace;
  --container: 1180px;
  --gutter: clamp(18px, 3vw, 36px);
  --r: 12px;
  --shadow: 0 18px 44px color-mix(in oklch, var(--fg) 8%, transparent);
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 15px/1.55 var(--font-body); }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; }
button { cursor: pointer; }
h1,h2,h3,h4,p { margin: 0; text-wrap: pretty; }
h1,h2,h3,h4 { text-wrap: balance; }
h1,h2 { font-family: var(--font-display); letter-spacing: -.025em; line-height: 1.05; }
h1 { font-size: clamp(42px, 6vw, 76px); }
h2 { font-size: clamp(30px, 4vw, 48px); }
h3 { font-size: 18px; line-height: 1.3; }
.container { width: min(var(--container), calc(100% - var(--gutter) * 2)); margin: 0 auto; }
.topbar { position: sticky; top: 0; z-index: 20; background: color-mix(in oklch, var(--bg) 90%, transparent); backdrop-filter: blur(16px); border-bottom: 1px solid var(--border); }
.topbar-inner { min-height: 68px; display: flex; align-items: center; gap: 28px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 750; letter-spacing: -.03em; font-size: 18px; cursor: pointer; }
.brand-mark { width: 28px; height: 28px; border-radius: 9px; display: grid; place-items: center; color: var(--surface); background: var(--fg); font-family: var(--font-mono); font-size: 12px; }
.mainnav { display: flex; gap: 22px; color: var(--muted); }
.mainnav a:hover, .mainnav a[aria-current="page"] { color: var(--fg); }
.top-actions { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.icon-btn { width: 40px; height: 40px; display: grid; place-items: center; border: 1px solid var(--border); border-radius: 10px; background: var(--surface); color: var(--muted); }
.icon-btn:hover { color: var(--fg); border-color: var(--fg); }
.btn { border: 1px solid transparent; border-radius: 10px; padding: 10px 16px; display: inline-flex; align-items: center; justify-content: center; gap: 8px; font-weight: 650; transition: color 160ms, background-color 160ms, border-color 160ms, filter 160ms, transform 160ms; cursor: pointer; }
.btn-primary { background: var(--accent); color: var(--surface); }
.btn-primary:hover { filter: saturate(1.15) brightness(.94); transform: translateY(-1px); }
.btn:active { transform: translateY(1px); }
.btn:disabled, .btn[aria-disabled="true"] { opacity: .5; cursor: not-allowed; transform: none; }
.btn-secondary { background: var(--surface); border-color: var(--border); color: var(--fg); }
.btn-secondary:hover { border-color: var(--fg); }
.btn-quiet { background: transparent; color: var(--muted); padding-inline: 8px; }
.btn-quiet:hover { color: var(--accent); }
.btn:focus-visible, .input:focus-visible, select:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.page { padding: 48px 0 90px; }
.eyebrow { color: var(--accent); font: 11px/1.2 var(--font-mono); letter-spacing: .09em; text-transform: uppercase; }
.muted { color: var(--muted); }
.lead { color: var(--muted); font-size: 18px; max-width: 58ch; }
.stack { display: grid; gap: 20px; }
.row { display: flex; align-items: center; gap: 12px; }
.between { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.surface { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r); }
.hero { padding: 66px 0 34px; }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; align-items: center; gap: 60px; }
.hero h1 { max-width: 9ch; margin: 16px 0 20px; }
.hero-copy { display: grid; gap: 24px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.section { padding: 60px 0; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.card { padding: 22px; }
.card:hover { border-color: color-mix(in oklch, var(--accent) 45%, var(--border)); }
.card h3 { margin: 12px 0 8px; }
.card p { color: var(--muted); }
.glyph { width: 38px; height: 38px; display: grid; place-items: center; border: 1px solid var(--border); border-radius: 10px; color: var(--accent); font: 15px var(--font-mono); }
.skill-card { min-height: 188px; display: flex; flex-direction: column; cursor: pointer; }
.skill-card .card-foot { margin-top: auto; padding-top: 20px; display: flex; justify-content: space-between; color: var(--muted); font: 12px var(--font-mono); }
.pill { display: inline-flex; align-items: center; border-radius: 999px; padding: 4px 9px; background: var(--accent-soft); color: var(--accent); font: 11px var(--font-mono); }
.tag { border: 1px solid var(--border); border-radius: 999px; padding: 4px 9px; color: var(--muted); font-size: 12px; }
.searchbar { display: flex; gap: 10px; max-width: 690px; }
.input, .textarea, select { width: 100%; border: 1px solid var(--border); border-radius: 10px; background: var(--surface); color: var(--fg); padding: 12px 14px; outline: none; }
.input:focus, .textarea:focus, select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.filters { display: flex; flex-wrap: wrap; gap: 8px; }
.filter { border: 1px solid var(--border); border-radius: 999px; background: var(--surface); padding: 7px 12px; color: var(--muted); cursor: pointer; }
.filter.active, .filter:hover { color: var(--fg); border-color: var(--accent); }
.list { display: grid; gap: 0; }
.list-row { display: grid; grid-template-columns: 48px 1fr auto; gap: 16px; align-items: center; padding: 18px 0; border-top: 1px solid var(--border); }
.rank { font: 20px var(--font-display); color: var(--muted); }
.avatar { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 50%; background: color-mix(in oklch, var(--fg) 8%, transparent); color: var(--fg); font-weight: 700; overflow: hidden; }
.avatar img { width: 100%; height: 100%; object-fit: cover; }
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { padding: 14px 12px; border-bottom: 1px solid var(--border); text-align: left; }
.table th { color: var(--muted); font: 11px var(--font-mono); text-transform: uppercase; letter-spacing: .05em; }
.num { font: 12px var(--font-mono); font-variant-numeric: tabular-nums; }
.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.field { display: grid; gap: 7px; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: 13px; color: var(--muted); }
.textarea { min-height: 150px; resize: vertical; }
.toast { position: fixed; right: 22px; bottom: 22px; z-index: 30; background: var(--fg); color: var(--surface); border-radius: 10px; padding: 12px 16px; box-shadow: var(--shadow); opacity: 0; transform: translateY(6px); pointer-events: none; transition: opacity 160ms, transform 180ms; }
.toast.show { opacity: 1; transform: none; }
.toast-action { margin-left: 12px; padding: 2px 0; border: 0; border-bottom: 1px solid currentColor; background: transparent; color: inherit; font-weight: 650; cursor: pointer; }
.footer { padding: 28px 0; border-top: 1px solid var(--border); color: var(--muted); font-size: 13px; }
.mobile-only { display: none; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.text-link { min-height: 44px; display: inline-flex; align-items: center; gap: 8px; color: var(--muted); font-weight: 650; }
.text-link:hover { color: var(--accent); }
.home-hero { padding: 58px 0 38px; border-bottom: 1px solid var(--border); }
.home-hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(360px, .78fr); gap: clamp(42px, 7vw, 88px); align-items: center; }
.home-hero-copy { display: grid; gap: 20px; }
.home-hero h1 { max-width: 11ch; font-size: clamp(44px, 5.2vw, 68px); }
.home-hero .lead { max-width: 42ch; }
.home-search { display: grid; grid-template-columns: 1fr auto; gap: 8px; max-width: 640px; margin-top: 6px; }
.home-search .input { min-height: 48px; }
.home-search .btn { min-width: 92px; }
.home-search-hint { display: flex; flex-wrap: wrap; gap: 8px 14px; color: var(--muted); font-size: 13px; }
.home-search-hint a { color: var(--fg); text-decoration: underline; text-underline-offset: 4px; cursor: pointer; }
.home-hero-figure { margin: 0; border: 1px solid var(--border); background: var(--surface); }
.home-hero-figure img { display: block; width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.home-hero-figure figcaption { display: flex; justify-content: space-between; padding: 10px 12px; border-top: 1px solid var(--border); color: var(--muted); font: 11px var(--font-mono); }

/* Recommendation tabs */
.rec-tabs { display: flex; gap: 0; border-bottom: 1px solid var(--fg); margin-bottom: 24px; }
.rec-tab { min-height: 48px; border: 0; border-bottom: 2px solid transparent; padding: 10px 20px; background: transparent; color: var(--muted); font-weight: 600; font-size: 15px; cursor: pointer; transition: color 160ms, border-color 160ms; }
.rec-tab:hover { color: var(--fg); }
.rec-tab.active { border-bottom-color: var(--fg); color: var(--fg); }

/* Home featured feed */
.home-feed { display: grid; grid-template-columns: 1.05fr .95fr; border-top: 1px solid var(--fg); border-bottom: 1px solid var(--border); }
.home-featured-lead { display: grid; grid-template-columns: 120px 1fr; gap: 22px; align-items: start; padding: 28px 30px 28px 0; border-right: 1px solid var(--border); cursor: pointer; }
.home-featured-lead img { border: 1px solid var(--border); border-radius: 8px; width: 120px; height: 120px; object-fit: cover; }
.home-featured-lead h3 { margin: 8px 0; font: 30px/1.1 var(--font-display); letter-spacing: -.01em; }
.home-featured-lead p { color: var(--muted); max-width: 48ch; }
.home-featured-lead .home-meta { display: block; margin-top: 24px; }
.home-featured-list { padding-left: 30px; }
.home-featured-row { min-height: 50%; display: grid; grid-template-columns: 52px 1fr auto; gap: 16px; align-items: center; padding: 20px 0; border-bottom: 1px solid var(--border); cursor: pointer; }
.home-featured-row:last-child { border-bottom: 0; }
.home-featured-row img { width: 52px; height: 52px; border: 1px solid var(--border); border-radius: 8px; object-fit: cover; }
.home-featured-row h3 { margin: 4px 0; }
.home-label { color: var(--accent); font: 11px var(--font-mono); letter-spacing: .02em; }
.home-meta { color: var(--muted); font: 11px var(--font-mono); white-space: nowrap; }
.home-featured-lead:hover h3, .home-featured-row:hover h3 { color: var(--accent); }

/* Scene index */
.home-scene-index { border-top: 1px solid var(--fg); }
.home-scene-index a { min-height: 74px; display: grid; grid-template-columns: 48px 180px 1fr auto; gap: 18px; align-items: center; border-bottom: 1px solid var(--border); padding: 0 4px; cursor: pointer; }
.home-scene-index a > span:nth-child(3) { color: var(--muted); }
.home-scene-index a:hover strong, .home-scene-index a:hover > span:last-child { color: var(--accent); }

/* Home publish CTA */
.home-publish { border-top: 1px solid var(--border); background: var(--surface); }
.home-publish-inner { display: grid; grid-template-columns: 1fr auto; gap: 42px; align-items: end; }
.home-publish h2 { max-width: 18ch; margin: 10px 0 12px; font-size: clamp(30px, 4vw, 46px); }
.home-publish p:last-child { color: var(--muted); }
.home-publish .btn { min-height: 48px; }

/* Skill card with cover */
.skill-card { position: relative; padding-top: 84px; overflow: hidden; }
.skill-card::before {
  content: '';
  position: absolute; top: 20px; left: 22px;
  width: 48px; height: 48px;
  border: 1px solid var(--border); border-radius: 11px;
  background: var(--surface) url('assets/skill-cover-writing.svg') center / cover no-repeat;
}
.skill-card:nth-child(3n + 2)::before { background-image: url('assets/skill-cover-review.svg'); }
.skill-card:nth-child(3n)::before { background-image: url('assets/skill-cover-research.svg'); }
.skill-card .pill { position: absolute; top: 32px; left: 82px; }

/* Detail page */
.skill-detail-hero { display: grid; grid-template-columns: 1.05fr .95fr; align-items: center; gap: 60px; }
.skill-detail-hero h1 { max-width: 12ch; margin: 12px 0 0; }

/* TRACE radar */
.trace-section { display: grid; grid-template-columns: 200px 1fr; gap: 30px; align-items: center; }
.trace-radar { width: 200px; height: 200px; }
.trace-scores { display: grid; gap: 8px; }
.trace-score-row { display: flex; align-items: center; gap: 10px; }
.trace-score-label { font: 11px var(--font-mono); color: var(--muted); width: 24px; }
.trace-score-bar { flex: 1; height: 6px; border-radius: 3px; background: var(--border); overflow: hidden; }
.trace-score-fill { height: 100%; border-radius: 3px; background: var(--accent); transition: width 400ms; }
.trace-score-value { font: 12px var(--font-mono); color: var(--fg); width: 30px; text-align: right; }
.trace-overall { font: 36px var(--font-display); color: var(--fg); }

/* Review report */
.report-block { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r); padding: 20px; }
.report-pre { white-space: pre-wrap; font: 12px/1.6 var(--font-mono); color: var(--fg); }
.risk-badge { display: inline-flex; align-items: center; gap: 6px; padding: 4px 10px; border-radius: 999px; font: 11px var(--font-mono); font-weight: 600; }
.risk-low { background: color-mix(in oklch, var(--green) 12%, transparent); color: var(--green); }
.risk-medium { background: color-mix(in oklch, var(--amber) 14%, transparent); color: oklch(45% .11 82); }
.risk-high { background: color-mix(in oklch, var(--danger) 12%, transparent); color: var(--danger); }

/* Auth */
.login-prompt { display: grid; place-items: center; gap: 16px; padding: 60px 20px; text-align: center; }

/* Prompt box */
.prompt-box { position: relative; background: var(--surface); border: 1px solid var(--border); border-radius: var(--r); }
.prompt-box pre { padding: 20px; padding-right: 50px; white-space: pre-wrap; word-break: break-word; font: 13px/1.6 var(--font-mono); color: var(--fg); margin: 0; max-height: 400px; overflow-y: auto; }
.prompt-box .copy-btn { position: absolute; top: 12px; right: 12px; }

/* State helpers */
.loading-state { display: grid; place-items: center; gap: 10px; padding: 60px 20px; color: var(--muted); text-align: center; }
.error-state { display: grid; place-items: center; gap: 10px; padding: 60px 20px; color: var(--danger); text-align: center; }
.empty-state { display: grid; gap: 8px; padding: 40px 20px; text-align: center; color: var(--muted); }
.empty-state strong { color: var(--fg); }
.skeleton { width: min(420px, 80%); height: 12px; background: color-mix(in oklch, var(--fg) 9%, transparent); border-radius: 6px; }

/* Motion */
html.motion-enabled [data-motion-reveal] { opacity: 0; transform: translateY(8px); transition: opacity 220ms cubic-bezier(.22,1,.36,1), transform 240ms cubic-bezier(.22,1,.36,1); }
html.motion-enabled [data-motion-reveal].is-motion-visible { opacity: 1; transform: none; }

/* Responsive */
@media (max-width: 920px) {
  .mainnav { display: none; }
  .mobile-only { display: grid; }
  .hero-grid, .home-hero-grid { grid-template-columns: 1fr; gap: 32px; }
  .home-feed { grid-template-columns: 1fr; }
  .home-featured-lead { border-right: 0; border-bottom: 1px solid var(--border); padding-right: 0; }
  .home-featured-list { padding-left: 0; }
  .home-scene-index a { grid-template-columns: 40px 150px 1fr auto; }
  .grid-3, .grid-4, .form-grid { grid-template-columns: 1fr; }
  .skill-detail-hero { grid-template-columns: 1fr; }
  .trace-section { grid-template-columns: 1fr; }
  .section-head { align-items: start; flex-direction: column; }
}
@media (max-width: 560px) {
  .topbar-inner { gap: 12px; }
  .top-actions .btn-secondary { display: none; }
  .home-search { grid-template-columns: 1fr; }
  .home-search .btn { width: 100%; }
  .home-featured-lead { grid-template-columns: 72px 1fr; gap: 15px; }
  .home-featured-lead img { width: 72px; height: 72px; }
  .home-featured-lead h3 { font-size: 24px; }
  .home-featured-row { grid-template-columns: 44px 1fr; gap: 12px; }
  .home-featured-row img { width: 44px; height: 44px; }
  .home-featured-row > .home-meta { grid-column: 2; }
  .home-publish-inner { grid-template-columns: 1fr; }
  .home-publish .btn { width: 100%; }
  .searchbar { flex-direction: column; }
  .searchbar .btn { width: 100%; }
  .list-row { grid-template-columns: 32px 1fr; }
  .list-row > .btn, .list-row > .num { grid-column: 2; justify-self: start; }
  .skill-card { padding-top: 76px; }
  .skill-card::before { width: 40px; height: 40px; top: 18px; left: 18px; border-radius: 9px; }
  .skill-card .pill { top: 27px; left: 70px; }
}