:root{--c-bg:#fafaf9;--c-paper:#fff;--c-card:#fff;--c-ink:#1c1917;--c-ink-mid:#44403c;--c-ink-soft:#78716c;--c-line:#e7e5e4;--c-line-soft:#f5f5f4;--c-surrogate:#0ea5e9;--c-mini:#f97316;--c-teacher:#dc2626;--c-defer:#7f1d1d;--c-noise:#d6d3d1;--c-good:#15803d;--c-warn:#b91c1c;--c-accent:#facc15;--font-sans:-apple-system,BlinkMacSystemFont,"SF Pro Text","Helvetica Neue","Inter",system-ui,Arial,sans-serif;--font-mono:ui-monospace,"SF Mono","JetBrains Mono",Menlo,monospace;--r-sm:4px;--r-md:8px;--r-lg:12px;--shadow-soft:0 1px 2px rgba(0,0,0,.04)}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--c-bg);color:var(--c-ink)}body{font-family:var(--font-sans);-webkit-font-smoothing:antialiased;font-feature-settings:"ss01","cv01","cv11";line-height:1.5;font-size:15px}a{color:var(--c-ink);text-decoration:underline;-webkit-text-decoration-color:var(--c-line);text-decoration-color:var(--c-line)}a:hover{-webkit-text-decoration-color:var(--c-teacher);text-decoration-color:var(--c-teacher)}.eyebrow,.mono,code,pre{font-family:var(--font-mono)}.eyebrow{font-size:11px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--c-ink-soft)}.hairline{border:0;height:1px;background:var(--c-line);margin:0}.surface{background:var(--c-paper);border:1px solid var(--c-line);border-radius:var(--r-md)}.page-shell{min-height:100vh;display:flex;flex-direction:column}.page-main{flex:1 1;width:100%;max-width:1200px;margin:0 auto;padding:32px 28px 80px;box-sizing:border-box}.auth-stage{flex:1 1;display:flex;align-items:center;justify-content:center;padding:40px 20px}.auth-card{width:100%;max-width:420px}.auth-card h1{margin:16px 0 6px;font-size:26px;letter-spacing:-.02em}.auth-card p.muted{margin:0 0 24px;color:var(--c-ink-mid);font-size:14px}.field-stack{display:flex;flex-direction:column;gap:14px;margin-bottom:18px}.row{display:flex;align-items:center;justify-content:space-between;gap:12px}.error-box{background:#fef2f2;border:1px solid #fca5a5;border-radius:var(--r-sm);padding:8px 12px;color:#7f1d1d;font-size:13px;margin-bottom:12px}.empty-state{text-align:center;padding:56px 24px;border:1px dashed var(--c-line);border-radius:var(--r-md);background:var(--c-paper);color:var(--c-ink-mid)}.empty-state h3{margin:0 0 6px;color:var(--c-ink);font-size:17px}.empty-state p{margin:0 0 14px}table.trc-table{width:100%;border-collapse:collapse;font-size:14px}table.trc-table td,table.trc-table th{padding:10px 12px;border-bottom:1px solid var(--c-line);text-align:left;vertical-align:top}table.trc-table th{font-family:var(--font-mono);font-size:11px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--c-ink-soft);border-bottom:1px solid var(--c-line)}table.trc-table th,table.trc-table tr:hover td{background:var(--c-line-soft)}.muted{color:var(--c-ink-soft)}.mono{font-family:var(--font-mono);font-size:13px}.auth-divider{display:flex;align-items:center;gap:10px;margin:16px 0}.auth-divider>span:first-child,.auth-divider>span:last-child{flex:1 1;height:1px;background:var(--c-line)}.auth-divider-label{font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--c-ink-soft)}.home-hero{display:flex;align-items:flex-start;justify-content:space-between;gap:24px;padding:28px 0 24px;border-bottom:1px dashed var(--c-line);margin-bottom:4px}.home-hero-text{flex:1 1 auto;min-width:0}.home-hero-aside{flex:0 0 auto}.home-hero-title{font-size:clamp(28px,3.4vw,38px);font-weight:700;letter-spacing:-.02em;margin:6px 0 8px;line-height:1.12;color:var(--c-ink)}.home-hero-sub{font-size:15px;color:var(--c-ink-mid);line-height:1.55;max-width:64ch;margin:0 0 18px}.home-hero-actions{display:flex;gap:10px;flex-wrap:wrap}.home-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));grid-gap:12px;gap:12px;margin-top:12px}.home-tracer-card{display:flex;flex-direction:column;gap:8px;padding:14px 16px;border:1px solid var(--c-line);border-radius:var(--r-md,10px);background:var(--c-paper);text-decoration:none;color:inherit;transition:border-color .12s,box-shadow .12s,transform .12s;min-height:110px}.home-tracer-card:hover{border-color:var(--c-ink-mid);box-shadow:0 4px 12px rgba(0,0,0,.06);transform:translateY(-1px)}.home-tracer-head{display:flex;align-items:center;justify-content:space-between;gap:8px}.home-tracer-name{font-weight:600;font-size:14.5px;letter-spacing:-.01em;color:var(--c-ink);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.home-tracer-meta{display:flex;gap:10px;font-size:11.5px;align-items:center}.home-tracer-meta .mono{font-family:var(--font-mono);color:var(--c-ink-mid)}.home-tracer-desc{font-size:12.5px;line-height:1.45;margin-top:auto}.home-tracer-card-new{align-items:center;justify-content:center;border-style:dashed;color:var(--c-ink-soft);text-align:center;gap:4px}.home-tracer-card-new:hover{color:var(--c-ink)}.home-tracer-plus{font-size:28px;line-height:1;font-weight:300;color:var(--c-ink-soft)}.home-tracer-card-new:hover .home-tracer-plus{color:var(--c-ink)}@media (max-width:720px){.home-hero{flex-direction:column}.home-hero-aside{width:100%}}@keyframes trc-spin{0%{transform:rotate(0deg)}to{transform:rotate(1turn)}}.trc-route-loader{position:fixed;top:0;left:0;right:0;height:2px;z-index:100;pointer-events:none;opacity:0;transition:opacity .2s}.trc-route-loader[data-active=true]{opacity:1}.trc-route-loader-bar{height:100%;width:30%;background:linear-gradient(90deg,transparent,var(--c-surrogate),var(--c-mini),var(--c-teacher),transparent);animation:trc-route-loader-slide 1s ease-in-out infinite}@keyframes trc-route-loader-slide{0%{transform:translateX(-100%)}to{transform:translateX(400%)}}