:root{color-scheme:light;--canvas:#fff;--surface:#fafafa;--line:#e4e4e7;--fg:#18181b;--muted:#71717a;--accent:#ea580c;--on-accent:#fff;--font:ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;--mono:ui-monospace,"SF Mono",Menlo,monospace}
*{box-sizing:border-box}body{margin:0;background:var(--canvas);color:var(--fg);font-family:var(--font);line-height:1.68;-webkit-font-smoothing:antialiased}a{color:var(--accent)}nav{border-bottom:1px solid var(--line);background:var(--surface)}.nav-in,.page{max-width:860px;margin:auto;padding:0 24px}.nav-in{height:60px;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:9px;color:var(--fg);text-decoration:none;font-family:var(--mono);font-size:14px;font-weight:700}.mark{width:24px;height:24px;border-radius:7px;background:var(--accent);color:var(--on-accent);display:grid;place-items:center}.mark svg{width:14px}.back{font-size:14px;color:var(--muted);text-decoration:none}.page{padding-top:72px;padding-bottom:96px}h1{font-size:clamp(36px,6vw,54px);line-height:1.05;letter-spacing:-.04em;margin:0 0 12px}.lede{font-size:18px;color:var(--muted);margin:0 0 50px}.effective{font-family:var(--mono);font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:var(--accent);margin-bottom:16px}h2{font-size:22px;margin:38px 0 10px;letter-spacing:-.02em}p,li{color:#3f3f46}li+li{margin-top:8px}.card{margin-top:28px;padding:22px;border:1px solid var(--line);border-radius:14px;background:var(--surface)}footer{border-top:1px solid var(--line);padding:28px 0;color:var(--muted);font-size:13px}.foot{max-width:860px;margin:auto;padding:0 24px;display:flex;gap:18px;flex-wrap:wrap}.foot a{color:inherit}
@media(prefers-color-scheme:dark){:root{color-scheme:dark;--canvas:#08090c;--surface:#0d0f14;--line:#212633;--fg:#f4f4f5;--muted:#8b93a5;--accent:#22c58b;--on-accent:#08090c}p,li{color:#d4d4d8}}