:root{--ink: #1c1b22;--muted: #5f5e6a;--line: #e7e5ee;--surface: #f6f5fa;--accent: #2b6cff;color-scheme:light;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:#fff}*{box-sizing:border-box}body{margin:0}a{color:var(--accent)}code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.92em}.nav{position:sticky;top:0;z-index:10;display:flex;justify-content:space-between;align-items:center;padding:12px 24px;background:#ffffffeb;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}.nav a{color:var(--ink);text-decoration:none;margin-left:18px;font-size:14px}.nav .brand{display:flex;gap:10px;align-items:center;margin:0;font-weight:700;font-size:16px}main{max-width:1040px;margin:0 auto;padding:0 24px 64px}section{padding-top:56px}h1{font-size:clamp(40px,7vw,64px);letter-spacing:-1.5px;margin:24px 0 12px}h2{font-size:28px;letter-spacing:-.4px;margin:0 0 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center;transform:scaleY(.04)}@media(max-width:720px){.playground{grid-template-columns:1fr}.nav div a:not(:last-child){display:none}}