:root { --bg:#ffffff; --fg:#0f172a; --muted:#475569; --line:#e2e8f0; --accent:#0369a1; --card:#f8fafc; --code:#0f172a; --codefg:#e2e8f0; }
@media (prefers-color-scheme: dark) { :root { --bg:#0b1120; --fg:#e2e8f0; --muted:#94a3b8; --line:#1e293b; --accent:#38bdf8; --card:#111827; --code:#020617; } }
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; }
a { color: var(--accent); }
.wrap { max-width: 960px; margin: 0 auto; padding: 0 20px; }
.top { border-bottom: 1px solid var(--line); }
.nav { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 64px; flex-wrap: wrap; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; font-size: 20px; color: var(--fg); text-decoration: none; }
nav a { margin-left: 18px; color: var(--fg); text-decoration: none; }
nav a:hover { color: var(--accent); }
main { padding: 40px 20px 56px; }
h1 { font-size: clamp(30px, 5vw, 46px); line-height: 1.15; margin: 8px 0 16px; }
h2 { font-size: 26px; margin: 48px 0 12px; }
h3 { font-size: 19px; margin: 0 0 6px; }
.lead { font-size: 20px; color: var(--muted); max-width: 720px; }
.notice { border: 1px solid var(--accent); border-radius: 10px; padding: 14px 18px; margin: 24px 0; background: var(--card); }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.card { border: 1px solid var(--line); border-radius: 10px; padding: 18px; background: var(--card); }
.card p { margin: 0 0 8px; color: var(--muted); }
.cta { display: flex; gap: 12px; flex-wrap: wrap; margin: 24px 0; }
.btn { display: inline-block; padding: 10px 18px; border-radius: 8px; border: 1px solid var(--accent); text-decoration: none; font-weight: 600; }
.btn.primary { background: var(--accent); color: var(--bg); }
pre { background: var(--code); color: var(--codefg); padding: 16px; border-radius: 10px; overflow-x: auto; font-size: 14px; line-height: 1.5; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .92em; }
:not(pre) > code { background: var(--card); border: 1px solid var(--line); border-radius: 4px; padding: 0 4px; }
ul.points { padding-left: 20px; } ul.points li { margin: 6px 0; }
.foot { border-top: 1px solid var(--line); padding: 24px 0; color: var(--muted); font-size: 15px; }
.foot .beta { font-weight: 600; color: var(--fg); }
article.prose { max-width: 760px; }