:root{--bg:#dce7ff;--ink:#0a1736;--muted:#1b3a8f;--accent:#2d5bff;--surface:#fff;--line:#0a1736}
@media (prefers-color-scheme:dark){:root{--bg:#0a1736;--ink:#eef3ff;--muted:#b9cfff;--accent:#5c86ff;--surface:#122657;--line:#b9cfff}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 "Space Grotesk",system-ui,-apple-system,sans-serif}
header,main,footer{max-width:42rem;margin:0 auto;padding:1rem 1rem}
header{display:flex;align-items:center;gap:.6rem;padding-top:1.5rem}
.logo{display:inline-flex;width:2.25rem;height:2.25rem;align-items:center;justify-content:center;background:var(--accent);color:#fff;border:2px solid var(--line);box-shadow:3px 3px 0 var(--line);font-weight:700}
a.brand{display:flex;align-items:center;gap:.6rem;color:inherit;text-decoration:none;font-weight:700;font-size:1.25rem}
h1{font-size:clamp(2rem,6vw,3rem);line-height:1.1;margin:.5rem 0 1rem;letter-spacing:-.02em}
h2{font-size:1.25rem;margin:2rem 0 .5rem}
a{color:var(--accent)}
.card{background:var(--surface);border:2px solid var(--line);box-shadow:4px 4px 0 var(--line);padding:1.5rem;margin:1.5rem 0}
.pill{display:inline-block;background:var(--accent);color:#fff;padding:.15rem .6rem;font:600 .8rem/1.6 ui-monospace,monospace}
.mono{font-family:ui-monospace,Menlo,monospace;font-size:.8rem;color:var(--muted)}
ul{padding-left:1.25rem}
footer{display:flex;flex-wrap:wrap;gap:1rem;font-size:.9rem;border-top:2px solid var(--line);margin-top:3rem}