:root{--bg:#fff;--fg:#202124;--muted:#5f6368;--accent:#1a73e8;--card:#f1f3f4}
@media (prefers-color-scheme:dark){:root{--bg:#18191b;--fg:#e8eaed;--muted:#9aa0a6;--accent:#8ab4f8;--card:#26282b}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.6 system-ui,-apple-system,"Segoe UI",sans-serif}
main,header,footer{max-width:42rem;margin:0 auto;padding:1rem}
a{color:var(--accent)}
h1{font-size:2rem;line-height:1.2}
img{max-width:100%;height:auto;border-radius:8px}
.button{display:inline-block;padding:.7rem 1.2rem;background:var(--accent);color:var(--bg);border-radius:6px;text-decoration:none;font-weight:600}
.card{background:var(--card);padding:1rem;border-radius:8px}
.muted,footer{color:var(--muted);font-size:.9rem}
li{margin:.3rem 0}