:root{--bg:#fff;--fg:#1d1d1f;--muted:#5f6368;--accent:#ff7a00;--line:#e8e8ea}
@media (prefers-color-scheme:dark){:root{--bg:#121212;--fg:#ececec;--muted:#a0a0a0;--line:#2a2a2a}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif}
main{max-width:760px;margin:0 auto;padding:32px 16px 64px}header a{color:var(--accent);font-weight:700;text-decoration:none;font-size:20px}
h1{font-size:28px;line-height:1.25;margin:24px 0 8px}h2{font-size:20px;margin:28px 0 8px}p,li{color:var(--fg)}.muted{color:var(--muted);font-size:14px}
a{color:var(--accent)}ul,ol{padding-left:22px}footer{margin-top:48px;border-top:1px solid var(--line);padding-top:16px;font-size:14px;color:var(--muted)}
.todo{background:#fff3cd;color:#7a5b00;padding:2px 6px;border-radius:4px}