:root{--bg:#fff;--fg:#1a1f24;--muted:#5b6670;--line:#d9dee3;--accent:#0b5cad}@media (prefers-color-scheme:dark){:root{--bg:#14181c;--fg:#e6eaee;--muted:#9aa5b0;--line:#2c343c;--accent:#7ab8f5}}*{box-sizing:border-box}body{background:var(--bg);color:var(--fg);margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5}a{color:var(--accent)}.site-header,main{max-width:44rem;margin:0 auto;padding:1rem}.site-header{border-bottom:1px solid var(--line);font-weight:600}.site-header a{color:inherit;text-decoration:none}h1{line-height:1.2}.note{color:var(--muted)}.figure-list{padding-left:1.2rem}