:root{color-scheme:light dark;--bg:#f9f9fb;--text:#22222a;--muted:#626270;--line:#e4e2ec;--primary:#5649b0}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.75 Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;overflow-wrap:anywhere}
header,main,footer{max-width:900px;margin:auto;padding:28px}
header{display:flex;align-items:center;justify-content:space-between;gap:16px;border-bottom:1px solid var(--line)}
.brand{font-size:22px;font-weight:800;text-decoration:none}header span,.date,footer{color:var(--muted);font-size:14px}
main{padding-top:44px;padding-bottom:40px}h1{font-size:36px;line-height:1.2;margin:0 0 18px;font-weight:750}h2{font-size:23px;line-height:1.35;margin:0 0 18px}h3{font-size:17px;line-height:1.5;margin:24px 0 8px}p{margin:0 0 18px}.intro{font-size:18px}a{color:var(--primary);text-underline-offset:3px}a:hover{text-decoration-thickness:2px}a:focus-visible{outline:3px solid var(--primary);outline-offset:4px}
nav{display:flex;flex-wrap:wrap;gap:12px 22px;padding:24px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin:28px 0 36px}nav a{font-size:14px;font-weight:600}section{padding:10px 0 30px}ul{padding-left:24px}li{margin-bottom:12px}footer{border-top:1px solid var(--line)}
@media(prefers-color-scheme:dark){:root{--bg:#1c1c1c;--text:#f5f5f8;--muted:#bebcc9;--line:#3e3b49;--primary:#b5aafa}}
@media(max-width:480px){header,main,footer{padding-left:20px;padding-right:20px}header{align-items:flex-start;flex-wrap:wrap}main{padding-top:30px}h1{font-size:30px}h2{font-size:21px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
@media print{body{background:white;color:black}header,nav,footer{display:none}main{max-width:none;padding:0}a{color:black}section{break-inside:avoid}}