:root{--bg:#F2F5FB;--surface:#fff;--ink:#132042;--muted:#56647F;--line:#D3DBEC;--accent:#2B59E8}
@media (prefers-color-scheme:dark){:root{--bg:#0E1528;--surface:#172039;--ink:#EAF0FF;--muted:#9AA7C7;--line:#2A3658;--accent:#7B9CFF}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:400 17px/1.65 Figtree,system-ui,-apple-system,"Segoe UI",sans-serif}
header{border-bottom:1px solid var(--line)}
header div,main,footer div{max-width:760px;margin:0 auto;padding:0 22px}
header div{height:64px;display:flex;align-items:center;justify-content:space-between}
.brand{font:800 1.3rem "Bricolage Grotesque",sans-serif;color:var(--ink);text-decoration:none;letter-spacing:-.02em}
.brand b{color:var(--accent);font-weight:800}
header a.back{color:var(--muted);text-decoration:none;font-weight:600}
h1,h2{font-family:"Bricolage Grotesque",Figtree,sans-serif;letter-spacing:-.02em;line-height:1.1}
h1{font-size:2.4rem;margin:40px 0 6px}
h2{font-size:1.4rem;margin:34px 0 8px}
.date{color:var(--muted);margin:0 0 24px}
p,li{margin:0 0 12px}
ul{padding-left:1.3em}
a{color:var(--accent)}
.box{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:16px 20px;margin:20px 0}
footer{border-top:1px solid var(--line);margin-top:48px;padding:24px 0 40px;color:var(--muted);font-size:.92rem}
footer a{color:var(--muted);margin-right:16px}