:root{--bg:#f6f8fa;--fg:#10222d;--muted:#4a5f6c;--line:#d9e1e7;--brand:#00354d;--accent:#00354d;--red:#d3041b;--card:#fff;color-scheme:light dark}
@media(prefers-color-scheme:dark){:root{--bg:#0b1c26;--fg:#e8eef2;--muted:#9fb2bf;--line:#1f3a4a;--accent:#e2001a;--card:#10293a}}
*{box-sizing:border-box}
html{font:17px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
body{margin:0;background:var(--bg);color:var(--fg);min-height:100vh;display:flex;flex-direction:column}
.wrap{width:min(860px,100% - 32px);margin-inline:auto}
.bar{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.top{padding:22px 0;border-bottom:1px solid var(--line)}
.brand img{display:block;height:auto;max-width:min(232px,60vw)}
.lang{font-weight:600;text-decoration:none;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:4px 12px}
.lang:hover,.lang:focus-visible{color:var(--fg);border-color:var(--fg)}
main{flex:1;padding:64px 0 48px}
.eyebrow{display:inline-block;margin:0 0 14px;font-size:13px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--red)}
h1{font-size:clamp(28px,5vw,44px);line-height:1.15;margin:0 0 20px;letter-spacing:-.01em}
.lead{font-size:19px;color:var(--muted);max-width:60ch}
.hero p{max-width:60ch}
.topics{margin-top:40px}
.topics ul{list-style:none;margin:0;padding:0;display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.topics li{background:var(--card);border:1px solid var(--line);border-left:4px solid var(--red);border-radius:10px;padding:16px 18px;font-weight:600}
.prose{max-width:68ch}
.prose h1{font-size:clamp(26px,4vw,36px)}
.prose h2{font-size:19px;margin:28px 0 6px}
.prose p,.prose li{color:var(--fg)}
.note{background:var(--card);border:1px solid var(--line);border-radius:8px;padding:10px 14px;color:var(--muted)}
a{color:var(--accent)}
a:focus-visible,button:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
.foot{border-top:1px solid var(--line);padding:22px 0;color:var(--muted);font-size:15px}
.foot p{margin:0}.foot nav{display:flex;gap:18px;flex-wrap:wrap}
.foot a{color:var(--muted)}
.linklike{font:inherit;color:var(--muted);background:none;border:0;padding:0;cursor:pointer;text-decoration:underline}
.linklike:hover,.foot a:hover{color:var(--fg)}
@media(max-width:520px){main{padding:40px 0 32px}}