:root{color-scheme:light dark;--bg:#f4f6f8;--surface:#fff;--text:#101519;--muted:#4a5560;--border:#dce2e8;--accent:#00695c}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:17px;line-height:1.7;overflow-wrap:anywhere}
a{color:var(--accent);text-underline-offset:3px}
a:hover{text-decoration-thickness:2px}
a:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:4px;border-radius:3px}
.site-header{max-width:940px;margin:auto;padding:24px 32px;display:flex;align-items:center;justify-content:space-between;gap:20px;border-bottom:1px solid var(--border)}
.brand{font-size:23px;font-weight:750;letter-spacing:-.03em;text-decoration:none;color:var(--text)}
main{max-width:860px;margin:32px auto;padding:40px 48px;background:var(--surface);border:1px solid var(--border);border-radius:18px}
h1{font-size:clamp(27px,4vw,38px);line-height:1.25;letter-spacing:-.025em;margin:0 0 20px}
h2{font-size:23px;line-height:1.35;margin:36px 0 12px}
h3{font-size:20px;line-height:1.4}
p{margin:14px 0}
ul{padding-inline-start:24px}
li{margin:8px 0}
footer{max-width:860px;margin:24px auto 48px;display:flex;justify-content:space-between;gap:20px;padding:0 8px;color:var(--muted);font-size:14px}
.languages{position:relative;max-width:68%}
summary{cursor:pointer;color:var(--accent);font-size:15px;padding:8px 0}
.languages nav{position:absolute;right:0;top:44px;z-index:2;width:min(380px,82vw);padding:14px;background:var(--surface);border:1px solid var(--border);border-radius:12px;box-shadow:0 10px 28px #0002;display:grid;grid-template-columns:1fr 1fr;gap:6px}
.languages nav a{padding:7px;font-size:14px;border-radius:6px;text-decoration:none}
.languages nav a[aria-current]{background:var(--bg);font-weight:700}
@media(max-width:640px){.site-header{padding:18px 20px}main{margin:18px 12px;padding:26px 20px;border-radius:12px}h2{font-size:21px}footer{margin:20px 20px 32px;flex-wrap:wrap;padding:0}}
@media(prefers-color-scheme:dark){:root{--bg:#0e1418;--surface:#182128;--text:#f2f5f7;--muted:#aeb9c2;--border:#2a343c;--accent:#4fd1be}}