:root{--bg:#fff;--ink:#17212b;--muted:#5b6875;--line:#dde3e9;--accent:#0a6c74;color-scheme:light}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:400 17px/1.65 "IBM Plex Sans",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;-webkit-font-smoothing:antialiased}
header,main,footer{max-width:880px;margin:0 auto;padding-left:24px;padding-right:24px}
header{display:flex;flex-wrap:wrap;align-items:center;gap:12px 28px;padding-top:24px;padding-bottom:24px}
.brand{font-weight:600;color:var(--ink);text-decoration:none;margin-right:auto}
nav{display:flex;flex-wrap:wrap;gap:4px 22px}
nav a{color:var(--muted);text-decoration:none;padding:4px 0;border-bottom:2px solid transparent}
nav a:hover{color:var(--ink)}
nav a[aria-current]{color:var(--ink);border-color:var(--accent)}
#lang{font:inherit;font-size:14px;font-weight:500;color:var(--accent);background:none;border:1px solid var(--line);border-radius:6px;padding:4px 10px;cursor:pointer}
#lang:hover{border-color:var(--accent)}
a{color:var(--accent)}
a:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
main{padding-top:40px;padding-bottom:72px}
h1{font-size:clamp(30px,5.5vw,46px);line-height:1.15;font-weight:600;letter-spacing:-.02em;margin:0 0 20px;max-width:18em}
h2{font-size:22px;font-weight:600;margin:52px 0 12px;letter-spacing:-.01em}
h3{font-size:18px;font-weight:600;margin:0 0 6px}
p{margin:0 0 16px;max-width:62ch}
.lead{font-size:20px;color:var(--muted);max-width:56ch}
.trace{width:100%;height:auto;margin:32px 0 28px;display:block}
.trace .sp{stroke:var(--line);stroke-width:1.5;stroke-dasharray:4 6}
.trace .line{fill:none;stroke:var(--accent);stroke-width:2.5;stroke-linecap:round;stroke-dasharray:1;stroke-dashoffset:1;animation:draw 2.4s ease-out .2s forwards}
@keyframes draw{to{stroke-dashoffset:0}}
.cta a{display:inline-block;margin:0 12px 12px 0;padding:10px 20px;border:1px solid var(--accent);border-radius:6px;text-decoration:none;font-weight:500}
.cta a.primary{background:var(--accent);color:#fff}
.row{padding:22px 0;border-top:1px solid var(--line)}
.row:last-of-type{border-bottom:1px solid var(--line)}
.row p{margin-bottom:8px}
.tags{color:var(--muted);font-size:15px}
dl{margin:0}
dl div{display:grid;grid-template-columns:200px 1fr;gap:4px 24px;padding:18px 0;border-top:1px solid var(--line)}
dt{font-weight:600}
dd{margin:0}
.todo{background:#fff4cc;padding:0 4px;border-radius:3px}
footer{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;padding-top:24px;padding-bottom:40px;border-top:1px solid var(--line);color:var(--muted);font-size:14px}
@media(max-width:600px){dl div{grid-template-columns:1fr}body{font-size:16px}.lead{font-size:18px}}
@media(prefers-reduced-motion:reduce){.trace .line{animation:none;stroke-dashoffset:0}}