:root{--ink:#20262d;--muted:#66717d;--line:#d8dde2;--paper:#f5f6f7;--dark:#202a32;--accent:#cbd5df;--max:900px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.75 Inter,system-ui,-apple-system,"Segoe UI",sans-serif}
a{color:inherit;text-decoration:none}.container{width:min(var(--max),calc(100% - 36px));margin:auto}
header{background:rgba(30,39,47,.97);color:#fff;border-bottom:1px solid #ffffff18}
.nav{min-height:74px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;gap:11px;font-weight:850;letter-spacing:-.03em}
.mark{display:grid;place-items:center;width:42px;height:42px;border-radius:13px;background:linear-gradient(145deg,#f5f7f9,#aeb9c3);color:var(--dark);font-weight:900}
.navlinks{display:flex;gap:22px;font-size:.9rem;color:#dfe5ea}.navlinks a:hover{color:#fff}
main{padding:48px 0 80px}.back{display:inline-flex;gap:8px;color:#53616d;font-weight:750;font-size:.9rem;margin-bottom:28px}
.eyebrow{text-transform:uppercase;letter-spacing:.15em;font-size:.75rem;font-weight:800;color:#6a7782;margin-bottom:12px}
h1{font-size:clamp(2.5rem,7vw,4.5rem);line-height:1.08;letter-spacing:-.05em;margin:0 0 20px}
h2{font-size:1.65rem;line-height:1.2;letter-spacing:-.03em;margin:36px 0 12px}
h3{font-size:1.15rem;line-height:1.3}
.lede{font-size:1.2rem;color:#56636f;line-height:1.6}
.meta{display:flex;gap:14px;flex-wrap:wrap;color:#78838d;font-size:.86rem;margin:22px 0 30px}
.article-hero{padding:32px;border:1px solid var(--line);border-radius:22px;background:linear-gradient(135deg,#e7ebee,#c5cdd4);margin:24px 0 38px;min-height:180px;display:flex;align-items:center;gap:24px}
.article-hero .symbol{display:grid;place-items:center;width:84px;height:84px;border-radius:22px;background:#ffffffb8;font-size:2rem;flex-shrink:0}
.article-content{max-width:760px}.article-content p,.article-content li{color:#4c5964}
.article-content code{background:#e8ecef;padding:2px 6px;border-radius:5px;font-size:.92em}
pre{overflow:auto;background:#202a32;color:#e6edf2;padding:22px;border-radius:14px;line-height:1.6;font-size:.9rem}
.callout{border-left:4px solid #8999a6;background:#e8ecef;padding:18px 20px;border-radius:0 12px 12px 0;margin:24px 0}
.cta{margin-top:48px;background:var(--dark);color:white;border-radius:20px;padding:28px}
.cta p{color:#d4dce2}.button{display:inline-block;padding:11px 18px;border-radius:99px;background:var(--accent);color:var(--ink);font-weight:800}
footer{background:var(--dark);color:#d3dbe1;padding:26px 0;font-size:.84rem}
@media(max-width:600px){.nav{align-items:flex-start;flex-direction:column;padding:15px 0}.navlinks{gap:14px;flex-wrap:wrap}.article-hero{padding:22px;align-items:flex-start;flex-direction:column}.meta{gap:8px}}