:root{--bg:#0f0f1a;--card:#17172a;--border:#2a2a45;--text:#ffffff;--muted:#a9a9c8;--accent:#a78bfa}
*{box-sizing:border-box;margin:0;padding:0}
body{background:var(--bg);color:var(--text);font-family:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:var(--accent)}
a:hover{color:#fff}
a:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:3px}
.skip{position:absolute;left:-999px;top:8px;background:var(--accent);color:#0f0f1a;padding:8px 14px;border-radius:8px;z-index:30}
.skip:focus{left:8px}
header{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 24px;background:rgba(15,15,26,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
.logo{font-weight:800;font-size:18px;letter-spacing:-.02em;color:var(--text);text-decoration:none}
.logo b{color:var(--accent)}
.back{font-size:14px;font-weight:600;text-decoration:none;border:1px solid var(--border);background:var(--card);color:var(--text);padding:8px 14px;border-radius:10px;white-space:nowrap}
.back:hover{border-color:var(--accent)}
main{max-width:48rem;margin:0 auto;padding:1.5rem}
h1{font-size:clamp(26px,5vw,36px);line-height:1.2;letter-spacing:-.02em;margin:16px 0 6px}
.meta{color:var(--muted);font-size:14px;margin-bottom:24px}
h2{font-size:20px;line-height:1.35;margin:30px 0 10px;scroll-margin-top:80px}
h3{font-size:16px;margin:16px 0 6px}
p,ul{margin-bottom:12px;color:#e4e4f2}
ul{padding-left:22px}
li{margin-bottom:6px}
strong{color:var(--text)}
.box{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:16px 18px;margin:14px 0}
.box p:last-child,.box ul:last-child{margin-bottom:0}
.toc ol{padding-left:22px;columns:2;column-gap:28px;color:#e4e4f2}
@media (max-width:600px){.toc ol{columns:1}header{padding:12px 16px}}
code{font-size:.9em;background:rgba(167,139,250,.15);padding:1px 5px;border-radius:5px}
footer{border-top:1px solid var(--border);padding:22px 24px;text-align:center;font-size:13px;color:var(--muted)}
footer a{color:var(--muted)}
footer a:hover{color:var(--text)}
footer .sep{opacity:.5;margin:0 6px}