:root{--bg:#0a0a10;--card:#14141d;--line:rgba(255,255,255,.09);--text:#f4f4f7;--muted:#b3b3c3;--lime:#c6ff3d;--violet:#a18bff}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:80px}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.7 "Inter",system-ui,sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--violet)}
:focus-visible{outline:2px solid var(--lime);outline-offset:3px;border-radius:6px}
header{position:sticky;top:0;background:rgba(10,10,16,.8);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--line);z-index:5}
header .wrap{display:flex;justify-content:space-between;align-items:center;height:64px}
.logo{font-weight:900;font-size:1.4rem;letter-spacing:-.04em;text-decoration:none;color:var(--text)}
.logo b{color:var(--lime)}
.wrap{max-width:820px;margin:0 auto;padding:0 20px}
nav.toc{display:flex;flex-wrap:wrap;gap:8px;margin:32px 0}
nav.toc a{color:var(--text);text-decoration:none;border:1px solid var(--line);border-radius:10px;padding:10px 14px;min-height:44px;display:inline-flex;align-items:center}
nav.toc a:hover{border-color:rgba(255,255,255,.25)}
h1{font-size:clamp(2rem,5vw,2.8rem);letter-spacing:-.035em;line-height:1.1;margin:48px 0 8px}
h2{font-size:1.6rem;letter-spacing:-.02em;margin:56px 0 12px;padding-top:12px;border-top:1px solid var(--line)}
h3{font-size:1.05rem;margin:28px 0 6px}
p,li{color:var(--muted)}
strong{color:var(--text)}
.box{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:18px 20px;margin:16px 0}
.back{display:inline-flex;align-items:center;min-height:44px;color:var(--text);text-decoration:none;font-weight:600}
footer{border-top:1px solid var(--line);margin-top:72px;padding:28px 0 48px;color:#76768a;font-size:.9rem}