:root{--bg:#05070d;--surface:#0e1320;--line:rgba(255,255,255,.08);--line-2:rgba(255,255,255,.14);--fg:#f3f6fb;--fg-dim:#a3afc2;--fg-mute:#6b778c;--cyan:#46c8ff;--sky:#8eb8d9}
*{box-sizing:border-box;margin:0;padding:0}
body{background:var(--bg);color:var(--fg);font-family:'Inter',system-ui,sans-serif;line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:var(--sky)}
a:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}
.top{position:sticky;top:0;z-index:5;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:16px 24px;background:rgba(5,7,13,.8);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.top img{height:22px;width:auto;display:block}
.top a.back{color:var(--fg-dim);text-decoration:none;font-size:.9rem;font-weight:500;padding:8px 14px;border:1px solid var(--line-2);border-radius:999px}
.top a.back:hover{color:var(--fg)}
main{max-width:820px;margin:0 auto;padding:64px 24px 96px}
@media(max-width:600px){main{padding:40px 16px 72px}}
h1{font-family:'Inter Tight',system-ui,sans-serif;font-size:clamp(2.2rem,6vw,3.4rem);letter-spacing:-.035em;line-height:1.05;margin-bottom:12px}
.sub{color:var(--fg-mute);margin-bottom:40px}
h2{font-family:'Inter Tight',system-ui,sans-serif;font-size:1.35rem;letter-spacing:-.02em;margin:44px 0 12px;padding-top:24px;border-top:1px solid var(--line);scroll-margin-top:90px}
h3{font-size:1rem;margin:22px 0 6px;scroll-margin-top:90px}
p,li{color:var(--fg-dim);font-size:.96rem}
p{margin-bottom:12px}
ul{margin:0 0 12px 20px}
strong{color:var(--fg);font-weight:600}
.card{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:22px 24px;margin-bottom:16px}
.toc{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:8px}
.toc a{font-size:.82rem;text-decoration:none;color:var(--fg-dim);padding:6px 12px;border-radius:999px;border:1px solid var(--line-2)}
.toc a:hover{color:var(--fg)}
footer{border-top:1px solid var(--line);padding:28px 24px;text-align:center;font-size:.82rem;color:var(--fg-mute)}
footer a{color:var(--fg-dim);text-decoration:none}