:root{--orange:#ff6b00;--bg:#fafafa;--text:#1f2937;--muted:#6b7280;--dark:#171717;--border:#e5e7eb}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.7 Inter,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
a{color:var(--orange)}
header{background:var(--dark);border-bottom:1px solid #262626}
.bar{max-width:880px;margin:0 auto;padding:16px 20px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:#fff;font-weight:800;font-size:22px;letter-spacing:-.02em}
.brand svg{width:36px;height:36px}
.brand small{display:block;font-size:9px;font-weight:500;letter-spacing:.22em;text-transform:uppercase;color:var(--orange)}
.back{color:#d1d5db;text-decoration:none;font-size:14px}
.back:hover{color:var(--orange)}
main{max-width:880px;margin:0 auto;padding:40px 20px 64px}
h1{font-size:clamp(28px,5vw,40px);line-height:1.2;margin:0 0 8px;letter-spacing:-.02em}
.updated{color:var(--muted);font-size:14px;margin:0 0 32px}
h2{font-size:21px;margin:40px 0 12px;padding-top:8px;border-top:1px solid var(--border)}
h3{font-size:17px;margin:24px 0 8px}
ul{padding-left:22px}
li{margin:6px 0}
.box{background:#fff;border:1px solid var(--border);border-left:4px solid var(--orange);border-radius:8px;padding:16px 20px;margin:20px 0}
.toc{background:#fff;border:1px solid var(--border);border-radius:8px;padding:16px 20px 16px 40px;margin:0 0 24px}
footer{background:var(--dark);color:#9ca3af;font-size:14px}
footer .bar{flex-wrap:wrap}
footer nav{display:flex;gap:16px;flex-wrap:wrap}
footer a{color:#d1d5db;text-decoration:none}
footer a:hover{color:var(--orange)}