:root{--ink:#1b2430;--muted:#5b6675;--line:#e3e7ee;--bg:#f7f8fa;--accent:#5b34c9}
@media(prefers-color-scheme:dark){:root{--ink:#e8ecf2;--muted:#a3adbb;--line:#2b3442;--bg:#12171f;--accent:#a78bfa}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 "Be Vietnam Pro",Inter,system-ui,-apple-system,"Segoe UI",sans-serif}
main{max-width:760px;margin:0 auto;padding:28px 16px 56px}
nav{display:flex;flex-wrap:wrap;gap:6px 16px;font-size:14px;margin-bottom:22px}nav a{color:var(--accent);text-decoration:none}nav a:hover{text-decoration:underline}
h1{font-size:1.6rem;line-height:1.3;margin:0 0 4px}.ver{color:var(--muted);font-size:14px;margin:0 0 22px}
h2{font-size:1.1rem;margin:28px 0 6px}p,li{margin:6px 0}ul{padding-left:22px}
.box{border:1px solid var(--line);border-radius:12px;padding:12px 16px;margin:16px 0}
footer{margin-top:36px;padding-top:14px;border-top:1px solid var(--line);color:var(--muted);font-size:14px}
a{color:var(--accent)}