:root{--bg:#fff;--text:#262626;--muted:#737373;--line:#dbdbdb;--blue:#0095f6;--warn:#fff3cd}
@media (prefers-color-scheme:dark){:root{--bg:#000;--text:#f5f5f5;--muted:#a8a8a8;--line:#262626;--warn:#4a3d00}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);font:15px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased}
main{max-width:640px;margin:0 auto;padding:calc(env(safe-area-inset-top,0px) + 16px) 16px calc(env(safe-area-inset-bottom,0px) + 40px)}
.back{display:inline-block;color:var(--blue);text-decoration:none;font-weight:600;margin-bottom:12px}
h1{font-size:24px;margin:8px 0 16px}
h2{font-size:17px;margin:28px 0 6px}
p,li{margin:0 0 10px}
ul{padding-left:20px;margin:0 0 10px}
a{color:var(--blue)}
mark{background:var(--warn);color:inherit;padding:0 4px;border-radius:4px}
.muted{color:var(--muted);font-size:13px}
footer{margin-top:32px;padding-top:16px;border-top:1px solid var(--line);display:flex;gap:16px}