:root { color-scheme: dark; --bg: #090d14; --surface: #151a22; --text: #f4efe8; --muted: #c2c6ce; --accent: #8de2d1; --line: #66717e; --gap: 12px; }
* { box-sizing: border-box; }
body { margin: 0; padding: 0 20px; background: var(--bg); color: var(--text); font: 17px/1.7 system-ui, "Noto Sans CJK SC", sans-serif; overflow-wrap: anywhere; }
header, main, footer { width: 100%; max-width: 860px; margin: auto; }
header { padding: 24px 0; border-bottom: 1px solid var(--line); }
main { min-height: 55vh; padding: 32px 0 48px; }
footer { padding: 20px 0 32px; border-top: 1px solid var(--line); color: var(--muted); font-size: .85rem; }
a { color: var(--accent); text-underline-offset: 4px; cursor: pointer; }
a:hover { color: var(--text); }
a:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }
.brand { color: var(--text); font-weight: 750; text-decoration: none; }
.brand span, .muted { color: var(--muted); }
h1 { font-size: clamp(2rem, 5vw, 2.7rem); line-height: 1.2; margin: 0 0 20px; }
h2, h3, h4, h5, h6 { line-height: 1.35; margin: 32px 0 var(--gap); }
p, ul, ol, pre, blockquote, table { margin: 0 0 var(--gap); }
li + li { margin-top: 8px; }
nav { margin-bottom: 24px; }
img { display: block; max-width: 100%; height: auto; margin: var(--gap) 0; }
pre { overflow: auto; padding: 16px; background: var(--surface); border: 1px solid var(--line); }
code { font-size: .9em; }
blockquote { border-left: 3px solid var(--accent); padding-left: 16px; color: var(--muted); }
table { display: block; overflow-x: auto; border-collapse: collapse; }
th, td { padding: 8px 12px; border: 1px solid var(--line); text-align: left; }
.pages { list-style: none; padding: 0; }
.pages li { padding: 12px 0; border-bottom: 1px solid var(--line); }
.skip { position: fixed; top: -100px; left: 12px; z-index: 2; padding: 8px 12px; background: var(--surface); }
.skip:focus { top: 12px; }
@media (max-width: 480px) { body { padding: 0 16px; font-size: 16px; } main { padding-top: 24px; } }