:root {
  color-scheme: light dark;
  --fg: #1b1f24;
  --bg: #ffffff;
  --muted: #59636e;
  --line: #d1d9e0;
  --accent: #0b57d0;
  --draft-bg: #fff4d6;
  --draft-fg: #5c3d00;
  --todo-bg: #ffe08a;
  --code-bg: #f1f3f5;
}
@media (prefers-color-scheme: dark) {
  :root {
    --fg: #e6edf3;
    --bg: #0d1117;
    --muted: #9198a1;
    --line: #30363d;
    --accent: #79b8ff;
    --draft-bg: #3a2c00;
    --draft-fg: #ffdf8a;
    --todo-bg: #6b5100;
    --code-bg: #1c2128;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.8 system-ui, -apple-system, "Segoe UI", "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", sans-serif;
}
.site-header, main, .site-footer { max-width: 44rem; margin: 0 auto; padding: 0 1rem; }
.site-header { padding-top: 1.25rem; padding-bottom: 1rem; border-bottom: 1px solid var(--line); }
.brand { font-weight: 700; font-size: 1.125rem; color: var(--fg); text-decoration: none; }
main { padding-top: 1.5rem; padding-bottom: 2rem; }
h1 { font-size: 1.75rem; line-height: 1.3; margin: 0 0 1rem; }
h2 { font-size: 1.25rem; line-height: 1.4; margin: 2rem 0 0.5rem; }
a { color: var(--accent); }
ul { padding-left: 1.5rem; }
.draft { margin: 0 0 1.5rem; padding: 0.75rem 1rem; border-radius: 0.5rem; background: var(--draft-bg); color: var(--draft-fg); }
.todo { background: var(--todo-bg); color: inherit; padding: 0 0.15em; border-radius: 0.2em; }
.site-footer { padding-top: 1rem; padding-bottom: 2rem; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.875rem; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; margin-bottom: 0.5rem; }
.site-footer p { margin: 0.25rem 0; }
@media print { .draft { border: 1px solid; } }
blockquote { margin: 1rem 0; padding: 0.25rem 1rem; border-left: 4px solid var(--line); color: var(--muted); }
blockquote p { margin: 0.5rem 0; }
code { font: 0.9em ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; background: var(--code-bg); padding: 0.1em 0.35em; border-radius: 0.25em; }
.table-wrap { overflow-x: auto; margin: 1rem 0; }
table { width: 100%; border-collapse: collapse; font-size: 0.9375rem; line-height: 1.6; }
th, td { border: 1px solid var(--line); padding: 0.5rem 0.75rem; text-align: left; vertical-align: top; }
th { background: var(--code-bg); }
li > ul, li > ol { margin: 0.25rem 0; }