:root {
  --bg: #ffffff; --fg: #0f172a; --muted: #64748b; --line: #e2e8f0; --card: #f8fafc;
  --accent: #0f766e; --warn: #b45309; --bad: #b91c1c;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0b1220; --fg: #e2e8f0; --muted: #94a3b8; --line: #1e293b; --card: #111a2e; --accent: #2dd4bf; --warn: #fbbf24; --bad: #f87171; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.5 system-ui, -apple-system, "PingFang TC", "Noto Sans TC", sans-serif; }
main { max-width: 720px; margin: 0 auto; padding: 16px; }
h1 { font-size: 1.4rem; margin: 8px 0; }
h2 { font-size: 1.1rem; margin: 24px 0 8px; }
a { color: var(--accent); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; margin: 8px 0; }
.muted { color: var(--muted); font-size: 0.9rem; }
.warn { color: var(--warn); }
.bad { color: var(--bad); }
.big { font-size: 1.3rem; font-weight: 600; }
.scroll { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
th, td { text-align: left; padding: 6px 4px; border-bottom: 1px solid var(--line); vertical-align: top; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
form { display: grid; gap: 8px; }
label { display: grid; gap: 2px; font-size: 0.9rem; }
input, select, textarea, button { font: inherit; padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--bg); color: var(--fg); width: 100%; }
button { background: var(--accent); color: #fff; border: 0; cursor: pointer; width: auto; justify-self: start; }
button.secondary { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
.row { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 8px; }
details > summary { cursor: pointer; color: var(--accent); }