:root {
  --bg: #fbf7ee;
  --card: #ffffff;
  --ink: #25263a;
  --muted: #6b6f7c;
  --line: #e7e1d3;
  --accent: #2f6fde;
  --accent-ink: #ffffff;
  --ok: #2fa866;
  --warn: #c0532b;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1d22;
    --card: #26272e;
    --ink: #f1f1f4;
    --muted: #a2a6b2;
    --line: #383a44;
    --accent: #6a9cff;
    --accent-ink: #101114;
    --ok: #52c98a;
    --warn: #ff8a66;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", sans-serif;
  line-height: 1.7;
  font-size: 16px;
}
.wrap { max-width: 720px; margin: 0 auto; padding: 32px 16px 56px; }
header.site { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 28px; }
header.site a.brand { color: var(--ink); text-decoration: none; font-weight: 800; font-size: 20px; letter-spacing: .02em; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 24px 20px; }
h1 { font-size: 28px; line-height: 1.35; margin: 0 0 8px; }
h2 { font-size: 19px; margin: 28px 0 6px; }
p, li { color: var(--ink); }
.muted { color: var(--muted); }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 48px; padding: 10px 22px; border-radius: 999px; border: 0;
  background: var(--accent); color: var(--accent-ink); font-size: 16px; font-weight: 700;
  cursor: pointer; text-decoration: none;
}
.btn.ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.btn:disabled { opacity: .6; cursor: default; }
.row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.status { margin-top: 16px; padding: 12px 14px; border-radius: 12px; border: 1px solid var(--line); }
.status.ok { border-color: var(--ok); }
.status.bad { border-color: var(--warn); }
footer.site { margin-top: 36px; font-size: 14px; color: var(--muted); display: flex; gap: 16px; flex-wrap: wrap; }
footer.site a { color: var(--muted); }
ul { padding-left: 1.3em; }
.hidden { display: none !important; }