:root {
  --bg: #f6f7f9; --fg: #1d232b; --muted: #66707c; --card: #fff; --line: #d9dde3;
  --accent: #1f5fa8; --on-accent: #fff; --ok: #1d8a4a; --off: #8a939e; --bad: #b3261e;
  font-family: -apple-system, "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", system-ui, sans-serif;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #15181c; --fg: #e4e7eb; --muted: #9aa3ad; --card: #1e2227; --line: #333a42;
          --accent: #6ea8ff; --on-accent: #0b1220; --ok: #4cc27a; --off: #77808a; --bad: #ff7a70; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font-size: 15px; line-height: 1.5; }
h1 { font-size: 20px; margin: 0 0 8px; }
main { padding: 16px; max-width: 1100px; margin: 0 auto; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 24px; margin: 48px auto; }
.narrow { max-width: 380px; }
.muted { color: var(--muted); }
.error { color: var(--bad); min-height: 1.5em; }
label { display: block; margin: 12px 0; }
input { display: block; width: 100%; margin-top: 4px; padding: 8px 10px; font-size: 15px;
        border: 1px solid var(--line); border-radius: 6px; background: var(--bg); color: var(--fg); }
button { padding: 8px 16px; font-size: 15px; border: 0; border-radius: 6px; background: var(--accent);
         color: var(--on-accent); cursor: pointer; }
button:disabled { opacity: .6; cursor: default; }
.bar { display: flex; gap: 12px; align-items: center; padding: 12px 16px; background: var(--card);
       border-bottom: 1px solid var(--line); }
.bar h1 { margin: 0; flex: 1; }
.bar button { background: transparent; color: var(--accent); border: 1px solid var(--line); }
table { width: 100%; border-collapse: collapse; background: var(--card); border: 1px solid var(--line); border-radius: 10px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); white-space: nowrap; }
th { font-weight: 600; color: var(--muted); font-size: 13px; }
tbody tr { cursor: pointer; }
tbody tr:hover { background: var(--bg); }
tbody tr:last-child td { border-bottom: 0; }
.on { color: var(--ok); }
.off { color: var(--off); }
.bad { color: var(--bad); }
code { font-size: 13px; }
@media (max-width: 720px) {
  table, thead, tbody, tr, th, td { display: block; }
  thead { display: none; }
  tr { border-bottom: 1px solid var(--line); padding: 8px 0; }
  td { border: 0; padding: 2px 12px; white-space: normal; }
  td::before { content: attr(data-h) "："; color: var(--muted); }
}
.small { font-size: 13px; }
a.button { display: block; text-align: center; padding: 10px 16px; font-size: 15px; border-radius: 6px;
           text-decoration: none; margin: 16px 0 4px; }
a.button.primary { background: var(--accent); color: var(--on-accent); }
a.button.primary:focus-visible, button:focus-visible, summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
details { margin-top: 16px; border-top: 1px solid var(--line); padding-top: 12px; }
summary { cursor: pointer; color: var(--muted); }