:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --text: #1b1d21;
  --muted: #646a73;
  --border: #e2e4e8;
  --accent: #2f6fdb;
  --ok: #1f8a4c;
  --ok-bg: #e5f5ec;
  --warn: #a86400;
  --warn-bg: #fdf1dc;
  --bad: #c42b2b;
  --bad-bg: #fbe6e6;
  --na: #7a7f87;
  --na-bg: #eef0f2;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111317;
    --card: #1b1e24;
    --text: #e8eaed;
    --muted: #9aa0a8;
    --border: #2c3038;
    --accent: #6f9ef0;
    --ok: #5fd08f;
    --ok-bg: #143322;
    --warn: #f0b35a;
    --warn-bg: #3a2a10;
    --bad: #f07a7a;
    --bad-bg: #3d1818;
    --na: #9aa0a8;
    --na-bg: #252931;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC", "Microsoft JhengHei", sans-serif;
}
main { max-width: 720px; margin: 0 auto; padding: 16px; }
header { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
h1 { font-size: 20px; margin: 8px 0 16px; }
h2 { font-size: 15px; margin: 0 0 8px; }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 12px;
}
.hint { color: var(--muted); font-size: 13px; margin: 0 0 10px; }
button {
  font: inherit;
  border: 0;
  border-radius: 8px;
  padding: 8px 14px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
}
button:disabled { opacity: .5; cursor: default; }
.row { display: flex; gap: 8px; }
input {
  font: inherit;
  flex: 1;
  min-width: 0;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  text-transform: uppercase;
}

.summary { text-align: center; padding: 20px 16px; }
.summary-ip { font-size: 26px; font-weight: 700; word-break: break-all; font-variant-numeric: tabular-nums; }
.summary-loc { color: var(--muted); margin-top: 4px; }
.summary-verdict {
  display: inline-block;
  margin-top: 12px;
  padding: 4px 12px;
  border-radius: 999px;
  font-weight: 600;
}
.summary[data-status="ok"] .summary-verdict { background: var(--ok-bg); color: var(--ok); }
.summary[data-status="warn"] .summary-verdict { background: var(--warn-bg); color: var(--warn); }
.summary[data-status="bad"] .summary-verdict { background: var(--bad-bg); color: var(--bad); }
.summary[data-status="pending"] .summary-verdict { background: var(--na-bg); color: var(--na); }

.checks { list-style: none; margin: 0; padding: 0; }
.checks li {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 10px;
  padding: 8px 0;
  border-top: 1px solid var(--border);
}
.checks li:first-child { border-top: 0; }
.badge {
  align-self: start;
  text-align: center;
  font-size: 12px;
  font-weight: 600;
  border-radius: 6px;
  padding: 2px 0;
}
.badge.ok { background: var(--ok-bg); color: var(--ok); }
.badge.warn { background: var(--warn-bg); color: var(--warn); }
.badge.bad { background: var(--bad-bg); color: var(--bad); }
.badge.na, .badge.info { background: var(--na-bg); color: var(--na); }
.check-title { font-weight: 600; }
.check-detail { color: var(--muted); font-size: 13px; word-break: break-word; }

.kv { display: grid; grid-template-columns: max-content 1fr; gap: 6px 16px; margin: 0; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; word-break: break-all; }

.list .item { padding: 6px 0; border-top: 1px solid var(--border); word-break: break-all; }
.list .item:first-child { border-top: 0; }
.list .sub { color: var(--muted); font-size: 13px; }

footer { color: var(--muted); font-size: 12px; text-align: center; margin: 20px 0; }
code { font-size: 12px; }