:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --line: #e5e7eb;
  --accent: #2563eb;
  --ok: #15803d;
  --ok-bg: #dcfce7;
  --warn: #b45309;
  --warn-bg: #fef3c7;
  --fail: #b91c1c;
  --fail-bg: #fee2e2;
  --info-bg: #e0e7ff;
  --mono: ui-monospace, "SF Mono", Menlo, monospace;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1120;
    --card: #131c2e;
    --text: #e5e7eb;
    --muted: #94a3b8;
    --line: #243047;
    --accent: #60a5fa;
    --ok: #4ade80;
    --ok-bg: #12301f;
    --warn: #fbbf24;
    --warn-bg: #3a2a0a;
    --fail: #f87171;
    --fail-bg: #3b1212;
    --info-bg: #1e2a4a;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  padding: env(safe-area-inset-top) 0 calc(24px + env(safe-area-inset-bottom));
}
main { max-width: 680px; margin: 0 auto; padding: 0 16px; }
.top {
  display: flex; align-items: center; justify-content: space-between;
  max-width: 680px; margin: 0 auto; padding: 14px 16px 6px;
}
.brand { display: flex; align-items: center; gap: 10px; }
.logo {
  width: 26px; height: 26px; border-radius: 8px;
  background: radial-gradient(circle at 50% 50%, var(--ok) 0 30%, transparent 31%), #0f172a;
}
h1 { font-size: 22px; margin: 0; }
h2 { font-size: 17px; margin: 0 0 8px; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 14px;
  padding: 14px; margin: 12px 0;
}
.muted { color: var(--muted); }
.small { font-size: 13px; }
.error { color: var(--fail); }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.between { justify-content: space-between; }
button {
  font: inherit; font-weight: 600; border: 0; border-radius: 10px;
  padding: 9px 14px; background: var(--accent); color: #fff; cursor: pointer;
}
button.ghost { background: transparent; color: var(--accent); padding: 6px 8px; }
button:disabled { opacity: .5; }
input, textarea {
  font: inherit; width: 100%; padding: 10px 12px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--bg); color: var(--text);
}
textarea { resize: vertical; margin: 8px 0; }
#pair-form { display: flex; gap: 8px; }
#pair-code { letter-spacing: 2px; text-transform: uppercase; }
.pill {
  display: inline-block; font-size: 13px; font-weight: 600; padding: 3px 10px;
  border-radius: 999px; background: var(--info-bg);
}
.pill.ok { background: var(--ok-bg); color: var(--ok); }
.pill.warn { background: var(--warn-bg); color: var(--warn); }
.pill.fail { background: var(--fail-bg); color: var(--fail); }
.finding { border-radius: 14px; padding: 12px 14px; margin: 12px 0; }
.finding.critical { background: var(--fail-bg); }
.finding.warning { background: var(--warn-bg); }
.finding b { display: block; margin-bottom: 2px; }
.finding.critical b { color: var(--fail); }
.finding.warning b { color: var(--warn); }
.checks { list-style: none; margin: 6px 0 0; padding: 0; }
.checks li {
  display: grid; grid-template-columns: 12px 1fr; gap: 4px 10px;
  padding: 7px 0; border-top: 1px solid var(--line);
}
.checks li:first-child { border-top: 0; }
.dot { width: 10px; height: 10px; border-radius: 50%; margin-top: 7px; background: var(--muted); }
.dot.ok { background: var(--ok); }
.dot.warn { background: var(--warn); }
.dot.fail { background: var(--fail); }
.checks .detail { grid-column: 2; font-size: 13px; color: var(--muted); overflow-wrap: anywhere; }
.checks .hint { grid-column: 2; font-size: 13px; }
details summary { cursor: pointer; color: var(--accent); font-size: 14px; padding: 6px 0; }
.seg { display: inline-flex; background: var(--bg); border-radius: 10px; padding: 3px; margin: 4px 0 8px; }
.seg button { background: transparent; color: var(--text); padding: 6px 18px; }
.seg button.on { background: var(--card); box-shadow: 0 1px 3px rgba(0,0,0,.15); }
.presets { display: flex; gap: 8px; flex-wrap: wrap; }
.chip {
  background: var(--info-bg); color: var(--text); font-weight: 500;
  font-size: 13px; padding: 6px 10px; border-radius: 999px;
}
pre {
  font: 13px/1.45 var(--mono); white-space: pre-wrap; overflow-wrap: anywhere;
  background: var(--bg); border-radius: 10px; padding: 10px; margin: 8px 0 0;
  max-height: 60vh; overflow: auto;
}
ul.plain { list-style: none; padding: 0; margin: 0; }
ul.plain li { padding: 7px 0; border-top: 1px solid var(--line); font-size: 14px; }
ul.plain li:first-child { border-top: 0; }
.events time { color: var(--muted); font-size: 12px; display: block; }
.events .critical { color: var(--fail); }
.events .warning { color: var(--warn); }
.events .resolved { color: var(--ok); }
#ask-list li { cursor: pointer; }