:root {
  --bg: #1a0f10;
  --bg-alt: #231617;
  --card: #2b1a1c;
  --border: #4a2c2e;
  --text: #fbeeee;
  --text-muted: #b39a9b;
  --accent: #ff282d;
  --accent-2: #ffb238;
  --ok: #2ecc71;
  --radius: 12px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: linear-gradient(180deg, var(--bg) 0%, #0d0708 100%);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  padding: 32px 20px 60px;
}
.wrap { max-width: 900px; margin: 0 auto; }
.banner {
  background: var(--card);
  border: 1px solid var(--border);
  border-top: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 28px;
  text-align: center;
  margin-bottom: 20px;
}
.banner h1 { margin: 0 0 8px; font-size: 1.5rem; }
.banner .sub { color: var(--text-muted); font-size: 0.92rem; }
.banner .dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: var(--ok); margin-right: 6px; }
.grid {
  display: grid;
  grid-template-columns: 1fr 1.35fr;
  grid-template-areas:
    "nav   probe"
    "diag  probe";
  align-items: stretch;
  gap: 16px;
}
.nav-card { grid-area: nav; }
.probe-card { grid-area: probe; }
.diag-card { grid-area: diag; }
.nav-card, .diag-card {
  display: flex;
  flex-direction: column;
  justify-content: center;
}
@media (max-width: 720px) {
  .grid {
    grid-template-columns: 1fr;
    grid-template-areas: "nav" "probe" "diag";
  }
  .nav-card, .diag-card { justify-content: flex-start; }
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}
.card h2 {
  font-size: 1rem;
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--accent);
  display: inline-block;
}
.metrics { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.metric {
  background: var(--bg-alt);
  border-radius: 8px;
  padding: 12px;
  text-align: center;
}
.metric .val { font-size: 1.3rem; font-weight: 700; }
.metric .lbl { font-size: 0.75rem; color: var(--text-muted); margin-top: 2px; }
.desc { color: var(--text-muted); font-size: 0.88rem; margin: 0 0 14px; }
.btn-row { display: flex; gap: 10px; margin-bottom: 14px; }
button.probe {
  background: var(--accent);
  color: #2a0405;
  border: none;
  border-radius: 999px;
  padding: 9px 16px;
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
}
button.probe:hover { background: #ff5559; }
.fetch-result { background: var(--bg-alt); border-radius: 8px; padding: 12px; text-align: center; }
.fetch-result .val { font-size: 1.1rem; font-weight: 700; }
.fetch-result .lbl { font-size: 0.72rem; color: var(--text-muted); margin-top: 2px; }
.probe-group { margin-top: 16px; }
.probe-group:first-of-type { margin-top: 18px; }
.probe-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent-2);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 8px;
}
.diag p { margin: 8px 0; font-size: 0.9rem; }
.diag b { color: var(--accent-2); }
.log-btn {
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  margin-top: 6px;
}
.log-btn:hover { background: rgba(255,40,45,0.14); }
pre#log {
  background: #0a0505;
  border-radius: 8px;
  padding: 12px;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 10px;
  max-height: 160px;
  overflow: auto;
  display: none;
  white-space: pre-wrap;
}
.footer {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.82rem;
  margin-top: 20px;
  padding: 16px;
  border-top: 1px solid var(--border);
}
.footer .cf { color: var(--accent); font-weight: 600; }