:root {
  --bg: #f5f6f8;
  --card-bg: #ffffff;
  --border: #dde1e6;
  --text: #1f2430;
  --muted: #6b7280;
  --accent: #2f6fed;
  --accent-hover: #2559c9;
  --ok: #1a9e6b;
  --down: #d64545;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.banner {
  background: #1f2430;
  color: #fff;
  padding: 0.75rem 1.5rem;
  font-size: 0.9rem;
  line-height: 1.4;
}

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

h1 {
  font-size: 1.5rem;
  margin-bottom: 0.25rem;
}

.subtitle {
  color: var(--muted);
  margin-top: 0;
  margin-bottom: 2rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem;
}

.card h2 {
  margin-top: 0;
  font-size: 1.1rem;
}

.counter {
  font-size: 2.25rem;
  font-weight: 700;
  margin: 0.25rem 0 0;
  line-height: 1;
}

.counter-label {
  margin: 0.15rem 0 0.5rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.meta {
  color: var(--muted);
  font-size: 0.85rem;
}

button {
  margin-top: 0.75rem;
  padding: 0.6rem 1rem;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 0.95rem;
  cursor: pointer;
  width: 100%;
}

button:disabled {
  background: #b7c3da;
  cursor: not-allowed;
}

button:not(:disabled):hover {
  background: var(--accent-hover);
}

.status {
  font-weight: 600;
  font-size: 1.1rem;
}

.status.ok {
  color: var(--ok);
}

.status.down {
  color: var(--down);
}

details {
  margin-top: 0.75rem;
  font-size: 0.8rem;
}

summary {
  cursor: pointer;
  color: var(--muted);
}

pre {
  background: #f0f2f5;
  padding: 0.5rem;
  border-radius: 6px;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.8rem;
  padding: 1.5rem;
}

@media (max-width: 480px) {
  main {
    padding: 1.25rem 1rem;
  }

  .counter {
    font-size: 1.75rem;
  }
}