:root {
  color-scheme: dark;
  --bg: #0f1216;
  --panel: #171b21;
  --panel-border: #262c35;
  --text: #e7eaee;
  --text-dim: #8b93a1;
  --accent: #4fd1a5;
  --danger: #f56565;
  --warning: #f6ad55;
}

* {
  box-sizing: border-box;
}

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

.page {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.75rem;
}

.title-block {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.title-block h1 {
  font-size: 1.5rem;
  margin: 0;
}

.badge {
  display: inline-block;
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
}

.badge--online {
  background: rgba(79, 209, 165, 0.15);
  color: var(--accent);
}

.badge--offline {
  background: rgba(245, 101, 101, 0.15);
  color: var(--danger);
}

.badge--unknown {
  background: rgba(139, 147, 161, 0.15);
  color: var(--text-dim);
}

.last-update {
  color: var(--text-dim);
  font-size: 0.85rem;
}

.tiles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.tile {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  padding: 1.1rem 1.25rem;
}

.tile-label {
  color: var(--text-dim);
  font-size: 0.85rem;
  margin-bottom: 0.4rem;
}

.tile-value {
  font-size: 2rem;
  font-weight: 700;
}

.chart-section {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  padding: 1.25rem;
}

.chart-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.chart-header h2 {
  font-size: 1rem;
  margin: 0;
  color: var(--text-dim);
  font-weight: 600;
}

.range-buttons button {
  background: transparent;
  border: 1px solid var(--panel-border);
  color: var(--text-dim);
  padding: 0.3rem 0.7rem;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.8rem;
  margin-left: 0.3rem;
}

.range-buttons button.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #0f1216;
  font-weight: 600;
}

.footer {
  margin-top: 1.5rem;
}

.error-banner {
  display: block;
  background: rgba(245, 101, 101, 0.12);
  color: var(--danger);
  border: 1px solid rgba(245, 101, 101, 0.35);
  border-radius: 8px;
  padding: 0.6rem 0.9rem;
  font-size: 0.85rem;
}

.error-banner[hidden] {
  display: none;
}