:root {
  color-scheme: dark;
  --bg: #0f1117;
  --card: #1a1f2e;
  --text: #e8ecf4;
  --muted: #8b93a7;
  --ok: #3dd68c;
  --bad: #ff6b6b;
  --warn: #f0b429;
  --chart-line: #3dd68c;
  --chart-fill: rgba(61, 214, 140, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: radial-gradient(1200px 600px at 50% -10%, #243049 0%, var(--bg) 55%);
  color: var(--text);
  padding: 24px 16px 40px;
}

.wrap {
  max-width: 560px;
  margin: 0 auto;
}

h1 {
  font-size: 1.35rem;
  margin: 0 0 6px;
  font-weight: 700;
}

h2.charts-title {
  font-size: 1rem;
  margin: 28px 0 12px;
  font-weight: 600;
  color: var(--muted);
}

.sub {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 20px;
}

.nodes {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  position: relative;
}

.node {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  background: var(--card);
  border-radius: 14px;
  padding: 14px 16px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  will-change: transform;
  transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1), opacity 0.35s ease;
}

.node.is-flipping {
  transition: none;
}

.node .name {
  font-weight: 600;
}

.node .ping {
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}

.node.ok .ping {
  color: var(--ok);
}

.node.bad .ping {
  color: var(--bad);
}

.node.warn .ping {
  color: var(--warn);
}

.node.muted .ping {
  color: var(--muted);
}

.charts-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

@media (max-width: 420px) {
  .charts-grid {
    grid-template-columns: 1fr;
  }
}

.chart-card {
  background: var(--card);
  border-radius: 12px;
  padding: 10px 10px 8px;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.chart-card.disabled {
  opacity: 0.55;
}

.chart-card .chart-name {
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chart-card canvas {
  display: block;
  width: 100%;
  height: 116px;
  min-height: 116px;
}

footer {
  margin-top: 22px;
  color: var(--muted);
  font-size: 0.8rem;
  text-align: center;
}

.empty {
  color: var(--muted);
  padding: 12px 0;
}