:root {
  --bg: #0c1222;
  --surface: #141c2f;
  --surface2: #1a2438;
  --text: #e8edf5;
  --muted: #8b9bb4;
  --accent: #3dd6c7;
  --cold: #4da3ff;
  --ok: #5ecf7a;
  --hot: #ff6b6b;
  --warn: #ffc857;
  --danger: #ff4757;
  --radius: 14px;
  --font: "Segoe UI", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  background: radial-gradient(ellipse 120% 80% at 50% -20%, #1a2a4a 0%, var(--bg) 55%);
  color: var(--text);
  line-height: 1.5;
}

.app {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.25rem 1rem 2rem;
}

.header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-icon {
  font-size: 2.25rem;
  line-height: 1;
}

.header h1 {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.subtitle {
  margin: 0;
  font-size: 0.85rem;
  color: var(--muted);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.btn {
  font: inherit;
  cursor: pointer;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 10px;
  padding: 0.45rem 0.85rem;
  background: var(--surface2);
  color: var(--text);
}

.btn-ghost:hover {
  background: rgba(61, 214, 199, 0.12);
  border-color: rgba(61, 214, 199, 0.35);
}

.live-badge {
  font-size: 0.75rem;
  padding: 0.35rem 0.65rem;
  border-radius: 999px;
  background: var(--surface2);
  color: var(--muted);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.live-badge.ok {
  color: var(--ok);
  border-color: rgba(94, 207, 122, 0.35);
}

.live-badge.err {
  color: var(--danger);
  border-color: rgba(255, 71, 87, 0.35);
}

.alerts {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1rem;
  min-height: 0;
}

.alert {
  padding: 0.65rem 1rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  border-left: 4px solid;
  background: var(--surface);
}

.alert.warn {
  border-color: var(--warn);
  background: rgba(255, 200, 87, 0.08);
}

.alert.danger {
  border-color: var(--danger);
  background: rgba(255, 71, 87, 0.1);
}

.alert.info {
  border-color: var(--cold);
  background: rgba(77, 163, 255, 0.08);
}

.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 1.15rem 1.25rem;
  border: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
}

.card-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

.card-temp .card-value {
  font-size: 2.75rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.card-temp.cold {
  border-color: rgba(77, 163, 255, 0.35);
  box-shadow: 0 0 0 1px rgba(77, 163, 255, 0.15);
}

.card-temp.normal {
  border-color: rgba(94, 207, 122, 0.35);
}

.card-temp.hot {
  border-color: rgba(255, 107, 107, 0.45);
}

.card-temp .card-value {
  color: var(--accent);
}

.card-temp.cold .card-value {
  color: var(--cold);
}

.card-temp.normal .card-value {
  color: var(--ok);
}

.card-temp.hot .card-value {
  color: var(--hot);
}

.card-unit {
  display: inline;
  font-size: 1.25rem;
  color: var(--muted);
  margin-left: 0.15rem;
}

.card-status {
  margin-top: 0.5rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.level-wrap {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 0.25rem;
}

.level-bar {
  flex: 1;
  height: 18px;
  border-radius: 999px;
  background: var(--surface2);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.level-fill {
  height: 100%;
  width: 0%;
  border-radius: 999px;
  background: linear-gradient(90deg, #3d8bfd, var(--accent));
  transition: width 0.4s ease;
}

.level-pct {
  font-size: 1.35rem;
  font-weight: 700;
  min-width: 3.5rem;
  text-align: right;
  color: var(--accent);
}

.card-meta .meta-time {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.stats-mini {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem 1rem;
  margin: 0;
  font-size: 0.85rem;
}

.stats-mini dt {
  margin: 0;
  color: var(--muted);
  font-weight: 400;
}

.stats-mini dd {
  margin: 0;
  font-weight: 600;
}

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

@media (min-width: 900px) {
  .charts {
    grid-template-columns: 1fr 1fr;
  }
}

.chart-box {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 1rem 1rem 0.5rem;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.chart-box h2 {
  margin: 0 0 0.75rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--muted);
}

.chart-box canvas {
  max-height: 220px;
}

.footer {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 0.8rem;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
}

.footer code {
  font-size: 0.78rem;
  background: var(--surface2);
  padding: 0.15rem 0.4rem;
  border-radius: 6px;
}