:root {
  --bg: #0b0e14;
  --panel: #12161f;
  --panel-border: #232838;
  --text: #e6e9f0;
  --muted: #7c8494;
  --up: #34d399;
  --up-dim: rgba(52, 211, 153, 0.12);
  --down: #f87171;
  --down-dim: rgba(248, 113, 113, 0.12);
  --unknown: #6b7280;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Consolas, "Roboto Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  min-height: 100vh;
}

.topbar {
  border-bottom: 1px solid var(--panel-border);
  background: var(--panel);
  position: sticky;
  top: 0;
  z-index: 10;
}

.topbar-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 20px 24px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

h1 {
  font-size: 1.15rem;
  font-weight: 650;
  letter-spacing: -0.01em;
  margin: 0;
  display: flex;
  align-items: center;
  gap: 10px;
}

.dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--unknown);
  box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.04);
}
.dot-up { background: var(--up); box-shadow: 0 0 0 4px var(--up-dim); }
.dot-down { background: var(--down); box-shadow: 0 0 0 4px var(--down-dim); animation: blink 1.6s infinite; }

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

.summary {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--muted);
}

.site-list {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px;
  display: grid;
  gap: 14px;
}

.empty-state {
  color: var(--muted);
  font-size: 0.9rem;
}

.card {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-left: 3px solid var(--unknown);
  border-radius: 10px;
  padding: 16px 18px;
  transition: border-color 0.2s ease;
}
.card-up { border-left-color: var(--up); }
.card-down { border-left-color: var(--down); }

.card-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 6px 14px;
  margin-bottom: 12px;
}

.card-title {
  display: flex;
  align-items: center;
  gap: 10px;
}

.site-name {
  font-size: 1rem;
  font-weight: 600;
  margin: 0;
}

.site-url {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--muted);
  text-decoration: none;
}
.site-url:hover { color: var(--text); text-decoration: underline; }

.pill {
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 3px 8px;
  border-radius: 5px;
  line-height: 1.4;
}
.pill.up { background: var(--up-dim); color: var(--up); }
.pill.down { background: var(--down-dim); color: var(--down); }
.pill.unknown { background: rgba(107, 114, 128, 0.15); color: var(--unknown); }

.metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: 10px 16px;
  margin-bottom: 12px;
}

.metric-label {
  display: block;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin-bottom: 2px;
}

.metric-value {
  font-family: var(--mono);
  font-size: 0.9rem;
}

.pulse-strip {
  display: flex;
  gap: 2px;
  align-items: flex-end;
  height: 18px;
}

.tick {
  flex: 1 1 0;
  min-width: 2px;
  height: 100%;
  border-radius: 1px;
}
.tick-up { background: var(--up); opacity: 0.85; }
.tick-down { background: var(--down); }

.pulse-empty {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--muted);
}

.error-line {
  display: none;
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--down);
}
.error-line.visible { display: block; }

footer {
  max-width: 960px;
  margin: 0 auto;
  padding: 8px 24px 32px;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--muted);
}

@media (prefers-reduced-motion: reduce) {
  .dot-down { animation: none; }
}