:root {
  --ok-a: #2ecc71;
  --ok-b: #3498db;
  --unknown: #95a5a6;
  --timeout: #e67e22;
  --error: #e74c3c;
  --control: #f1c40f;
}

* { box-sizing: border-box; }

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  margin: 0;
  padding: 1rem 1.5rem 3rem;
  background: #f7f8fa;
  color: #1c1e21;
}

header h1 { margin-bottom: 0.1rem; }
.subtitle { margin-top: 0; color: #555; }

section { margin-top: 1.5rem; }

.controls {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
  flex-wrap: wrap;
}

.origin-panel {
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 8px;
  padding: 1rem;
  min-width: 280px;
}

.control-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.control-row label { flex: 1; font-size: 0.9rem; }

.state { margin-top: 0.5rem; font-size: 0.85rem; color: #444; }

#refresh-state {
  align-self: center;
  height: fit-content;
  padding: 0.5rem 0.9rem;
  cursor: pointer;
}

.legend {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  font-size: 0.85rem;
}

.swatch {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 2px;
  margin-right: 0.3rem;
  vertical-align: middle;
}
.ok-a { background: var(--ok-a); }
.ok-b { background: var(--ok-b); }
.unknown { background: var(--unknown); }
.timeout { background: var(--timeout); }
.error { background: var(--error); }
.control-marker { background: var(--control); }

.timeline {
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 8px;
  padding: 1rem;
}

.lane-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.lane-label {
  width: 240px;
  flex-shrink: 0;
  font-size: 0.8rem;
  color: #333;
}

.lane-canvas {
  flex: 1;
  height: 30px;
  border-radius: 4px;
  background: #eee;
}

.chart-section {
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 8px;
  padding: 1rem;
}

.log {
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 8px;
  padding: 1rem;
  max-height: 400px;
  overflow-y: auto;
}

#log-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

#log-table th, #log-table td {
  text-align: left;
  padding: 0.3rem 0.5rem;
  border-bottom: 1px solid #eee;
}

.note-row { background: #fff8e1; }