body {
  margin: 0;
  font-family: Arial, sans-serif;
}

header {
  background: #1e40af;
  color: white;
  padding: 10px;
  display: flex;
  justify-content: space-between;
}

#map {
  height: 60vh;
}

.info {
  padding: 10px;
  background: #f1f5f9;
}

.online {
  color: #22c55e;
  font-weight: bold;
}

.offline {
  color: #ef4444;
  font-weight: bold;
}