body {
  background-color: #121212;
  color: #ddd;
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 20px;
}
.container {
  max-width: 800px;
  margin: auto;
}
h1 {
  text-align: center;
  margin-bottom: 20px;
}
.status-card {
  text-align: center;
  margin-bottom: 20px;
  font-size: 1.2em;
}
.status {
  padding: 5px 10px;
  border-radius: 4px;
  font-weight: bold;
}
.status.online { background: limegreen; color: #000; }
.status.offline { background: crimson; color: #fff; }
.metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 15px;
  margin-bottom: 20px;
}
.metric {
  background: #1e1e1e;
  padding: 10px;
  border-radius: 6px;
  text-align: center;
}
.label {
  font-size: 0.9em;
  color: #888;
}
canvas {
  background: #1e1e1e;
  border-radius: 6px;
  padding: 10px;
}