body {
  font-family: sans-serif;
  background-color: #121212;
  color: #f0f0f0;
  text-align: center;
  padding: 40px;
}

h2 {
  margin-bottom: 20px;
}

.topic-box {
  margin-bottom: 20px;
}

input[type="text"] {
  padding: 8px;
  font-size: 16px;
  border-radius: 6px;
  border: 1px solid #444;
  background-color: #1f1f1f;
  color: #fff;
}

button {
  padding: 10px 20px;
  margin-left: 10px;
  font-size: 16px;
  cursor: pointer;
  background-color: #1f1f1f;
  color: #fff;
  border: 1px solid #333;
  border-radius: 6px;
}

button:hover {
  background-color: #333;
}

.panel {
  background: #1f1f1f;
  border-radius: 12px;
  padding: 20px;
  margin: 20px auto;
  max-width: 400px;
  box-shadow: 0 0 10px rgba(0,0,0,0.5);
}

.icon {
  font-size: 32px;
  margin-bottom: 10px;
}

.value {
  font-size: 24px;
  font-weight: bold;
  margin-bottom: 10px;
}

canvas {
  max-width: 100%;
  height: 200px;
}

.status {
  margin-top: 20px;
  color: #ccc;
}