body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #0f172a;
  color: white;
  text-align: center;
}

header {
  padding: 20px;
}

.brand {
  background: linear-gradient(45deg, #4f46e5, #22c55e);
  border: none;
  padding: 10px;
  border-radius: 10px;
  color: white;
}

.card {
  background: #1e293b;
  margin: 15px;
  padding: 20px;
  border-radius: 15px;
}

button {
  padding: 10px;
  border: none;
  border-radius: 10px;
}

canvas {
  display: none;
  background: black;
}