body {
  background: #334155;
  color: white;
  text-align: center;
  font-family: Arial;
}

.wrap {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 20px;
}

canvas {
  background: #cbd5e1; /* MLHA */
  border: 3px solid #38bdf8;
}

.panel {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

button {
  padding: 10px;
  border: none;
  border-radius: 6px;
  font-weight: bold;
  cursor: pointer;
}

.red { background:#ef4444; }
.green { background:#22c55e; }
.blue { background:#3b82f6; }

#activeDoor {
  margin-top: 15px;
  padding: 10px;
  background: #64748b;
  border-radius: 6px;
}