body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #111;
  color: white;
  text-align: center;
}

.container {
  padding: 20px;
}

#phase-selector {
  margin-bottom: 20px;
}

#color-row {
  display: flex;
  justify-content: center;
  gap: 15px;
  margin: 20px 0;
}

.color {
  width: 80px;
  height: 80px;
  border: none;
  border-radius: 15px;
  cursor: pointer;
  opacity: 0.9;
  transition: opacity 0.2s;
}

.color:hover {
  opacity: 1;
}

.red { background: #e74c3c; }
.green { background: #2ecc71; }
.blue { background: #3498db; }
.yellow { background: #f1c40f; }

.controls {
  margin-top: 15px;
}

button {
  background: #3498db;
  color: white;
  border: none;
  padding: 10px 15px;
  font-size: 14px;
  border-radius: 8px;
  cursor: pointer;
}

button:hover {
  background: #2980b9;
}

#sequence {
  margin-top: 25px;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
}

.seq-box {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  border: 2px solid white;
}