body {
  background-color: white;
  margin: 0;
  font-family: 'SF Distant Galaxy', sans-serif;
  overflow: hidden;
}

#heading {
  position: fixed;
  width: 100%;
  padding: 32px;
  text-align: center;
  z-index: 100;
}

.border {
  background: linear-gradient(90deg, gray, 90%, white);
  height: 2px;
  width: 80vw;
  margin: 4px auto 0;
}

h1 {
  color: #111;
  font-size: 3em;
  margin: 0;
  font-weight: 300;
}

/* Control Panel */
#controls {
  position: fixed;
  top: 150px;
  right: 32px;
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: rgba(255, 255, 255, 0.95);
  padding: 20px;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.control-label {
  font-size: 14px;
  font-weight: 600;
  color: #333;
  margin-bottom: 8px;
  text-align: center;
}

.level-button {
  padding: 14px 20px;
  font-size: 16px;
  font-family: 'SF Distant Galaxy', sans-serif;
  font-weight: 600;
  color: #333;
  background: linear-gradient(135deg, #f5f5f5 0%, #e0e0e0 100%);
  border: 2px solid #ccc;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
  text-align: center;
  min-width: 120px;
}

.level-button span {
  font-size: 12px;
  font-weight: 400;
  color: #666;
}

.level-button:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
  border-color: #667eea;
}

.level-button:active:not(:disabled) {
  transform: translateY(0);
}

.level-button.active {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border-color: #667eea;
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.level-button.active span {
  color: rgba(255, 255, 255, 0.9);
}

.level-button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* Responsive */
@media (max-width: 768px) {
  #controls {
    top: 120px;
    right: 16px;
    padding: 16px;
  }
  
  .level-button {
    padding: 12px 16px;
    font-size: 14px;
    min-width: 100px;
  }
  
  h1 {
    font-size: 2em;
  }
}