body {
  margin: 0;
  overflow: hidden;
  background-color: #000;
  font-family: 'Arial', sans-serif;
}

canvas {
  display: block;
}

/* 控制按钮样式 */
.controls {
  position: fixed;
  top: 20px;
  left: 20px;
  z-index: 1000;
  display: flex;
  gap: 10px;
}

.control-btn {
  padding: 12px 24px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border: none;
  border-radius: 25px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.control-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(102, 126, 234, 0.5);
  background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
}

.control-btn:active {
  transform: translateY(0);
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.control-btn:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.4);
}

/* 按钮特定样式 */
#serveButton {
  background: linear-gradient(135deg, #ff6b6b 0%, #ee5a24 100%);
  box-shadow: 0 4px 15px rgba(255, 107, 107, 0.3);
}

#serveButton:hover {
  background: linear-gradient(135deg, #ee5a24 0%, #ff6b6b 100%);
  box-shadow: 0 8px 25px rgba(255, 107, 107, 0.5);
}

#dropButton {
  background: linear-gradient(135deg, #4ecdc4 0%, #44a08d 100%);
  box-shadow: 0 4px 15px rgba(78, 205, 196, 0.3);
}

#dropButton:hover {
  background: linear-gradient(135deg, #44a08d 0%, #4ecdc4 100%);
  box-shadow: 0 8px 25px rgba(78, 205, 196, 0.5);
}