/* 加载动画样式 */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--background-color, #ffffff);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading-spinner {
  width: 50px;
  height: 50px;
  border: 5px solid rgba(0, 0, 0, 0.1);
  border-radius: 50%;
  border-top-color: var(--accent-color, #ff6b6b);
  animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* 暗色模式下的加载动画 */
.dark-mode .loading-overlay {
  background-color: var(--background-color, #1a1a1a);
}

.dark-mode .loading-spinner {
  border: 5px solid rgba(255, 255, 255, 0.1);
  border-top-color: var(--accent-color, #ff6b6b);
}