/* 全屏预览容器 */
.preview-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.preview-overlay.active {
  display: flex;
  opacity: 1;
}

/* 预览图片样式 */
.preview-image {
  max-width: 90%;
  max-height: 90%;
  object-fit: contain;
  transition: transform 0.3s ease;
  transform: scale(0.95);
}

.preview-overlay.active .preview-image {
  transform: scale(1);
}

/* 关闭按钮 */
.close-btn {
  position: absolute;
  top: 20px;
  right: 20px;
  color: white;
  font-size: 36px;
  background: none;
  border: none;
  cursor: pointer;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.close-btn:hover {
  transform: rotate(90deg) scale(1.2);
}

/* 加载指示器 */
.loader {
  width: 50px;
  height: 50px;
  border: 5px solid #f3f3f3;
  border-top: 5px solid #3498db;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  display: none;
}

.preview-overlay.loading .loader {
  display: block;
}

.preview-overlay.loading .preview-image {
  display: none;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}