* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #4f46e5;
  --primary-hover: #4338ca;
  --success-color: #10b981;
  --danger-color: #ef4444;
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --bg-primary: #ffffff;
  --bg-secondary: #f9fafb;
  --border-color: #e5e7eb;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --radius: 12px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  padding: 20px;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  background: var(--bg-primary);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

/* 头部 */
header {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
  color: white;
  padding: 40px 30px;
  text-align: center;
}

header h1 {
  font-size: 2.5rem;
  margin-bottom: 10px;
  font-weight: 700;
}

.subtitle {
  font-size: 1.1rem;
  opacity: 0.95;
}

/* 主内容 */
main {
  padding: 40px 30px;
}

/* 上传区域 */
.upload-section {
  margin-bottom: 50px;
}

.upload-area {
  border: 3px dashed var(--border-color);
  border-radius: var(--radius);
  padding: 60px 20px;
  text-align: center;
  background: var(--bg-secondary);
  transition: all 0.3s ease;
  cursor: pointer;
}

.upload-area:hover,
.upload-area.drag-over {
  border-color: var(--primary-color);
  background: rgba(79, 70, 229, 0.05);
  transform: translateY(-2px);
}

.upload-icon {
  font-size: 4rem;
  margin-bottom: 20px;
}

.upload-text {
  font-size: 1.3rem;
  color: var(--text-primary);
  margin-bottom: 10px;
  font-weight: 500;
}

.upload-hint {
  color: var(--text-secondary);
  margin-bottom: 25px;
  font-size: 0.95rem;
}

.upload-btn {
  background: var(--primary-color);
  color: white;
  border: none;
  padding: 14px 40px;
  font-size: 1rem;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.3s ease;
  font-weight: 600;
}

.upload-btn:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* 上传进度 */
.upload-progress {
  margin-top: 20px;
}

.progress-bar {
  width: 100%;
  height: 8px;
  background: var(--bg-secondary);
  border-radius: 10px;
  overflow: hidden;
  margin-bottom: 10px;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-color), var(--success-color));
  border-radius: 10px;
  transition: width 0.3s ease;
  width: 0%;
}

.progress-text {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* 图片管理区域 */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 25px;
}

.section-header h2 {
  font-size: 1.8rem;
  color: var(--text-primary);
}

.refresh-btn {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 10px 20px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 0.95rem;
}

.refresh-btn:hover {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

/* 图片网格 */
.images-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 25px;
  margin-bottom: 30px;
}

.image-card {
  background: white;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-sm);
}

.image-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.image-preview {
  width: 100%;
  height: 200px;
  object-fit: cover;
  cursor: pointer;
  background: var(--bg-secondary);
}

.image-info {
  padding: 15px;
}

.image-name {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 10px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.image-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 15px;
}

.image-actions {
  display: flex;
  gap: 10px;
}

.btn {
  flex: 1;
  padding: 8px 16px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.3s ease;
  font-weight: 500;
}

.btn-copy {
  background: var(--primary-color);
  color: white;
}

.btn-copy:hover {
  background: var(--primary-hover);
}

.btn-delete {
  background: var(--danger-color);
  color: white;
}

.btn-delete:hover {
  background: #dc2626;
}

/* 空状态 */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
  display: none;
}

.empty-state.show {
  display: block;
}

.empty-icon {
  font-size: 5rem;
  margin-bottom: 20px;
  opacity: 0.5;
}

/* 模态框 */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(5px);
}

.modal.show {
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal-content {
  background: white;
  padding: 30px;
  border-radius: var(--radius);
  max-width: 90%;
  max-height: 90%;
  position: relative;
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from {
    transform: translateY(50px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.close-btn {
  position: absolute;
  right: 20px;
  top: 20px;
  font-size: 2rem;
  cursor: pointer;
  color: var(--text-secondary);
  transition: color 0.3s ease;
}

.close-btn:hover {
  color: var(--danger-color);
}

#modalImage {
  max-width: 800px;
  max-height: 600px;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  margin-bottom: 20px;
}

.modal-actions {
  display: flex;
  gap: 10px;
}

#modalImageUrl {
  flex: 1;
  padding: 12px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 0.9rem;
}

.copy-btn {
  padding: 12px 30px;
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  transition: all 0.3s ease;
}

.copy-btn:hover {
  background: var(--primary-hover);
}

/* 页脚 */
footer {
  background: var(--bg-secondary);
  padding: 20px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
  border-top: 1px solid var(--border-color);
}

/* 通知样式 */
.notification {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: 15px 25px;
  background: white;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  z-index: 2000;
  animation: slideInRight 0.3s ease;
  max-width: 350px;
}

@keyframes slideInRight {
  from {
    transform: translateX(400px);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

.notification.success {
  border-left: 4px solid var(--success-color);
}

.notification.error {
  border-left: 4px solid var(--danger-color);
}

/* 响应式设计 */
@media (max-width: 768px) {
  body {
    padding: 10px;
  }

  header {
    padding: 30px 20px;
  }

  header h1 {
    font-size: 2rem;
  }

  main {
    padding: 25px 15px;
  }

  .images-grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 15px;
  }

  .modal-content {
    padding: 20px;
  }

  #modalImage {
    max-width: 100%;
  }

  .modal-actions {
    flex-direction: column;
  }
}