:root {
  --primary-color: #2ecc71;
  --secondary-color: #3498db;
  --success: #27ae60;
  --warning: #f1c40f;
  --danger: #e74c3c;
  --text-primary: #2c3e50;
  --text-secondary: #7f8c8d;
  --bg-light: #f8f9fa;
  --border-color: #ecf0f1;
  --radius-lg: 12px;
  --radius-md: 8px;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 基础重置 */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* 布局系统 */
.container {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 2rem;
  max-width: 1400px;
  margin: 0 auto;
  padding: 1.5rem;
}

/* 侧边栏优化 */
#sidebar {
  position: sticky;
  top: 2rem;
  height: calc(100vh - 3rem);
  background: rgba(255, 255, 255, 0.98);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(12px);
  display: flex;
  flex-direction: column;
}

#sidebar h2 {
  font-size: 1.25rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

#sidebar-list {
  flex: 1;
  overflow-y: auto;
}

#sidebar-list li a {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  background: var(--bg-light);
  color: var(--text-secondary);
  transition: var(--transition);
}

#sidebar-list li a:hover {
  background: var(--primary-color);
  color: white;
  transform: translateX(4px);
}

/* 主要内容区域 */
#content {
  background: rgba(255, 255, 255, 0.98);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-md);
  min-height: calc(100vh - 3rem);
}

/* 按钮系统 */
button {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--radius-md);
  background: var(--primary-color);
  color: white;
  cursor: pointer;
  transition: var(--transition);
}

button:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

button.secondary {
  background: var(--secondary-color);
}

button.danger {
  background: var(--danger);
}

/* 同步面板 */
.sync-panel {
  background: var(--bg-light);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.sync-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.sync-status-indicator {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--warning);
  box-shadow: 0 0 8px var(--warning);
}

.sync-status-indicator.synced {
  background: var(--success);
}

/* 表情包分类 */
.category {
  background: white;
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.3s ease;
}

.category:hover {
  box-shadow: var(--shadow-md);
}

.emoji-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.emoji-item {
  aspect-ratio: 1/1;
  background-size: cover;
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
  transition: var(--transition);
}

.emoji-item:hover {
  transform: scale(1.03);
}

/* 上传区块 */
.upload-emoji {
  border: 2px dashed var(--border-color);
  background: rgba(255, 255, 255, 0.9);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  transition: var(--transition);
}

.upload-emoji:hover {
  border-color: var(--primary-color);
  background: rgba(46, 204, 113, 0.05);
}

/* 表单元素 */
input[type="text"],
input[type="file"] {
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  width: 100%;
  transition: var(--transition);
}

input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(46, 204, 113, 0.25);
}

/* 删除按钮 */
.delete-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 24px;
  height: 24px;
  background: var(--danger);
  display: none;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: white;
}

.emoji-item:hover .delete-btn {
  display: flex;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .container {
    grid-template-columns: 1fr;
    padding: 1rem;
  }

  #sidebar {
    position: static;
    height: auto;
  }

  .emoji-list {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* 动画效果 */
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.fa-spinner {
  animation: spin 1s linear infinite;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.category {
  animation: fadeIn 0.4s ease forwards;
}

.container {
  display: flex;
}

/* 侧边栏 */
#sidebar {
  width: 200px;
  position: sticky;
  top: 0;
  height: 100vh;
  background-color: rgba(255, 255, 255, 0.8);
  border-right: 1px solid rgba(0, 0, 0, 0.1);
  padding: 20px;
  overflow-y: auto;
  border-radius: 12px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* 目录标题样式 */
#sidebar h2 {
  font-size: 18px;
  margin-top: 0;
  color: #495057;
}

/* 目录列表样式 */
#sidebar-list {
  list-style-type: none;
  padding: 0;
  margin: 0;
}

/* 目录项目的样式 */
#sidebar-list li {
  margin: 10px 0;
}

#sidebar-list li a {
  display: block;
  padding: 10px;
  background: rgba(255, 255, 255, 0.6);
  border-radius: 12px;
  color: #495057;
  text-decoration: none;
  transition: background-color 0.3s ease, transform 0.3s ease;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

#sidebar-list li a:hover {
  background-color: rgba(76, 175, 80, 0.2);
  transform: scale(1.05);
  color: #4caf50;
}

#sidebar-list a {
  text-decoration: none;
  color: #333;
  transition: color 0.3s ease;
}

#sidebar-list a:hover {
  color: #4caf50;
}

/* 主要内容区域 */
#content {
  flex: 1;
  padding: 20px;
  background: rgba(255, 255, 255, 0.8);
  border-radius: 12px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* 页面背景和文字样式 */
body {
  font-family: Arial, sans-serif;
  background: linear-gradient(45deg, #f8f9fa 0%, #e9ecef 100%);
  margin: 0;
  padding: 20px;
}

h1 {
  text-align: center;
  color: #333;
}

button {
  padding: 10px 20px;
  background-color: #4caf50;
  color: white;
  border: none;
  cursor: pointer;
  margin: 10px;
  border-radius: 4px;
  transition: background-color 0.3s ease;
}

button:hover {
  background-color: #45a049;
}

#emoji-categories {
  margin-top: 20px;
}

.category {
  margin-bottom: 30px;
  padding: 20px;
  background-color: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.category h3 {
  margin: 0;
  font-size: 1.2em;
  color: #333;
}

.category-description {
  margin: 0;
  color: #666;
  font-size: 0.9em;
  line-height: 1.4;
  margin-bottom: 10px;
}

.emoji-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.emoji-item {
  width: 120px;
  height: 120px;
  background-size: cover;
  background-position: center;
  border: 1px solid #ccc;
  cursor: pointer;
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.emoji-item:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.delete-btn {
  display: none;
  position: absolute;
  top: -8px;
  right: -8px;
  background-color: rgba(255, 0, 0, 0.9);
  color: white;
  border: none;
  border-radius: 50%;
  width: 20px;
  height: 20px;
  font-size: 16px;
  cursor: pointer;
  transition: all 0.3s ease;
  align-items: center;
  justify-content: center;
  line-height: 1;
  flex-shrink: 0;
  box-sizing: border-box;
  padding: 0;
  box-shadow: 0 0 4px rgba(0, 0, 0, 0.2);
}

.emoji-item:hover .delete-btn {
  display: flex;
}

.delete-btn:hover {
  background-color: #ff4444;
  transform: scale(1.1);
}

/* 上传块样式 */
.upload-emoji {
  width: 120px;
  height: 120px;
  border: 2px dashed #ccc;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  background-color: #fafafa;
  color: #888;
  font-size: 12px;
  position: relative;
  border-radius: 8px;
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.upload-emoji.dragover {
  border-color: #4caf50;
  background-color: #e8f5e9;
}

input[type="text"],
input[type="file"] {
  padding: 10px;
  margin: 10px;
  width: 100%;
  max-width: 300px;
}

#add-category-form {
  margin: 10px 0;
}

#add-category-form input {
  margin-right: 10px;
}

.login-container {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  margin-bottom: 20px;
  padding: 15px;
  border: 1px solid rgba(255, 255, 255, 0.6);
  background: rgba(255, 255, 255, 0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-radius: 12px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.login-title {
  text-align: center;
}

.login-input {
  margin-bottom: 20px;
  padding: 15px;
  border: 1px solid rgba(255, 255, 255, 0.6);
  background: rgba(255, 255, 255, 0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-radius: 12px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.login-box {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.delete-category-btn {
  background-color: #e74c3c;
  color: white;
  border: none;
  border-radius: 4px;
  padding: 5px 10px;
  cursor: pointer;
  font-size: 12px;
  transition: background-color 0.3s ease;
}

.delete-category-btn:hover {
  background-color: #c0392b;
}

/* 添加同步面板样式 */
.sync-panel {
  margin-top: 20px;
  padding: 15px;
  background: rgba(255, 255, 255, 0.6);
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.sync-panel h3,
.sync-panel h4 {
  margin: 0 0 15px;
  color: #333;
}

.sync-panel h4 {
  margin-top: 15px;
}

.sync-control-buttons {
  margin-bottom: 15px;
}

.sync-buttons {
  display: flex;
  gap: 10px;
}

.sync-divider {
  margin: 20px 0;
  border: none;
  border-top: 1px solid #dee2e6;
}

#sync-status {
  margin-top: 10px;
  padding: 10px;
  background: #f8f9fa;
  border-radius: 4px;
}

#sync-status p {
  margin: 5px 0;
  color: #666;
}

.sync-buttons button {
  width: 100%;
  padding: 8px;
  font-size: 14px;
  margin: 0;
}

#check-sync-btn {
  background-color: #007bff;
}

#check-sync-btn:hover {
  background-color: #0056b3;
}

#upload-sync-btn {
  background-color: #28a745;
}

#upload-sync-btn:hover {
  background-color: #218838;
}

#download-sync-btn {
  background-color: #17a2b8;
}

#download-sync-btn:hover {
  background-color: #138496;
}

/* 添加同步状态指示器 */
.sync-status-indicator {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 5px;
}

.sync-status-pending {
  background-color: #ffc107;
}

.sync-status-synced {
  background-color: #28a745;
}

.mapping-input {
  display: flex;
  gap: 10px;
  margin: 10px 0;
  padding: 10px;
  background-color: #fff3cd;
  border-radius: 4px;
}

.mapping-input input {
  flex: 1;
  padding: 5px;
  border: 1px solid #ddd;
  border-radius: 4px;
}

.mapping-input button {
  padding: 5px 10px;
  background-color: #28a745;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

.mapping-input button:hover {
  background-color: #218838;
}

.category-title-container {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.edit-category-btn {
  padding: 4px 8px;
  font-size: 0.9em;
  background-color: #4caf50;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

.edit-category-btn:hover {
  background-color: #45a049;
}

.edit-category-container {
  display: flex;
  gap: 10px;
  margin-left: 10px;
}

.edit-category-container input {
  padding: 5px;
  border: 1px solid #ddd;
  border-radius: 4px;
}

.edit-category-container button {
  padding: 5px 10px;
  background-color: #2196f3;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

.edit-category-container button:hover {
  background-color: #1976d2;
}

/* 添加或修改以下样式 */
.left-panel {
  width: 250px;
  padding: 20px;
  background-color: #f5f5f5;
  border-right: 1px solid #ddd;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.sync-panel {
  background-color: white;
  padding: 15px;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.sync-panel h3 {
  margin-top: 0;
  margin-bottom: 15px;
  color: #333;
}

#sync-status {
  margin-bottom: 15px;
  padding: 10px;
  background-color: #f8f9fa;
  border-radius: 4px;
  font-size: 14px;
}

.sync-buttons {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sync-buttons button {
  padding: 8px 12px;
  border: 1px solid #ddd;
  border-radius: 4px;
  background-color: #fff;
  cursor: pointer;
  transition: background-color 0.2s;
}

.sync-buttons button:hover {
  background-color: #f0f0f0;
}

#sidebar {
  background-color: white;
  padding: 15px;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

#sidebar h2 {
  margin-top: 0;
  margin-bottom: 15px;
  color: #333;
}

#sidebar-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

#sidebar-list li {
  margin-bottom: 10px;
}

#sidebar-list a {
  text-decoration: none;
  color: #333;
  display: block;
  padding: 8px;
  border-radius: 4px;
  transition: background-color 0.2s;
}

#sidebar-list a:hover {
  background-color: #f0f0f0;
}

.status-section {
  margin: 15px 0;
  padding: 10px;
  background: #f8f9fa;
  border-radius: 4px;
}

.status-section h4 {
  margin: 0 0 10px;
  color: #495057;
}

.status-section ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.status-section li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 5px 0;
}

.action-buttons {
  display: flex;
  gap: 5px;
}

.sync-btn,
.restore-btn,
.remove-btn {
  padding: 4px 8px;
  font-size: 12px;
  border-radius: 4px;
  cursor: pointer;
}

.sync-btn {
  background-color: #28a745;
  color: white;
}

.restore-btn {
  background-color: #17a2b8;
  color: white;
}

.remove-btn {
  background-color: #dc3545;
  color: white;
}

.main-sync-btn {
  width: 100%;
  margin-top: 15px;
  padding: 8px;
  background-color: #007bff;
  color: white;
}

.retry-btn {
  background-color: #6c757d;
  color: white;
}

.category-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.category-actions {
  display: flex;
  gap: 8px;
}

.category-edit-form {
  margin: 10px 0;
  padding: 10px;
  background: #f8f9fa;
  border-radius: 4px;
}

.category-edit-form input {
  display: block;
  width: 100%;
  margin-bottom: 8px;
  padding: 6px;
  border: 1px solid #ddd;
  border-radius: 4px;
}

.edit-buttons {
  display: flex;
  gap: 8px;
}

.save-edit-btn,
.cancel-edit-btn {
  padding: 4px 12px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

.save-edit-btn {
  background-color: #28a745;
  color: white;
}

.cancel-edit-btn {
  background-color: #6c757d;
  color: white;
}

.edit-category-btn {
  background-color: #17a2b8;
  color: white;
  border: none;
  border-radius: 4px;
  padding: 4px 8px;
  cursor: pointer;
}