/* 基础样式 */
:root {
  --bg-primary: #0f0f23;
  --bg-secondary: #1a1a2e;
  --bg-tertiary: #16213e;
  --text-primary: #e2e8f0;
  --text-secondary: #a0aec0;
  --accent: #4fd1c7;
  --accent-hover: #38b2ac;
  --border: #2d3748;
  --success: #48bb78;
  --warning: #ed8936;
  --danger: #f56565;
}

[data-theme="light"] {
  --bg-primary: #f7fafc;
  --bg-secondary: #edf2f7;
  --bg-tertiary: #e2e8f0;
  --text-primary: #2d3748;
  --text-secondary: #4a5568;
  --accent: #4fd1c7;
  --accent-hover: #38b2ac;
  --border: #cbd5e0;
}

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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color 0.3s, color 0.3s;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 头部样式 */
.header {
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--accent);
}

.nav {
  display: flex;
  gap: 1.5rem;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  transition: all 0.3s;
}

.nav-link:hover, .nav-link.active {
  color: var(--accent);
  background-color: var(--bg-tertiary);
}

.theme-toggle {
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 50%;
  transition: background-color 0.3s;
}

.theme-toggle:hover {
  background-color: var(--bg-tertiary);
}

/* 主内容区域 */
.main-content {
  padding: 2rem 0;
  min-height: calc(100vh - 80px);
}

.page {
  display: none;
}

.page.active {
  display: block;
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.search-box {
  display: flex;
  gap: 0.5rem;
}

.search-box input {
  padding: 0.5rem 1rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  width: 250px;
}

.search-box button {
  padding: 0.5rem 1rem;
  background-color: var(--accent);
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.3s;
}

.search-box button:hover {
  background-color: var(--accent-hover);
}

/* 文章网格 */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.article-card {
  background-color: var(--bg-secondary);
  border-radius: 8px;
  padding: 1.5rem;
  transition: transform 0.3s, box-shadow 0.3s;
  cursor: pointer;
  border: 1px solid var(--border);
}

.article-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.article-card h3 {
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.article-card p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  font-size: 0.875rem;
}

.category-badge {
  background-color: var(--accent);
  color: white;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
}

.tags-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
}

.tag {
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  padding: 0.125rem 0.5rem;
  border-radius: 12px;
  font-size: 0.75rem;
}

.article-date {
  color: var(--text-secondary);
  margin-left: auto;
}

/* 文章详情页 */
.article-header {
  margin-bottom: 2rem;
}

.back-btn {
  background: none;
  border: none;
  color: var(--accent);
  cursor: pointer;
  margin-bottom: 1rem;
  font-size: 1rem;
}

.back-btn:hover {
  text-decoration: underline;
}

.article-content {
  background-color: var(--bg-secondary);
  border-radius: 8px;
  padding: 2rem;
  line-height: 1.8;
}

.article-content h1, .article-content h2, .article-content h3 {
  margin: 1.5rem 0 1rem 0;
  color: var(--accent);
}

.article-content p {
  margin-bottom: 1rem;
}

.article-content ul, .article-content ol {
  margin-left: 1.5rem;
  margin-bottom: 1rem;
}

.article-content code {
  background-color: var(--bg-tertiary);
  padding: 0.125rem 0.25rem;
  border-radius: 4px;
  font-family: 'Courier New', monospace;
}

.article-content pre {
  background-color: var(--bg-tertiary);
  padding: 1rem;
  border-radius: 8px;
  overflow-x: auto;
  margin-bottom: 1rem;
}

/* 分类和标签页面 */
.categories-container, .tags-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1rem;
}

.category-card, .tag-card {
  background-color: var(--bg-secondary);
  border-radius: 8px;
  padding: 1.5rem;
  text-align: center;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: transform 0.3s;
}

.category-card:hover, .tag-card:hover {
  transform: scale(1.05);
}

.category-card h3, .tag-card h3 {
  margin-bottom: 0.5rem;
  color: var(--accent);
}

.count {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* 登录表单 */
.login-form {
  max-width: 400px;
  margin: 0 auto;
  background-color: var(--bg-secondary);
  padding: 2rem;
  border-radius: 8px;
  text-align: center;
}

.login-form h2 {
  margin-bottom: 1.5rem;
  color: var(--accent);
}

.login-form input {
  width: 100%;
  padding: 0.75rem;
  margin-bottom: 1rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.login-form button {
  width: 100%;
  padding: 0.75rem;
  background-color: var(--accent);
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.3s;
}

.login-form button:hover {
  background-color: var(--accent-hover);
}

/* 管理后台 */
.admin-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.admin-actions {
  display: flex;
  gap: 0.5rem;
}

.admin-actions button {
  padding: 0.5rem 1rem;
  border: 1px solid var(--border);
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.3s;
}

.admin-actions button:hover {
  background-color: var(--bg-tertiary);
}

.admin-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.5rem;
}

.tab-btn {
  padding: 0.75rem 1.5rem;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.3s;
}

.tab-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
}

.toolbar {
  margin-bottom: 1rem;
}

.toolbar button {
  padding: 0.5rem 1rem;
  background-color: var(--accent);
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.3s;
}

.toolbar button:hover {
  background-color: var(--accent-hover);
}

.admin-articles-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.article-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  background-color: var(--bg-secondary);
  border-radius: 4px;
  border: 1px solid var(--border);
}

.article-item .title {
  flex: 1;
  font-weight: bold;
}

.article-item .status {
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  margin: 0 1rem;
}

.status.published {
  background-color: var(--success);
  color: white;
}

.status.draft {
  background-color: var(--warning);
  color: white;
}

.article-actions {
  display: flex;
  gap: 0.5rem;
}

.article-actions button {
  padding: 0.25rem 0.5rem;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.75rem;
}

.edit-btn {
  background-color: var(--accent);
  color: white;
}

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

/* 分类和标签编辑器 */
.categories-editor, .tags-editor {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.category-item, .tag-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background-color: var(--bg-secondary);
  border-radius: 4px;
  border: 1px solid var(--border);
}

.category-item input, .tag-item input {
  flex: 1;
  padding: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.delete-category-btn, .delete-tag-btn {
  background-color: var(--danger);
  color: white;
  border: none;
  border-radius: 4px;
  padding: 0.5rem;
  cursor: pointer;
}

/* 模态框 */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

.modal.active {
  display: flex;
}

.modal-content {
  background-color: var(--bg-secondary);
  border-radius: 8px;
  width: 90%;
  max-width: 700px;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.modal-header h3 {
  color: var(--accent);
}

.close-btn {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-secondary);
  cursor: pointer;
}

.modal-body {
  padding: 1.5rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.form-group input, .form-group select, .form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.form-group textarea {
  resize: vertical;
  min-height: 200px;
  font-family: inherit;
}

.form-group select[multiple] {
  height: 120px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
}

.checkbox-label input {
  width: auto;
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 1rem;
  margin-top: 1.5rem;
}

.form-actions button {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.3s;
}

#cancel-article-btn {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

#save-article-btn {
  background-color: var(--accent);
  color: white;
}

#save-article-btn:hover {
  background-color: var(--accent-hover);
}

/* 响应式设计 */
@media (max-width: 768px) {
  .header-content {
    flex-direction: column;
    gap: 1rem;
  }
  
  .nav {
    width: 100%;
    justify-content: center;
  }
  
  .page-header {
    flex-direction: column;
    gap: 1rem;
    align-items: flex-start;
  }
  
  .search-box {
    width: 100%;
  }
  
  .search-box input {
    width: 100%;
  }
  
  .articles-grid {
    grid-template-columns: 1fr;
  }
  
  .admin-header {
    flex-direction: column;
    gap: 1rem;
    align-items: flex-start;
  }
  
  .admin-actions {
    width: 100%;
    justify-content: space-between;
  }
  
  .article-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
  
  .article-item .title {
    width: 100%;
  }
  
  .article-actions {
    width: 100%;
    justify-content: flex-end;
  }
}

/* 加载动画 */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255,255,255,.3);
  border-radius: 50%;
  border-top-color: var(--accent);
  animation: spin 1s ease-in-out infinite;
}

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

.hidden {
  display: none !important;
}