/* ===================================
   全栈WEB开发技术知识库 - 全局样式
   深色极客主题
   =================================== */

:root {
  --bg-primary: #1e1e2e;
  --bg-secondary: #252538;
  --bg-card: #2a2a3e;
  --bg-code: #1a1a2e;
  --accent: #00d4ff;
  --accent-hover: #00a8cc;
  --text-primary: #e0e0e0;
  --text-secondary: #a0a0b0;
  --text-muted: #707080;
  --border-color: #3a3a50;
  --success: #4caf50;
  --warning: #ff9800;
  --danger: #f44336;
  --info: #2196f3;
}

/* 明亮模式 */
:root.light-mode {
  --bg-primary: #f5f5f5;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-code: #f0f0f0;
  --accent: #0066cc;
  --accent-hover: #0052a3;
  --text-primary: #333333;
  --text-secondary: #666666;
  --text-muted: #999999;
  --border-color: #e0e0e0;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.3s;
}

a:hover {
  color: var(--accent-hover);
}

/* ===================================
   导航栏
   =================================== */

.navbar {
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 0.6rem 0;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.navbar-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

.nav-links {
  display: flex;
  gap: 1.2rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-primary);
  font-weight: 500;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
}

/* 主题切换按钮 */
.theme-toggle {
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.3rem;
  cursor: pointer;
  padding: 0.3rem;
  border-radius: 50%;
  transition: all 0.3s;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
}

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

/* ===================================
   容器和通用布局
   =================================== */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.6rem 20px;
}

/* ===================================
   Hero区域样式
   =================================== */

.hero-section {
  position: relative;
  z-index: 1;
  padding: 3rem 20px;
  text-align: center;
}

.hero-content {
  max-width: 900px;
  margin: 0 auto;
}

.hero-title {
  font-size: 2.5rem;
  font-weight: bold;
  color: var(--text-primary);
  margin-bottom: 1rem;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.hero-stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1rem 1.5rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  min-width: 120px;
}

.hero-stat-number {
  font-size: 2rem;
  font-weight: bold;
  color: var(--accent);
  margin-bottom: 0.3rem;
}

.hero-stat-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-btn {
  padding: 0.9rem 2rem;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.3s;
  display: inline-block;
}

.hero-btn-primary {
  background-color: var(--accent);
  color: var(--bg-primary);
  border: 2px solid var(--accent);
}

.hero-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 212, 255, 0.4);
}

.hero-btn-secondary {
  background-color: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
}

.hero-btn-secondary:hover {
  background-color: var(--accent);
  color: var(--bg-primary);
  transform: translateY(-2px);
}

/* 首页网格布局 */
.homepage-grid {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 1.5rem;
  align-items: stretch;
}

.homepage-section {
  min-width: 0;
  display: flex;
  flex-direction: column;
}

/* ===================================
   Hero区域
   =================================== */

/* Hero区域 - 已删除 */

/* ===================================
   动态背景
   =================================== */

#dynamic-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
}

/* ===================================
   技能墙 (Grid布局)
   =================================== */

.skill-wall {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin: 0;
  flex: 1;
}

.skill-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 1.2rem;
  transition: transform 0.3s, box-shadow 0.3s;
  cursor: pointer;
}

.skill-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0, 212, 255, 0.2);
}

.skill-card h3 {
  color: var(--accent);
  margin-bottom: 0.5rem;
  font-size: 1.2rem;
}

.skill-card p {
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}

/* ===================================
   学习路线
   =================================== */

.learning-paths {
  margin: 0.8rem 0;
}

.learning-paths h2 {
  margin-bottom: 0.8rem;
  text-align: center;
  font-size: 1.3rem;
}

.path-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.path-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 1.2rem;
}

.path-card h3 {
  color: var(--accent);
  margin-bottom: 0.8rem;
  font-size: 1.1rem;
}

.path-steps {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.path-step {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.6rem;
  background-color: var(--bg-secondary);
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s;
}

.path-step:hover {
  background-color: var(--bg-card);
  border: 1px solid var(--accent);
  transform: translateX(4px);
}

.path-step:hover h4 {
  color: var(--accent);
}

.step-number {
  width: 32px;
  height: 32px;
  background-color: var(--accent);
  color: var(--bg-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  flex-shrink: 0;
  font-size: 0.9rem;
}

.step-content h4 {
  margin-bottom: 0.25rem;
}

.step-content p {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* ===================================
   标签云
   =================================== */

/* ===================================
   标签云 - 知识图谱样式
   =================================== */

.tag-cloud {
  margin: 0.8rem 0;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.tag-cloud h2 {
  margin-bottom: 0.8rem;
  font-size: 1.3rem;
  text-align: center;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.tag {
  display: inline-block;
  padding: 0.4rem 0.8rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  color: var(--text-secondary);
  font-size: 0.85rem;
  transition: all 0.3s;
  cursor: pointer;
}

.tag:hover {
  background-color: var(--accent);
  color: var(--bg-primary);
  border-color: var(--accent);
}

/* ===================================
   面包屑导航
   =================================== */

.breadcrumb {
  margin-bottom: 0.6rem;
  padding: 0.5rem;
  background-color: var(--bg-card);
  border-radius: 4px;
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  gap: 0.5rem;
}

.breadcrumb-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
}

.breadcrumb-item:not(:last-child)::after {
  content: '›';
  color: var(--text-muted);
}

.breadcrumb-item.active {
  color: var(--accent);
  font-weight: 500;
}

/* ===================================
   列表页布局
   =================================== */

.list-page {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 0.8rem;
}

/* ===================================
   侧边栏筛选器
   =================================== */

.sidebar {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 0.8rem;
  height: fit-content;
  position: sticky;
  top: 50px;
}

.filter-section {
  margin-bottom: 0.8rem;
}

.filter-section:last-child {
  margin-bottom: 0;
}

.filter-section h3 {
  margin-bottom: 0.6rem;
  color: var(--accent);
  font-size: 1rem;
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

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

.filter-item input[type="checkbox"],
.filter-item input[type="radio"] {
  cursor: pointer;
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
}

.filter-item label {
  cursor: pointer;
  color: var(--text-secondary);
}

.filter-item input:checked + label {
  color: var(--accent);
  font-weight: 500;
}

/* ===================================
   文章卡片
   =================================== */

.article-list {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.article-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 1rem;
  transition: all 0.3s;
  cursor: pointer;
  position: relative;
}

.article-card:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 12px rgba(0, 212, 255, 0.15);
  transform: translateY(-2px);
}

.article-card:hover h3 a {
  color: var(--accent);
}

.article-card h3 {
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
}

.article-card h3 a {
  color: var(--text-primary);
}

.article-card h3 a:hover {
  color: var(--accent);
}

.article-meta {
  display: flex;
  gap: 0.8rem;
  margin-bottom: 0.5rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.article-summary {
  color: var(--text-secondary);
  margin-bottom: 0.6rem;
  line-height: 1.5;
  font-size: 0.9rem;
}

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

.article-tag {
  padding: 0.25rem 0.75rem;
  background-color: var(--bg-secondary);
  border-radius: 15px;
  font-size: 0.75rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
}

.article-tag:hover {
  background-color: var(--accent);
  color: var(--bg-primary);
}

.difficulty-badge {
  display: inline-block;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: bold;
}

.difficulty-1,
.difficulty-2 {
  background-color: var(--success);
  color: white;
}

.difficulty-3 {
  background-color: var(--warning);
  color: white;
}

.difficulty-4,
.difficulty-5 {
  background-color: var(--danger);
  color: white;
}

/* ===================================
   分页
   =================================== */

.pagination {
  display: flex;
  justify-content: center;
  gap: 0.4rem;
  margin-top: 0.8rem;
}

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

.pagination button:hover:not(:disabled) {
  background-color: var(--accent);
  border-color: var(--accent);
  color: var(--bg-primary);
}

.pagination button.active {
  background-color: var(--accent);
  border-color: var(--accent);
  color: var(--bg-primary);
  font-weight: bold;
}

.pagination button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ===================================
   详情页
   =================================== */

.detail-header {
  margin-bottom: 0.8rem;
}

.detail-header h1 {
  font-size: 1.8rem;
  margin-bottom: 0.6rem;
  color: var(--accent);
}

.detail-meta {
  display: flex;
  gap: 1rem;
  margin-bottom: 0.6rem;
  flex-wrap: wrap;
  font-size: 0.9rem;
}

.detail-content {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 1rem;
  margin-bottom: 0.8rem;
}

.detail-content h2 {
  margin: 1.2rem 0 0.6rem;
  color: var(--accent);
  font-size: 1.3rem;
}

.detail-content h2:first-child {
  margin-top: 0;
}

.detail-content p {
  margin-bottom: 0.6rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.detail-content ul,
.detail-content ol {
  margin-bottom: 1rem;
  padding-left: 2rem;
  color: var(--text-secondary);
}

.detail-content li {
  margin-bottom: 0.5rem;
}

.detail-content code {
  background-color: var(--bg-code);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-family: 'Courier New', monospace;
  font-size: 0.9em;
}

/* ===================================
   代码示例区域
   =================================== */

.code-section {
  margin: 0.8rem 0;
}

.code-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0;
}

.code-tab {
  padding: 0.5rem 1rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-bottom: none;
  border-radius: 4px 4px 0 0;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.3s;
  font-size: 0.9rem;
}

.code-tab:hover {
  background-color: var(--bg-card);
  color: var(--text-primary);
}

.code-tab.active {
  background-color: var(--bg-card);
  color: var(--accent);
  font-weight: bold;
  border-color: var(--accent);
}

.code-block-wrapper {
  position: relative;
  background-color: var(--bg-code);
  border: 1px solid var(--border-color);
  border-radius: 0 6px 6px 6px;
  overflow: hidden;
}

.code-block {
  margin: 0;
  padding: 1rem;
  overflow-x: auto;
  background: transparent !important;
  font-size: 0.85rem;
}

.copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  padding: 0.4rem 0.8rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.3s;
  font-size: 0.8rem;
}

.copy-btn:hover {
  background-color: var(--accent);
  color: var(--bg-primary);
  border-color: var(--accent);
}

/* ===================================
   速查手册
   =================================== */

.cheatsheet-tabs {
  display: flex;
  gap: 0.6rem;
  margin-bottom: 0.8rem;
  border-bottom: 2px solid var(--border-color);
}

.cheatsheet-tab {
  padding: 0.6rem 1.2rem;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 500;
  transition: all 0.3s;
  position: relative;
}

.cheatsheet-tab:hover {
  color: var(--text-primary);
}

.cheatsheet-tab.active {
  color: var(--accent);
}

.cheatsheet-tab.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--accent);
}

.command-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.8rem;
}

.command-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 1rem;
  position: relative;
  transition: all 0.3s;
}

.command-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 212, 255, 0.15);
}

.command-text {
  font-family: 'Courier New', monospace;
  background-color: var(--bg-code);
  padding: 0.5rem;
  border-radius: 4px;
  margin-bottom: 0.5rem;
  font-size: 0.85rem;
  color: var(--accent);
  overflow-x: auto;
}

.command-text.color-preview {
  font-size: 1rem;
  padding: 0.8rem;
  text-align: center;
  border: 2px solid;
  border-radius: 6px;
  background-color: var(--bg-card);
  transition: transform 0.2s;
}

.command-text.color-preview:hover {
  transform: scale(1.02);
}

.command-description {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

/* ===================================
   相关推荐
   =================================== */

.related-section {
  margin-top: 1rem;
  padding-top: 0.8rem;
  border-top: 2px solid var(--border-color);
}

.related-section h2 {
  margin-bottom: 1rem;
  color: var(--accent);
  font-size: 1.3rem;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 0.8rem;
}

.related-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 1rem;
  transition: all 0.3s;
}

.related-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.related-card h3 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

.related-card h3 a {
  color: var(--text-primary);
}

.related-card h3 a:hover {
  color: var(--accent);
}

.related-card p {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

/* ===================================
   Toast通知
   =================================== */

.toast {
  position: fixed;
  bottom: 20px;
  right: 20px;
  padding: 0.6rem 1.2rem;
  background-color: var(--success);
  color: white;
  border-radius: 4px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  z-index: 9999;
  animation: slideIn 0.3s ease-out;
  font-size: 0.9rem;
}

@keyframes slideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* ===================================
   页脚
   =================================== */

.footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 0.8rem 0;
  text-align: center;
  color: var(--text-muted);
  margin-top: 1rem;
  font-size: 0.85rem;
}

/* ===================================
   响应式设计
   =================================== */

@media (max-width: 1024px) {
  .list-page {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    margin-bottom: 1rem;
  }

  .path-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .homepage-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .navbar-container {
    flex-direction: column;
    gap: 0.6rem;
  }

  .nav-links {
    gap: 0.8rem;
  }

  .hero-section {
    padding: 2rem 15px;
  }

  .hero-title {
    font-size: 1.8rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .hero-stats {
    gap: 1rem;
  }

  .hero-stat-item {
    padding: 0.8rem 1rem;
    min-width: 100px;
  }

  .hero-stat-number {
    font-size: 1.5rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .hero-btn {
    width: 100%;
    max-width: 300px;
    text-align: center;
  }

  .skill-wall {
    grid-template-columns: 1fr;
  }

  .path-grid {
    grid-template-columns: 1fr;
  }

  .command-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .related-grid {
    grid-template-columns: 1fr;
  }

  .detail-header h1 {
    font-size: 1.5rem;
  }

  .code-tabs {
    flex-wrap: wrap;
  }

  .cheatsheet-tabs {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0.8rem 15px;
  }

  .article-meta {
    flex-direction: column;
    gap: 0.3rem;
  }

  .detail-meta {
    flex-direction: column;
    gap: 0.3rem;
  }

  .pagination {
    flex-wrap: wrap;
  }
}