/* =====================================================
   EDGP Blog - 现代技术博客样式
   ===================================================== */

/* CSS变量 - 便于主题定制 */

/* 深色主题（默认） */
:root,
[data-theme="dark"] {
  /* 颜色 */
  --color-bg: #0d1117;
  --color-bg-secondary: #161b22;
  --color-bg-tertiary: #21262d;
  --color-text: #c9d1d9;
  --color-text-secondary: #8b949e;
  --color-text-muted: #6e7681;
  --color-accent: #58a6ff;
  --color-accent-hover: #79b8ff;
  --color-success: #3fb950;
  --color-warning: #d29922;
  --color-error: #f85149;
  --color-border: #30363d;
  --color-code-bg: #161b22;
  
  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
}

/* 浅色主题 */
[data-theme="light"] {
  --color-bg: #ffffff;
  --color-bg-secondary: #f6f8fa;
  --color-bg-tertiary: #eaeef2;
  --color-text: #24292f;
  --color-text-secondary: #57606a;
  --color-text-muted: #8c959f;
  --color-accent: #0969da;
  --color-accent-hover: #0550ae;
  --color-success: #1a7f37;
  --color-warning: #9a6700;
  --color-error: #cf222e;
  --color-border: #d0d7de;
  --color-code-bg: #f6f8fa;
  
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.2);
}

/* 通用变量 */
:root {
  /* 间距 */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  
  /* 字体 */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif;
  --font-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, monospace;
  
  /* 圆角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;
  
  /* 过渡 */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  
  /* 容器宽度 */
  --container-max: 900px;
  --container-wide: 1200px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  min-height: 100vh;
}

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

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

img {
  max-width: 100%;
  height: auto;
}

/* 容器 */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.container-wide {
  max-width: var(--container-wide);
}

/* =====================================================
   导航栏
   ===================================================== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(12px);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.navbar-brand {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text);
}

.navbar-brand:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.navbar-menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  list-style: none;
}

.navbar-menu a {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  padding: var(--spacing-sm) 0;
  position: relative;
}

.navbar-menu a:hover,
.navbar-menu a.active {
  color: var(--color-text);
  text-decoration: none;
}

.navbar-menu a.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-accent);
  border-radius: var(--radius-full);
}

/* 移动端菜单按钮 */
.navbar-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-text);
  cursor: pointer;
  padding: var(--spacing-sm);
}

/* 主题切换按钮 */
.theme-toggle {
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  cursor: pointer;
  padding: var(--spacing-sm);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

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

.theme-toggle svg {
  width: 18px;
  height: 18px;
}

.theme-toggle .icon-sun {
  display: none;
}

.theme-toggle .icon-moon {
  display: block;
}

[data-theme="light"] .theme-toggle .icon-sun {
  display: block;
}

[data-theme="light"] .theme-toggle .icon-moon {
  display: none;
}

.navbar-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

@media (max-width: 768px) {
  .navbar-toggle {
    display: block;
  }
  
  .navbar-menu {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    flex-direction: column;
    background-color: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-md);
    gap: var(--spacing-md);
  }
  
  .navbar-menu.active {
    display: flex;
  }
}

/* =====================================================
   页面头部
   ===================================================== */
.page-header {
  padding: var(--spacing-2xl) 0;
  text-align: center;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--spacing-2xl);
}

.page-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.page-description {
  color: var(--color-text-secondary);
  font-size: 1rem;
}

/* =====================================================
   博文卡片
   ===================================================== */
.post-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

.post-card {
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.post-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
}

.post-card-title {
  font-size: 1.35rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.post-card-title a {
  color: var(--color-text);
}

.post-card-title a:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.post-card-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

.post-card-meta-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.post-card-excerpt {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
  margin-bottom: var(--spacing-md);
}

.post-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* 标签 */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  background-color: var(--color-bg-tertiary);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.tag:hover {
  background-color: var(--color-accent);
  color: var(--color-bg);
  text-decoration: none;
}

/* 分类 */
.category {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  background-color: rgba(88, 166, 255, 0.1);
  border: 1px solid rgba(88, 166, 255, 0.3);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  color: var(--color-accent);
}

.category:hover {
  background-color: rgba(88, 166, 255, 0.2);
  text-decoration: none;
}

/* =====================================================
   博文详情
   ===================================================== */
.post-header {
  margin-bottom: var(--spacing-2xl);
  padding-bottom: var(--spacing-xl);
  border-bottom: 1px solid var(--color-border);
}

.post-title {
  font-size: 2.25rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--spacing-lg);
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}

.post-meta-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.post-meta-icon {
  width: 16px;
  height: 16px;
  opacity: 0.7;
}

/* 博文内容 */
.post-content {
  font-size: 1rem;
  line-height: 1.9;
}

.post-content h1,
.post-content h2,
.post-content h3,
.post-content h4,
.post-content h5,
.post-content h6 {
  color: var(--color-text);
  font-weight: 600;
  margin-top: var(--spacing-2xl);
  margin-bottom: var(--spacing-md);
  line-height: 1.4;
}

.post-content h2 {
  font-size: 1.6rem;
  padding-bottom: var(--spacing-sm);
  border-bottom: 1px solid var(--color-border);
}

.post-content h3 {
  font-size: 1.3rem;
}

.post-content p {
  margin-bottom: var(--spacing-lg);
}

.post-content ul,
.post-content ol {
  margin-bottom: var(--spacing-lg);
  padding-left: var(--spacing-xl);
}

.post-content li {
  margin-bottom: var(--spacing-sm);
}

.post-content blockquote {
  margin: var(--spacing-lg) 0;
  padding: var(--spacing-md) var(--spacing-lg);
  border-left: 4px solid var(--color-accent);
  background-color: var(--color-bg-secondary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--color-text-secondary);
}

.post-content blockquote p {
  margin-bottom: 0;
}

.post-content pre {
  margin: var(--spacing-lg) 0;
  padding: var(--spacing-lg);
  background-color: var(--color-code-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1.6;
}

.post-content code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  padding: 2px 6px;
  background-color: var(--color-bg-tertiary);
  border-radius: var(--radius-sm);
}

.post-content pre code {
  padding: 0;
  background-color: transparent;
}

.post-content img {
  margin: var(--spacing-lg) 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.post-content table {
  width: 100%;
  margin: var(--spacing-lg) 0;
  border-collapse: collapse;
}

.post-content th,
.post-content td {
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--color-border);
  text-align: left;
}

.post-content th {
  background-color: var(--color-bg-secondary);
  font-weight: 600;
}

.post-content hr {
  margin: var(--spacing-2xl) 0;
  border: none;
  border-top: 1px solid var(--color-border);
}

/* 上下篇导航 */
.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-2xl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--color-border);
}

.post-nav-item {
  padding: var(--spacing-lg);
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast);
}

.post-nav-item:hover {
  border-color: var(--color-accent);
  text-decoration: none;
}

.post-nav-item.next {
  text-align: right;
}

.post-nav-label {
  display: block;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-xs);
}

.post-nav-title {
  color: var(--color-text);
  font-weight: 500;
}

.post-nav-item:hover .post-nav-title {
  color: var(--color-accent);
}

@media (max-width: 600px) {
  .post-nav {
    grid-template-columns: 1fr;
  }
  
  .post-nav-item.next {
    text-align: left;
  }
}

/* =====================================================
   说说卡片
   ===================================================== */
.moments-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.moment-card {
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  position: relative;
}

.moment-card::before {
  content: '';
  position: absolute;
  top: var(--spacing-lg);
  left: 0;
  width: 3px;
  height: calc(100% - var(--spacing-2xl));
  background: linear-gradient(180deg, var(--color-accent), var(--color-success));
  border-radius: var(--radius-full);
}

.moment-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.moment-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--color-bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  font-weight: 600;
}

.moment-author {
  font-weight: 500;
  color: var(--color-text);
}

.moment-time {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.moment-content {
  color: var(--color-text);
  line-height: 1.8;
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-md);
}

.moment-images {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: var(--spacing-sm);
  padding-left: var(--spacing-md);
}

.moment-image {
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.moment-image:hover {
  transform: scale(1.02);
}

/* =====================================================
   友链卡片
   ===================================================== */
.friends-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.friend-card {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
}

.friend-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  text-decoration: none;
}

.friend-avatar {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--color-border);
  flex-shrink: 0;
}

.friend-avatar-placeholder {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background-color: var(--color-bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  font-size: 1.5rem;
  font-weight: 600;
  flex-shrink: 0;
}

.friend-info {
  flex: 1;
  min-width: 0;
}

.friend-name {
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 2px;
}

.friend-url {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.friend-description {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-top: var(--spacing-xs);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* =====================================================
   归档页面
   ===================================================== */
.archive-list {
  position: relative;
}

.archive-year {
  margin-bottom: var(--spacing-2xl);
}

.archive-year-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--spacing-lg);
  position: relative;
  display: inline-block;
}

.archive-year-title::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), transparent);
  border-radius: var(--radius-full);
}

.archive-month {
  margin-bottom: var(--spacing-xl);
}

.archive-month-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-lg);
}

.archive-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--color-border);
}

.archive-item:last-child {
  border-bottom: none;
}

.archive-date {
  flex-shrink: 0;
  width: 60px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
}

.archive-item-title {
  flex: 1;
  color: var(--color-text);
  font-weight: 500;
}

.archive-item-title:hover {
  color: var(--color-accent);
}

.archive-item-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}

/* =====================================================
   标签云
   ===================================================== */
.tags-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  padding: var(--spacing-lg);
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.tags-cloud .tag {
  font-size: 0.9rem;
  padding: 4px 14px;
}

.tags-cloud .tag.size-1 { font-size: 0.8rem; }
.tags-cloud .tag.size-2 { font-size: 0.9rem; }
.tags-cloud .tag.size-3 { font-size: 1rem; }
.tags-cloud .tag.size-4 { font-size: 1.1rem; }
.tags-cloud .tag.size-5 { font-size: 1.2rem; }

/* 标签详情页 */
.tag-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.tag-icon {
  width: 48px;
  height: 48px;
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
}

/* =====================================================
   关于页面
   ===================================================== */
.about-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.about-avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  border: 3px solid var(--color-accent);
  margin-bottom: var(--spacing-lg);
}

.about-name {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

.about-bio {
  color: var(--color-text-secondary);
  font-size: 1.1rem;
}

.about-content {
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.about-stat {
  text-align: center;
  padding: var(--spacing-lg);
  background-color: var(--color-bg-tertiary);
  border-radius: var(--radius-md);
}

.about-stat-number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: var(--spacing-xs);
}

.about-stat-label {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

/* =====================================================
   页脚
   ===================================================== */
.footer {
  margin-top: var(--spacing-2xl);
  padding: var(--spacing-xl) 0;
  border-top: 1px solid var(--color-border);
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.footer-links a {
  color: var(--color-text-secondary);
}

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

/* =====================================================
   通用组件
   ===================================================== */

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
}

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

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  text-decoration: none;
  color: var(--color-bg);
}

.btn-secondary {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  border-color: var(--color-accent);
  text-decoration: none;
}

/* 空状态 */
.empty-state {
  text-align: center;
  padding: var(--spacing-2xl);
  color: var(--color-text-secondary);
}

.empty-state-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  opacity: 0.5;
}

/* 分隔线 */
.divider {
  height: 1px;
  background-color: var(--color-border);
  margin: var(--spacing-xl) 0;
}

/* Mermaid 图表样式 */
.mermaid {
  background-color: var(--color-bg-secondary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  margin: var(--spacing-lg) 0;
  text-align: center;
}

/* KaTeX 数学公式样式 */
.katex-display {
  margin: var(--spacing-lg) 0;
  overflow-x: auto;
  padding: var(--spacing-md);
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-md);
}

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

.fade-in {
  animation: fadeIn 0.3s ease forwards;
}

/* 响应式调整 */
@media (max-width: 768px) {
  :root {
    --spacing-lg: 1rem;
    --spacing-xl: 1.5rem;
    --spacing-2xl: 2rem;
  }
  
  .post-title {
    font-size: 1.75rem;
  }
  
  .page-title {
    font-size: 1.5rem;
  }
  
  .about-avatar {
    width: 100px;
    height: 100px;
  }
  
  .friends-grid {
    grid-template-columns: 1fr;
  }
}

/* =====================================================
   代码高亮
   ===================================================== */
@import url('highlight.css');