/*
Theme Name: TechBlog Pro
Theme URI: https://github.com/techblog-pro
Author: TechBlog Team
Author URI: https://github.com
Description: 一个专为IT技术分享设计的现代化WordPress主题，支持代码高亮、暗色模式、响应式布局
Version: 1.0.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: techblog
Tags: blog, technology, code, dark-mode, responsive
*/

/* ==================== CSS Variables ==================== */
:root {
    /* Light Mode Colors */
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #7c3aed;
    --accent-color: #06b6d4;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-code: #1e293b;
    
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --text-code: #e2e8f0;
    
    --border-color: #e2e8f0;
    --border-hover: #cbd5e1;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
    
    --header-height: 64px;
    --sidebar-width: 300px;
    --content-max-width: 780px;
    --container-max-width: 1280px;
    
    --transition: all 0.2s ease;
}

/* Dark Mode */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-code: #0d1117;
    
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --text-code: #e2e8f0;
    
    --border-color: #334155;
    --border-hover: #475569;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4), 0 2px 4px -2px rgb(0 0 0 / 0.3);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4), 0 4px 6px -4px rgb(0 0 0 / 0.3);
}

/* ==================== Base Styles ==================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-height) + 20px);
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    transition: background-color 0.3s ease, color 0.3s ease;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

/* ==================== Header ==================== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.header-inner {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 24px;
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.site-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.site-logo svg {
    width: 32px;
    height: 32px;
    fill: var(--primary-color);
}

/* Navigation */
.main-nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.main-nav a {
    padding: 8px 16px;
    color: var(--text-secondary);
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.main-nav a:hover,
.main-nav a.current {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.search-toggle,
.theme-toggle,
.mobile-menu-toggle {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.search-toggle:hover,
.theme-toggle:hover,
.mobile-menu-toggle:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--border-hover);
}

.theme-toggle svg,
.search-toggle svg {
    width: 20px;
    height: 20px;
}

.mobile-menu-toggle {
    display: none;
}

/* ==================== Layout ==================== */
.site-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 32px 24px;
    display: grid;
    grid-template-columns: 1fr var(--sidebar-width);
    gap: 40px;
}

.content-area {
    min-width: 0;
}

/* ==================== Hero Section ==================== */
.hero-section {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-xl);
    padding: 48px;
    margin-bottom: 40px;
    color: white;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    transform: translate(30%, -30%);
}

.hero-title {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 12px;
    position: relative;
}

.hero-description {
    font-size: 1.0625rem;
    opacity: 0.9;
    max-width: 600px;
    position: relative;
}

/* ==================== Post Cards ==================== */
.posts-grid {
    display: grid;
    gap: 24px;
}

.post-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: var(--transition);
}

.post-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.post-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.post-category {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 100px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.post-date {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.post-card-title {
    font-size: 1.375rem;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.post-card-title a {
    color: inherit;
}

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

.post-excerpt {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
    margin-bottom: 20px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.post-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.post-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.post-meta-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.post-meta-item svg {
    width: 16px;
    height: 16px;
}

.read-more {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-color);
}

.read-more svg {
    width: 16px;
    height: 16px;
    transition: transform 0.2s ease;
}

.read-more:hover svg {
    transform: translateX(4px);
}

/* ==================== Single Post ==================== */
.single-post {
    width: 100%;
}

/* Post Footer - Tags & Share */
.post-footer {
    margin-top: 40px;
    padding-top: 32px;
    border-top: 1px solid var(--border-color);
}

.post-tags {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.post-tags svg {
    color: var(--text-muted);
    flex-shrink: 0;
}

.post-tags a {
    display: inline-block;
    padding: 6px 14px;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border-radius: 100px;
    font-size: 0.8125rem;
    font-weight: 500;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.post-tags a:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-1px);
}

.share-section {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.share-label {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9375rem;
}

.share-label svg {
    color: var(--text-muted);
}

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

.share-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

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

.share-twitter:hover {
    background: #000;
    color: white;
    border-color: #000;
}

.share-linkedin:hover {
    background: #0077b5;
    color: white;
    border-color: #0077b5;
}

.share-copy:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.share-copy.copied {
    background: #22c55e;
    color: white;
    border-color: #22c55e;
}

/* ==================== Comments Area ==================== */
.comments-area {
    margin-top: 48px;
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
}

.comments-title {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 32px;
    color: var(--text-primary);
}

.comments-title svg {
    color: var(--primary-color);
}

.comment-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.comment-item {
    margin-bottom: 24px;
}

.comment-item .children {
    list-style: none;
    padding-left: 48px;
    margin-top: 24px;
}

.comment-body {
    display: flex;
    gap: 16px;
    padding: 24px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.comment-body:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-sm);
}

.comment-avatar {
    flex-shrink: 0;
}

.comment-avatar img {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 2px solid var(--bg-secondary);
}

.comment-content {
    flex: 1;
    min-width: 0;
}

.comment-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
}

.comment-author {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9375rem;
}

.comment-author a {
    color: var(--text-primary);
    text-decoration: none;
}

.comment-author a:hover {
    color: var(--primary-color);
}

.comment-header time {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.comment-text {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.9375rem;
}

.comment-text p:last-child {
    margin-bottom: 0;
}

.comment-actions {
    margin-top: 12px;
}

.comment-actions a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8125rem;
    color: var(--text-muted);
    font-weight: 500;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.comment-actions a:hover {
    color: var(--primary-color);
    background: rgba(37, 99, 235, 0.05);
}

/* Comment Form */
.comment-form {
    margin-top: 40px;
    padding: 32px;
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
}

.comment-form-group {
    margin-bottom: 20px;
}

.comment-form-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
    font-size: 0.9375rem;
}

.comment-form-group label svg {
    color: var(--primary-color);
}

.comment-form-group textarea {
    width: 100%;
    padding: 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    resize: vertical;
    min-height: 120px;
    transition: var(--transition);
}

.comment-form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.comment-form-group textarea::placeholder {
    color: var(--text-muted);
}

.comment-form .comment-form-cookies-consent {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.comment-form .comment-form-cookies-consent input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary-color);
}

.comment-form .submit-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    font-family: var(--font-sans);
    cursor: pointer;
    transition: var(--transition);
}

.comment-form .submit-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.comment-form .submit-btn svg {
    transition: transform 0.2s ease;
}

.comment-form .submit-btn:hover svg {
    transform: translateX(2px) translateY(-2px);
}

.no-comments {
    text-align: center;
    padding: 32px;
    color: var(--text-muted);
    font-size: 0.9375rem;
}

.post-header {
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}

.post-header .post-category {
    margin-bottom: 16px;
}

.post-title {
    font-size: 2.25rem;
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.post-meta-full {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 20px;
    color: var(--text-muted);
    font-size: 0.9375rem;
}

.post-meta-full a {
    color: var(--text-muted);
}

.post-meta-full a:hover {
    color: var(--primary-color);
}

.author-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 1rem;
}

/* ==================== Post Content ==================== */
.post-content {
    font-size: 1.0625rem;
    line-height: 1.8;
    color: var(--text-primary);
}

.post-content h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-top: 48px;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--border-color);
    letter-spacing: -0.01em;
}

.post-content h3 {
    font-size: 1.375rem;
    font-weight: 600;
    margin-top: 36px;
    margin-bottom: 16px;
}

.post-content h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-top: 28px;
    margin-bottom: 12px;
}

.post-content p {
    margin-bottom: 20px;
}

.post-content a {
    color: var(--primary-color);
    text-decoration: underline;
    text-decoration-color: rgba(37, 99, 235, 0.3);
    text-underline-offset: 3px;
}

.post-content a:hover {
    text-decoration-color: var(--primary-color);
}

.post-content ul,
.post-content ol {
    margin-bottom: 20px;
    padding-left: 28px;
}

.post-content li {
    margin-bottom: 8px;
}

.post-content li::marker {
    color: var(--primary-color);
}

.post-content blockquote {
    margin: 24px 0;
    padding: 20px 24px;
    border-left: 4px solid var(--primary-color);
    background: var(--bg-secondary);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    font-style: italic;
    color: var(--text-secondary);
}

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

.post-content img {
    border-radius: var(--radius-md);
    margin: 24px 0;
    box-shadow: var(--shadow-md);
}

.post-content hr {
    border: none;
    height: 1px;
    background: var(--border-color);
    margin: 40px 0;
}

.post-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    font-size: 0.9375rem;
}

.post-content th,
.post-content td {
    padding: 12px 16px;
    text-align: left;
    border: 1px solid var(--border-color);
}

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

.post-content tr:hover {
    background: var(--bg-secondary);
}

/* Inline Code */
.post-content code:not(pre code) {
    background: var(--bg-tertiary);
    color: var(--secondary-color);
    padding: 2px 8px;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.875em;
    font-weight: 500;
}

/* Code Blocks */
.post-content pre {
    background: var(--bg-code);
    color: var(--text-code);
    padding: 24px;
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin: 24px 0;
    position: relative;
    font-family: var(--font-mono);
    font-size: 0.9375rem;
    line-height: 1.6;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.post-content pre code {
    background: none;
    padding: 0;
    color: inherit;
    font-size: inherit;
}

.code-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    margin: -24px -24px 16px -24px;
    font-size: 0.8125rem;
}

.code-lang {
    color: var(--accent-color);
    font-weight: 600;
    text-transform: uppercase;
}

.copy-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    background: none;
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: rgba(255, 255, 255, 0.6);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.75rem;
    transition: var(--transition);
}

.copy-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.copy-btn svg {
    width: 14px;
    height: 14px;
}

/* ==================== Table of Contents ==================== */
.toc-container {
    position: sticky;
    top: calc(var(--header-height) + 32px);
}

.toc {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    max-height: calc(100vh - var(--header-height) - 64px);
    overflow-y: auto;
}

.toc-title {
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.toc-title svg {
    width: 16px;
    height: 16px;
}

.toc-list {
    list-style: none;
    padding: 0;
}

.toc-list li {
    margin-bottom: 4px;
}

.toc-list a {
    display: block;
    padding: 8px 12px;
    color: var(--text-secondary);
    font-size: 0.875rem;
    border-radius: var(--radius-sm);
    border-left: 2px solid transparent;
    transition: var(--transition);
}

.toc-list a:hover {
    color: var(--text-primary);
    background: var(--bg-secondary);
}

.toc-list a.active {
    color: var(--primary-color);
    background: rgba(37, 99, 235, 0.05);
    border-left-color: var(--primary-color);
    font-weight: 500;
}

.toc-list .toc-h3 {
    padding-left: 24px;
    font-size: 0.8125rem;
}

/* ==================== Sidebar ==================== */
.sidebar {
    position: sticky;
    top: calc(var(--header-height) + 32px);
    height: fit-content;
}

.sidebar-widget {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 24px;
}

.widget-title {
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--border-color);
}

/* Categories Widget */
.category-list {
    list-style: none;
}

.category-list li {
    margin-bottom: 8px;
}

.category-list a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    color: var(--text-secondary);
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    font-size: 0.9375rem;
    transition: var(--transition);
}

.category-list a:hover {
    background: var(--primary-color);
    color: white;
}

.category-count {
    background: var(--bg-primary);
    padding: 2px 10px;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
}

.category-list a:hover .category-count {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

/* Tags Widget */
.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag-cloud a {
    display: inline-block;
    padding: 6px 14px;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border-radius: 100px;
    font-size: 0.8125rem;
    transition: var(--transition);
}

.tag-cloud a:hover {
    background: var(--primary-color);
    color: white;
}

/* Recent Posts Widget */
.recent-posts-list {
    list-style: none;
}

.recent-posts-list li {
    padding: 16px 0;
    border-bottom: 1px solid var(--border-color);
}

.recent-posts-list li:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.recent-posts-list li:first-child {
    padding-top: 0;
}

.recent-post-title {
    display: block;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-primary);
    line-height: 1.4;
    margin-bottom: 6px;
}

.recent-post-title:hover {
    color: var(--primary-color);
}

.recent-post-date {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

/* ==================== Pagination ==================== */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 48px;
    padding-top: 32px;
    border-top: 1px solid var(--border-color);
}

.pagination a,
.pagination span {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.9375rem;
    font-weight: 500;
    transition: var(--transition);
}

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

.pagination a:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-color: var(--border-hover);
}

.pagination .current {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.pagination .dots {
    border: none;
    color: var(--text-muted);
}

/* ==================== Search Overlay ==================== */
.search-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(8px);
    z-index: 2000;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 20vh;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.search-overlay.active {
    opacity: 1;
    visibility: visible;
}

.search-container {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: 24px;
    width: 90%;
    max-width: 640px;
    box-shadow: var(--shadow-lg);
    transform: translateY(-20px);
    transition: transform 0.3s ease;
}

.search-overlay.active .search-container {
    transform: translateY(0);
}

.search-input-wrapper {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 2px solid var(--border-color);
    transition: var(--transition);
}

.search-input-wrapper:focus-within {
    border-color: var(--primary-color);
}

.search-input-wrapper svg {
    width: 20px;
    height: 20px;
    color: var(--text-muted);
    flex-shrink: 0;
}

.search-input {
    flex: 1;
    border: none;
    background: none;
    font-size: 1.0625rem;
    color: var(--text-primary);
    outline: none;
}

.search-input::placeholder {
    color: var(--text-muted);
}

.search-hint {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 12px;
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.search-hint kbd {
    background: var(--bg-tertiary);
    padding: 2px 8px;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
}

/* ==================== Footer ==================== */
.site-footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 48px 24px;
    margin-top: 64px;
}

.footer-inner {
    max-width: var(--container-max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 48px;
}

.footer-section h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.footer-section p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

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

.footer-bottom {
    max-width: var(--container-max-width);
    margin: 32px auto 0;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* ==================== Responsive ==================== */
@media (max-width: 1024px) {
    .site-container {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        position: static;
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }
    
    .sidebar-widget {
        margin-bottom: 0;
    }
    
    .toc-container {
        display: none;
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 56px;
    }
    
    .header-inner {
        padding: 0 16px;
    }
    
    .main-nav {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .main-nav.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: var(--bg-primary);
        border-bottom: 1px solid var(--border-color);
        padding: 16px;
        box-shadow: var(--shadow-md);
    }
    
    .main-nav.active a {
        padding: 12px 16px;
    }
    
    .site-container {
        padding: 20px 16px;
        gap: 24px;
    }
    
    .hero-section {
        padding: 32px 24px;
    }
    
    .hero-title {
        font-size: 1.5rem;
    }
    
    .post-card {
        padding: 20px;
    }
    
    .post-title {
        font-size: 1.75rem;
    }
    
    .post-content pre {
        padding: 16px;
        margin-left: -16px;
        margin-right: -16px;
        border-radius: 0;
    }
    
    .sidebar {
        grid-template-columns: 1fr;
    }
    
    .footer-inner {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }
}

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

.post-card {
    animation: fadeIn 0.5s ease forwards;
}

.post-card:nth-child(2) { animation-delay: 0.1s; }
.post-card:nth-child(3) { animation-delay: 0.2s; }
.post-card:nth-child(4) { animation-delay: 0.3s; }

/* ==================== Print Styles ==================== */
@media print {
    .site-header,
    .sidebar,
    .toc-container,
    .post-card-footer,
    .pagination {
        display: none !important;
    }
    
    .site-container {
        grid-template-columns: 1fr;
    }
    
    .post-content pre {
        white-space: pre-wrap;
        word-wrap: break-word;
    }
}