/**
 * Docusaurus Theme for Typecho
 * 
 * @package Docusaurus
 */

/* ==================== CSS Variables ==================== */
:root {
    /* Light Theme Colors */
    --background-primary: #ffffff;
    --background-secondary: #f6f7f8;
    --background-tertiary: #f0f2f5;
    --text-primary: #24292f;
    --text-secondary: #57606a;
    --text-tertiary: #8b949e;
    --border-color: #e5e7eb;
    --border-color-light: #e1e4e8;
    
    /* Brand Colors */
    --primary-color: #2483ff;
    --primary-hover: #1a6be6;
    --primary-light: #f0f6ff;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Layout */
    --header-height: 60px;
    --sidebar-width: 300px;
    --container-max-width: 1200px;
    --content-max-width: 800px;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
}

/* Dark Theme Colors */
[data-theme="dark"] {
    --background-primary: #1b1b1d;
    --background-secondary: #242526;
    --background-tertiary: #2c2d2f;
    --text-primary: #f0f6fc;
    --text-secondary: #8b949e;
    --text-tertiary: #6e7681;
    --border-color: #30363d;
    --border-color-light: #21262d;
    --primary-light: rgba(36, 131, 255, 0.15);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
}

/* ==================== Reset & Base ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--background-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    padding-top: var(--header-height);
}

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

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

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

/* ==================== Layout ==================== */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.main-wrapper {
    display: flex;
    margin-top: var(--spacing-lg);
    min-height: calc(100vh - var(--header-height) - var(--spacing-2xl));
}

.content-wrapper {
    flex: 1;
    min-width: 0;
    padding-right: var(--spacing-xl);
}

.sidebar-wrapper {
    width: var(--sidebar-width);
    flex-shrink: 0;
}

/* ==================== Header ==================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background-color: var(--background-primary);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.header-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.header-logo img {
    height: 32px;
    width: auto;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.current {
    color: var(--primary-color);
    background-color: var(--primary-light);
}

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

/* Search Box */
.search-box {
    position: relative;
    display: flex;
    align-items: center;
}

.search-input {
    padding: var(--spacing-sm) var(--spacing-md);
    padding-left: 2.25rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--background-secondary);
    color: var(--text-primary);
    font-size: 0.875rem;
    width: 200px;
    transition: all var(--transition-fast);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    width: 280px;
}

.search-icon {
    position: absolute;
    left: var(--spacing-sm);
    width: 16px;
    height: 16px;
    color: var(--text-tertiary);
    pointer-events: none;
}

/* Theme Toggle */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--background-secondary);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    background-color: var(--primary-light);
    color: var(--primary-color);
    border-color: var(--primary-color);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    padding: var(--spacing-sm);
    cursor: pointer;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--text-secondary);
    transition: all var(--transition-fast);
}

/* ==================== Hero Section ==================== */
.hero {
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-lg);
    background: linear-gradient(135deg, var(--background-secondary) 0%, var(--background-primary) 100%);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xl);
}

.hero h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ==================== Post Cards ==================== */
.posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.post-card {
    display: flex;
    flex-direction: column;
    padding: var(--spacing-lg);
    background-color: var(--background-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
}

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

.post-card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

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

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

.post-card-excerpt {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    margin-bottom: var(--spacing-md);
    flex-grow: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.post-card-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 0.875rem;
    color: var(--text-tertiary);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.post-card-meta-item {
    display: flex;
    align-items: center;
    gap: 4px;
}

.post-card-meta-item svg {
    width: 14px;
    height: 14px;
}

/* ==================== Pagination ==================== */
.pagination {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-xl);
}

.pagination-item {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--background-secondary);
    color: var(--text-primary);
    font-size: 0.9375rem;
    transition: all var(--transition-fast);
}

.pagination-item:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.pagination-item.active {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: #ffffff;
}

/* ==================== Sidebar Widgets ==================== */
.widget {
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg);
    background-color: var(--background-secondary);
    border-radius: var(--radius-lg);
}

.widget-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--border-color);
    color: var(--text-primary);
}

.widget-list {
    list-style: none;
}

.widget-list li {
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-color);
}

.widget-list li:last-child {
    border-bottom: none;
}

.widget-list a {
    display: block;
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.5;
    transition: color var(--transition-fast);
}

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

/* ==================== Post Detail ==================== */
.post {
    max-width: var(--content-max-width);
    margin: 0 auto;
}

.post-header {
    margin-bottom: var(--spacing-xl);
}

.post-title {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.post-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    font-size: 0.9375rem;
    color: var(--text-tertiary);
    flex-wrap: wrap;
}

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

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

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

/* ==================== Post Navigation ==================== */
.post-nav {
    display: flex;
    justify-content: space-between;
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
}

.post-nav-prev,
.post-nav-next {
    flex: 0 0 auto;
}

.post-nav-prev a,
.post-nav-next a {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--background-secondary);
    color: var(--text-primary);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: all var(--transition-fast);
    min-width: 120px;
    text-align: center;
}

.post-nav-prev a:hover,
.post-nav-next a:hover {
    background-color: var(--primary-light);
    color: var(--primary-color);
}

.post-nav-prev a::before {
    content: "上一篇文章：";
    margin-right: 0.25rem;
}

.post-nav-next a::before {
    content: "下一篇文章： ";
    margin-left: 0.25rem;
}

.post-nav-prev {
    text-align: left;
}

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

.post-content h2 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-top: var(--spacing-2xl);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
}

.post-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-sm);
}

.post-content h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

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

.post-content a {
    text-decoration: underline;
    text-underline-offset: 2px;
}

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

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

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

.post-content code {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    padding: 0.2em 0.4em;
    background-color: var(--background-tertiary);
    border-radius: var(--radius-sm);
}

.post-content pre {
    margin: var(--spacing-md) 0;
    padding: var(--spacing-md);
    background-color: var(--background-tertiary);
    border-radius: var(--radius-md);
    overflow-x: auto;
}

.post-content pre code {
    background-color: transparent;
    padding: 0;
    font-size: 0.9375rem;
}

.post-content table {
    width: 100%;
    margin-bottom: var(--spacing-md);
    border-collapse: collapse;
    overflow: hidden;
}

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

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

.post-content img {
    border-radius: var(--radius-md);
    margin: var(--spacing-md) 0;
}

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

/* ==================== Code Copy Button ==================== */
.code-block-wrapper {
    position: relative;
}

.code-copy-btn {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    padding: 0.25rem 0.5rem;
    background-color: var(--background-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 4px;
}

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

.code-copy-btn.copied {
    background-color: var(--success-color);
    border-color: var(--success-color);
    color: #ffffff;
}

/* ==================== Table of Contents ==================== */
.toc-container {
    position: sticky;
    top: calc(var(--header-height) + var(--spacing-lg));
    max-height: calc(100vh - var(--header-height) - var(--spacing-2xl));
    overflow-y: auto;
    padding: var(--spacing-lg);
    background-color: var(--background-secondary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xl);
}

.toc-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

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

.toc-item {
    margin-bottom: var(--spacing-xs);
}

.toc-link {
    display: block;
    padding: var(--spacing-xs) var(--spacing-sm);
    color: var(--text-secondary);
    font-size: 0.875rem;
    border-left: 2px solid var(--border-color);
    transition: all var(--transition-fast);
}

.toc-link:hover,
.toc-link.active {
    color: var(--primary-color);
    border-left-color: var(--primary-color);
    background-color: var(--primary-light);
}

.toc-sub {
    margin-left: var(--spacing-md);
}

/* ==================== Comments ==================== */
.comments-section {
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
}

.comments-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

/* Pagination */
.comments-pagination-top,
.comments-pagination-bottom {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin: var(--spacing-md) 0;
}

/* Empty comments */
.no-comments,
.comments-closed {
    text-align: center;
    padding: var(--spacing-xl);
    background-color: var(--background-secondary);
    border-radius: var(--radius-lg);
    color: var(--text-tertiary);
}

/* Comment List */
.comment-list {
    list-style: none;
}

/* ========================================
   NESTED COMMENT STRUCTURE
   ======================================== */

/* Base comment item */
.comment-item {
    position: relative;
}

/* ========================================
   LEVEL 0: Main Comments (Top Level)
   ======================================== */
.comment-item.comment-parent,
.comment-list > .comment-item {
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--background-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
}

.comment-item.comment-parent .comment-wrapper,
.comment-list > .comment-item .comment-wrapper {
    padding-left: 0;
}

/* ========================================
   LEVEL 1: First Nested Comments (Green Theme)
   ======================================== */
.comment-children > .comment-list > .comment-item,
.comment-item.comment-child {
    padding: var(--spacing-xs) var(--spacing-sm);
    margin-top: var(--spacing-xs);
    margin-bottom: var(--spacing-xs);
    border-left: 4px solid #6ee7b7;
    border-radius: 0 4px 4px 0;
}

/* ========================================
   LEVEL 2: Second Nested Comments
   ======================================== */
.comment-children > .comment-list > .comment-item > .comment-children > .comment-list > .comment-item,
.comment-children .comment-item.comment-child {
    margin-left: 1rem;
    border-left-color: #34d399;
}

/* ========================================
   LEVEL 3+: Deep Nested Comments
   ======================================== */
.comment-children > .comment-list > .comment-item > .comment-children > .comment-list > .comment-item > .comment-children > .comment-list > .comment-item,
.comment-children .comment-children .comment-item {
    margin-left: 2rem;
    border-left-color: #059669;
}

.comment-children > .comment-list > .comment-item > .comment-children > .comment-list > .comment-item > .comment-children > .comment-list > .comment-item > .comment-children > .comment-list > .comment-item,
.comment-children .comment-children .comment-children .comment-item {
    margin-left: 3rem;
    border-left-color: #047857;
}

/* ========================================
   COMMENT WRAPPER & CONTENT AREA
   ======================================== */
.comment-wrapper {
    width: 100%;
}

/* ========================================
   COMMENT HEADER (Single Row Layout)
   ======================================== */
.comment-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-xs);
}

.comment-avatar {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    flex-shrink: 0;
}

.comment-author {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.875rem;
}

.author-badge {
    font-size: 0.6875rem;
    padding: 0.125rem 0.375rem;
    border-radius: var(--radius-sm);
    background-color: var(--primary-color);
    color: #ffffff;
    margin-left: 4px;
}

.comment-time {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin-left: auto;
}

.comment-time:hover {
    color: var(--text-secondary);
}

.comment-reply-link {
    font-size: 0.75rem;
    color: var(--primary-color);
    cursor: pointer;
    margin-left: var(--spacing-sm);
}

.comment-reply-link:hover {
    text-decoration: underline;
}

/* ========================================
   COMMENT TEXT
   ======================================== */
.comment-text {
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 0.875rem;
}

.comment-text p {
    margin-bottom: 0.25rem;
}

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

/* ========================================
   AUTHOR COMMENT HIGHLIGHTING
   ======================================== */
.comment-by-author {
    background-color: var(--primary-light) !important;
    border-color: var(--primary-color) !important;
}

/* ========================================
   COMMENT CHILDREN CONTAINER
   ======================================== */
.comment-children {
    margin-top: var(--spacing-xs);
}

.comment-children .comment-list {
    list-style: none;
}

/* ========================================
   COMMENT FORM
   ======================================== */
.comment-form-container {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-md);
    background-color: var(--background-secondary);
    border-radius: var(--radius-md);
}

.comment-form-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.logged-in-user {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    font-size: 0.875rem;
}

.logged-in-user a {
    color: var(--primary-color);
}

.comment-form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.comment-input {
    width: 100%;
    padding: 0.5rem var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background-color: var(--background-primary);
    color: var(--text-primary);
    font-size: 0.875rem;
    transition: border-color var(--transition-fast);
}

.comment-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.comment-input-full {
    display: block;
    margin-bottom: var(--spacing-sm);
}

.comment-textarea {
    width: 100%;
    padding: 0.5rem var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background-color: var(--background-primary);
    color: var(--text-primary);
    font-size: 0.875rem;
    font-family: inherit;
    resize: vertical;
    min-height: 80px;
    margin-bottom: var(--spacing-sm);
    transition: border-color var(--transition-fast);
}

.comment-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.comment-submit-btn {
    padding: 0.5rem var(--spacing-lg);
    background-color: var(--primary-color);
    color: #ffffff;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.comment-submit-btn:hover {
    background-color: var(--primary-hover);
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */
@media (max-width: 768px) {
    .comment-form-row {
        grid-template-columns: 1fr;
    }
    
    .comment-header {
        gap: var(--spacing-xs);
    }
    
    .comment-time {
        margin-left: 0;
    }
    
    /* Reduce indentation on mobile */
    .comment-children > .comment-list > .comment-item,
    .comment-item.comment-child {
        margin-left: 0;
    }
    
    .comment-children > .comment-list > .comment-item > .comment-children > .comment-list > .comment-item,
    .comment-children .comment-item.comment-child {
        margin-left: 0.5rem;
    }
    
    .comment-children > .comment-list > .comment-item > .comment-children > .comment-list > .comment-item > .comment-children > .comment-list > .comment-item,
    .comment-children .comment-children .comment-item {
        margin-left: 1rem;
    }
    
    .comment-children > .comment-list > .comment-item > .comment-children > .comment-list > .comment-item > .comment-children > .comment-list > .comment-item > .comment-children > .comment-list > .comment-item,
    .comment-children .comment-children .comment-children .comment-item {
        margin-left: 1.5rem;
    }
}

/* ========================================
   DARK THEME ADJUSTMENTS (Green Theme)
   ======================================== */
[data-theme="dark"] .comment-item.comment-parent,
[data-theme="dark"] .comment-list > .comment-item {
    background-color: var(--background-secondary);
    border-color: var(--border-color);
}

[data-theme="dark"] .comment-children > .comment-list > .comment-item,
[data-theme="dark"] .comment-item.comment-child {
    border-left-color: #6ee7b7;
}

[data-theme="dark"] .comment-children > .comment-list > .comment-item > .comment-children > .comment-list > .comment-item,
[data-theme="dark"] .comment-children .comment-item.comment-child {
    border-left-color: #34d399;
}

[data-theme="dark"] .comment-children > .comment-list > .comment-item > .comment-children > .comment-list > .comment-item > .comment-children > .comment-list > .comment-item,
[data-theme="dark"] .comment-children .comment-children .comment-item {
    border-left-color: #059669;
}

[data-theme="dark"] .comment-children > .comment-list > .comment-item > .comment-children > .comment-list > .comment-item > .comment-children > .comment-list > .comment-item > .comment-children > .comment-list > .comment-item,
[data-theme="dark"] .comment-children .comment-children .comment-children .comment-item {
    border-left-color: #047857;
}

/* Comment Form */
.comment-form {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    background-color: var(--background-secondary);
    border-radius: var(--radius-lg);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    color: var(--text-primary);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--background-primary);
    color: var(--text-primary);
    font-size: 0.9375rem;
    font-family: inherit;
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-xl);
    background-color: var(--primary-color);
    color: #ffffff;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

/* ==================== Footer ==================== */
.footer {
    margin-top: var(--spacing-2xl);
    padding: var(--spacing-xl) 0;
    border-top: 1px solid var(--border-color);
    background-color: var(--background-secondary);
}

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

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
}

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

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

.footer-copyright {
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

/* ==================== 404 Page ==================== */
.error-page {
    text-align: center;
    padding: var(--spacing-2xl);
}

.error-code {
    font-size: 6rem;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1;
}

.error-title {
    font-size: 2rem;
    font-weight: 600;
    margin: var(--spacing-lg) 0;
    color: var(--text-primary);
}

.error-message {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.error-home-link {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-xl);
    background-color: var(--primary-color);
    color: #ffffff;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.error-home-link:hover {
    background-color: var(--primary-hover);
    color: #ffffff;
}

/* ==================== Breadcrumbs ==================== */
.breadcrumbs {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) 0;
    margin-bottom: var(--spacing-lg);
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

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

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

.breadcrumb-separator {
    color: var(--text-tertiary);
}

/* ==================== Tags ==================== */
.tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.tag {
    padding: var(--spacing-xs) var(--spacing-md);
    background-color: var(--background-tertiary);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.tag:hover {
    background-color: var(--primary-light);
    color: var(--primary-color);
}

/* ==================== Responsive ==================== */
@media (max-width: 1024px) {
    .content-wrapper {
        padding-right: var(--spacing-md);
    }
    
    .sidebar-wrapper {
        width: 250px;
    }
}

@media (max-width: 768px) {
    .main-wrapper {
        flex-direction: column;
    }
    
    .content-wrapper {
        padding-right: 0;
        order: 1;
    }
    
    .sidebar-wrapper {
        width: 100%;
        order: 2;
        margin-top: var(--spacing-xl);
    }
    
    .nav-menu {
        display: none;
        position: absolute;
        top: var(--header-height);
        left: 0;
        right: 0;
        flex-direction: column;
        background-color: var(--background-primary);
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .search-box {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .posts-grid {
        grid-template-columns: 1fr;
    }
    
    .post-title {
        font-size: 1.75rem;
    }
    
    .toc-container {
        display: none;
    }
    
    .footer-inner {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
}

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

.post-card {
    animation: fadeIn 0.3s ease;
}