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

:root {
    /* Light Mode Colors */
    --primary-color: #3b82f6;
    --primary-dark: #2563eb;
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --text-light: #718096;
    --bg-primary: #ffffff;
    --bg-secondary: #f7fafc;
    --bg-tertiary: #edf2f7;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.1);
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-serif: 'Merriweather', Georgia, serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
}

/* Dark Mode Colors */
[data-theme="dark"] {
    --primary-color: #60a5fa;
    --primary-dark: #3b82f6;
    --text-primary: #f7fafc;
    --text-secondary: #cbd5e0;
    --text-light: #a0aec0;
    --bg-primary: #1a202c;
    --bg-secondary: #2d3748;
    --bg-tertiary: #4a5568;
    --border-color: #4a5568;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.3);
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 100px; /* Offset for fixed header */
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    display: flex;
    min-height: 100vh;
    transition: background-color var(--transition-base), color var(--transition-base);
}

.page-wrapper {
    display: flex;
    width: 100%;
    min-height: 100vh;
}

/* ===================================
   Typography
   =================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

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

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

/* ===================================
   Layout
   =================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===================================
   Header & Navigation
   =================================== */
.header {
    background-color: var(--bg-primary);
    position: sticky;
    top: 0;
    z-index: 50;
}

.nav {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    transition: color var(--transition-fast);
}

.logo:hover {
    color: var(--primary-dark);
}

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

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    transition: all var(--transition-base);
}

/* ===================================
   Left Sidebar Profile
   =================================== */
.left-sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: 320px;
    height: 100vh;
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-lg);
    padding-top: var(--spacing-2xl);
    z-index: 100;
    overflow-y: auto;
}

/* When sidebar has TOC, don't center vertically */
.left-sidebar.has-toc {
    justify-content: flex-start;
}

/* When sidebar doesn't have TOC, center vertically */
.left-sidebar:not(.has-toc) {
    justify-content: center;
}

.profile-sidebar-content {
    text-align: center;
    flex-shrink: 0;
}

.profile-image {
    margin-bottom: var(--spacing-md);
}

.avatar-img {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--bg-primary);
    box-shadow: var(--shadow-lg);
}

.profile-name {
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.profile-title {
    font-size: 0.9375rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
}

.profile-bio {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.875rem;
    margin-bottom: var(--spacing-md);
}

.profile-links {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

.profile-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--bg-primary);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.profile-link:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Main Content Area */
.main-content {
    margin-left: 320px;
    flex: 1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

/* ===================================
   Sections
   =================================== */
/* .featured-section, */
.recent-section,
.blog-section,
.about-section {
    padding: var(--spacing-2xl) 0;
}

.section-title {
    font-size: 2rem;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.view-all {
    color: var(--primary-color);
    font-weight: 500;
    transition: transform var(--transition-fast);
    display: inline-block;
}

.view-all:hover {
    transform: translateX(4px);
}

/* ===================================
   Page Header (Hidden)
   =================================== */
.page-header {
    display: none;
}

.page-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.page-subtitle {
    font-size: 1.125rem;
    color: var(--text-light);
}

/* ===================================
   Cards
   =================================== */
.featured-grid,
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.featured-card,
.blog-card {
    background-color: var(--bg-primary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.featured-card:hover,
.blog-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.card-link {
    display: block;
    color: inherit;
}

.card-image {
    width: 100%;
    height: 200px;
    background-size: cover;
    background-position: center;
}

.card-content {
    padding: var(--spacing-md);
}

.card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.card-category {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: var(--primary-color);
    color: white;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
}

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

.card-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.card-excerpt {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.6;
}

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

.read-time {
    color: var(--text-light);
    font-size: 0.875rem;
}

/* ===================================
   Post List
   =================================== */
.posts-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.post-item {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    transition: all var(--transition-base);
}

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

.post-link {
    display: block;
    color: inherit;
}

.post-meta {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

.post-category {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: var(--bg-tertiary);
    color: var(--primary-color);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
}

.post-date {
    color: var(--text-light);
    font-size: 0.875rem;
    line-height: 1.75;
}

.post-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.post-excerpt {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

/* ===================================
   Article Page
   =================================== */
.article-header {
    background-color: var(--bg-secondary);
    padding: var(--spacing-2xl) 0;
    border-bottom: 1px solid var(--border-color);
}

.article-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

.article-meta {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    color: var(--text-light);
}

.article-content {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-2xl) var(--spacing-md);
}

.article-content h2 {
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    font-size: 1.75rem;
}

.article-content h3 {
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    font-size: 1.375rem;
}

.article-content p {
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
    font-size: 1.0625rem;
}

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

.article-content li {
    margin-bottom: var(--spacing-xs);
    line-height: 1.8;
    color: var(--text-secondary);
}

.article-content code {
    background-color: var(--bg-secondary);
    padding: 0.125rem 0.375rem;
    border-radius: var(--radius-sm);
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 0.9em;
    color: var(--primary-color);
}

.article-content pre {
    background-color: #282c34;
    color: #f8f8f2;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin-bottom: var(--spacing-md);
}

[data-theme="dark"] .article-content pre {
    background-color: #1e1e1e;
    border: 1px solid var(--border-color);
}

.article-content pre code {
    background: none;
    padding: 0;
    color: inherit;
}

.article-content blockquote {
    border-left: 4px solid var(--primary-color);
    padding-left: var(--spacing-md);
    margin: var(--spacing-md) 0;
    font-style: italic;
    color: var(--text-secondary);
}

.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    margin: var(--spacing-md) 0;
}

/* ===================================
   About Page
   =================================== */
.about-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-2xl);
    align-items: start;
}

.about-image {
    position: sticky;
    top: 100px;
}

.avatar {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    margin: 0 auto;
    box-shadow: var(--shadow-lg);
}

.about-text h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
}

.about-text h3 {
    font-size: 1.5rem;
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-sm);
}

.about-text p {
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
    font-size: 1.0625rem;
}

.about-list {
    list-style: none;
    margin-bottom: var(--spacing-md);
}

.about-list li {
    padding: var(--spacing-xs) 0;
    padding-left: var(--spacing-md);
    position: relative;
    color: var(--text-secondary);
}

.about-list li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.about-cta {
    background-color: var(--bg-secondary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    margin-top: var(--spacing-xl);
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-top: var(--spacing-md);
}

.social-link {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background-color: var(--primary-color);
    color: white;
    border-radius: var(--radius-md);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.social-link:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

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

.footer-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: color var(--transition-fast);
    text-decoration: none;
}

.footer-link svg {
    flex-shrink: 0;
}

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

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

.footer-copyright p {
    margin: 0;
}

/* ===================================
   About Page Layout
   =================================== */
.about-page-section {
    padding: var(--spacing-lg);
}

.about-page-content h1 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
}

.about-page-content h2 {
    font-size: 1.5rem;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

.about-page-content p {
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.about-page-content ul {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-lg);
}

.about-page-content li {
    margin-bottom: var(--spacing-xs);
    line-height: 1.6;
}

.about-page-sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.about-sidebar-box {
    background-color: var(--bg-secondary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.about-sidebar-box h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.about-sidebar-box ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.about-sidebar-box li {
    margin-bottom: var(--spacing-xs);
}

.about-sidebar-box a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9375rem;
    transition: color var(--transition-fast);
}

.about-sidebar-box a:hover {
    color: var(--primary-color);
}

.about-copyright {
    text-align: center;
    color: var(--text-light);
    font-size: 0.875rem;
    padding-top: var(--spacing-md);
}

.about-copyright p {
    margin: 0;
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 1280px) {
    /* Hide floating TOC on smaller screens */
    .floating-toc {
        display: none;
    }
    
    /* Ensure article content uses full width */
    .article-content {
        max-width: 800px;
    }
    
    /* Hide sidebar on tablets and mobile */
    .left-sidebar {
        display: none;
    }
    
    .main-content {
        margin-left: 0;
    }
}

@media (max-width: 768px) {
    /* Typography */
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }
    
    .page-title { font-size: 2rem; }
    
    /* Profile Section */
    .profile-content {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .avatar-img {
        width: 150px;
        height: 150px;
    }
    
    .profile-name {
        font-size: 1.75rem;
    }
    
    .profile-links {
        justify-content: center;
    }
    
    /* About Page */
    .about-page-layout {
        grid-template-columns: 1fr;
    }
    
    .about-page-sidebar {
        order: -1;
    }
    
    /* Navigation */
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 60px;
        flex-direction: column;
        background-color: var(--bg-primary);
        width: 100%;
        text-align: center;
        transition: left var(--transition-base);
        box-shadow: var(--shadow-lg);
        padding: var(--spacing-md) 0;
        gap: 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-link {
        display: block;
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    /* Grids */
    .featured-grid,
    .blog-grid {
        grid-template-columns: 1fr;
    }
    
    /* About Page */
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .about-image {
        position: static;
    }
    
    .avatar {
        width: 150px;
        height: 150px;
    }
    
    /* Spacing */
    .hero,
    /* .featured-section, */
    .recent-section,
    .blog-section,
    .about-section,
    .page-header {
        padding: var(--spacing-xl) 0;
    }
    
    .article-content {
        padding: var(--spacing-xl) var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
    
    .social-links {
        flex-direction: column;
    }
    
    .social-link {
        text-align: center;
    }
}

/* ===================================
   Sidebar Table of Contents
   =================================== */
.sidebar-toc {
    width: 100%;
    padding-top: var(--spacing-sm);
}

.sidebar-toc .floating-toc {
    display: block !important; /* Always show when in sidebar */
    position: static;
    width: 100%;
    max-height: none;
    background-color: transparent;
    border: none;
    border-radius: 0;
    padding: 0;
    box-shadow: none;
}

.sidebar-toc .floating-toc-title {
    text-align: center;
    font-size: 0.875rem;
}

/* ===================================
   Floating Table of Contents (Hidden when in sidebar)
   =================================== */
.floating-toc {
    display: none; /* Hidden by default */
    position: fixed;
    top: 120px;
    right: 2rem;
    width: 280px;
    max-height: calc(100vh - 160px);
    overflow-y: auto;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-lg);
    z-index: 100;
    transition: opacity var(--transition-base), transform var(--transition-base);
}

.floating-toc.hidden {
    opacity: 0;
    transform: translateX(20px);
    pointer-events: none;
}

.floating-toc-title {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-light);
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-xs);
    border-bottom: 2px solid var(--border-color);
}

.floating-toc ul {
    list-style: none;
    padding-left: 0;
    margin: 0;
}

.floating-toc li {
    margin-bottom: 0.5rem;
}

.floating-toc li.toc-h3 {
    padding-left: 1rem;
}

.floating-toc a {
    display: block;
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.5;
    padding: 0.25rem 0;
    transition: all var(--transition-fast);
    border-left: 2px solid transparent;
    padding-left: 0.5rem;
}

.floating-toc a:hover {
    color: var(--primary-color);
    border-left-color: var(--primary-color);
    padding-left: 0.75rem;
}

.floating-toc a.active {
    color: var(--primary-color);
    font-weight: 600;
    border-left-color: var(--primary-color);
}

/* Scrollbar styling for TOC */
.floating-toc::-webkit-scrollbar {
    width: 6px;
}

.floating-toc::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: 3px;
}

.floating-toc::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

.floating-toc::-webkit-scrollbar-thumb:hover {
    background: var(--text-light);
}

/* ===================================
   Accessibility
   =================================== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Focus styles */
a:focus,
button:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--spacing-md) 0;
    background-color: var(--bg-primary);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

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

th {
    background-color: var(--bg-secondary);
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9em;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

td {
    color: var(--text-secondary);
}

tr:hover {
    background-color: var(--bg-secondary);
}

tr:last-child td {
    border-bottom: none;
}

/* Center aligned table cells */
th[align="center"], td[align="center"],
th[style*="text-align: center"], td[style*="text-align: center"] {
    text-align: center;
}

/* Tag cloud and tag archive */
.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin: var(--spacing-md) 0;
}

.tag-link {
    display: inline-block;
    padding: 0.5rem 1rem;
    background-color: var(--bg-secondary);
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-md);
    font-size: 0.9em;
    font-weight: 500;
    transition: var(--transition-fast);
    border: 1px solid var(--border-color);
}

.tag-link:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Tag size variations based on post count */
.tag-size-1 { font-size: 0.8em; }
.tag-size-2 { font-size: 0.9em; }
.tag-size-3 { font-size: 1em; font-weight: 600; }
.tag-size-4 { font-size: 1.1em; font-weight: 600; }
.tag-size-5 { font-size: 1.2em; font-weight: 700; }

.tag-count {
    color: var(--text-light);
    font-weight: normal;
    font-size: 0.9em;
}

/* Notice blocks */
.notice {
    background-color: #e3f2fd;
    border-left: 4px solid var(--primary-color);
    padding: var(--spacing-md);
    margin: var(--spacing-md) 0;
    border-radius: var(--radius-md);
    font-size: 0.95em;
    color: var(--text-secondary);
}

.notice p {
    margin: 0;
}

.notice strong {
    color: var(--text-primary);
}

/* ===================================
   Search Functionality
   =================================== */

/* Search toggle button */
.search-toggle {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-xs) var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
    font-weight: 500;
}

.search-toggle:hover {
    background-color: var(--bg-secondary);
    color: var(--primary-color);
}

.search-toggle svg {
    stroke-width: 2;
}

/* Dark mode toggle button */
.theme-toggle {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-xs) var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
    font-weight: 500;
}

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

.theme-toggle svg {
    stroke-width: 2;
}

/* Hide/show sun/moon icons based on theme */
.theme-toggle .sun-icon {
    display: none;
}

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

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

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

/* Search modal */
.search-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    z-index: 10000;
    display: none;
    align-items: flex-start;
    justify-content: center;
    padding: 2rem;
    overflow-y: auto;
}

.search-modal.active {
    display: flex;
}

.search-modal-content {
    background-color: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    width: 100%;
    max-width: 700px;
    margin-top: 5vh;
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Search header */
.search-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.search-input {
    flex: 1;
    border: none;
    outline: none;
    font-size: 1.125rem;
    color: var(--text-primary);
    background: transparent;
    font-family: var(--font-sans);
}

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

.search-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

.search-close:hover {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

/* Search results */
.search-results {
    max-height: 60vh;
    overflow-y: auto;
    padding: 1rem;
}

.search-hint,
.search-no-results {
    text-align: center;
    padding: 3rem 2rem;
    color: var(--text-light);
    font-size: 0.95rem;
}

.search-results-count {
    padding: 0.5rem 1rem;
    color: var(--text-light);
    font-size: 0.875rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 0.5rem;
}

/* Search result item */
.search-result-item {
    display: block;
    padding: 1rem;
    border-radius: var(--radius-md);
    text-decoration: none;
    color: inherit;
    transition: var(--transition-fast);
    border: 1px solid transparent;
    margin-bottom: 0.5rem;
}

.search-result-item:hover {
    background-color: var(--bg-secondary);
    border-color: var(--border-color);
    transform: translateX(4px);
}

.search-result-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 0.5rem;
}

.search-result-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    line-height: 1.4;
}

.search-result-title mark {
    background-color: #fef08a;
    color: var(--text-primary);
    padding: 0 0.2em;
    border-radius: 2px;
}

.search-result-category {
    background-color: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    white-space: nowrap;
}

.search-result-excerpt {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    margin: 0.5rem 0;
}

.search-result-excerpt mark {
    background-color: #fef08a;
    color: var(--text-primary);
    padding: 0 0.2em;
    border-radius: 2px;
}

.search-result-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.search-tag {
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
}

/* Scrollbar styling for search results */
.search-results::-webkit-scrollbar {
    width: 8px;
}

.search-results::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
}

.search-results::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: var(--radius-md);
}

.search-results::-webkit-scrollbar-thumb:hover {
    background: var(--text-light);
}

/* Mobile responsive */
@media (max-width: 768px) {
    .search-modal {
        padding: 1rem;
    }
    
    .search-modal-content {
        margin-top: 2vh;
    }
    
    .search-header {
        padding: 1rem;
    }
    
    .search-input {
        font-size: 1rem;
    }
    
    .search-results {
        max-height: 70vh;
    }
    
    .search-result-item {
        padding: 0.75rem;
    }
    
    .search-result-header {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .search-result-category {
        align-self: flex-start;
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}