/**
 * TechOps Pro - Main CSS
 * 
 * @package TechOps_Pro
 * @version 1.0.0
 */

/* ===================================
   CSS VARIABLES & ROOT
   =================================== */
:root {
    /* Light Mode Colors */
    --color-primary: #0066cc;
    --color-primary-dark: #004c99;
    --color-secondary: #00a86b;
    --color-accent: #ff6b35;
    --color-text: #1a1a2e;
    --color-text-light: #4a4a68;
    --color-text-muted: #6c757d;
    --color-bg: #ffffff;
    --color-bg-alt: #f8f9fa;
    --color-bg-code: #f4f4f5;
    --color-border: #e1e4e8;
    --color-border-light: #eaecef;
    --color-success: #28a745;
    --color-warning: #ffc107;
    --color-error: #dc3545;
    --color-info: #17a2b8;

    /* Terminal Colors */
    --terminal-bg: #1e1e1e;
    --terminal-text: #00ff41;
    --terminal-border: #00ff41;

    /* Typography */
    --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-body: 'Open Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'Fira Code', 'JetBrains Mono', Consolas, monospace;

    /* Font Sizes */
    --fs-xs: 0.75rem;
    --fs-sm: 0.875rem;
    --fs-base: 1rem;
    --fs-lg: 1.125rem;
    --fs-xl: 1.25rem;
    --fs-2xl: 1.5rem;
    --fs-3xl: 1.875rem;
    --fs-4xl: 2.25rem;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;

    /* Layout */
    --container-max: 1200px;
    --sidebar-width: 320px;
    --header-height: 70px;
}

/* Dark Mode */
[data-theme="dark"] {
    --color-primary: #4da3ff;
    --color-primary-dark: #2d8cf0;
    --color-secondary: #00ff41;
    --color-accent: #ff8c61;
    --color-text: #e6edf3;
    --color-text-light: #8b949e;
    --color-text-muted: #6e7681;
    --color-bg: #0d1117;
    --color-bg-alt: #161b22;
    --color-bg-code: #1f2428;
    --color-border: #30363d;
    --color-border-light: #21262d;
}

/* ===================================
   RESET & BASE
   =================================== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-body);
    font-size: var(--fs-base);
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}

/* ===================================
   TYPOGRAPHY
   =================================== */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.3;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: var(--fs-4xl);
}

h2 {
    font-size: var(--fs-3xl);
}

h3 {
    font-size: var(--fs-2xl);
}

h4 {
    font-size: var(--fs-xl);
}

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

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

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

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

.site-wrapper {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.site-content {
    flex: 1;
    padding: var(--spacing-2xl) 0;
}

.content-area {
    display: grid;
    grid-template-columns: 1fr var(--sidebar-width);
    gap: var(--spacing-2xl);
}

.content-area.full-width {
    grid-template-columns: 1fr;
}

/* ===================================
   HEADER
   =================================== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    backdrop-filter: blur(10px);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
}

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

.site-logo {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    border-radius: var(--radius-md);
    color: white;
}

.site-title {
    font-size: var(--fs-xl);
    margin: 0;
}

.site-title a {
    color: var(--color-text);
    text-decoration: none;
}

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

.site-description {
    font-size: var(--fs-sm);
    color: var(--color-text-muted);
    margin: 0;
}

/* Navigation */
.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav-menu a {
    display: block;
    padding: var(--spacing-sm) 0;
    color: var(--color-text);
    font-weight: 500;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width var(--transition-base);
}

.nav-menu a:hover::after,
.nav-menu .current-menu-item a::after {
    width: 100%;
}

.nav-menu a:hover {
    color: var(--color-primary);
    text-decoration: none;
}

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

.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    color: var(--color-text);
    transition: background var(--transition-fast);
}

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

/* Language Switcher */
.language-switcher {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: var(--color-bg-alt);
    padding: var(--spacing-xs);
    border-radius: var(--radius-full);
}

.lang-btn {
    padding: var(--spacing-xs) var(--spacing-sm);
    border: none;
    background: transparent;
    color: var(--color-text-muted);
    font-size: var(--fs-sm);
    font-weight: 500;
    cursor: pointer;
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

.lang-btn.active,
.lang-btn:hover {
    background: var(--color-primary);
    color: white;
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    color: var(--color-text);
}

/* ===================================
   HERO SECTION
   =================================== */
.hero-section {
    text-align: center;
    padding: var(--spacing-2xl) 0;
    margin-bottom: var(--spacing-2xl);
    border-bottom: 1px solid var(--color-border);
}

.hero-title {
    font-size: var(--fs-4xl);
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: var(--fs-lg);
    color: var(--color-text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* ===================================
   POSTS GRID
   =================================== */
.posts-grid {
    display: grid;
    gap: var(--spacing-xl);
}

/* Article Card */
.article-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
}

.article-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.article-thumbnail {
    aspect-ratio: 16/9;
    overflow: hidden;
}

.article-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-base);
}

.article-card:hover .article-thumbnail img {
    transform: scale(1.05);
}

.article-content {
    padding: var(--spacing-lg);
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    font-size: var(--fs-sm);
    color: var(--color-text-muted);
}

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

.article-category {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-primary);
    color: white;
    font-size: var(--fs-xs);
    font-weight: 600;
    text-transform: uppercase;
    border-radius: var(--radius-sm);
}

.article-title {
    font-size: var(--fs-2xl);
    margin-bottom: var(--spacing-sm);
}

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

.article-title a:hover {
    color: var(--color-primary);
    text-decoration: none;
}

.article-excerpt {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
}

.read-more {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-primary);
    font-weight: 600;
}

.read-more svg {
    transition: transform var(--transition-fast);
}

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

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

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

.single-post-title {
    font-size: var(--fs-4xl);
    margin-bottom: var(--spacing-md);
}

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

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

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

.author-avatar {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    overflow: hidden;
}

.author-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Reading Progress */
.reading-progress {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    z-index: 999;
}

/* Post Thumbnail */
.post-thumbnail {
    margin-bottom: var(--spacing-xl);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.post-thumbnail img {
    width: 100%;
    height: auto;
}

/* Post Content */
.post-content {
    font-size: var(--fs-lg);
    line-height: 1.8;
}

.post-content h2 {
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.post-content h3 {
    margin-top: var(--spacing-xl);
}

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

.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-xl) 0;
    padding: var(--spacing-lg);
    padding-left: var(--spacing-xl);
    background: var(--color-bg-alt);
    border-left: 4px solid var(--color-primary);
    border-radius: var(--radius-md);
    font-style: italic;
}

/* Code Blocks */
.post-content code {
    font-family: var(--font-mono);
    font-size: 0.9em;
    padding: 0.2em 0.4em;
    background: var(--color-bg-code);
    border-radius: var(--radius-sm);
    color: var(--color-accent);
}

.post-content pre {
    margin: var(--spacing-lg) 0;
    padding: 0;
    background: var(--terminal-bg);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.post-content pre code {
    display: block;
    padding: var(--spacing-lg);
    background: transparent;
    color: #e6edf3;
    overflow-x: auto;
    font-size: var(--fs-sm);
    line-height: 1.6;
}

/* Code Block Header */
.code-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.code-language {
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    color: var(--terminal-text);
    text-transform: uppercase;
}

.copy-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: var(--radius-sm);
    color: #8b949e;
    font-size: var(--fs-xs);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.copy-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

.copy-btn.copied {
    color: var(--color-success);
}

/* Tables */
.post-content table {
    width: 100%;
    margin: var(--spacing-lg) 0;
    border-collapse: collapse;
    font-size: var(--fs-sm);
}

.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: var(--color-bg-alt);
    font-weight: 600;
}

/* Post Footer */
.post-footer {
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-lg);
}

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

.tags-label {
    font-weight: 600;
    color: var(--color-text-muted);
}

.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.tag-cloud a {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-bg-alt);
    color: var(--color-text);
    font-size: var(--fs-xs);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.tag-cloud a:hover {
    background: var(--color-primary);
    color: white;
    text-decoration: none;
}

/* Share Buttons */
.share-buttons {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.share-label {
    font-weight: 600;
    color: var(--color-text-muted);
}

.share-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    background: var(--color-bg-alt);
    color: var(--color-text);
    transition: all var(--transition-fast);
}

.share-btn:hover {
    transform: translateY(-2px);
}

.share-btn.twitter:hover {
    background: #1da1f2;
    color: white;
}

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

/* Author Box */
.author-box {
    display: flex;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-2xl);
    padding: var(--spacing-xl);
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg);
}

.author-avatar-large {
    flex-shrink: 0;
}

.author-avatar-large img {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-full);
}

.author-info .author-name {
    font-size: var(--fs-lg);
    margin-bottom: var(--spacing-sm);
}

.author-bio {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
}

.author-posts-link {
    font-weight: 600;
}

/* Related Posts */
.related-posts {
    margin-top: var(--spacing-2xl);
}

.related-title {
    margin-bottom: var(--spacing-lg);
}

.related-posts-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.related-post-item {
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.related-thumb img {
    width: 100%;
    height: 150px;
    object-fit: cover;
}

.related-post-item h4 {
    padding: var(--spacing-md);
    margin: 0;
    font-size: var(--fs-sm);
}

.related-post-item h4 a {
    color: var(--color-text);
}

.related-post-item h4 a:hover {
    color: var(--color-primary);
}

.related-date {
    display: block;
    padding: 0 var(--spacing-md) var(--spacing-md);
    font-size: var(--fs-xs);
    color: var(--color-text-muted);
}

/* ===================================
   TOC (Table of Contents)
   =================================== */
.toc-container {
    position: sticky;
    top: calc(var(--header-height) + var(--spacing-xl));
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    max-height: calc(100vh - var(--header-height) - 3rem);
    overflow-y: auto;
    margin-bottom: var(--spacing-xl);
}

.toc-title {
    font-size: var(--fs-sm);
    font-weight: 600;
    text-transform: uppercase;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

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

.toc-nav li {
    margin-bottom: var(--spacing-sm);
}

.toc-nav a {
    display: block;
    padding: var(--spacing-xs) var(--spacing-sm);
    color: var(--color-text-light);
    font-size: var(--fs-sm);
    border-left: 2px solid transparent;
    transition: all var(--transition-fast);
}

.toc-nav a:hover,
.toc-nav a.active {
    color: var(--color-primary);
    border-left-color: var(--color-primary);
    background: rgba(0, 102, 204, 0.05);
    text-decoration: none;
}

.toc-nav .toc-h3 a {
    padding-left: var(--spacing-lg);
}

.toc-nav .toc-h4 a {
    padding-left: var(--spacing-xl);
}

/* ===================================
   BREADCRUMBS
   =================================== */
.breadcrumbs {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) 0;
    font-size: var(--fs-sm);
    color: var(--color-text-muted);
}

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

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

.breadcrumbs .separator {
    color: var(--color-border);
}

.breadcrumbs .current {
    color: var(--color-text);
    font-weight: 500;
}

/* ===================================
   SIDEBAR & WIDGETS
   =================================== */
.sidebar {
    width: var(--sidebar-width);
}

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

.widget-title {
    font-size: var(--fs-lg);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--color-primary);
}

/* Search Form */
.search-form {
    display: flex;
    gap: var(--spacing-sm);
}

.search-field {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg);
    color: var(--color-text);
    font-size: var(--fs-sm);
}

.search-field:focus {
    outline: none;
    border-color: var(--color-primary);
}

.search-submit {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
}

.search-submit:hover {
    background: var(--color-primary-dark);
}

/* Recent Posts Widget */
.recent-post-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-border-light);
}

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

.recent-post-thumb {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    flex-shrink: 0;
}

.recent-post-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.recent-post-content h4 {
    font-size: var(--fs-sm);
    margin-bottom: var(--spacing-xs);
    line-height: 1.4;
}

.recent-post-content a {
    color: var(--color-text);
}

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

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

/* ===================================
   PAGINATION
   =================================== */
.pagination,
.nav-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-2xl);
}

.pagination a,
.pagination span,
.page-numbers {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 var(--spacing-md);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.pagination a:hover,
.page-numbers:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
    text-decoration: none;
}

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

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

.comments-title {
    font-size: var(--fs-2xl);
    margin-bottom: var(--spacing-xl);
}

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

.comment {
    padding: var(--spacing-lg);
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
}

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

.comment-author-avatar img {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
}

.comment-author-name {
    font-weight: 600;
}

.comment-date {
    font-size: var(--fs-sm);
    color: var(--color-text-muted);
}

.comment-content {
    color: var(--color-text-light);
}

.comment-reply-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-md);
    font-size: var(--fs-sm);
    color: var(--color-primary);
}

/* Comment Form */
.comment-respond {
    margin-top: var(--spacing-2xl);
}

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

.comment-form input[type="text"],
.comment-form input[type="email"],
.comment-form input[type="url"],
.comment-form textarea {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg);
    color: var(--color-text);
    font-family: inherit;
    font-size: var(--fs-base);
}

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

.comment-form textarea {
    min-height: 150px;
    resize: vertical;
}

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

.submit {
    padding: var(--spacing-sm) var(--spacing-xl);
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
}

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

/* ===================================
   FOOTER
   =================================== */
.site-footer {
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-2xl) 0;
}

.footer-widgets {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-widget-title {
    font-size: var(--fs-lg);
    margin-bottom: var(--spacing-md);
}

.footer-widget ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-widget li {
    margin-bottom: var(--spacing-sm);
}

.footer-widget a {
    color: var(--color-text-light);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
    font-size: var(--fs-sm);
    color: var(--color-text-muted);
}

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

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--color-bg);
    border-radius: var(--radius-full);
    color: var(--color-text);
    transition: all var(--transition-fast);
}

.social-links a:hover {
    background: var(--color-primary);
    color: white;
}

.social-links svg {
    width: 18px;
    height: 18px;
}

/* ===================================
   404 PAGE
   =================================== */
.error-404 {
    text-align: center;
    padding: var(--spacing-2xl) 0;
}

.error-code {
    font-size: 8rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: var(--spacing-md);
}

.error-message {
    font-size: var(--fs-2xl);
    margin-bottom: var(--spacing-md);
}

.error-description {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xl);
}

.error-actions {
    margin-bottom: var(--spacing-2xl);
}

.error-search {
    max-width: 400px;
    margin: 0 auto var(--spacing-2xl);
}

.error-popular {
    margin-top: var(--spacing-2xl);
}

.popular-posts-list {
    list-style: none;
    padding: 0;
    display: inline-block;
    text-align: left;
}

.popular-posts-list li {
    margin-bottom: var(--spacing-sm);
}

/* ===================================
   ARCHIVE HEADER
   =================================== */
.archive-header {
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--color-border);
}

.archive-title {
    margin-bottom: var(--spacing-sm);
}

.archive-description {
    color: var(--color-text-light);
}

/* ===================================
   SEARCH HEADER
   =================================== */
.search-header {
    margin-bottom: var(--spacing-2xl);
}

.search-title {
    margin-bottom: var(--spacing-lg);
}

.search-query {
    color: var(--color-primary);
}

.results-count {
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-muted);
}

.search-form-container {
    max-width: 500px;
}

.no-results {
    text-align: center;
    padding: var(--spacing-2xl);
}

.no-results .search-form-container {
    margin: var(--spacing-xl) auto 0;
}

/* ===================================
   BUTTONS
   =================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

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

/* ===================================
   UTILITIES
   =================================== */
.screen-reader-text {
    clip: rect(1px, 1px, 1px, 1px);
    position: absolute;
    height: 1px;
    width: 1px;
    overflow: hidden;
}

/* ===================================
   RESPONSIVE
   =================================== */
@media (max-width: 1024px) {
    :root {
        --sidebar-width: 280px;
    }

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

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

@media (max-width: 768px) {
    :root {
        --fs-4xl: 2rem;
        --fs-3xl: 1.5rem;
    }

    .content-area {
        grid-template-columns: 1fr;
    }

    .sidebar {
        width: 100%;
    }

    .nav-menu {
        display: none;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .header-inner {
        flex-wrap: wrap;
    }

    .footer-widgets {
        grid-template-columns: 1fr;
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }

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

    .toc-container {
        position: relative;
        top: 0;
        max-height: none;
    }

    .author-box {
        flex-direction: column;
        text-align: center;
    }

    .post-footer {
        flex-direction: column;
        align-items: flex-start;
    }

    .error-code {
        font-size: 5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }

    .article-content,
    .widget {
        padding: var(--spacing-md);
    }
}

/* ===================================
   PRINT
   =================================== */
@media print {

    .site-header,
    .site-footer,
    .sidebar,
    .toc-container,
    .comments-area,
    .reading-progress,
    .share-buttons {
        display: none !important;
    }

    .content-area {
        grid-template-columns: 1fr;
    }

    body {
        color: #000;
        background: #fff;
    }
}