/* ==========================================================================
   데일리인사이트 - 디자인 시스템
   ========================================================================== */

/* ---------- CSS Variables ---------- */
:root {
  /* Colors */
  --color-primary: #6366f1;
  --color-primary-light: #818cf8;
  --color-primary-dark: #4f46e5;
  --color-accent: #8b5cf6;
  --color-accent-light: #a78bfa;

  --color-bg: #f8fafc;
  --color-bg-secondary: #ffffff;
  --color-bg-card: #ffffff;
  --color-bg-hero: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a78bfa 100%);

  --color-text: #1e293b;
  --color-text-secondary: #64748b;
  --color-text-muted: #94a3b8;
  --color-text-inverse: #ffffff;

  --color-border: #e2e8f0;
  --color-border-light: #f1f5f9;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.15);

  /* Typography */
  --font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-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;
  --spacing-3xl: 4rem;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Layout */
  --container-max: 1200px;
  --sidebar-width: 320px;
  --header-height: 64px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;
}

/* ---------- Dark Mode ---------- */
[data-theme="dark"] {
  --color-bg: #0f172a;
  --color-bg-secondary: #1e293b;
  --color-bg-card: #1e293b;
  --color-bg-hero: linear-gradient(135deg, #312e81 0%, #4c1d95 50%, #6d28d9 100%);

  --color-text: #f1f5f9;
  --color-text-secondary: #94a3b8;
  --color-text-muted: #64748b;

  --color-border: #334155;
  --color-border-light: #1e293b;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.25);
}

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

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

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

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

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

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

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

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

.header-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-weight: 700;
  font-size: var(--font-size-lg);
  color: var(--color-text);
  transition: color var(--transition-fast);
}

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

.site-name {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

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

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
  background: rgba(99, 102, 241, 0.08);
}

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

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: none;
  background: transparent;
  color: var(--color-text-secondary);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  background: rgba(99, 102, 241, 0.08);
  color: var(--color-primary);
}

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

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  border: none;
  background: transparent;
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-sm);
}

.hamburger-line {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero {
  background: var(--color-bg-hero);
  padding: var(--spacing-3xl) var(--spacing-lg);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 700px;
  margin: 0 auto;
}

.hero-title {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  color: var(--color-text-inverse);
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  color: rgba(255, 255, 255, 0.85);
  font-weight: 300;
  line-height: 1.6;
}

/* Hero Decorations */
.hero-decoration {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-circle {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
}

.hero-circle-1 {
  width: 300px;
  height: 300px;
  top: -80px;
  right: -60px;
  animation: float 8s ease-in-out infinite;
}

.hero-circle-2 {
  width: 200px;
  height: 200px;
  bottom: -40px;
  left: -40px;
  animation: float 6s ease-in-out infinite reverse;
}

.hero-circle-3 {
  width: 120px;
  height: 120px;
  top: 50%;
  left: 60%;
  animation: float 10s ease-in-out infinite 2s;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-20px); }
}

/* ==========================================================================
   CATEGORIES SECTION
   ========================================================================== */
.categories-section {
  padding: var(--spacing-2xl) 0;
  background: var(--color-bg);
}

.categories-grid {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

.category-card {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  color: var(--color-text);
  font-weight: 500;
  font-size: var(--font-size-sm);
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.category-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-light);
  color: var(--color-primary);
}

.category-icon {
  font-size: var(--font-size-xl);
}

/* ==========================================================================
   CONTENT + SIDEBAR LAYOUT
   ========================================================================== */
.content-with-sidebar {
  display: grid;
  grid-template-columns: 1fr var(--sidebar-width);
  gap: var(--spacing-2xl);
  align-items: start;
}

.latest-posts {
  padding: var(--spacing-2xl) 0 var(--spacing-3xl);
}

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

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

.post-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.post-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-primary-light);
}

.post-card-link {
  display: block;
  color: var(--color-text);
}

.post-card-link:hover {
  color: var(--color-text);
}

.post-card-image {
  width: 100%;
  height: 180px;
  overflow: hidden;
  background: linear-gradient(135deg, #e2e8f0, #f1f5f9);
}

.post-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.post-card:hover .post-card-image img {
  transform: scale(1.05);
}

.post-card-image-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
}

.placeholder-icon {
  font-size: 2.5rem;
  opacity: 0.7;
}

.post-card-body {
  padding: var(--spacing-lg);
}

.post-card-category {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-primary);
  background: rgba(99, 102, 241, 0.08);
  padding: 2px 10px;
  border-radius: var(--radius-full);
  margin-bottom: var(--spacing-sm);
  text-transform: uppercase;
}

.post-card-title {
  font-size: var(--font-size-base);
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: var(--spacing-sm);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-card-excerpt {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: var(--spacing-md);
}

.post-card-meta {
  display: flex;
  justify-content: space-between;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.reading-time {
  color: var(--color-primary-light);
}

/* ==========================================================================
   SIDEBAR
   ========================================================================== */
.sidebar {
  position: sticky;
  top: calc(var(--header-height) + var(--spacing-lg));
}

.sidebar-widget {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
}

.ad-widget {
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.ad-placeholder {
  width: 100%;
  text-align: center;
}

.ad-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  padding: var(--spacing-2xl) var(--spacing-md);
  background: var(--color-border-light);
  border-radius: var(--radius-md);
  border: 1px dashed var(--color-border);
}

.widget-title {
  font-size: var(--font-size-base);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--color-primary);
  color: var(--color-text);
}

.popular-posts-list {
  list-style: none;
}

.popular-post-item {
  border-bottom: 1px solid var(--color-border-light);
}

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

.popular-post-item a {
  display: flex;
  flex-direction: column;
  padding: var(--spacing-sm) 0;
  color: var(--color-text);
  transition: color var(--transition-fast);
}

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

.popular-post-title {
  font-size: var(--font-size-sm);
  font-weight: 500;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.popular-post-date {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: 2px;
}

/* ==========================================================================
   POST ARTICLE (Single Post Page)
   ========================================================================== */
.post-article {
  padding: var(--spacing-2xl) 0;
}

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

.post-category-badge {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-text-inverse);
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  padding: 4px 14px;
  border-radius: var(--radius-full);
}

.post-date,
.post-reading-time {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.post-title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.01em;
}

.post-description {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: var(--spacing-xl);
}

.post-featured-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: var(--spacing-xl);
  box-shadow: var(--shadow-md);
}

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

/* Table of Contents */
.table-of-contents {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.toc-title {
  font-size: var(--font-size-base);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
}

.table-of-contents nav,
.table-of-contents #TableOfContents {
  font-size: var(--font-size-sm);
}

.table-of-contents ul {
  list-style: none;
  padding-left: var(--spacing-md);
}

.table-of-contents > nav > ul,
.table-of-contents > #TableOfContents > ul {
  padding-left: 0;
}

.table-of-contents li {
  margin-bottom: var(--spacing-xs);
}

.table-of-contents a {
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.table-of-contents a:hover {
  color: var(--color-primary);
}

/* Prose (Article Body) */
.prose {
  font-size: var(--font-size-base);
  line-height: 1.8;
  color: var(--color-text);
}

.prose h2 {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin: var(--spacing-2xl) 0 var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--color-border-light);
}

.prose h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin: var(--spacing-xl) 0 var(--spacing-md);
}

.prose h4 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin: var(--spacing-lg) 0 var(--spacing-sm);
}

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

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

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

.prose blockquote {
  border-left: 4px solid var(--color-primary);
  padding: var(--spacing-md) var(--spacing-lg);
  margin: var(--spacing-lg) 0;
  background: rgba(99, 102, 241, 0.05);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--color-text-secondary);
  font-style: italic;
}

.prose code {
  background: var(--color-bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
  border: 1px solid var(--color-border);
}

.prose pre {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  overflow-x: auto;
  margin: var(--spacing-lg) 0;
}

.prose pre code {
  background: none;
  border: none;
  padding: 0;
}

.prose img {
  border-radius: var(--radius-md);
  margin: var(--spacing-lg) 0;
  box-shadow: var(--shadow-md);
}

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

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

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

/* Post Tags */
.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin: var(--spacing-xl) 0;
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border);
}

.tag-link {
  display: inline-block;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  background: var(--color-bg);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  transition: all var(--transition-fast);
}

.tag-link:hover {
  color: var(--color-primary);
  border-color: var(--color-primary-light);
  background: rgba(99, 102, 241, 0.05);
}

/* Share Buttons */
.share-buttons {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin: var(--spacing-xl) 0;
}

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

.share-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 700;
  border: 1px solid var(--color-border);
  background: var(--color-bg-card);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

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

.share-facebook:hover {
  background: #4267B2;
  color: white;
  border-color: #4267B2;
}

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

/* Related Posts */
.related-posts {
  margin-top: var(--spacing-2xl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--color-border);
}

.related-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--spacing-md);
}

.related-card {
  display: block;
  padding: var(--spacing-lg);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  transition: all var(--transition-fast);
}

.related-card:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-md);
  color: var(--color-primary);
}

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

.related-card-date {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* ==========================================================================
   PAGE CONTENT (Static Pages)
   ========================================================================== */
.page-content {
  padding: var(--spacing-2xl) 0 var(--spacing-3xl);
  max-width: 800px;
  margin: 0 auto;
}

.page-header {
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.page-title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
}

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

/* ==========================================================================
   PAGINATION
   ========================================================================== */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-2xl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--color-border);
}

.pagination-link {
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text);
  transition: all var(--transition-fast);
}

.pagination-link:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.pagination-info {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

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

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

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-weight: 700;
  font-size: var(--font-size-lg);
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
}

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

.footer-description {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.footer-heading {
  font-size: var(--font-size-sm);
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-md);
  letter-spacing: 0.05em;
}

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

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

.footer-links a {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width: 1024px) {
  .content-with-sidebar {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
  }

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

@media (max-width: 768px) {
  :root {
    --font-size-4xl: 1.75rem;
    --font-size-3xl: 1.5rem;
    --font-size-2xl: 1.25rem;
  }

  .main-nav {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg-secondary);
    z-index: 999;
    padding: var(--spacing-lg);
  }

  .main-nav.active {
    display: block;
  }

  .main-nav .nav-list {
    flex-direction: column;
    gap: var(--spacing-xs);
  }

  .main-nav .nav-link {
    font-size: var(--font-size-lg);
    padding: var(--spacing-md);
  }

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

  .hero {
    padding: var(--spacing-2xl) var(--spacing-md);
  }

  .categories-grid {
    gap: var(--spacing-sm);
  }

  .category-card {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-xs);
  }

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }

  .sidebar {
    grid-template-columns: 1fr;
  }

  .share-buttons {
    flex-wrap: wrap;
  }

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