/*
Theme Name: WallVerse - Modern Wallpaper Theme
Theme URI: https://wallverse.com
Author: WallVerse Team
Author URI: https://wallverse.com
Description: A modern, dark-themed WordPress theme designed for wallpaper websites. Features glassmorphism design, smooth animations, responsive layout, and full support for images, videos, and GIFs. SEO optimized with advanced filtering and category system.
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.9.1
Requires PHP: 7.4
License: GPL v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: wallverse
Tags: dark, wallpaper, responsive, glassmorphism, modern, seo, videos, animations
*/

/* ================================
   CSS VARIABLES & ROOT
   ================================ */
:root {
  /* Dark Theme Colors */
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-tertiary: #1a1a25;
  --bg-card: rgba(26, 26, 37, 0.7);
  
  /* Glassmorphism */
  --glass-bg: rgba(26, 26, 37, 0.6);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  
  /* Accent Colors */
  --accent-primary: #6366f1;
  --accent-secondary: #8b5cf6;
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  
  /* Text Colors */
  --text-primary: #ffffff;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  
  /* Status Colors */
  --success: #22c55e;
  --warning: #f59e0b;
  --error: #ef4444;
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Z-index layers */
  --z-base: 1;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-modal: 300;
  --z-tooltip: 400;
}

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

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

button {
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
}

ul, ol {
  list-style: none;
}

/* ================================
   UTILITY CLASSES
   ================================ */
.container {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container-narrow {
  max-width: 1200px;
}

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

/* ================================
   GLASSMORPHISM COMPONENTS
   ================================ */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
}

.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--glass-shadow), 0 0 40px rgba(99, 102, 241, 0.15);
}

/* ================================
   NAVIGATION
   ================================ */
.site-header {
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  position: relative;
  z-index: var(--z-sticky);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) 0;
  gap: var(--space-lg);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: var(--accent-gradient);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  -webkit-text-fill-color: initial;
}

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

.nav-menu a {
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: 0.9375rem;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--text-primary);
  background: rgba(99, 102, 241, 0.1);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.search-btn,
.menu-toggle {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.search-btn:hover,
.menu-toggle:hover {
  background: var(--accent-primary);
  color: var(--text-primary);
}

/* Mobile Menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(10, 10, 15, 0.98);
  backdrop-filter: blur(20px);
  z-index: var(--z-modal);
  padding: var(--space-xl);
  flex-direction: column;
  gap: var(--space-lg);
}

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

.mobile-menu-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.mobile-menu-close {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--bg-tertiary);
}

.mobile-nav-menu {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.mobile-nav-menu a {
  padding: var(--space-md);
  font-size: 1.125rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
}

.mobile-nav-menu a:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

/* ================================
   HERO SECTION
   ================================ */
.hero {
  padding: var(--space-3xl) 0;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(ellipse at 30% 20%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
              radial-gradient(ellipse at 70% 80%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--space-lg);
  background: linear-gradient(135deg, #fff 0%, #a1a1aa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Search Box */
.search-box {
  position: relative;
  max-width: 600px;
  margin: 0 auto var(--space-xl);
}

.search-input {
  width: 100%;
  padding: var(--space-md) var(--space-xl);
  padding-left: 3.5rem;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  color: var(--text-primary);
  font-size: 1rem;
  transition: all var(--transition-base);
}

.search-input:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

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

.search-icon {
  position: absolute;
  left: var(--space-lg);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.search-submit {
  position: absolute;
  right: 0.5rem;
  top: 50%;
  transform: translateY(-50%);
  padding: var(--space-sm) var(--space-lg);
  background: var(--accent-gradient);
  color: white;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.875rem;
  transition: opacity var(--transition-fast);
}

.search-submit:hover {
  opacity: 0.9;
}

/* Quick Tags */
.quick-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-sm);
}

.quick-tag {
  padding: var(--space-xs) var(--space-md);
  background: var(--bg-tertiary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.quick-tag:hover {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: white;
}

/* ================================
   SECTION STYLES
   ================================ */
.section {
  padding: var(--space-3xl) 0;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-xl);
  flex-wrap: wrap;
  gap: var(--space-md);
}

.section-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.section-title-icon {
  width: 40px;
  height: 40px;
  background: var(--accent-gradient);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.view-all {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  color: var(--accent-primary);
  font-weight: 500;
  font-size: 0.9375rem;
}

.view-all:hover {
  gap: var(--space-sm);
}

/* ================================
   WALLPAPER GRID
   ================================ */
.wallpaper-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.wallpaper-grid.compact {
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-md);
}

.wallpaper-grid.large {
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
}

/* ================================
   WALLPAPER CARD
   ================================ */
.wallpaper-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-tertiary);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.wallpaper-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10, 10, 15, 0.9) 0%, transparent 50%);
  z-index: 1;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.wallpaper-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4), 0 0 40px rgba(99, 102, 241, 0.1);
}

.wallpaper-card:hover::before {
  opacity: 1;
}

.wallpaper-media {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
}

.wallpaper-media img,
.wallpaper-media video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.wallpaper-card:hover .wallpaper-media img,
.wallpaper-card:hover .wallpaper-media video {
  transform: scale(1.05);
}

/* Media Type Badge */
.media-type {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  padding: var(--space-xs) var(--space-sm);
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  z-index: 2;
}

.media-type.video {
  background: rgba(239, 68, 68, 0.8);
}

.media-type.gif {
  background: rgba(245, 158, 11, 0.8);
}

/* Wallpaper Overlay */
.wallpaper-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--space-md);
  z-index: 2;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.wallpaper-card:hover .wallpaper-overlay {
  opacity: 1;
}

.wallpaper-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.wallpaper-meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

.wallpaper-meta span {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

/* Wallpaper Actions */
.wallpaper-actions {
  position: absolute;
  top: var(--space-sm);
  left: var(--space-sm);
  display: flex;
  gap: var(--space-xs);
  z-index: 2;
  opacity: 0;
  transform: translateY(-10px);
  transition: all var(--transition-base);
}

.wallpaper-card:hover .wallpaper-actions {
  opacity: 1;
  transform: translateY(0);
}

.action-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-md);
  color: white;
  transition: all var(--transition-fast);
}

.action-btn:hover {
  background: var(--accent-primary);
  transform: scale(1.1);
}

/* Download Button */
.download-btn {
  position: absolute;
  bottom: var(--space-md);
  right: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background: var(--accent-gradient);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.875rem;
  color: white;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  z-index: 2;
  opacity: 0;
  transform: translateY(10px);
  transition: all var(--transition-base);
}

.wallpaper-card:hover .download-btn {
  opacity: 1;
  transform: translateY(0);
}

.download-btn:hover {
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
}

/* ================================
   CATEGORIES
   ================================ */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: var(--space-md);
}

.category-card {
  position: relative;
  aspect-ratio: 1;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-tertiary);
  transition: transform var(--transition-base);
}

.category-card:hover {
  transform: scale(1.05);
}

.category-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.7;
  transition: opacity var(--transition-base);
}

.category-card:hover img {
  opacity: 1;
}

.category-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--space-md);
  background: linear-gradient(to top, rgba(10, 10, 15, 0.95) 0%, transparent 60%);
}

.category-name {
  font-size: 1rem;
  font-weight: 600;
}

.category-count {
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

/* ================================
   FILTER SECTION
   ================================ */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  padding: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  min-width: 150px;
}

.filter-label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.filter-select,
.filter-input {
  padding: var(--space-sm) var(--space-md);
  background: var(--bg-tertiary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.9375rem;
  transition: border-color var(--transition-fast);
}

.filter-select:focus,
.filter-input:focus {
  outline: none;
  border-color: var(--accent-primary);
}

.filter-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.filter-tag {
  padding: var(--space-xs) var(--space-md);
  background: var(--bg-tertiary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-tag:hover,
.filter-tag.active {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: white;
}

/* ================================
   SINGLE WALLPAPER PAGE
   ================================ */
.single-wallpaper {
  padding: var(--space-xl) 0 var(--space-3xl);
}

.wallpaper-preview {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--bg-tertiary);
  margin-bottom: var(--space-xl);
}

.wallpaper-preview-media {
  position: relative;
  width: 100%;
  max-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-secondary);
}

.wallpaper-preview-media img,
.wallpaper-preview-media video {
  max-width: 100%;
  max-height: 70vh;
  object-fit: contain;
}

.wallpaper-preview-actions {
  position: absolute;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: var(--space-md);
  padding: var(--space-sm);
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(20px);
  border-radius: var(--radius-full);
}

.preview-action {
  padding: var(--space-sm) var(--space-lg);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.9375rem;
  transition: all var(--transition-fast);
}

.preview-action.primary {
  background: var(--accent-gradient);
  color: white;
}

.preview-action.secondary {
  background: rgba(255, 255, 255, 0.1);
  color: white;
}

.preview-action:hover {
  transform: scale(1.05);
}

/* Wallpaper Info */
.wallpaper-info {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-xl);
}

.wallpaper-details h1 {
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  font-weight: 700;
  margin-bottom: var(--space-md);
}

.wallpaper-description {
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
  line-height: 1.8;
}

/* Info Grid */
.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.info-item {
  padding: var(--space-md);
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
}

.info-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-xs);
}

.info-value {
  font-size: 0.9375rem;
  font-weight: 600;
}

/* Tags */
.wallpaper-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.wallpaper-tag {
  padding: var(--space-xs) var(--space-md);
  background: var(--bg-tertiary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.wallpaper-tag:hover {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: white;
}

/* Sidebar */
.wallpaper-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.sidebar-card {
  padding: var(--space-lg);
  background: var(--bg-tertiary);
  border-radius: var(--radius-lg);
}

.sidebar-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* Author Card */
.author-card {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.author-avatar {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-full);
  object-fit: cover;
}

.author-info h4 {
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.author-info p {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Related Wallpapers */
.related-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.related-item {
  aspect-ratio: 16 / 10;
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
}

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

.related-item:hover img {
  transform: scale(1.05);
}

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

.page-link,
.page-number {
  min-width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 var(--space-md);
  background: var(--bg-tertiary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.page-link:hover,
.page-number:hover {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: white;
}

.page-number.current {
  background: var(--accent-gradient);
  border-color: transparent;
  color: white;
}

/* ================================
   FOOTER
   ================================ */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--glass-border);
  padding: var(--space-3xl) 0 var(--space-xl);
}

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

.footer-brand .logo {
  margin-bottom: var(--space-md);
}

.footer-description {
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
  max-width: 300px;
}

.footer-social {
  display: flex;
  gap: var(--space-sm);
}

.social-link {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.social-link:hover {
  background: var(--accent-primary);
  color: white;
}

.footer-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--space-lg);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

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

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

.footer-bottom {
  padding-top: var(--space-xl);
  border-top: 1px solid var(--glass-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
}

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

.footer-legal {
  display: flex;
  gap: var(--space-lg);
}

.footer-legal a {
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* ================================
   LOADING & SKELETON
   ================================ */
.skeleton {
  background: linear-gradient(90deg, var(--bg-tertiary) 25%, var(--bg-secondary) 50%, var(--bg-tertiary) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: var(--radius-md);
}

@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ================================
   SCROLLBAR
   ================================ */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-primary);
}

/* ================================
   RESPONSIVE DESIGN
   ================================ */
@media (max-width: 1024px) {
  .wallpaper-info {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  
  .menu-toggle {
    display: flex;
  }
  
  .wallpaper-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
  }
  
  .wallpaper-grid.large {
    grid-template-columns: 1fr;
  }
  
  .categories-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  
  .filter-bar {
    flex-direction: column;
  }
  
  .filter-group {
    width: 100%;
  }
  
  .wallpaper-preview-actions {
    flex-wrap: wrap;
    justify-content: center;
    padding: var(--space-sm);
  }
  
  .preview-action {
    padding: var(--space-sm) var(--space-md);
    font-size: 0.875rem;
  }
  
  .related-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-md);
  }
  
  .wallpaper-grid {
    grid-template-columns: 1fr;
  }
  
  .hero {
    padding: var(--space-2xl) 0;
  }
  
  .section {
    padding: var(--space-2xl) 0;
  }
  
  .info-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ================================
   ANIMATIONS
   ================================ */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

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

.animate-slideIn {
  animation: slideIn 0.5s ease forwards;
}

/* Stagger animation delays */
.stagger-1 { animation-delay: 0.1s; }
.stagger-2 { animation-delay: 0.2s; }
.stagger-3 { animation-delay: 0.3s; }
.stagger-4 { animation-delay: 0.4s; }
.stagger-5 { animation-delay: 0.5s; }

/* ================================
   LAZY LOADING
   ================================ */
.lazy-load {
  opacity: 0;
  transition: opacity var(--transition-base);
}

.lazy-load.loaded {
  opacity: 1;
}

/* ================================
   VIDEO STYLES
   ================================ */
video {
  object-fit: cover;
}

video::-webkit-media-controls {
  display: none !important;
}

video::-webkit-media-controls-enclosure {
  display: none !important;
}

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

:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}

/* ================================
   PRINT STYLES
   ================================ */
@media print {
  .site-header,
  .site-footer,
  .wallpaper-actions,
  .download-btn,
  .pagination {
    display: none !important;
  }
  
  body {
    background: white;
    color: black;
  }
}