/* Responsive Design */

/* Large Desktop */
@media (min-width: 1400px) {
  .container {
    max-width: 1320px;
  }
  
  .hero-title {
    font-size: 3.5rem;
  }
  
  .posts-grid {
    grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
  }
  
  .featured-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Desktop */
@media (max-width: 1199px) {
  .main-layout {
    grid-template-columns: 1fr 280px;
    gap: var(--spacing-xl);
  }
  
  .posts-grid {
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  }
}

/* Tablet Large */
@media (max-width: 1023px) {
  .container {
    padding: 0 var(--spacing-lg);
  }
  
  .main-layout {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }
  
  .sidebar {
    position: static;
    grid-row: 2;
  }
  
  .nav-list {
    gap: var(--spacing-base);
  }
  
  .hero-title {
    font-size: var(--font-size-3xl);
  }
  
  .hero-search {
    max-width: 400px;
  }
  
  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-base);
  }
  
  .filter-tabs {
    flex-wrap: wrap;
  }
  
  .posts-grid {
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-base);
  }
  
  .featured-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-base);
  }
}

/* Tablet */
@media (max-width: 768px) {
  :root {
    --header-height: 56px;
  }
  
  .container {
    padding: 0 var(--spacing-base);
  }
  
  .nav-menu {
    display: none;
  }
  
  .mobile-menu-toggle {
    display: flex;
  }
  
  .nav-actions {
    gap: var(--spacing-sm);
  }
  
  .auth-buttons {
    display: none;
  }
  
  .hero-section {
    padding: var(--spacing-2xl) 0;
  }
  
  .hero-title {
    font-size: var(--font-size-2xl);
  }
  
  .hero-subtitle {
    font-size: var(--font-size-base);
  }
  
  .hero-search {
    max-width: 100%;
    flex-direction: column;
    padding: var(--spacing-sm);
    gap: var(--spacing-sm);
  }
  
  .search-input {
    padding: var(--spacing-sm);
  }
  
  .search-btn {
    width: 100%;
    padding: var(--spacing-sm);
  }
  
  .section-title {
    font-size: var(--font-size-xl);
  }
  
  .posts-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-base);
  }
  
  .featured-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-base);
  }
  
  .post-content {
    padding: var(--spacing-base);
  }
  
  .sidebar {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-base);
  }
  
  .sidebar-widget {
    margin-bottom: 0;
  }
  
  /* Mobile Navigation */
  .nav-menu.mobile-open {
    display: block;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--background);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-base) 0;
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease;
  }
  
  .nav-list {
    flex-direction: column;
    gap: 0;
    padding: 0 var(--spacing-base);
  }
  
  .nav-link {
    display: block;
    padding: var(--spacing-base);
    border-bottom: 1px solid var(--border-color);
  }
  
  .nav-link:last-child {
    border-bottom: none;
  }
  
  .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    background: var(--hover-bg);
    margin: var(--spacing-sm) 0;
  }
  
  /* Mobile User Menu */
  .user-dropdown {
    left: 0;
    right: 0;
    min-width: auto;
  }
}

/* Mobile Large */
@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .hero-section {
    padding: var(--spacing-xl) 0;
  }
  
  .hero-title {
    font-size: var(--font-size-xl);
  }
  
  .section-title {
    font-size: var(--font-size-lg);
  }
  
  .filter-tabs {
    justify-content: center;
  }
  
  .filter-tab {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-xs);
  }
  
  .post-card {
    border-radius: var(--radius-base);
  }
  
  .post-content {
    padding: var(--spacing-sm);
  }
  
  .post-title {
    font-size: var(--font-size-base);
  }
  
  .post-excerpt {
    font-size: var(--font-size-sm);
  }
  
  .post-footer {
    flex-direction: column;
    gap: var(--spacing-sm);
    align-items: flex-start;
  }
  
  .sidebar {
    grid-template-columns: 1fr;
  }
  
  .sidebar-widget {
    padding: var(--spacing-base);
  }
  
  .newsletter-form {
    gap: var(--spacing-base);
  }
  
  .trending-item {
    padding: var(--spacing-sm);
  }
  
  .trending-image {
    width: 50px;
    height: 50px;
  }
  
  .trending-title {
    font-size: var(--font-size-xs);
  }
  
  .category-item {
    padding: var(--spacing-sm);
  }
  
  .widget-title {
    font-size: var(--font-size-base);
  }
}

/* Mobile Small */
@media (max-width: 320px) {
  .logo span {
    display: none;
  }
  
  .hero-title {
    font-size: var(--font-size-lg);
  }
  
  .hero-search {
    padding: var(--spacing-xs);
  }
  
  .btn {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-xs);
  }
  
  .section-title {
    font-size: var(--font-size-base);
  }
  
  .post-title {
    font-size: var(--font-size-sm);
  }
  
  .widget-title {
    font-size: var(--font-size-sm);
  }
}

/* Landscape Tablets */
@media (max-width: 1024px) and (orientation: landscape) {
  .hero-section {
    padding: var(--spacing-xl) 0;
  }
  
  .main-layout {
    margin-top: var(--spacing-base);
  }
  
  .posts-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }
}

/* High DPI Displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  .post-image,
  .trending-image,
  .user-avatar img {
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
  }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  
  .post-card:hover {
    transform: none;
  }
  
  .hero-search {
    animation: none;
  }
}

/* High Contrast */
@media (prefers-contrast: high) {
  :root {
    --border-color: #000000;
    --text-secondary: #000000;
    --shadow-base: 0 2px 8px rgba(0, 0, 0, 0.8);
  }
  
  [data-theme="dark"] {
    --border-color: #ffffff;
    --text-secondary: #ffffff;
  }
  
  .btn {
    border-width: 2px;
  }
  
  .post-card {
    border-width: 2px;
  }
}

/* Dark Theme Responsive Adjustments */
@media (max-width: 768px) {
  [data-theme="dark"] {
    --surface: #1a1a1a;
  }
  
  [data-theme="dark"] .hero-section {
    background: linear-gradient(135deg, #1a73e8 0%, #137333 100%);
  }
}

/* PWA Responsive Adjustments */
@media (display-mode: standalone) {
  .header {
    padding-top: env(safe-area-inset-top);
  }
  
  .main-content {
    padding-top: calc(var(--header-height) + env(safe-area-inset-top));
  }
  
  .container {
    padding-left: max(var(--spacing-base), env(safe-area-inset-left));
    padding-right: max(var(--spacing-base), env(safe-area-inset-right));
  }
}

/* Fold Detection */
@media (max-height: 600px) {
  .hero-section {
    padding: var(--spacing-lg) 0;
  }
  
  .hero-title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
  }
  
  .hero-subtitle {
    margin-bottom: var(--spacing-base);
  }
}

/* Ultra Wide Displays */
@media (min-width: 1920px) {
  .container {
    max-width: 1600px;
  }
  
  .main-layout {
    grid-template-columns: 1fr 350px;
    gap: var(--spacing-3xl);
  }
  
  .posts-grid {
    grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
    gap: var(--spacing-xl);
  }
  
  .featured-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Print Responsive */
@media print and (max-width: 8.5in) {
  .posts-grid {
    grid-template-columns: 1fr;
  }
  
  .post-card {
    margin-bottom: 15px;
    padding: 10px;
  }
  
  .post-title {
    font-size: 14px;
  }
  
  .post-excerpt {
    font-size: 12px;
  }
}