/*
 * Modern Classifieds Theme
 * Responsive Styles
 * Supports all devices including iPhone SE (320px)
 */

/* ============================================
   Large Desktop (1280px and up)
   ============================================ */
@media (min-width: 1280px) {
  .container {
    padding: 0 var(--spacing-xl);
  }
}

/* ============================================
   Desktop (1024px - 1279px)
   ============================================ */
@media (max-width: 1279px) {
  .footer-grid {
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
  }
  
  .item-page {
    grid-template-columns: 1fr 300px;
  }
}

/* ============================================
   Tablet (768px - 1023px)
   ============================================ */
@media (max-width: 1023px) {
  :root {
    --header-height: 60px;
  }
  
  /* Header */
  .mobile-menu-toggle {
    display: flex;
    order: 3;
  }
  
  .main-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 300px;
    height: 100vh;
    background-color: var(--bg-primary);
    flex-direction: column;
    align-items: stretch;
    padding: calc(var(--header-height) + var(--spacing-lg)) var(--spacing-lg) var(--spacing-lg);
    box-shadow: var(--shadow-xl);
    transition: right var(--transition-base);
    z-index: var(--z-fixed);
    overflow-y: auto;
  }
  
  .main-nav.active {
    right: 0;
  }
  
  .nav-menu {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
  }
  
  .nav-item {
    width: 100%;
  }
  
  .nav-item a {
    width: 100%;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
  }
  
  .nav-item.mobile-only {
    display: block;
  }
  
  .has-dropdown .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-sm);
  }
  
  .theme-toggle {
    order: 1;
    margin-right: auto;
  }
  
  .post-ad-btn {
    width: 100%;
    margin-top: var(--spacing-lg);
  }
  
  .desktop-only {
    display: none !important;
  }
  
  /* Hero */
  .hero-title {
    font-size: var(--font-size-3xl);
  }
  
  .search-box {
    flex-direction: column;
    border-radius: var(--radius-lg);
  }
  
  .search-field {
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }
  
  .search-field:last-of-type {
    border-bottom: none;
  }
  
  .search-btn {
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  }
  
  /* Footer */
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
  }
  
  .footer-section.about {
    grid-column: span 2;
  }
  
  /* Item Page */
  .item-page {
    grid-template-columns: 1fr;
  }
  
  .item-sidebar {
    position: static;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
  }
  
  /* User Layout */
  .user-layout {
    grid-template-columns: 1fr;
  }
  
  .user-sidebar {
    position: static;
  }
  
  .user-menu {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
  }
  
  .user-menu li {
    margin-bottom: 0;
  }
}

/* ============================================
   Mobile Large (480px - 767px)
   ============================================ */
@media (max-width: 767px) {
  :root {
    --spacing-xl: 1.5rem;
    --spacing-2xl: 2rem;
  }
  
  /* Typography */
  h1 { font-size: var(--font-size-2xl); }
  h2 { font-size: var(--font-size-xl); }
  h3 { font-size: var(--font-size-lg); }
  
  .section-title {
    font-size: var(--font-size-xl);
  }
  
  /* Header */
  .logo-img {
    max-height: 35px;
  }
  
  .logo-text {
    font-size: var(--font-size-lg);
  }
  
  /* Hero */
  .hero-section {
    padding: var(--spacing-xl) 0;
  }
  
  .hero-title {
    font-size: var(--font-size-2xl);
  }
  
  .hero-subtitle {
    font-size: var(--font-size-base);
  }
  
  .quick-categories {
    display: none;
  }
  
  /* Content */
  .content-area {
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
  }
  
  /* Listings */
  .listing-card-list {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: var(--spacing-md);
  }
  
  .listing-list .listing-card {
    flex-direction: column;
  }
  
  .listing-list .listing-thumb {
    width: 100%;
    height: auto;
    aspect-ratio: 16/9;
  }
  
  /* Categories */
  .categories-grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  }
  
  /* Item Page */
  .item-sidebar {
    grid-template-columns: 1fr;
  }
  
  .attributes-grid {
    grid-template-columns: 1fr;
  }
  
  /* Footer */
  .footer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .footer-section.about {
    grid-column: auto;
  }
  
  .social-links {
    justify-content: center;
  }
  
  .footer-bottom-content {
    flex-direction: column;
    text-align: center;
  }
  
  /* Mobile Bottom Nav */
  .mobile-bottom-nav {
    display: flex;
  }
  
  .back-to-top {
    bottom: 80px;
  }
  
  body {
    padding-bottom: 70px;
  }
  
  .site-footer {
    padding-bottom: 70px;
  }
  
  /* Utilities */
  .mobile-only {
    display: block !important;
  }
}

/* ============================================
   Mobile Small (375px - 479px) - iPhone 6/7/8/X
   ============================================ */
@media (max-width: 479px) {
  :root {
    --spacing-lg: 1rem;
    --spacing-xl: 1.25rem;
    --font-size-base: 0.9375rem;
  }
  
  .container {
    padding: 0 var(--spacing-md);
  }
  
  /* Header */
  .header-content {
    gap: var(--spacing-sm);
  }
  
  .theme-toggle {
    width: 36px;
    height: 36px;
  }
  
  /* Hero */
  .hero-title {
    font-size: var(--font-size-xl);
  }
  
  .hero-subtitle {
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-lg);
  }
  
  .search-field {
    padding: var(--spacing-sm);
  }
  
  .search-btn {
    padding: var(--spacing-md);
  }
  
  /* Listings */
  .listing-card-list {
    grid-template-columns: 1fr;
  }
  
  .listing-detail {
    padding: var(--spacing-sm);
  }
  
  .listing-basicinfo .title {
    font-size: var(--font-size-sm);
  }
  
  .currency-value {
    font-size: var(--font-size-base);
  }
  
  /* Categories */
  .categories-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
  }
  
  .category-card {
    padding: var(--spacing-sm);
    flex-direction: column;
    text-align: center;
  }
  
  .category-icon {
    width: 40px;
    height: 40px;
    font-size: var(--font-size-lg);
  }
  
  /* Item Page */
  .item-title {
    font-size: var(--font-size-xl);
  }
  
  .item-meta {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  
  .item-thumbnails a {
    width: 60px;
    height: 45px;
  }
  
  .price-card .price {
    font-size: var(--font-size-2xl);
  }
  
  /* Search */
  .search-header {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .search-actions {
    width: 100%;
    justify-content: space-between;
  }
  
  /* User Menu */
  .user-menu {
    flex-direction: column;
  }
  
  .user-menu a {
    padding: var(--spacing-sm);
  }
  
  /* Forms */
  .form-control {
    padding: var(--spacing-sm);
    font-size: var(--font-size-base);
  }
  
  /* Buttons */
  .btn {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
  }
  
  .btn-lg {
    padding: var(--spacing-sm) var(--spacing-lg);
  }
  
  /* Pagination */
  .pagination a,
  .pagination span {
    min-width: 36px;
    height: 36px;
    font-size: var(--font-size-xs);
  }
  
  /* Comments */
  .comment {
    padding: var(--spacing-md);
  }
  
  .comment-avatar {
    width: 32px;
    height: 32px;
  }
}

/* ============================================
   Mobile Extra Small (320px - 374px) - iPhone SE
   ============================================ */
@media (max-width: 374px) {
  :root {
    --spacing-md: 0.75rem;
    --spacing-lg: 0.875rem;
    --font-size-sm: 0.8125rem;
    --font-size-base: 0.875rem;
    --font-size-lg: 1rem;
    --font-size-xl: 1.125rem;
    --font-size-2xl: 1.25rem;
  }
  
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  /* Header */
  .logo-img {
    max-height: 30px;
  }
  
  .logo-text {
    font-size: var(--font-size-base);
  }
  
  .hamburger {
    width: 20px;
  }
  
  .main-nav {
    width: 280px;
  }
  
  /* Hero */
  .hero-section {
    padding: var(--spacing-lg) 0;
  }
  
  .hero-title {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-sm);
  }
  
  .hero-subtitle {
    font-size: var(--font-size-xs);
  }
  
  .search-field input,
  .search-field select {
    font-size: var(--font-size-sm);
  }
  
  .search-btn span {
    display: none;
  }
  
  /* Content */
  .content-area {
    padding: var(--spacing-md);
  }
  
  /* Listings */
  .listing-thumb {
    aspect-ratio: 3/2;
  }
  
  .listing-details {
    flex-direction: column;
    gap: var(--spacing-xs);
  }
  
  .listing-card .desc {
    display: none;
  }
  
  /* Categories */
  .categories-grid {
    grid-template-columns: 1fr;
  }
  
  .category-card {
    flex-direction: row;
    text-align: left;
  }
  
  /* Item Page */
  .item-main {
    padding: var(--spacing-md);
  }
  
  .item-title {
    font-size: var(--font-size-lg);
  }
  
  .price-card,
  .seller-card {
    padding: var(--spacing-md);
  }
  
  .price-card .price {
    font-size: var(--font-size-xl);
  }
  
  /* Footer */
  .footer-main {
    padding: var(--spacing-xl) 0;
  }
  
  .footer-section h4 {
    font-size: var(--font-size-xs);
  }
  
  .footer-section ul a {
    font-size: var(--font-size-xs);
  }
  
  .social-links a {
    width: 36px;
    height: 36px;
  }
  
  /* Mobile Bottom Nav */
  .mobile-bottom-nav .bottom-nav-item {
    font-size: 9px;
  }
  
  .mobile-bottom-nav .bottom-nav-item i {
    font-size: 16px;
  }
  
  .mobile-bottom-nav .bottom-nav-item.post-btn i {
    width: 40px;
    height: 40px;
    margin-top: -18px;
  }
  
  /* Pagination */
  .pagination {
    gap: 2px;
  }
  
  .pagination a,
  .pagination span {
    min-width: 32px;
    height: 32px;
  }
  
  /* User Pages */
  .user-content {
    padding: var(--spacing-md);
  }
  
  /* Sidebar */
  .sidebar {
    padding: var(--spacing-md);
  }
  
  /* Forms */
  .form-group {
    margin-bottom: var(--spacing-md);
  }
  
  /* Buttons */
  .btn {
    padding: var(--spacing-xs) var(--spacing-sm);
  }
  
  .post-ad-btn span {
    display: none;
  }
  
  /* Admin Options */
  .admin-options {
    flex-direction: column;
  }
  
  .admin-options a {
    text-align: center;
  }
}

/* ============================================
   Landscape Mode Adjustments
   ============================================ */
@media (max-height: 500px) and (orientation: landscape) {
  .hero-section {
    padding: var(--spacing-md) 0;
  }
  
  .hero-title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-xs);
  }
  
  .hero-subtitle {
    display: none;
  }
  
  .main-nav {
    padding-top: var(--spacing-lg);
  }
}

/* ============================================
   High DPI / Retina Displays
   ============================================ */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  .logo-img {
    image-rendering: -webkit-optimize-contrast;
  }
}

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

/* ============================================
   Dark Mode Specific Responsive
   ============================================ */
@media (max-width: 767px) {
  html.dark .main-nav {
    border-left: 1px solid var(--border-color);
  }
}

/* ============================================
   Touch Device Optimizations
   ============================================ */
@media (hover: none) and (pointer: coarse) {
  /* Larger touch targets */
  .nav-item a,
  .dropdown-menu li a,
  .user-menu a,
  .category-list a {
    min-height: 44px;
    display: flex;
    align-items: center;
  }
  
  .btn {
    min-height: 44px;
  }
  
  .form-control {
    min-height: 44px;
  }
  
  /* Remove hover effects that don't work on touch */
  .listing-card:hover {
    transform: none;
  }
  
  .listing-card:hover .listing-thumb img {
    transform: none;
  }
  
  /* Active states instead of hover */
  .listing-card:active {
    transform: scale(0.98);
  }
  
  .btn:active {
    transform: scale(0.95);
  }
}

/* ============================================
   Safe Area Insets (Notched Devices)
   ============================================ */
@supports (padding: max(0px)) {
  .site-header {
    padding-left: max(var(--spacing-md), env(safe-area-inset-left));
    padding-right: max(var(--spacing-md), env(safe-area-inset-right));
  }
  
  .mobile-bottom-nav {
    padding-bottom: max(var(--spacing-sm), env(safe-area-inset-bottom));
  }
  
  .container {
    padding-left: max(var(--spacing-md), env(safe-area-inset-left));
    padding-right: max(var(--spacing-md), env(safe-area-inset-right));
  }
}

/* ============================================
   Focus Visible (Keyboard Navigation)
   ============================================ */
@media (scripting: enabled) {
  :focus:not(:focus-visible) {
    outline: none;
  }
  
  :focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
  }
}