/**
 * Mobile-Responsive CSS for Global E-Commerce Platform
 * Progressive Web App (PWA) enhancements
 */

/* Mobile-First Base Styles */
:root {
    --mobile-breakpoint: 768px;
    --tablet-breakpoint: 1024px;
    --mobile-header-height: 60px;
    --mobile-sidebar-width: 280px;
    --mobile-touch-target: 44px;
    --mobile-spacing: 1rem;
    --mobile-border-radius: 8px;
}

/* PWA Base Styles */
* {
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

input, textarea, [contenteditable] {
    -webkit-user-select: text;
    -moz-user-select: text;
    -ms-user-select: text;
    user-select: text;
}

/* Viewport and Responsive Setup */
html {
    font-size: 14px;
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
}

body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.4;
    color: #333;
    background: #f8f9fa;
    overflow-x: hidden;
    font-size: 14px;
}

/* Mobile Navigation */
.mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--mobile-header-height);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    z-index: 1000;
    align-items: center;
    padding: 0 var(--mobile-spacing);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.mobile-header .logo {
    font-size: 1rem;
    font-weight: 700;
    text-decoration: none;
    color: white;
    flex: 1;
}

.mobile-header .menu-toggle {
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    padding: 0.5rem;
    cursor: pointer;
    border-radius: var(--mobile-border-radius);
    transition: background-color 0.3s ease;
}

.mobile-header .menu-toggle:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.mobile-header .notifications {
    position: relative;
    background: none;
    border: none;
    color: white;
    font-size: 1.25rem;
    padding: 0.5rem;
    cursor: pointer;
    border-radius: var(--mobile-border-radius);
}

.mobile-header .notification-badge {
    position: absolute;
    top: 0;
    right: 0;
    background: #ff4757;
    color: white;
    font-size: 0.75rem;
    padding: 2px 6px;
    border-radius: 10px;
    min-width: 18px;
    text-align: center;
}

/* Mobile Sidebar */
.mobile-sidebar {
    position: fixed;
    top: 0;
    left: -100%;
    width: var(--mobile-sidebar-width);
    height: 100vh;
    background: white;
    z-index: 1001;
    transition: transform 0.3s ease;
    overflow-y: auto;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
}

.mobile-sidebar.active {
    transform: translateX(100%);
}

.mobile-sidebar .sidebar-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: var(--mobile-spacing);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.mobile-sidebar .sidebar-close {
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.25rem;
}

.mobile-sidebar .nav-menu {
    list-style: none;
    margin: 0;
    padding: 0;
}

.mobile-sidebar .nav-item {
    border-bottom: 1px solid #e9ecef;
}

.mobile-sidebar .nav-link {
    display: flex;
    align-items: center;
    padding: var(--mobile-spacing);
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: background-color 0.3s ease;
}

.mobile-sidebar .nav-link:hover {
    background-color: #f8f9fa;
}

.mobile-sidebar .nav-link i {
    width: 24px;
    margin-right: var(--mobile-spacing);
    color: #667eea;
}

/* Mobile Overlay */
.mobile-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.mobile-overlay.active {
    display: block;
    opacity: 1;
}

/* Responsive Grid System */
.mobile-container {
    max-width: 100%;
    margin: 0 auto;
    padding: 0 var(--mobile-spacing);
}

.mobile-row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 calc(-1 * var(--mobile-spacing));
}

.mobile-col {
    flex: 1;
    padding: 0 var(--mobile-spacing);
    margin-bottom: var(--mobile-spacing);
}

.mobile-col-1 { flex: 0 0 8.333333%; }
.mobile-col-2 { flex: 0 0 16.666667%; }
.mobile-col-3 { flex: 0 0 25%; }
.mobile-col-4 { flex: 0 0 33.333333%; }
.mobile-col-6 { flex: 0 0 50%; }
.mobile-col-12 { flex: 0 0 100%; }

/* Mobile Cards */
.mobile-card {
    background: white;
    border-radius: var(--mobile-border-radius);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 0.75rem;
    margin-bottom: 0.75rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.mobile-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.mobile-card-header {
    margin-bottom: var(--mobile-spacing);
    padding-bottom: var(--mobile-spacing);
    border-bottom: 1px solid #e9ecef;
}

.mobile-card-title {
    font-size: 1rem;
    font-weight: 600;
    margin: 0;
    color: #333;
}

.mobile-card-subtitle {
    font-size: 0.75rem;
    color: #6c757d;
    margin: 0.25rem 0 0 0;
}

/* Mobile Forms */
.mobile-form-group {
    margin-bottom: var(--mobile-spacing);
}

.mobile-form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #333;
}

.mobile-form-control {
    width: 100%;
    padding: 0.5rem;
    border: 2px solid #e9ecef;
    border-radius: var(--mobile-border-radius);
    font-size: 0.875rem;
    transition: border-color 0.3s ease;
    min-height: var(--mobile-touch-target);
}

.mobile-form-control:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.mobile-form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 0.5rem center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    padding-right: 2.5rem;
}

/* Mobile Buttons */
.mobile-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: var(--mobile-border-radius);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    min-height: var(--mobile-touch-target);
    gap: 0.5rem;
}

.mobile-btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.mobile-btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.mobile-btn-secondary {
    background: white;
    color: #667eea;
    border: 2px solid #667eea;
}

.mobile-btn-secondary:hover {
    background: #667eea;
    color: white;
}

.mobile-btn-outline {
    background: transparent;
    color: #667eea;
    border: 2px solid #667eea;
}

.mobile-btn-outline:hover {
    background: #667eea;
    color: white;
}

/* Mobile Product Grid */
.mobile-product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: var(--mobile-spacing);
    padding: var(--mobile-spacing);
}

.mobile-product-card {
    background: white;
    border-radius: var(--mobile-border-radius);
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.mobile-product-card:hover {
    transform: translateY(-2px);
}

.mobile-product-image {
    width: 100%;
    height: 120px;
    object-fit: cover;
    background: #f8f9fa;
}

.mobile-product-info {
    padding: var(--mobile-spacing);
}

.mobile-product-title {
    font-size: 0.75rem;
    font-weight: 600;
    margin: 0 0 0.5rem 0;
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

.mobile-product-price {
    font-size: 0.875rem;
    font-weight: 700;
    color: #667eea;
    margin: 0.25rem 0;
}

.mobile-product-company {
    font-size: 0.75rem;
    color: #6c757d;
    margin: 0;
}

/* Mobile Search */
.mobile-search-container {
    padding: var(--mobile-spacing);
    background: white;
    border-bottom: 1px solid #e9ecef;
}

.mobile-search-form {
    display: flex;
    gap: 0.5rem;
}

.mobile-search-input {
    flex: 1;
    padding: 0.75rem;
    border: 2px solid #e9ecef;
    border-radius: var(--mobile-border-radius);
    font-size: 1rem;
}

.mobile-search-btn {
    padding: 0.75rem 1rem;
    background: #667eea;
    color: white;
    border: none;
    border-radius: var(--mobile-border-radius);
    cursor: pointer;
}

/* Mobile Filters */
.mobile-filter-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--mobile-spacing);
    background: white;
    border-bottom: 1px solid #e9ecef;
}

.mobile-filter-panel {
    position: fixed;
    top: var(--mobile-header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: white;
    z-index: 998;
    transform: translateY(100%);
    transition: transform 0.3s ease;
    overflow-y: auto;
}

.mobile-filter-panel.active {
    transform: translateY(0);
}

.mobile-filter-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--mobile-spacing);
    border-bottom: 1px solid #e9ecef;
    background: #f8f9fa;
    position: sticky;
    top: 0;
    z-index: 1;
}

.mobile-filter-content {
    padding: var(--mobile-spacing);
}

/* Mobile Tabs */
.mobile-tabs {
    display: flex;
    background: white;
    border-bottom: 1px solid #e9ecef;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.mobile-tab {
    flex: 1;
    min-width: 120px;
    padding: var(--mobile-spacing);
    text-align: center;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    font-weight: 500;
    color: #6c757d;
    transition: all 0.3s ease;
}

.mobile-tab.active {
    color: #667eea;
    border-bottom-color: #667eea;
}

/* Mobile Pagination */
.mobile-pagination {
    display: flex;
    justify-content: center;
    padding: var(--mobile-spacing);
    gap: 0.5rem;
}

.mobile-page-btn {
    min-width: var(--mobile-touch-target);
    height: var(--mobile-touch-target);
    display: flex;
    align-items: center;
    justify-content: center;
    background: white;
    border: 1px solid #e9ecef;
    border-radius: var(--mobile-border-radius);
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: all 0.3s ease;
}

.mobile-page-btn.active {
    background: #667eea;
    color: white;
    border-color: #667eea;
}

/* Mobile Loading States */
.mobile-skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
    border-radius: var(--mobile-border-radius);
}

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

.mobile-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(102, 126, 234, 0.3);
    border-radius: 50%;
    border-top-color: #667eea;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Mobile Touch Gestures */
.mobile-swipe-container {
    touch-action: pan-y;
    overflow-x: hidden;
}

.mobile-pull-to-refresh {
    position: relative;
    padding-top: 60px;
    margin-top: -60px;
    transition: margin-top 0.3s ease;
}

.mobile-pull-to-refresh.refreshing {
    margin-top: 0;
}

/* Responsive Breakpoints - Same Desktop Layout */
@media (max-width: 767px) {
    /* Keep desktop layout - do not hide desktop elements */
    .desktop-only {
        display: block !important;
    }

    /* Do not show mobile header */
    .mobile-only {
        display: none !important;
    }

    .mobile-header {
        display: none;
    }

    /* Keep main content as desktop */
    .main-content {
        margin-top: 0;
        padding: 0;
    }

    /* Keep desktop typography */
    h1 { font-size: 2.25rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }

    /* Desktop spacing */
    .mobile-section {
        margin-bottom: 2.5rem;
    }
}

@media (min-width: 768px) {
    /* Tablet styles */
    .mobile-header {
        display: none;
    }
    
    .mobile-sidebar {
        display: none;
    }
    
    .mobile-only {
        display: none !important;
    }
    
    .main-content {
        margin-top: 0;
    }
}

/* PWA Specific Styles */
@media (display-mode: standalone) {
    .mobile-header {
        padding-top: env(safe-area-inset-top);
    }
    
    .mobile-header {
        height: calc(var(--mobile-header-height) + env(safe-area-inset-top));
    }
    
    .main-content {
        margin-top: calc(var(--mobile-header-height) + env(safe-area-inset-top));
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    body {
        background: #1a1a1a;
        color: #ffffff;
    }
    
    .mobile-card {
        background: #2d2d2d;
        color: #ffffff;
    }
    
    .mobile-form-control {
        background: #2d2d2d;
        border-color: #404040;
        color: #ffffff;
    }
    
    .mobile-sidebar {
        background: #2d2d2d;
        color: #ffffff;
    }
    
    .mobile-nav-link {
        color: #ffffff;
    }
    
    .mobile-nav-link:hover {
        background-color: #404040;
    }
}

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

/* Focus styles for keyboard navigation */
.mobile-btn:focus,
.mobile-form-control:focus,
.mobile-tab:focus {
    outline: 2px solid #667eea;
    outline-offset: 2px;
}

/* High contrast mode */
@media (prefers-contrast: high) {
    .mobile-btn {
        border: 2px solid currentColor;
    }
    
    .mobile-card {
        border: 1px solid currentColor;
    }
}

/* --- Hero Section Responsive Overrides --- */
.hero-section {
    padding: 2rem 0 1.5rem 0 !important;
    min-height: auto !important;
    height: auto !important;
    overflow: hidden;
}

.hero-grid {
    gap: 1.5rem !important;
    align-items: center;
}

.hero-title {
    font-size: 2.5rem !important;
    line-height: 1.2 !important;
    margin-bottom: 1rem !important;
}

.hero-subtitle {
    font-size: 1.1rem !important;
    margin-bottom: 1.5rem !important;
}

.hero-image-wrapper img {
    max-height: 380px !important;
    width: 100% !important;
    object-fit: contain !important;
    margin: 0 auto;
    display: block;
    border-radius: 12px;
}

/* Tablet */
@media (max-width: 1024px) {
    .hero-section {
        padding: 1.5rem 0 1rem 0 !important;
    }
    .hero-title {
        font-size: 2.2rem !important;
    }
    .hero-image-wrapper img {
        max-height: 320px !important;
    }
}

/* Mobile */
@media (max-width: 768px) {
    .hero-grid {
        grid-template-columns: 1fr !important;
        text-align: center;
    }
    .hero-left, .hero-right {
        width: 100% !important;
    }
    .hero-actions {
        display: flex;
        flex-direction: column;
        gap: 0.8rem;
        align-items: center;
        justify-content: center;
    }
    .hero-actions a {
        width: 100%;
        max-width: 300px;
    }
    .hero-title {
        font-size: 1.8rem !important;
    }
    .hero-subtitle {
        font-size: 1rem !important;
    }
    .hero-image-wrapper img {
        max-height: 250px !important;
    }
    .trust-badges {
        justify-content: center !important;
        flex-wrap: wrap;
        margin-top: 1rem;
    }
}

/* --- Countries & Cities Responsive Grid Fixes --- */
@media (max-width: 992px) {
    .countries-grid-container .row,
    .cities-grid-container .row {
        margin-left: 0 !important;
        margin-right: 0 !important;
    }
    .countries-grid-container .col-3,
    .cities-grid-container .col-3 {
        padding-left: 0.35rem !important;
        padding-right: 0.35rem !important;
        -webkit-flex: 0 0 50% !important;
        -ms-flex: 0 0 50% !important;
        flex: 0 0 50% !important;
        width: 50% !important;
        max-width: 50% !important;
    }
    .country-card,
    .city-card {
        height: auto !important;
        min-height: 170px !important;
        border-radius: 1rem !important;
    }
    .country-content,
    .city-content {
        padding: 0.85rem !important;
        text-align: left !important;
        background: linear-gradient(180deg, transparent 0%, rgba(15, 23, 42, 0.85) 100%) !important;
    }
    .country-name,
    .city-name {
        font-size: 1rem !important;
        white-space: normal !important;
        overflow: hidden !important;
        text-overflow: ellipsis !important;
    }
    .country-count,
    .city-country {
        display: block !important;
        font-size: 0.9rem !important;
        color: #cbd5e1 !important;
    }
}

@media (max-width: 768px) {
    .countries-grid-container .col-3,
    .cities-grid-container .col-3 {
        -webkit-flex: 0 0 100% !important;
        -ms-flex: 0 0 100% !important;
        flex: 0 0 100% !important;
        width: 100% !important;
        max-width: 100% !important;
    }
    .country-card,
    .city-card {
        min-height: 180px !important;
    }
    .country-content,
    .city-content {
        padding: 1rem !important;
    }
    .country-name,
    .city-name {
        font-size: 1.1rem !important;
    }
    .country-count,
    .city-country {
        font-size: 0.95rem !important;
    }
}