/* ============================================
   MODERN UI - Dubizzle Inspired Design
   ============================================ */

:root {
    /* Color Palette - Modern & Clean */
    --primary-color: #002f34;
    --primary-hover: #004852;
    --secondary-color: #23e5db;
    --accent-color: #ff6b35;
    --success-color: #00a49f;
    --warning-color: #ffa726;
    --danger-color: #ef5350;
    
    /* Neutral Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f5f7fa;
    --bg-hover: #f0f2f5;
    --text-primary: #002f34;
    --text-secondary: #406367;
    --text-muted: #7f9799;
    --border-color: #e8ebed;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 47, 52, 0.08);
    --shadow-md: 0 4px 8px rgba(0, 47, 52, 0.12);
    --shadow-lg: 0 8px 16px rgba(0, 47, 52, 0.16);
    --shadow-hover: 0 4px 12px rgba(0, 47, 52, 0.2);
    
    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-md: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 24px;
    --font-size-xxl: 32px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */

* {
    box-sizing: border-box;
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-md);
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    margin: 0;
    padding: 0;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   MODERN HEADER
   ============================================ */

.modern-header {
    background: var(--bg-primary);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
}

.modern-header-top {
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-sm) 0;
}

.modern-header-main {
    padding: var(--spacing-md) 0;
}

.modern-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.modern-header-flex {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
}

/* Logo */
.modern-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary-color);
    white-space: nowrap;
}

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

/* Search Bar */
.modern-search-container {
    flex: 1;
    max-width: 600px;
}

.modern-search-bar {
    display: flex;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all var(--transition-fast);
}

.modern-search-bar:focus-within {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.modern-search-input {
    flex: 1;
    border: none;
    background: transparent;
    padding: var(--spacing-md) var(--spacing-md);
    font-size: var(--font-size-md);
    color: var(--text-primary);
    outline: none;
}

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

.modern-search-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0 var(--spacing-xl);
    cursor: pointer;
    font-weight: 600;
    transition: background var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.modern-search-btn:hover {
    background: var(--primary-hover);
}

/* Post Ad Button */
.modern-btn-post {
    background: var(--accent-color);
    color: white;
    border: none;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: var(--font-size-md);
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.modern-btn-post:hover {
    background: #ff5722;
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

/* User Menu */
.modern-user-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

/* Modern User Link */
.modern-user-link {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-primary);
    text-decoration: none;
    padding: 8px 12px;
    border-radius: 8px;
    transition: background-color 0.3s ease;
    cursor: pointer;
}

.modern-user-link:hover {
    background-color: var(--background-secondary);
    color: var(--text-primary);
    text-decoration: none;
}

/* User Dropdown Menu */
.modern-user-dropdown {
    position: relative;
}

.modern-user-dropdown-menu {
    display: none;
    position: absolute;
    right: 0;
    top: 100%;
    margin-top: 8px;
    background: white;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    z-index: 1000;
    animation: fadeInDown 0.2s ease;
}

.modern-user-dropdown-menu.show {
    display: block !important;
}

.modern-user-dropdown-menu a {
    display: block;
    padding: 12px 20px;
    color: var(--text-primary);
    text-decoration: none;
    transition: background-color 0.2s ease;
    border-bottom: 1px solid var(--border-color);
}

.modern-user-dropdown-menu a:last-child {
    border-bottom: none;
}

.modern-user-dropdown-menu a:hover {
    background-color: var(--background-secondary);
}

.modern-user-dropdown-menu a i {
    margin-right: 8px;
    width: 20px;
    text-align: center;
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   HERO SECTION
   ============================================ */

.modern-hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
    color: white;
    padding: var(--spacing-xxl) 0;
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.modern-hero h1 {
    font-size: var(--font-size-xxl);
    margin: 0 0 var(--spacing-md) 0;
    font-weight: 700;
}

.modern-hero p {
    font-size: var(--font-size-lg);
    margin: 0;
    opacity: 0.9;
}

/* ============================================
   CATEGORIES SECTION
   ============================================ */

.modern-section {
    background: var(--bg-primary);
    padding: var(--spacing-xl) 0;
    margin-bottom: var(--spacing-lg);
}

.modern-section-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 var(--spacing-lg) 0;
}

.modern-categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.modern-category-card {
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    text-decoration: none;
    color: var(--text-primary);
    transition: all var(--transition-fast);
    cursor: pointer;
}

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

.modern-category-icon {
    font-size: 40px;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-color);
}

.modern-category-name {
    font-weight: 600;
    font-size: var(--font-size-md);
    margin-bottom: var(--spacing-xs);
}

.modern-category-count {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

/* ============================================
   ITEM CARDS - Dubizzle Style
   ============================================ */

.modern-items-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.modern-item-card {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    display: block;
}

.modern-item-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.modern-item-image-container {
    position: relative;
    width: 100%;
    padding-bottom: 75%; /* 4:3 Aspect Ratio */
    background: var(--bg-secondary);
    overflow: hidden;
}

.modern-item-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.modern-item-card:hover .modern-item-image {
    transform: scale(1.05);
}

.modern-item-badges {
    position: absolute;
    top: var(--spacing-sm);
    left: var(--spacing-sm);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.modern-badge {
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
}

.modern-badge-urgent {
    background: var(--danger-color);
    color: white;
}

.modern-badge-featured {
    background: var(--warning-color);
    color: white;
}

.modern-item-favorite {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background: white;
    border: none;
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-fast);
    color: var(--text-muted);
}

.modern-item-favorite:hover {
    transform: scale(1.1);
    color: var(--danger-color);
}

.modern-item-favorite.active {
    color: var(--danger-color);
}

.modern-item-content {
    padding: var(--spacing-md);
}

.modern-item-title {
    font-size: var(--font-size-md);
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 var(--spacing-sm) 0;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    line-height: 1.4;
}

.modern-item-price {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--success-color);
    margin-bottom: var(--spacing-sm);
}

.modern-item-location {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-xs);
}

.modern-item-time {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

/* ============================================
   BUTTONS
   ============================================ */

.modern-btn {
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: var(--font-size-md);
    cursor: pointer;
    border: none;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    text-decoration: none;
}

.modern-btn-primary {
    background: var(--primary-color);
    color: white;
}

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

.modern-btn-secondary {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.modern-btn-secondary:hover {
    background: var(--primary-color);
    color: white;
}

.modern-btn-large {
    padding: var(--spacing-lg) var(--spacing-xxl);
    font-size: var(--font-size-lg);
}

/* ============================================
   FOOTER
   ============================================ */

.modern-footer {
    background: var(--primary-color);
    color: white;
    padding: var(--spacing-xxl) 0 var(--spacing-lg) 0;
    margin-top: var(--spacing-xxl);
}

.modern-footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.modern-footer-section h4 {
    font-size: var(--font-size-lg);
    margin: 0 0 var(--spacing-md) 0;
}

.modern-footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

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

.modern-footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.modern-footer-links a:hover {
    color: white;
}

.modern-footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-lg);
    text-align: center;
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.6);
}

/* ============================================
   MOBILE RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
    .modern-header-flex {
        flex-wrap: wrap;
    }
    
    .modern-search-container {
        order: 3;
        width: 100%;
        max-width: 100%;
    }
    
    .modern-categories-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
        gap: var(--spacing-sm);
    }
    
    .modern-items-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: var(--spacing-md);
    }
    
    .modern-hero h1 {
        font-size: var(--font-size-xl);
    }
    
    .modern-container {
        padding: 0 var(--spacing-md);
    }
}

/* ============================================
   UTILITIES
   ============================================ */

.modern-text-center {
    text-align: center;
}

.modern-mt-lg {
    margin-top: var(--spacing-lg);
}

.modern-mb-lg {
    margin-bottom: var(--spacing-lg);
}

.modern-hidden-mobile {
    display: block;
}

@media (max-width: 768px) {
    .modern-hidden-mobile {
        display: none;
    }
}

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

.modern-spinner {
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ============================================
   ITEM DETAIL PAGE
   ============================================ */

.modern-item-detail {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-lg);
}

.modern-item-gallery {
    position: relative;
    background: var(--bg-secondary);
}

.modern-item-main-image {
    width: 100%;
    max-height: 500px;
    object-fit: contain;
    background: var(--bg-secondary);
}

.modern-item-thumbnails {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    overflow-x: auto;
}

.modern-item-thumbnail {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    cursor: pointer;
    border: 2px solid transparent;
    transition: border-color var(--transition-fast);
}

.modern-item-thumbnail:hover,
.modern-item-thumbnail.active {
    border-color: var(--primary-color);
}

.modern-item-info {
    padding: var(--spacing-xl);
}

.modern-item-detail-title {
    font-size: var(--font-size-xxl);
    font-weight: 700;
    margin: 0 0 var(--spacing-md) 0;
}

.modern-item-detail-price {
    font-size: 28px;
    font-weight: 700;
    color: var(--success-color);
    margin-bottom: var(--spacing-lg);
}

.modern-item-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
}

.modern-item-meta-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.modern-item-description {
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.modern-contact-seller {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
}

.modern-contact-seller h3 {
    margin: 0 0 var(--spacing-lg) 0;
}

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

.modern-fade-in {
    animation: fadeIn var(--transition-normal) ease-out;
}