* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-dark: #0a0a0a;
    --bg-card: #1a1a1a;
    --bg-hover: #2a2a2a;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-muted: #666666;
    --gold-primary: #ffd700;
    --gold-secondary: #b8860b;
    --gold-dark: #daa520;
    --accent: #23e5db;
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --border: #333333;
    --shadow: rgba(0, 0, 0, 0.5);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-dark);
    min-height: 100vh;
}

/* Professional Navigation */
.navbar {
    background: linear-gradient(135deg, #1a1a1a, #2a1e0a);
    color: var(--text-primary);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 4px 20px var(--shadow);
    border-bottom: 2px solid var(--gold-primary);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo {
    width: 40px;
    height: 40px;
    background: linear-gradient(45deg, var(--gold-primary), var(--gold-secondary));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.2rem;
    color: #000;
}

.nav-brand h1 {
    background: linear-gradient(45deg, var(--gold-primary), var(--gold-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 1.8rem;
    font-weight: 700;
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
    transition: all 0.3s ease;
}

.nav-links a {
    color: var(--text-primary);
    text-decoration: none;
    padding: 0.7rem 1.2rem;
    border-radius: 6px;
    transition: all 0.3s ease;
    border: 1px solid transparent;
    font-weight: 500;
    white-space: nowrap;
}

.nav-links a:hover {
    background: var(--bg-hover);
    border-color: var(--gold-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, rgba(26, 26, 26, 0.9), rgba(42, 30, 10, 0.9));
    color: var(--text-primary);
    text-align: center;
    padding: 4rem 2rem;
    position: relative;
    overflow: hidden;
}

.hero-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(45deg, var(--gold-primary), var(--gold-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    color: var(--text-secondary);
}

/* Category Buttons */
.categories-section {
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.categories-section h3 {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--gold-primary);
    font-size: 1.8rem;
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.category-btn {
    background: var(--bg-card);
    border: 2px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    color: var(--text-primary);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.category-btn:hover {
    border-color: var(--gold-primary);
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(255, 215, 0, 0.2);
}

.category-btn .emoji {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.category-btn .name {
    font-size: 1.1rem;
    font-weight: 600;
}

/* Search Section */
.search-section {
    background: var(--bg-card);
    padding: 2rem;
    margin: 2rem auto;
    max-width: 900px;
    border-radius: 12px;
    box-shadow: 0 8px 32px var(--shadow);
    border: 1px solid var(--border);
}

.search-form {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr auto;
    gap: 1rem;
    align-items: end;
}

.search-input, .location-input, .category-input {
    padding: 1rem;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.search-input:focus, .location-input:focus, .category-input:focus {
    outline: none;
    border-color: var(--gold-primary);
    box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.1);
}

.search-btn {
    background: linear-gradient(45deg, var(--gold-primary), var(--gold-secondary));
    color: #000;
    border: none;
    padding: 1rem 2rem;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
}

.search-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 215, 0, 0.3);
}

/* Ads Grid - 3 items per row */
.ads-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    padding: 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

.ad-card {
    background: var(--bg-card);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 32px var(--shadow);
    transition: all 0.3s ease;
    border: 1px solid var(--border);
    cursor: pointer;
}

.ad-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 48px var(--shadow);
    border-color: var(--gold-primary);
}

.ad-card img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

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

.no-image {
    width: 100%;
    height: 220px;
    background: linear-gradient(45deg, var(--bg-dark), var(--border));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
}

.ad-info {
    padding: 1.5rem;
}

.ad-info h4 {
    margin-bottom: 0.8rem;
    color: var(--text-primary);
    font-size: 1.2rem;
    line-height: 1.4;
}

.price {
    font-size: 1.4rem;
    font-weight: bold;
    color: var(--gold-primary);
    margin-bottom: 0.5rem;
}

.location {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.whatsapp-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: #25D366;
    color: white;
    padding: 0.8rem 1.5rem;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 600;
    transition: all 0.3s ease;
    width: 100%;
    justify-content: center;
}

.whatsapp-btn:hover {
    background: #128C7E;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(37, 211, 102, 0.3);
}

/* Buttons */
.btn-primary, .btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2.5rem;
    margin: 0.5rem;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(45deg, var(--gold-primary), var(--gold-secondary));
    color: #000;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(255, 215, 0, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--gold-primary);
    border-color: var(--gold-primary);
}

.btn-secondary:hover {
    background: var(--gold-primary);
    color: #000;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(255, 215, 0, 0.2);
}

/* Ad Containers */
.ad-container {
    margin: 30px auto;
    text-align: center;
    max-width: 728px;
}

.ad-label {
    font-size: 12px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.ad-break {
    grid-column: 1 / -1;
    margin: 30px 0;
    text-align: center;
}

/* Footer */
footer {
    background: linear-gradient(135deg, #1a1a1a, #2a1e0a);
    color: var(--text-secondary);
    text-align: center;
    padding: 3rem 2rem;
    margin-top: 4rem;
    border-top: 1px solid var(--border);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.footer-section {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-section h4 {
    color: var(--gold-primary);
    margin-bottom: 1rem;
}

.footer-section a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: var(--gold-primary);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    color: var(--text-secondary);
}

/* Admin Styles */
.admin-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 4px 20px var(--shadow);
    border: 1px solid var(--border);
}

.stat-card h3 {
    font-size: 2rem;
    color: var(--gold-primary);
    margin-bottom: 0.5rem;
}

.admin-section {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: 12px;
    margin-bottom: 2rem;
    border: 1px solid var(--border);
}

/* Item Detail Styles */
.item-detail {
    max-width: 1400px;
    margin: 2rem auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 2rem;
}

.item-gallery {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

.main-image img {
    width: 100%;
    max-height: 500px;
    object-fit: cover;
    border-radius: 12px;
}

.thumbnail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 1rem;
}

.thumbnail {
    border-radius: 8px;
    overflow: hidden;
    border: 2px solid var(--border);
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.thumbnail img {
    width: 100%;
    height: 80px;
    object-fit: cover;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .ads-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .item-detail {
        grid-template-columns: 1fr;
    }
    
    .search-form {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .navbar {
        padding: 1rem;
        flex-wrap: wrap;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .nav-links {
        display: none;
        width: 100%;
        flex-direction: column;
        gap: 0.5rem;
        margin-top: 1rem;
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .nav-links a {
        width: 100%;
        text-align: center;
    }
    
    .hero-content h2 {
        font-size: 2rem;
    }
    
    .ads-grid {
        grid-template-columns: 1fr;
        padding: 1rem;
    }
    
    .search-form {
        grid-template-columns: 1fr;
    }
    
    .categories-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 2rem 1rem;
    }
    
    .hero-content h2 {
        font-size: 1.5rem;
    }
    
    .categories-section {
        padding: 1rem;
    }
    
    .admin-stats {
        grid-template-columns: 1fr 1fr;
    }
}

/* Status Styles */
.status-pending { color: var(--warning); font-weight: bold; }
.status-approved { color: var(--success); font-weight: bold; }
.status-rejected { color: var(--error); font-weight: bold; }
.status-sold { color: var(--gold-primary); font-weight: bold; }
.status-expired { color: var(--text-muted); font-weight: bold; }

/* Form Styles */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 600;
}

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 1rem;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--gold-primary);
    box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.1);
}

.error-message {
    background: rgba(239, 68, 68, 0.1);
    color: var(--error);
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    text-align: center;
    border: 1px solid var(--error);
}

.success-message {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    text-align: center;
    border: 1px solid var(--success);
}