/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #1E3A8A;
    --primary-hover: #152c68;
    --secondary-color: #F97316;
    --success-color: #10B981;
    --danger-color: #EF4444;
    --warning-color: #F59E0B;
    --light-bg: #F9FAFB;
    --dark-text: #1F2937;
    --light-text: #fff;
    --border-color: #E5E7EB;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
    --card-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

body {
    font-family: 'Inter', 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--dark-text);
    background-color: var(--light-bg);
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header and Navigation */
.navbar {
    background-color: var(--light-text);
    box-shadow: var(--card-shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo h2 {
    color: var(--primary-color);
}

.logo span {
    color: var(--danger-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-link {
    text-decoration: none;
    color: var(--dark-text);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover, .nav-link.active {
    color: var(--primary-color);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background-color: var(--dark-text);
    margin: 3px 0;
    transition: var(--transition);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color), #3b82f6);
    color: var(--light-text);
    padding: 100px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(255,255,255,0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(255,255,255,0.1) 0%, transparent 50%);
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    font-weight: 800;
    letter-spacing: -0.025em;
    text-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), #3b82f6);
    color: var(--light-text);
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    transition: var(--transition);
    box-shadow: 0 4px 6px rgba(30, 58, 138, 0.2);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-hover), #2563eb);
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(30, 58, 138, 0.3);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: var(--light-text);
}

.btn-secondary:hover {
    background-color: #5a6268;
}

.btn-warning {
    background-color: var(--warning-color);
    color: var(--dark-text);
}

.btn-warning:hover {
    background-color: #e0a800;
}

.btn-danger {
    background-color: var(--danger-color);
    color: var(--light-text);
}

.btn-danger:hover {
    background-color: #c82333;
}

/* Search Section */
.search-section {
    padding: 30px 0;
    background-color: var(--light-bg);
}

.search-box {
    display: flex;
    max-width: 700px;
    margin: 0 auto 25px;
    border: 2px solid var(--border-color);
    border-radius: 50px;
    overflow: hidden;
    background: var(--light-text);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.search-box:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
}

.search-box input {
    flex: 1;
    padding: 16px 24px;
    border: none;
    outline: none;
    font-size: 1.1rem;
    background: transparent;
    color: var(--dark-text);
}

.search-box button {
    padding: 16px 28px;
    background: linear-gradient(135deg, var(--primary-color), #3b82f6);
    color: var(--light-text);
    border: none;
    cursor: pointer;
    font-size: 1.1rem;
    transition: var(--transition);
}

.search-box button:hover {
    background: linear-gradient(135deg, var(--primary-hover), #2563eb);
}

.filter-section {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

.filter-section select {
    padding: 10px 15px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    background-color: var(--light-text);
    font-size: 0.9rem;
}

/* Products Grid */
.products-section {
    padding: 40px 0;
}

.products-section h2 {
    margin-bottom: 30px;
    text-align: center;
    color: var(--dark-text);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
    padding: 20px 0;
}

.product-card {
    background-color: var(--light-text);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
    position: relative;
    border: 1px solid var(--border-color);
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    border-color: var(--primary-color);
}

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

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

.product-info {
    padding: 15px;
}

.product-title {
    font-size: 1.1rem;
    margin-bottom: 8px;
    color: var(--dark-text);
}

.product-price {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 12px;
    letter-spacing: -0.025em;
}

.product-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: var(--secondary-color);
}

.badge {
    position: absolute;
    top: 10px;
    left: 10px;
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: bold;
}

.badge.new {
    background: linear-gradient(135deg, var(--success-color), #059669);
    color: var(--light-text);
    padding: 6px 12px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.8rem;
}

.badge.used {
    background: linear-gradient(135deg, var(--warning-color), #d97706);
    color: var(--light-text);
    padding: 6px 12px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.8rem;
}

.badge.sold {
    background: linear-gradient(135deg, var(--danger-color), #dc2626);
    color: var(--light-text);
    padding: 6px 12px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.8rem;
}

/* Auth Forms */
.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 140px);
    padding: 20px;
}

.auth-form {
    background-color: var(--light-text);
    padding: 48px;
    border-radius: 16px;
    box-shadow: var(--card-shadow);
    width: 100%;
    max-width: 480px;
    text-align: center;
    border: 1px solid var(--border-color);
}

.auth-form h2 {
    margin-bottom: 10px;
    color: var(--dark-text);
}

.auth-form p {
    margin-bottom: 30px;
    color: var(--secondary-color);
}

.tabs {
    display: flex;
    margin-bottom: 30px;
    border-bottom: 1px solid var(--border-color);
}

.tab-btn {
    flex: 1;
    padding: 12px;
    background: none;
    border: none;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    position: relative;
    color: var(--secondary-color);
}

.tab-btn.active {
    color: var(--primary-color);
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: var(--primary-color);
}

.auth-tab-content {
    display: none;
}

.auth-tab-content.active {
    display: block;
}

.form-group {
    margin-bottom: 20px;
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: var(--dark-text);
}

.form-group input, .form-group textarea, .form-group select {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    font-size: 1rem;
    transition: var(--transition);
    background-color: var(--light-text);
}

.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
}

.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.auth-footer {
    margin-top: 20px;
    font-size: 0.8rem;
    color: var(--secondary-color);
}

.auth-footer a {
    color: var(--primary-color);
    text-decoration: none;
}

/* Profile Page */
.profile-page {
    padding: 40px 0;
}

.profile-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    background-color: var(--light-text);
    padding: 20px;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.profile-info {
    display: flex;
    align-items: center;
    gap: 20px;
}

.profile-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background-color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--light-text);
    font-size: 2rem;
}

.profile-details h2 {
    margin-bottom: 5px;
}

.profile-tabs {
    display: flex;
    margin-bottom: 30px;
    border-bottom: 1px solid var(--border-color);
}

.profile-tabs .tab-btn {
    padding: 12px 30px;
}

/* Post Product Page */
.post-product-container {
    background-color: var(--light-text);
    padding: 30px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    margin: 40px 0;
}

.post-product-container h2 {
    margin-bottom: 10px;
    color: var(--dark-text);
}

.post-product-container p {
    margin-bottom: 30px;
    color: var(--secondary-color);
}

.form-row {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
}

.half-width {
    flex: 1;
}

.image-upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 10px;
    padding: 20px;
    text-align: center;
    cursor: pointer;
    position: relative;
}

#product-images {
    display: none;
}

.upload-placeholder {
    display: block;
    padding: 30px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.upload-placeholder:hover {
    background-color: #f8f9fa;
}

.image-preview {
    margin-top: 15px;
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}

.preview-image {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 5px;
    border: 1px solid var(--border-color);
    margin: 2px;
}

.upload-placeholder i {
    font-size: 3rem;
    color: var(--secondary-color);
    margin-bottom: 10px;
}

.upload-placeholder p {
    margin-bottom: 5px;
}

.image-preview {
    display: flex;
    gap: 10px;
    margin-top: 15px;
    flex-wrap: wrap;
}

.preview-image {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 5px;
    border: 1px solid var(--border-color);
}

/* Product Detail Page */
.product-detail-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin: 40px 0;
    background-color: var(--light-text);
    padding: 30px;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.main-image img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: 10px;
}

.thumbnail-images {
    display: flex;
    gap: 8px;
    margin-top: 15px;
    flex-wrap: wrap;
    justify-content: center;
}

.thumbnail-image {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 5px;
    border: 2px solid transparent;
    cursor: pointer;
    transition: border-color 0.3s;
    margin: 2px;
}

.thumbnail-image:hover {
    border-color: #ddd;
}

.thumbnail-image.active {
    border-color: var(--primary-color);
}



.product-info-section h1 {
    margin-bottom: 15px;
    color: var(--dark-text);
}

.product-info-section .product-price {
    font-size: 2rem;
    margin-bottom: 20px;
}

.product-meta {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
    padding: 15px 0;
    border-bottom: 1px solid var(--border-color);
}

.product-meta div {
    display: flex;
    align-items: center;
    gap: 10px;
}

.product-contact-buttons {
    display: flex;
    gap: 10px;
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid #eee;
}

.btn-sm {
    padding: 5px 10px;
    font-size: 0.85rem;
}

.contact-btn, .whatsapp-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
}

.contact-btn i, .whatsapp-btn i {
    font-size: 0.9rem;
}

.seller-details-section {
    margin: 20px 0;
    padding: 20px;
    background-color: #f8f9fa;
    border-radius: 10px;
    border: 1px solid #e9ecef;
}

.seller-details-section h3 {
    margin-bottom: 15px;
    color: var(--dark-text);
    text-align: center;
}

.seller-info-card {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.seller-name, .seller-contact, .product-location, .product-date {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    background-color: white;
    border-radius: 5px;
    border: 1px solid #dee2e6;
}

.seller-name i, .seller-contact i, .product-location i, .product-date i {
    width: 20px;
    text-align: center;
    color: var(--primary-color);
}

.seller-contact {
    font-weight: 600;
    color: var(--primary-color);
}

.btn-success {
    background-color: #28a745;
    color: white;
}

.btn-success:hover {
    background-color: #218838;
}

#edit-profile-form {
    margin-top: 20px;
    padding: 20px;
    background-color: #f8f9fa;
    border-radius: 10px;
    width: 100%;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

#edit-profile-form h3 {
    margin-bottom: 20px;
    color: var(--dark-text);
    text-align: center;
}

#edit-profile-form .form-group {
    margin-bottom: 15px;
}

#edit-profile-form .form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: var(--dark-text);
}

#edit-profile-form .form-group input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 1rem;
}

#edit-profile-form .form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(74, 108, 247, 0.2);
}

#edit-profile-form .btn {
    margin-right: 10px;
    margin-top: 10px;
}

.product-description {
    margin-bottom: 30px;
}

.product-description h3 {
    margin-bottom: 10px;
}

.product-actions, .seller-options {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

/* Loading States */
.loading-products {
    text-align: center;
    padding: 40px;
    grid-column: 1 / -1;
}

.no-products-message {
    text-align: center;
    padding: 60px 20px;
    grid-column: 1 / -1;
}

.no-products-message h3 {
    margin-bottom: 15px;
    color: var(--dark-text);
}

.no-products-message p {
    margin-bottom: 20px;
    color: var(--secondary-color);
}

.owner-actions {
    padding: 15px;
    border-top: 1px solid var(--border-color);
    text-align: center;
    background-color: #f8f9fa;
}

.owner-actions .btn {
    margin: 0 5px;
}

.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 15px 20px;
    border-radius: 10px;
    color: white;
    z-index: 9999;
    max-width: 350px;
    box-shadow: var(--card-shadow);
    font-weight: 500;
    transform: translateX(120%);
    transition: transform 0.3s ease;
}

.notification.show {
    transform: translateX(0);
}

.notification.success {
    background: linear-gradient(135deg, var(--success-color), #059669);
}

.notification.error {
    background: linear-gradient(135deg, var(--danger-color), #dc2626);
}

.notification.warning {
    background: linear-gradient(135deg, var(--warning-color), #d97706);
}

.notification.info {
    background: linear-gradient(135deg, var(--primary-color), #3b82f6);
}

/* Categories Section */
.categories-section {
    padding: 60px 0;
    background-color: var(--light-text);
}

.categories-section h2 {
    text-align: center;
    margin-bottom: 40px;
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--dark-text);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.category-card {
    background: var(--light-text);
    border-radius: 16px;
    padding: 30px 20px;
    text-align: center;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    cursor: pointer;
}

.category-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    border-color: var(--primary-color);
}

.category-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), #3b82f6);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    transition: var(--transition);
}

.category-card:hover .category-icon {
    transform: scale(1.1) rotate(5deg);
    background: linear-gradient(135deg, var(--secondary-color), #ea580c);
}

.category-icon i {
    font-size: 2.5rem;
    color: var(--light-text);
}

.category-card h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--dark-text);
}

.category-card p {
    color: var(--secondary-color);
    font-weight: 500;
    margin: 0;
}

/* Featured Products Section */
.featured-section {
    padding: 60px 0;
    background-color: var(--light-bg);
}

.featured-section .section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.featured-section h2 {
    margin: 0;
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark-text);
}

.view-all-btn {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    padding: 10px 20px;
    border-radius: 8px;
    transition: var(--transition);
    border: 2px solid var(--primary-color);
}

.view-all-btn:hover {
    background-color: var(--primary-color);
    color: var(--light-text);
}

.featured-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* Section Headers */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 15px;
}

.section-header h2 {
    margin: 0;
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark-text);
}

.sort-options select {
    padding: 10px 15px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--light-text);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.sort-options select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
}

/* Footer */
footer {
    background: linear-gradient(135deg, var(--dark-text), #111827);
    color: var(--light-text);
    padding: 40px 0;
    text-align: center;
    margin-top: 60px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

/* Responsive Design */
@media screen and (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--light-text);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow);
        padding: 20px 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .hamburger {
        display: flex;
    }

    .hero-content h1 {
        font-size: 2.5rem;
    }

    .categories-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .category-card {
        padding: 20px 15px;
    }

    .category-icon {
        width: 60px;
        height: 60px;
    }

    .category-icon i {
        font-size: 2rem;
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .form-row {
        flex-direction: column;
        gap: 0;
    }

    .product-detail-container {
        grid-template-columns: 1fr;
    }

    .product-actions, .seller-options {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }
}

@media screen and (max-width: 480px) {
    .products-grid {
        grid-template-columns: 1fr;
    }

    .categories-grid {
        grid-template-columns: 1fr;
    }

    .filter-section {
        flex-direction: column;
        align-items: center;
    }

    .filter-section select {
        width: 100%;
    }

    .auth-form {
        padding: 25px;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .section-header h2 {
        font-size: 1.5rem;
    }
}