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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

a {
    text-decoration: none;
    color: #007bff;
    transition: color 0.3s ease;
}

a:hover {
    color: #0056b3;
}

img {
    max-width: 100%;
    height: auto;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* Header */
.header {
    background: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.top-bar {
    background: #2c3e50;
    color: white;
    padding: 8px 0;
    font-size: 14px;
}

.top-bar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.top-bar-left, .top-bar-right {
    display: flex;
    gap: 20px;
}

.top-bar a {
    color: white;
    font-size: 12px;
}

.main-header {
    padding: 15px 0;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    color: #2c3e50;
}

.search-bar {
    flex: 1;
    max-width: 400px;
    margin: 0 30px;
    position: relative;
}

.search-form {
    display: flex;
    border: 2px solid #e9ecef;
    border-radius: 25px;
    overflow: hidden;
}

.search-form input {
    flex: 1;
    border: none;
    padding: 10px 15px;
    font-size: 14px;
    outline: none;
}

.search-form button {
    background: #007bff;
    border: none;
    color: white;
    padding: 10px 20px;
    cursor: pointer;
    transition: background 0.3s ease;
}

.search-form button:hover {
    background: #0056b3;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.cart-icon {
    position: relative;
    padding: 8px;
    background: #28a745;
    color: white;
    border-radius: 50%;
    text-align: center;
    min-width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.cart-count {
    position: absolute;
    top: -5px;
    right: -5px;
    background: #dc3545;
    color: white;
    border-radius: 50%;
    min-width: 20px;
    height: 20px;
    font-size: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Navigation */
.nav {
    background: #34495e;
    padding: 0;
}

.nav-list {
    display: flex;
    list-style: none;
    margin: 0;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: block;
    padding: 15px 20px;
    color: white;
    font-weight: 500;
    transition: background 0.3s ease;
}

.nav-link:hover, .nav-item.active .nav-link {
    background: #2c3e50;
    color: white;
}

/* Dropdown Menu */
.dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1000;
}

.nav-item:hover .dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown a {
    display: block;
    padding: 10px 15px;
    color: #333;
    border-bottom: 1px solid #eee;
}

.dropdown a:hover {
    background: #f8f9fa;
}

/* Main Content */
.main-content {
    min-height: calc(100vh - 200px);
    padding: 30px 0;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 80px 0;
    text-align: center;
    margin-bottom: 50px;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    font-weight: 300;
}

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

.btn {
    display: inline-block;
    padding: 12px 30px;
    background: #007bff;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    text-align: center;
    font-size: 16px;
    font-weight: 500;
    transition: all 0.3s ease;
    text-decoration: none;
}

.btn:hover {
    background: #0056b3;
    transform: translateY(-2px);
    color: white;
}

.btn-primary {
    background: #007bff;
}

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

.btn-danger {
    background: #dc3545;
}

.btn-secondary {
    background: #6c757d;
}

.btn-sm {
    padding: 8px 20px;
    font-size: 14px;
}

.btn-lg {
    padding: 15px 40px;
    font-size: 18px;
}

/* Grid System */
.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -15px;
}

.col {
    flex: 1;
    padding: 0 15px;
}

.col-1 { flex: 0 0 8.333333%; max-width: 8.333333%; }
.col-2 { flex: 0 0 16.666667%; max-width: 16.666667%; }
.col-3 { flex: 0 0 25%; max-width: 25%; }
.col-4 { flex: 0 0 33.333333%; max-width: 33.333333%; }
.col-6 { flex: 0 0 50%; max-width: 50%; }
.col-8 { flex: 0 0 66.666667%; max-width: 66.666667%; }
.col-9 { flex: 0 0 75%; max-width: 75%; }
.col-12 { flex: 0 0 100%; max-width: 100%; }

/* Product Grid */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 50px;
}

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

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.15);
}

.product-image {
    position: relative;
    overflow: hidden;
    height: 250px;
}

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

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

.product-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    background: #dc3545;
    color: white;
    padding: 5px 10px;
    border-radius: 15px;
    font-size: 12px;
    font-weight: bold;
}

.product-info {
    padding: 20px;
}

.product-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
    color: #2c3e50;
}

.product-title a {
    color: inherit;
}

.product-title a:hover {
    color: #007bff;
}

.product-price {
    margin-bottom: 15px;
}

.current-price {
    font-size: 20px;
    font-weight: bold;
    color: #28a745;
}

.original-price {
    font-size: 16px;
    color: #6c757d;
    text-decoration: line-through;
    margin-left: 10px;
}

.product-description {
    color: #666;
    font-size: 14px;
    line-height: 1.4;
    margin-bottom: 15px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Filters Sidebar */
.filters-sidebar {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 30px;
}

.filter-group {
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 1px solid #eee;
}

.filter-group:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.filter-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 15px;
    color: #2c3e50;
}

.filter-item {
    margin-bottom: 8px;
}

.filter-item label {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-size: 14px;
}

.filter-item input[type="checkbox"] {
    margin-right: 8px;
}

.price-range {
    display: flex;
    gap: 10px;
    align-items: center;
}

.price-range input {
    flex: 1;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
}

/* Forms */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: #2c3e50;
}

.form-control {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: #007bff;
    box-shadow: 0 0 0 3px rgba(0,123,255,0.25);
}

.form-text {
    font-size: 14px;
    color: #6c757d;
    margin-top: 5px;
}

/* Cart */
.cart-table {
    width: 100%;
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.cart-table table {
    width: 100%;
    border-collapse: collapse;
}

.cart-table th,
.cart-table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

.cart-table th {
    background: #f8f9fa;
    font-weight: 600;
    color: #2c3e50;
}

.cart-item-image {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 5px;
}

.quantity-controls {
    display: flex;
    align-items: center;
    gap: 10px;
}

.quantity-controls input {
    width: 60px;
    text-align: center;
    padding: 5px;
    border: 1px solid #ddd;
    border-radius: 3px;
}

.quantity-btn {
    background: #f8f9fa;
    border: 1px solid #ddd;
    width: 30px;
    height: 30px;
    border-radius: 3px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s ease;
}

.quantity-btn:hover {
    background: #e9ecef;
}

.cart-summary {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-top: 30px;
}

.summary-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
    padding-bottom: 10px;
}

.summary-row.total {
    font-size: 18px;
    font-weight: bold;
    border-top: 2px solid #eee;
    padding-top: 15px;
    margin-top: 15px;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    gap: 5px;
    margin: 30px 0;
}

.pagination a,
.pagination span {
    padding: 10px 15px;
    border: 1px solid #ddd;
    color: #007bff;
    text-decoration: none;
    transition: all 0.3s ease;
}

.pagination a:hover {
    background: #007bff;
    color: white;
    border-color: #007bff;
}

.pagination .current {
    background: #007bff;
    color: white;
    border-color: #007bff;
}

.pagination .disabled {
    color: #6c757d;
    cursor: not-allowed;
}

/* Alerts */
.alert {
    padding: 15px 20px;
    border-radius: 5px;
    margin-bottom: 20px;
    border: 1px solid transparent;
}

.alert-success {
    background: #d4edda;
    border-color: #c3e6cb;
    color: #155724;
}

.alert-error,
.alert-danger {
    background: #f8d7da;
    border-color: #f5c6cb;
    color: #721c24;
}

.alert-warning {
    background: #fff3cd;
    border-color: #ffeaa7;
    color: #856404;
}

.alert-info {
    background: #d1ecf1;
    border-color: #bee5eb;
    color: #0c5460;
}

/* Loading Spinner */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

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

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    padding: 30px;
    border-radius: 10px;
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid #eee;
}

.modal-title {
    font-size: 20px;
    font-weight: 600;
    color: #2c3e50;
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: #6c757d;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Footer */
.footer {
    background: #2c3e50;
    color: white;
    padding: 50px 0 20px;
    margin-top: 50px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 30px;
}

.footer-section h3 {
    margin-bottom: 20px;
    font-size: 18px;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 8px;
}

.footer-section ul li a {
    color: #bdc3c7;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #34495e;
    color: #bdc3c7;
    font-size: 14px;
}

/* Product Detail Page */
.product-detail {
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    overflow: hidden;
    margin-bottom: 30px;
}

.product-detail-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    padding: 40px;
}

.product-gallery {
    position: relative;
}

.main-image {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: 10px;
    margin-bottom: 20px;
}

.thumbnail-images {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

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

.thumbnail:hover,
.thumbnail.active {
    border-color: #007bff;
}

.product-details h1 {
    font-size: 28px;
    margin-bottom: 15px;
    color: #2c3e50;
}

.product-meta {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
    font-size: 14px;
    color: #6c757d;
}

.product-price {
    margin-bottom: 20px;
}

.product-price .current-price {
    font-size: 32px;
    font-weight: bold;
    color: #28a745;
}

.product-price .original-price {
    font-size: 20px;
    color: #6c757d;
    text-decoration: line-through;
    margin-left: 15px;
}

.product-description {
    margin-bottom: 25px;
    line-height: 1.8;
    color: #555;
}

.product-attributes {
    margin-bottom: 25px;
}

.attribute-group {
    margin-bottom: 15px;
}

.attribute-label {
    font-weight: 600;
    margin-bottom: 5px;
    display: block;
}

.attribute-value {
    color: #666;
}

.add-to-cart-form {
    display: flex;
    gap: 15px;
    align-items: center;
    margin-bottom: 20px;
}

.quantity-selector {
    display: flex;
    align-items: center;
    border: 1px solid #ddd;
    border-radius: 5px;
    overflow: hidden;
}

.quantity-selector button {
    background: #f8f9fa;
    border: none;
    width: 40px;
    height: 40px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s ease;
}

.quantity-selector button:hover {
    background: #e9ecef;
}

.quantity-selector input {
    width: 60px;
    text-align: center;
    border: none;
    height: 40px;
    outline: none;
}

.stock-status {
    margin-bottom: 15px;
    padding: 10px;
    border-radius: 5px;
    font-size: 14px;
    font-weight: 500;
}

.in-stock {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.out-of-stock {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.low-stock {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffeaa7;
}

/* Checkout Page */
.checkout-form {
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.checkout-section {
    margin-bottom: 40px;
    padding-bottom: 30px;
    border-bottom: 1px solid #eee;
}

.checkout-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.checkout-section h3 {
    margin-bottom: 20px;
    color: #2c3e50;
    font-size: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.form-row.single {
    grid-template-columns: 1fr;
}

.payment-methods {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.payment-method {
    border: 2px solid #e9ecef;
    border-radius: 10px;
    padding: 20px;
    cursor: pointer;
    transition: border-color 0.3s ease;
    text-align: center;
}

.payment-method:hover {
    border-color: #007bff;
}

.payment-method.selected {
    border-color: #007bff;
    background: #f8f9fa;
}

.payment-method img {
    height: 40px;
    margin-bottom: 10px;
}

.order-summary {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 100px;
}

.order-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
    border-bottom: 1px solid #eee;
}

.order-item:last-child {
    border-bottom: none;
}

.item-info {
    display: flex;
    gap: 15px;
    flex: 1;
}

.item-image {
    width: 60px;
    height: 60px;
    object-fit: cover;
    border-radius: 5px;
}

.item-details h4 {
    font-size: 14px;
    margin-bottom: 5px;
}

.item-details p {
    font-size: 12px;
    color: #6c757d;
}

/* User Account */
.account-sidebar {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    height: fit-content;
}

.account-nav {
    list-style: none;
}

.account-nav li {
    margin-bottom: 5px;
}

.account-nav a {
    display: block;
    padding: 12px 15px;
    color: #333;
    border-radius: 5px;
    transition: background 0.3s ease;
}

.account-nav a:hover,
.account-nav a.active {
    background: #007bff;
    color: white;
}

.account-content {
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 10px;
    }

    .header-content {
        flex-direction: column;
        gap: 20px;
    }

    .search-bar {
        margin: 0;
        max-width: 100%;
    }

    .nav-list {
        flex-direction: column;
    }

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

    .products-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 20px;
    }

    .product-detail-content {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 20px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .payment-methods {
        grid-template-columns: 1fr;
    }

    .cart-table {
        overflow-x: auto;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .checkout-form,
    .account-content {
        padding: 20px;
    }

    .col-3,
    .col-4,
    .col-6,
    .col-8,
    .col-9 {
        flex: 0 0 100%;
        max-width: 100%;
    }
}

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

    .hero {
        padding: 40px 0;
    }

    .hero h1 {
        font-size: 1.5rem;
    }

    .product-detail-content {
        padding: 15px;
    }

    .main-image {
        height: 250px;
    }
}

/* User Dropdown Styles */
.user-dropdown {
    position: relative;
    display: inline-block;
}

.user-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background: none;
    border: none;
    color: #333;
    cursor: pointer;
    padding: 8px 12px;
    border-radius: 5px;
    transition: background-color 0.3s;
    font-size: 14px;
}

.user-btn:hover {
    background: #f8f9fa;
}

.user-name {
    font-weight: 500;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background: white;
    border: 1px solid #dee2e6;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    padding: 8px 0;
    min-width: 200px;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
}

.dropdown-menu.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    color: #333;
    text-decoration: none;
    transition: background-color 0.3s;
    font-size: 14px;
}

.dropdown-item:hover {
    background: #f8f9fa;
    color: #333;
}

.dropdown-divider {
    height: 1px;
    background: #dee2e6;
    margin: 8px 0;
}

.header-btn {
    padding: 8px 16px;
    border-radius: 5px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s;
    margin-left: 8px;
    display: inline-block;
}

.login-btn {
    color: #007bff;
    border: 1px solid #007bff;
}

.login-btn:hover {
    background: #007bff;
    color: white;
}

.signup-btn {
    background: #007bff;
    color: white;
    border: 1px solid #007bff;
}

.signup-btn:hover {
    background: #0056b3;
    border-color: #0056b3;
}