:root {
    --primary: #4dfa09;
    --secondary: #5f27cd;
    --light: #f8f9fa;
    --dark: #343a40;
    --gray: #adb5bd;
    --success: #20bf6b;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #f1f2f6;
}

/* Header Styles */
.header {
    background-color: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.top-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
    background-color: var(--primary);
    color: white;
}

.top-header-left a {
    color: white;
    text-decoration: none;
    margin-right: 15px;
    font-size: 14px;
}

.top-header-right a {
    color: white;
    text-decoration: none;
    margin-left: 15px;
    font-size: 14px;
}

.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.logo {
    font-size: 28px;
    font-weight: bold;
    color: var(--primary);
}

.search-bar {
    flex: 1;
    margin: 0 20px;
    position: relative;
}

.search-bar input {
    width: 100%;
    padding: 12px 20px;
    border: 1px solid var(--gray);
    border-radius: 4px;
    font-size: 16px;
    outline: none;
}

.search-bar button {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--primary);
    border: none;
    color: white;
    padding: 8px 15px;
    border-radius: 4px;
    cursor: pointer;
}

.header-actions {
    display: flex;
    gap: 15px;
}

.header-actions a {
    text-decoration: none;
    color: var(--dark);
    display: flex;
    flex-direction: column;
    align-items: center;
    font-size: 14px;
}

.header-actions a i {
    font-size: 20px;
    margin-bottom: 5px;
}

.nav-categories {
    display: flex;
    background-color: white;
    padding: 10px 20px;
    overflow-x: auto;
    gap: 20px;
    border-top: 1px solid #eee;
}

.nav-categories::-webkit-scrollbar {
    display: none;
}

.nav-category {
    white-space: nowrap;
    font-size: 14px;
    color: var(--dark);
    text-decoration: none;
    padding: 5px 0;
    position: relative;
}

.nav-category:hover {
    color: var(--primary);
}

.nav-category.active {
    color: var(--primary);
    font-weight: bold;
}

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

/* Banner Section */
.banner {
    margin: 20px;
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    height: 300px;
}

.banner-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.banner-content {
    position: absolute;
    top: 50%;
    left: 50px;
    transform: translateY(-50%);
    color: white;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.6);
}

.banner-content h1 {
    font-size: 36px;
    margin-bottom: 10px;
}

.banner-content p {
    font-size: 18px;
    margin-bottom: 20px;
}

.banner-btn {
    padding: 10px 25px;
    background-color: var(--primary);
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.banner-btn:hover {
    background-color: #ff5252;
}

/* Flash Sale */
.flash-sale {
    margin: 20px;
    background-color: white;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.section-title {
    font-size: 20px;
    font-weight: bold;
    color: var(--dark);
    display: flex;
    align-items: center;
}

.section-title i {
    color: var(--primary);
    margin-right: 10px;
}

.view-all {
    font-size: 14px;
    color: var(--primary);
    text-decoration: none;
}

.countdown {
    display: flex;
    gap: 5px;
    margin-left: 15px;
}

.countdown-item {
    background-color: var(--dark);
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 14px;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 15px;
}

.product-card {
    background-color: white;
    border-radius: 8px;
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.product-img-container {
    position: relative;
    height: 180px;
}

.product-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.discount-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    background-color: var(--primary);
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: bold;
}

.product-details {
    padding: 15px;
}

.product-title {
    font-size: 16px;
    color: var(--dark);
    margin-bottom: 5px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.product-price {
    display: flex;
    align-items: center;
    margin-bottom: 5px;
}

.current-price {
    font-size: 18px;
    font-weight: bold;
    color: var(--primary);
}

.original-price {
    font-size: 14px;
    color: var(--gray);
    text-decoration: line-through;
    margin-left: 10px;
}

.product-rating {
    display: flex;
    align-items: center;
    font-size: 14px;
    color: var(--gray);
}

.rating-stars {
    color: #ffc107;
    margin-right: 5px;
}

/* Categories */
.categories {
    margin: 20px;
    background-color: white;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 15px;
}

.category-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
}

.category-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background-color: var(--light);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 10px;
    color: var(--primary);
    font-size: 30px;
    transition: background-color 0.3s;
}

.category-card:hover .category-icon {
    background-color: var(--primary);
    color: white;
}

.category-name {
    font-size: 14px;
    color: var(--dark);
    text-align: center;
}

/* Featured Products */
.featured-products {
    margin: 20px;
    background-color: white;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* Footer */
.footer {
    background-color: var(--dark);
    color: white;
    padding: 40px 20px;
    margin-top: 40px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.footer-column h3 {
    font-size: 18px;
    margin-bottom: 20px;
    position: relative;
}

.footer-column h3::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 50px;
    height: 2px;
    background-color: var(--primary);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: var(--gray);
    text-decoration: none;
    transition: color 0.3s;
}

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

.payment-methods {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 15px;
}

.payment-method {
    background-color: white;
    border-radius: 4px;
    padding: 5px 10px;
    font-size: 12px;
    color: var(--dark);
}

.app-download {
    display: flex;
    gap: 10px;
    margin-top: 15px;
}

.app-button {
    background-color: black;
    color: white;
    border-radius: 4px;
    padding: 10px 15px;
    display: flex;
    align-items: center;
    text-decoration: none;
}

.app-button i {
    font-size: 20px;
    margin-right: 8px;
}

.app-button div {
    font-size: 12px;
}

.app-button div strong {
    font-size: 14px;
    display: block;
}

.bottom-footer {
    text-align: center;
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--gray);
    font-size: 14px;
}

/* Mobile Menu */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--dark);
    cursor: pointer;
}

.mobile-menu {
    position: fixed;
    top: 0;
    left: -280px;
    width: 280px;
    height: 100%;
    background-color: white;
    z-index: 1000;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
    transition: left 0.3s ease;
    overflow-y: auto;
}

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

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

.mobile-menu-close {
    background: none;
    border: none;
    font-size: 24px;
    color: var(--dark);
    cursor: pointer;
}

.mobile-menu-items {
    padding: 15px;
}

.mobile-menu-category {
    margin-bottom: 20px;
}

.mobile-menu-category h3 {
    font-size: 16px;
    margin-bottom: 10px;
    color: var(--dark);
}

.mobile-menu-links {
    list-style: none;
}

.mobile-menu-links li {
    margin-bottom: 10px;
}

.mobile-menu-links a {
    color: var(--dark);
    text-decoration: none;
    font-size: 14px;
    display: block;
    padding: 8px 0;
}

.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 999;
    display: none;
}

.overlay.active {
    display: block;
}

/* Responsive */
@media (max-width: 992px) {
    .product-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    }
    
    .category-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    }
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: block;
    }
    
    .search-bar {
        margin: 0 10px;
    }
    
    .header-actions {
        display: none;
    }
    
    .nav-categories {
        padding: 10px;
        gap: 15px;
    }
    
    .banner {
        height: 200px;
    }
    
    .banner-content h1 {
        font-size: 24px;
    }
    
    .banner-content p {
        font-size: 14px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

@media (max-width: 576px) {
    .logo {
        font-size: 20px;
    }
    
    .top-header {
        padding: 8px 10px;
        font-size: 12px;
    }
    
    .main-header {
        padding: 10px;
    }
    
    .search-bar input {
        padding: 8px 15px;
        font-size: 14px;
    }
    
    .search-bar button {
        padding: 6px 10px;
        font-size: 12px;
    }
    
    .banner {
        height: 150px;
        margin: 10px;
    }
    
    .banner-content {
        left: 20px;
    }
    
    .banner-content h1 {
        font-size: 20px;
    }
    
    .banner-content p {
        font-size: 12px;
        margin-bottom: 10px;
    }
    
    .banner-btn {
        padding: 8px 15px;
        font-size: 12px;
    }
    
    .flash-sale, .categories, .featured-products {
        margin: 10px;
        padding: 15px;
    }
    
    .section-title {
        font-size: 18px;
    }
    
    .product-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .category-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}