* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
}

body {
    background-color: #f5f5f5;
    padding: 20px;
    display: flex;
    justify-content: center;
}

.shop-container {
    width: 100%;
    max-width: 960px;
    background-color: #ffffff;
    border: 1px solid #ddd;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

.shop-header {
    background-color: #333333;
    color: #ffffff;
    text-align: center; /* Ghi 1 lần duy nhất ở đây */
    padding: 20px 10px;
    border-bottom: 1px solid #444;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.shop-header h1 {
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 5px;
}

.shop-header p {
    font-size: 11px;
    color: #aaa;
}

.shop-navbar {
    background-color: #444444;
    position: relative;
    z-index: 100;
}

.nav-menu {
    list-style: none;
    display: flex;
    justify-content: center;
}

.nav-menu > li {
    position: relative;
}

.nav-menu > li > a {
    display: block;
    padding: 12px 25px;
    color: #ffffff;
    text-decoration: none;
    font-size: 13px;
    font-weight: bold;
    transition: background-color 0.2s;
}

.nav-menu > li:hover > a {
    background-color: #222222;
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: #555555;
    list-style: none;
    min-width: 150px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
}

.dropdown-menu li a {
    display: block;
    padding: 10px 15px;
    color: #ffffff;
    text-decoration: none;
    font-size: 12px;
    border-bottom: 1px solid #666;
    transition: background-color 0.2s;
}

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

.dropdown-menu li a:hover {
    background-color: #222222;
}

.dropdown:hover .dropdown-menu {
    display: block;
}

/* Khu vực danh sách sản phẩm */
.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
    padding: 20px;
}

.product-card {
    border: 1px solid #e0e0e0;
    border-radius: 4px;
    padding: 12px;
    text-align: center;
    background-color: #ffffff;
    transition: transform 0.2s, box-shadow 0.2s;
}

.product-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.product-card img {
    width: 100%;
    aspect-ratio: 1 / 1;
    object-fit: contain;
    margin-bottom: 10px;
    background-color: #fafafa;
}

.product-card h3 {
    font-size: 12px;
    color: #333;
    margin-bottom: 6px;
    height: 32px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.product-card .price {
    font-size: 11px;
    color: #28a745;
    font-weight: bold;
    background-color: #e8f5e9;
    padding: 4px 0;
    border-radius: 2px;
    margin-bottom: 10px;
}

/* Thiết lập cho nút bấm dạng thẻ a */
.add-to-cart-btn {