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

/* ===== HEADER ===== */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 40px;
    background-color: #111;
    color: #fff;
}

.logo {
    font-size: 24px;
    font-weight: bold;
}

.menu a {
    color: #fff;
    margin-left: 20px;
    text-decoration: none;
}

.menu a:hover {
    color: #f39c12;
}

/* ===== BANNER ===== */
.banner {
    background: linear-gradient(to right, #000, #444);
    color: #fff;
    text-align: center;
    padding: 80px 20px;
}

.banner h1 {
    font-size: 40px;
    margin-bottom: 10px;
}

.banner button {
    margin-top: 20px;
    padding: 12px 30px;
    border: none;
    background: #f39c12;
    color: #fff;
    font-size: 16px;
    cursor: pointer;
}

/* ===== CATEGORY ===== */
.category {
    padding: 60px 20px;
    text-align: center;
}

.category h2 {
    margin-bottom: 30px;
}

.category-list {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.category-item {
    padding: 15px 30px;
    border: 1px solid #ddd;
    cursor: pointer;
}

.category-item:hover {
    background-color: #f39c12;
    color: #fff;
}

/* ===== PRODUCTS ===== */
.products {
    padding: 60px 20px;
    background-color: #f5f5f5;
    text-align: center;
}

.products h2 {
    margin-bottom: 40px;
}

/* GRID 4 SẢN PHẨM / HÀNG */
.product-list {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    max-width: 1200px;
    margin: auto;
}

/* CARD TO & ĐẸP */
.product-card {
    background: #fff;
    padding: 25px;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

/* ẢNH */
.product-card img {
    width: 100%;
    height: 240px;
    object-fit: contain;
    margin-bottom: 15px;
}

/* TÊN & GIÁ */
.product-card h3 {
    font-size: 16px;
    margin-bottom: 5px;
}

.product-card p {
    font-weight: bold;
    margin-bottom: 10px;
}

/* BUTTON */
.product-card button {
    padding: 10px;
    width: 100%;
    border: none;
    background-color: #111;
    color: #fff;
    cursor: pointer;
}

.product-card button:hover {
    background-color: #f39c12;
}

/* ===== FOOTER ===== */
.footer {
    background: #111;
    color: #fff;
    text-align: center;
    padding: 20px;
}

/* ===== SOLD OUT BADGE ===== */
.product-card {
    position: relative;
}

/* HÀNG BADGE */
.badge-row {
    position: absolute;
    top: 10px;
    left: 10px;
    display: flex;
    gap: 8px;
    z-index: 2;
}

.badge {
    background: #000;
    color: #fff;
    font-size: 12px;
    padding: 4px 8px;
    text-transform: uppercase;
}

/* SOLD OUT STYLE */
.product-card.sold {
    opacity: 0.6;
}