body {
    font-family: Arial, sans-serif;
    background-color: #f4f6f8;
    margin: 0;
    padding: 0;
}

/* Layout trên */
.product-container {
    max-width: 1000px;
    margin: 40px auto;
    display: flex;
    gap: 30px;
    background: #fff;
    padding: 30px;
    border-radius: 8px;
}

.product-image img {
    width: 100%;
    height: 350px;
    object-fit: cover;
    border-radius: 6px;
}

.product-image {
    flex: 1;
}

.product-info {
    flex: 1;
}

.product-title {
    font-size: 28px;
    margin-top: 0;
}

.product-date {
    color: #888;
    font-size: 14px;
    margin-bottom: 20px;
}

.buy-btn {
    padding: 12px 20px;
    background: #007bff;
    color: #fff;
    text-decoration: none;
    border-radius: 4px;
}

/* Tabs dưới */
.product-tabs {
    max-width: 1000px;
    margin: 20px auto 60px;
    background: #fff;
    border-radius: 8px;
}

.tab-header {
    display: flex;
    border-bottom: 1px solid #ddd;
}

.tab-btn {
    padding: 14px 20px;
    cursor: pointer;
    background: none;
    border: none;
    font-size: 15px;
}

.tab-btn.active {
    border-bottom: 3px solid #007bff;
    font-weight: bold;
}

.tab-content {
    padding: 20px;
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
}

.product-price {
    font-size: 18px;
    margin-bottom: 20px;
    color: #d32f2f;
}