.chitietsanpham {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px;
    align-items: start;
}

.img-chitiet {
    width: auto;
    float: none;
    margin-left: 0;
}

.img-chitiet img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    border-radius: 12px;
    border: 1px solid #e6eadf;
}

.title-chitiet {
    width: auto;
    float: none;
    text-align: left;
}

.title-chitiet span {
    color: var(--text-muted);
    font-size: 0.92rem;
}

.title-chitiet span:hover {
    color: var(--text-strong);
}

.title-chitiet hr {
    border: 1.5px solid gainsboro;
    width: 50px;
    margin: 0 0 12px;
}

.title-chitiet p {
    color: var(--color-primary-dark);
    font-weight: 600;
    font-size: 1.45rem;
    margin: 0 0 14px;
}

.title-chitiet u {
    font-size: 1rem;
}

.product-highlights {
    list-style: none;
    padding: 0;
    margin: 0 0 18px;
    display: grid;
    gap: 8px;
}

.product-highlights li {
    position: relative;
    padding-left: 26px;
}

.product-highlights li::before {
    content: "✓";
    position: absolute;
    left: 0;
    top: 0;
    color: var(--color-primary-dark);
    font-weight: 700;
}

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

.quantity-btn {
    cursor: pointer;
    width: 40px;
    height: 40px;
    border: 1px solid #cfd5ca;
    border-radius: 8px;
    background-color: #fff;
    transition: background-color 0.2s ease;
}

.quantity-btn:hover {
    background-color: #edf3e7;
}

#soluong {
    width: 56px;
    text-align: center;
    height: 40px;
    border: 1px solid #cfd5ca;
    border-radius: 8px;
}

input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

input[type="number"] {
    -moz-appearance: textfield;
}

.submit-btn {
    padding: 10px 18px;
    min-height: 40px;
    background-color: var(--color-accent);
    color: #fff;
    border: 1px solid transparent;
    border-radius: 999px;
    cursor: pointer;
    margin-left: 0;
    font-weight: 600;
}

.submit-btn:hover {
    background-color: #b85a3a;
}

hr.separator {
    width: 100%;
    border: none;
    height: 1px;
    background-color: #d9ddd3;
    margin: 0;
}

.mo_ta_san_pham {
    padding-top: 20px;
    clear: both;
    text-align: left;
}

.mo_ta_san_pham h1 {
    padding-top: 0;
    margin: 0 0 12px;
    font-size: 1.7rem;
}

.mo_ta_san_pham p {
    font-size: 1rem;
}

.mo_ta_san_pham img {
    margin: 20px auto;
    width: min(100%, 720px);
    border-radius: 12px;
}

#product-list {
    width: 100%;
    margin-top: 30px;
}

#product-list h1 {
    margin: 16px 0 18px;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
    gap: 18px;
}

#product-list .products-list-item {
    width: auto;
    padding: 0;
    float: none;
}

.products-list-item-img {
    overflow: hidden;
    width: 100%;
    aspect-ratio: 4 / 3;
}

.products-list-item-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.products-list-item-img:hover img {
    transform: scale(1.08);
}

@media (max-width: 900px) {
    .chitietsanpham {
        grid-template-columns: 1fr;
    }
}