.catalog-product-view .product-info-main .box-tocart .actions{
width: 400px;
}
.catalog-product-view .product-info-main .box-tocart .actions .tocart{
    float: left;
}
.catalog-product-view .product-add-form .box-tocart .actions .btn.buynow {
    display: inline-block;
    margin-right: 1rem;
    padding: 19px 50px;
}

.catalog-product-view .product-add-form .box-tocart .actions .btn.buynow,
.catalog-product-view  button.btn-cart:hover
{
    border-color: #ff1341;
    background-color: #ff1341;
    color: #fff;
}
.catalog-product-view  button.btn-cart,
.catalog-product-view .product-add-form .box-tocart .actions .btn.buynow:hover {
    border-color: #222;
    background-color: #222;
    color: #fff;
}

@media (max-width: 768px){
    .catalog-product-view .product-add-form .box-tocart .actions .btn.buynow {
        margin-bottom: 15px;
        margin-right: 0;
        width: 100%;
        margin-top: 10px
    }
    .catalog-product-view .product-info-main .box-tocart .actions{
        width: 100%;
    }
}