Hello,
Please add code in cusrom css:
1.
.single-product .product-information .price {
font-size: 18px;
}
2.
.single-product .quantity input[type=number] {
width: 50px !important;
}
3.
.single-product .product-information .cart button[type=submit]:hover {
border: 1px solid #000000;
line-height: 37px !important;
}
.single-product .product-information .cart button[type=submit] {
line-height: 37px !important;
}
Regards