Product Page Add To Cart Alignment

Could you do a screenshot with an arrow pointing what piece you want where with a link to that page so that we can provide you with the corresponding CSS ?

You can do that by adding the CSS below in the front end CSS file of HikaShop via the Display tab of the configuration:

.hikashop_product_right_part {
padding-top: 250px;
}
#hikashop_product_price_main span.hikashop_product_price{
font-size: 18px !important;
}