Hi,
You will have to customize your CSS (
www.hikashop.com/support/support/documen...ize-the-display.html
) to change/add some rules.
My suggestion will be to change the "line-height" (or margin/padding) for the class "hikashop_product_stock".
The button container does not react correctly but it's because of some of CSS rules of your template, so you have to fix it using custom CSS (in HikaShop or in your template).
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.