Refining Joomshopping Form Styles

It is necessary for the site on Jooml+Joomshopping to refine the styles and part of the PHP code to display the form with options (not the modal window, but the form link!) (increase the order button, etc.).
There are some bugs in working with the fields.
Here's what's now: Testo nascosto
It is advisable to get something similar: Testo nascosto

Also consider the display for smartphones
In the image d3.jpg - what is desirable to achieve.

Ps. In the folder of the current template, styles in .less format (sj_megashop/less/jshopping.less)
Output of the product card in sj_megashop/html/com_jshopping/product/product_default.php