Plugin messes my woocommerce css

On a product page, +/- buttons next to cart were improperly shown due to a code in this plugin:

button, input[type=”submit”], input[type=”reset”], input[type=”button”], .button a, .button.medium a {
padding: 0.5em 1em !important;
font-size: 1em !important;
line-height: 1em !important;
margin-bottom: 0px !important;

In smpl-shortcodes.css:1. The main culprit is padding 1em, when I delete 1, +/- buttons go back to normal. Of course disabling this plugin gets rid of the issue as well.

Since this plugin is no longer updated although other plugins evolve strongly, I prefer to disable it.

https://ww.wp.xz.cn/plugins/smpl-shortcodes/