Hello,
Try adding the following to your custom.css file:
@media screen and (max-width: 525px) {
.btn, .button, button, .readon, p.readmore a, a.k2ReadMore, .userItemReadMore, div.catItemCommentsLink, .userItemCommentsLink, a.readmore-link, a.comments-link, div.itemCommentsForm form input, #s5_mason_load_more {
padding: 14px 5px;
margin-left: -6px;}
}