Need help formatting Google Play Store and Apple App Store buttons

Site URL: https://www.gelbspanmethod.com/

I've been trying to format the Google Play Store and Apple App Store buttons so when on a mobile device, the icons stay side-by side, similar to on desktop. Now on mobile, or even iPad, they stack (see images).

The GG Play has a spacing (inside image) on top/bottom.

Add to Design > Custom CSS

@media screen and (max-width:991px) {
div#block-yui_3_17_2_1_1635733303914_4778>div>a {
    width: 50% !important;
    float: left !important;
}
}