CSS help with Gofundme embed

Hi,

I am trying to style the “Donate Now” button of a Gofundme campaign, embedded via code.

I’ve tried the following but without success. Any help would be appreciated. Cheers,

/* donation */
.gfm-embed a.o-campaign-embed-button.exp-gradient-gfm.exp-gradient-gfm--donate.ml0.mr0.a-button.a-button--max-full.a-button--large.a-button--solid-yellow.a-link {
    background: green!important;
}