.gf-waf-btn{
  position:fixed;
  width:var(--gf-waf-size,56px);
  height:var(--gf-waf-size,56px);
  border-radius:999px;
  background:#25D366;
  box-shadow:0 10px 28px rgba(0,0,0,.25);
  display:flex;
  align-items:center;
  justify-content:center;
  text-decoration:none;
  transform: translateZ(0);
}
.gf-waf-btn:hover{ filter:brightness(1.05); }
.gf-waf-btn:active{ transform: translateZ(0) scale(.98); }
.gf-waf-ico{
  width: calc(var(--gf-waf-size,56px) * .62);
  height: calc(var(--gf-waf-size,56px) * .62);
  fill:#fff;
}
@media (max-width: 420px){
  .gf-waf-btn{
    width:var(--gf-waf-size,52px);
    height:var(--gf-waf-size,52px);
  }
}