#right_cta{
position:fixed;
right: 0;
top: 50%;
transform: translateY(-50%);
width: 50px;
aspect-ratio: 50/277.5;
z-index: 99999;
}
 #right_cta a{
    display: block;
}

 #right_cta a img{
    max-width: 100%;
    height: auto;
    width: 100%;
 }
@media screen and (max-width: 640px) {
    #right_cta{
        display: none;
    }
}