.fixed{
    position: fixed;
    right: 5%;
    bottom: 5%;
    background-color: #02c65a;
    width: 3vw;
    height: 3vw;
    border-radius: 50%;
    z-index: 99999;
}

/* mobile */
@media screen and (max-width: 767px){ 
    .fixed{
        width: 10vw;
        height: 10vw; 
    }

}
/* tablet */
@media screen and (min-width: 768px) and (max-width: 1024px){
    .fixed{
        width: 5vw;
        height: 5vw; 
    }
    
}