/* TOP btn */
#top-btn{
    position: fixed;
    text-decoration: none;
    color: white;
    /* border: 1px solid black; */
    background-color: #9c0cbd;
    bottom: 6vh;
    right: 3vh;
    border-radius: 50%;
    height: 3rem;
    width: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

@media screen and (max-width : 450px) {
    #top-btn{
        bottom: 4vh;
        right : 2vh;
    }

}