#backToTopBtn {
    display: flex; 
    align-items: center;
    justify-content: center;
    position: fixed;    
    bottom: 1vh;
    right: 0.5vw;
    z-index: 99;
    border-style: solid;
    border-color: #101a31;
    background-color: #101a31;
    color: white;
    cursor: pointer;
    padding:1%;
    border-radius: 10px;
    display: none;
}

#backToTopBtn:hover {
    border-color: aquamarine;
    color: aquamarine;
}


#backToTopBtn i {
    margin: 0;
    padding: 0;
    line-height: 1; 
}