.to-top {
    background-color: #FFFFFF;
    display: inline-block;
    height: 40px;
    width: 40px;
    border-radius: 50%;
    position: fixed;
    bottom: 10px;
    right: 10px;
    box-shadow: 0 0 2px #777777;
}

.to-top a {
    display: inline-flex;
    height: 100%;
    width: 100%;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    color: #8FAADC;
}

.to-top span {
    font-size: 25px;
}