.to-top {
    position: fixed;
    right: 20px;
    bottom: 50px;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
    z-index: 999;
}

.to-top:before {
    content: "";
    position: absolute;
    top: 10px;
    left: 9px;
    width: 12px;
    height: 12px;
    border-top: 2px solid #fff;
    border-right: 2px solid #fff;
    transform: rotate(-45deg);
}

.to-top:after {
    content: "";
    position: absolute;
    top: 15px;
    left: 9px;
    width: 13px;
    height: 2px;
    background-color: #fff;
    transform: rotate(90deg);
}

.to-top:hover {
    background-color: #555;
}

.to-top.active {
    opacity: 1;
}

@media only screen and (max-width: 500px) {
    .to-top {
        right: 8px !important;
    }
}