.to-top {
    background-color: #BF5223;
    position: fixed;
    bottom: 16px;
    right: 30px;
    width: 40px;
    height: 40px;
    border-radius: 10%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    color: #fff;
    transition: all .4s;
    pointer-events: none;
    text-decoration: none;
    border: none;
    z-index: 2000;
    cursor: pointer;
    opacity: 0; /* Desaparece con la opacidad*/
}

.to-top.active {
    bottom: 32px;
    pointer-events: auto;
    opacity: 1;
}