.ir-arriba {
    display: inline-block;
    font-size: 20px;
    background-color: #0d532e;
    border-radius: 8px;
    border: 1px solid #0f4628;
    color: #fff;
    cursor: pointer;
    position: fixed;
    bottom: 15px;
    right: 30px;
    z-index: 100;
    
}

@media only screen and (max-width: 480px) {
    .ir-arriba {
        left: calc(100% - 64px);
        /* bottom: 59vh;
        right: 12px;
        right: 61vw; */
        bottom: 1rem;
        right: 1rem;
    }
}