.upp{
    display: none;
    padding: 15px;
    background: rgba(255, 0, 0, 0.52);
    font-size: 23px;
    color:white;
    border-radius: 50%;
    cursor: pointer;
    position: fixed;
    bottom: 35px;
    right: 25px;
    z-index: 10;
}