#subir__arriba {
    width: 50px;
    height: 50px;
    background: rgb(187, 187, 187);
    color: #A04000;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 30px;
    position: fixed;    
    left: 10px;
    bottom: 10px;
    border-radius: 50px;
    cursor: pointer;
    display: none;}

html{
    scroll-behavior: smooth;}