body{
    margin: 0;
}

a{
    text-decoration: none;
    color:black;
}

.row_center{
    text-align: center;
}

.col_center{
    display:flex;
    flex-direction:column;
    justify-content:center; 
    align-items: center;
}



.flex{
    display:flex;
}

.shadow{
    box-shadow: 0 8px 39px 0 rgba(0, 0, 0, 0.37);
}

@media screen and (max-width: 619px) {
    .little_window_one{
        display: none;
    }
}


@media screen and (max-width: 924px) {
    .little_window_two{
        display: none;
    }
}