@media only screen and (max-width: 768px)
{
    /* For mobile phones: */


    #Image1
    {
       
       max-width: 100%;
       height: auto;
       
    }
    .left
    {
        display: none;
    }


    .content.middle
    {
        
        
        width: 100%;
    }

    .right
    {
        display: none;
    }
    .items
    {
        display: none;
    }
    .content
    {
        float: none;
        padding: 3px;
    }
    .step
    {
        display: none;
    }
}

*
{
    box-sizing: border-box;
}