#maincontainer {
    display: flex;
    flex-direction: column;
    height: 100%;
}



#container3D{
 
    position: relative;
    
    flex:auto;
    border: none;
    background-color: #999999;
    /*border: 1px solid grey;*/
}

#container3D canvas{
    height: 100%;
    vertical-align: top;
    outline: none;
    -webkit-tap-highlight-color: rgba(255, 255, 255, 0); /* mobile webkit */

}

#instructions{
    text-transform: uppercase;
    font-family: "Styrene B Web",sans-serif;
    font-style:   italic;
    font-stretch: normal;

    position: absolute;
    top:23px;    /* 11 px + 53 px */
    left: 108px;  
    font-size: 12px;
    line-height: 16px;
    text-decoration: none;
    min-width: 500px;
    
}