@media(max-width:768px) {
    #d_Navigation { width:100%; padding-top:0px; height:auto; top:-530px; display:none; } 
    #lbl_Version_Number { display:none; }
    #d_Header { box-shadow:none; height:50px; line-height:50px; }
    #d_Navigation a { width:100%; text-align:center; }
    #d_Site_List { width:100%; text-align:center; margin-bottom:0px;}
    #d_Site_List select { text-align:center;}
    #d_Mobile_Navigation_Toggle { display:inline-block; }
    #d_Navigation_Toggle { display:none; }
    #d_Main_Content { left:0px; width:100%; top:50px; height:calc(100% - 50px); }
    #lbl_Mobile_Version_Number { display:inline-block; }
    #a_Save_Changes { position:initial; }
}