body 
{
   background-image:url(/img/ArkaPlan.jpeg)
}
 #siteGiris{
    background-color:Whitesmoke;
     box-shadow:#000000 0 0 10px;
     border-radius:10px 10px;
     margin-top:5px;
     margin-bottom:20px;
     text-align:center;
     height:350px;
     width:450px;
     
}