body {
    background-image: url(../img/ceruza.jpg);
    background-repeat: no-repeat;
    background-size: cover;
    background-position: top;
    
} 
    
#nagykep {
    background-color: rgb(214,214,216);
   /* background-image: url(../img/autism.jpg);
    background-repeat: no-repeat;
    background-size: 100%;
    background-origin: none;
    background-position: center; */
}

#csoportok {
    margin-left: 15%;
    margin-top: 5%;
    
}