*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}

html,body{
    width:100%;
    height:100%;
    overflow:hidden;
    background:#000;
}

.background{
    position:fixed;
    inset:0;
    width:100vw;
    height:100vh;

    background-image:url("background.jpg");
    background-repeat:no-repeat;
    background-position:center center;
    background-size:cover;
}

/* Telefon */
@media (max-width:768px){

    .background{
        background-image:url("background2.jpg");
        background-position:center top;
        background-repeat:no-repeat;
        background-size:cover;
    }

}

/* Tablet */
@media (min-width:769px) and (max-width:1200px){

    .background{
        background-image:url("background.jpg");
        background-position:center center;
        background-repeat:no-repeat;
        background-size:cover;
    }

}

/* Masaüstü */
@media (min-width:1201px){

    .background{
        background-image:url("background.jpg");
        background-position:center center;
        background-repeat:no-repeat;
        background-size:cover;
    }

}