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

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

.hero{
    width:100%;
    height:100vh;

    background-image:url("a2.jpg");
    background-repeat:no-repeat;
    background-position:center;
    background-size:contain;
}

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

    .hero{
        width:100%;
    min-height:100vh;
        
        background-image:url("a2mobile.jpg");
         background-repeat:no-repeat;
    background-position:center;
    background-size:contain;
    }

}