.d-mob {
    display: none;
}
.d-desct{
    display: block;
}
img {
    width: 100%;
    height: 100vh;
    object-fit: cover;
}
body {
    margin: 0; 
    
}
body .d-desct.h-100{
    height: 100vh;
    background-image: url("/fon.jpg");
    background-repeat: no-repeat;
    background-position: center;
    background-size: cover;
}
body .d-mob.h-100{
    height: 100vh;
    background-image: url("/fon1.jpg");
    background-repeat: no-repeat;
    background-position: center;
    background-size: cover;
}
img.logo{
    position: relative;
    display: block;
    width: 517px;
    object-fit: contain;
    object-position: center;
    margin: 0 auto;
}
@media (max-width: 768.00px) {
    .d-mob {
        display: block;
    }
    .d-desct{
        display: none;
    }
    img.logo{
    position: relative;
    display: block;
    width: 275px;
    object-fit: contain;
    object-position: center;
    margin: 0 auto;
}
}