@media (orientation: portrait) {
    body {
        background-image:url('../img/soieBlancPortrait.jpg');
        background-size:100% 100%;
        background-position:top center;
    }
}
@media only screen and (max-width:992px)
{
    .navbar-brand 
    {
        display:none;
    }
    li.nav-item
    {
        display:block;
    }
    .startIndex
    {
        width:100%;
        display:block;    
    }
}