#box_7{
display:none;
}
@media(max-width:999px){
  #box_7{
  display:block;
  background-image:url("/rezerwacje/slider/slide-2.jpg");
    background-size:cover;
    background-position:center;
  width:100%;
    height:600px;
  }
}
#itstart-topmenu-horizontal-1 > nav > button > span{
filter:invert(1) !important;
}