body {
background-image: url(/conf-data/konferencja-pss/images/T%C5%82o_Strona%20poziom.jpg);
background-position: center;
background-size: contain;
background-attachment: fixed;
background-repeat: repeat;
}

.navbar-inverse {
background-image: url(/conf-data/konferencja-pss/images/T%C5%82o_Strona%20poziom.jpg);
  background-position: center;
  background-size: contain;
  background-attachment: fixed;
  background-repeat: repeat;
}