@media (max-width: 767px) {
  body {
    padding-top: 45px;
  }
  .navbar-collapse {
    background-color: #FFF;
  }
  .navbar-default {
    height: 45px;
    padding-top: 0px;
  }
  .hero-unit {
    padding: 40px 0;
  }
  .hero-unit p {
    font-size: 1.3em;
  }
}
/* Smartphones (portrait) ----------- */
@media (min-width: 1200px) {
  .hiding {
    opacity: 0;
  }
  .visible {
    opacity: 1;
  }
}