html,
body,
header,
#intro {
    height: 90%;
}

#intro {
    background: url("../img/logo.png");
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    /* Center and scale the image nicely */
    background-position: center;

}

.top-nav-collapse {
  background-color: #212121;
}
@media (max-width: 768px) {
  .navbar:not(.top-nav-collapse) {
    background-color: #212121;
  }
}

@media (min-width: 800px) and (max-width: 850px) {
  .navbar:not(.top-nav-collapse) {
    background-color: #212121;
  }
}