#navbar {
  position: absolute; 
  z-index: 2; 
  width: 100%;
}

.videockbackground {
max-width: none;
}

.istopfixed #block3 ul.nav > li > a, #block3 ul.nav > li > span.separator,
.istopfixed #block3 ul.nav > li.active > a, #block3 ul.nav > li.active > span.separator {
  color: black;
}

.istopfixed #navbar > .inner {
background: #fff; 
  box-shadow: 0 2px 4px 0 rgba(0,0,0,.2);
}

#navbar > .inner {
  transition: background 0.8s;
}