.nav-link:hover {
  color: #4daade;
  background: #4daade;
}

.nav-link:focus {
  color: #ffffff;
  background: #4daade;
}

*, *:before, *:after {
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
}

#navbar {
  overflow-y: auto;
}