ul#mainNav {
  list-style: none !important;
  font-size: 1.5em;
}

ul#mainNav a {
  text-decoration: none;
  color: black;
  outline: none;
}

ul#mainNav a::after {
  content: ' →';
}

ul#mainNav a:hover {
  color: red;
}

ul#mainNav li ul {
  font-size: 16px;
}