gnucode.me/css/header.css

header {
  background-color: #292929;
  padding: 1em; }
  header ul {
    list-style: none;
    display: flex; }
    header ul li {
      padding-left: 1em; }
  header a {
    color: #378169;
    text-decoration: none;
    font-size: 20px; }
  header a:hover {
    color: #DAF0EE;
    text-decoration: underline; }

@media (max-width: 800px) {
  header a {
    color: #378169;
    text-decoration: none;
    font-size: 30px; } }