:root {
  --background-color: #222;
  --text-color: #ddd;
  --link-color: #ddd;
  --link-hover-color: #fff;
}

html {
}

body {
  margin: auto;
  width: 80%;
  background-color: var(--background-color);
  color: var(--text-color);
}

.main-navigation {
  margin-top: 3vh;
  border-bottom: 1px #888 solid;
}

.main-navigation > ul, ol {
  display: flex;
  justify-content: flex-end;
  align-items: flex-start;
}

.main-navigation li {
  list-style: none;
  margin: 10px;
}

.main-navigation li a {
  text-decoration: none;
  border: none;
  border-radius: 3px;
  color: var(--link-color);
}

.main-navigation li a:hover {
  color: var(--link-hover-color);
}


@media (max-width: 400px) {
  .main-navigation > ul, ol{
    justify-content: center;
    align-items: center;
  }

  .main-navigation li {
    magin: 3px;
  }
}