nav {
  width: 100%;
  height: 50px;
  position: fixed;
  background: var(--background);
  color: var(--foreground);
  top: 0;
}

ul {
  display: flex;
  justify-content: space-around;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: nowrap;
}

li {
  margin: 0 10px;
}

img {
  height: 50px;
}

#highlight {
  font-size: 1.2em;
  background: var(--foreground);
  color: var(--background);
  padding: 5px 10px;
  border-radius: 5px;
}

@media screen and (max-width: 650px) {
  nav {
    height: 100px;
  }
  ul {
    flex-wrap: wrap;
  }
  #highlight {
    font-size: 1em;
    color: var(--foreground);
    background: transparent;
  }
}