@charset "UTF-8";
body {
  font-size: 16px;
  line-height: 1.4;
  padding: 10px;
}

h1 {
  font-size: 20px;
  margin-bottom: 10px;
}

nav h3 {
  font-size: 18px;
  margin-top: 10px;
}

nav h4 {
  font-size: 16px;
  margin-top: 10px;
  padding: 5px 10px;
  color: #444;
}


nav ol {
  padding-left: 20px;
}

nav li {
  margin-bottom: 5px;
}

a {
  display: block;
  padding: 10px;
  margin: 5px 0;
  background-color: #e0e0e0;
  color: #000;
  text-decoration: none;
  border-radius: 5px;
  text-align: center;
}

a:hover {
  background-color: #d0d0d0;
}

@media (max-width: 320px) {
  body {
    font-size: 14px;
  }

  h1 {
    font-size: 18px;
  }

  nav h3 {
    font-size: 16px;
  }

  a {
    padding: 8px;
    margin: 3px 0;
  }
}