body {
  font-family: Arial, sans-serif;
  background: #f9f9f9;
  color: #333;
  line-height: 1.6;
  margin: 0;
  padding: 0;
}

#skip-links {
  position: absolute;
  left: -10000px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

#skip-links a:focus {
  position: static;
  width: auto;
  height: auto;
  background: black;
  color: white;
  display: block;
  padding: 10px;
}

header, nav, main, footer {
  padding: 20px;
  margin: 0 auto;
  max-width: 800px;
  background: white;
}

nav ul {
  list-style: none;
  padding: 0;
}

nav li {
  display: inline-block;
  margin-right: 10px;
}

img {
  max-width: 100%;
  height: auto;
}

ul {
  list-style: disc;
  padding-left: 20px;
}