body {
  font-family: sans-serif;
  background: #f9f9f9;
  color: #333;
  margin: 0;
  padding: 0;
}

header, footer {
  background: #222;
  color: #fff;
  text-align: center;
  padding: 1em 0;
}

main {
  padding: 1em;
}

.app-list article {
  background: #fff;
  padding: 1em;
  margin: 1em auto;
  border-radius: 8px;
  box-shadow: 0 0 5px rgba(0,0,0,0.1);
  max-width: 600px;
}

.app-list h2 a {
  color: #0066cc;
  text-decoration: none;
}

.app-list h2 a:hover {
  text-decoration: underline;
}