body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  margin: 0;
  padding: 0;
  background: #f4f4f4;
  color: #333;
}

a:link, a:visited {
  color: #333;
  text-decoration: none;
}

header, nav, main, footer {
  padding: 20px;
}

header {
  text-align: center;
}

article {
  background: #fff;
  padding: 20px;
  margin-bottom: 20px;
}

footer {
  text-align: center;
}

.article-list li {
  margin: 10px 0;
}

.article-list li a {
  text-decoration: none;
  color: #333;
}

.article-list li a:hover {
  color: #0275d8;
}