body {
  font-family: Arial, Helvetica, sans-serif;
  background: #fafafa;
  color: #222;
  margin: 0;
  line-height: 1.6;
}

header {
  text-align: center;
  padding: 40px 20px;
  background: #ffffff;
  border-bottom: 1px solid #e5e5e5;
}

header h1 {
  margin: 0;
  font-size: 2rem;
}

.lista-artigos {
  max-width: 800px;
  margin: auto;
  padding: 20px;
}

article {
  background: white;
  padding: 20px;
  margin-bottom: 20px;
  border-radius: 12px;
  border: 1px solid #ddd;
}

article h2 {
  margin-top: 0;
}

a {
  color: #0077ff;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

footer {
  text-align: center;
  padding: 30px;
  font-size: 14px;
  color: #666;
}