body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 1em;
}

header {
  background-color: #333;
  color: #fff;
  padding: 1em;
  text-align: center;
}

main {
  padding: 1em;
}

article {
  margin-bottom: 20px;
}

h1, h2 {
  color: #333;
}