* {
  font-family: arial;
}

body {
  color: #111111;
  background-color: white;
}

h2,
h3 {
  color: #000000;
  background-color: white;
  text-align: center;
}

nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  color: #000000;
  background-color: #dddddd;
  text-align: center;
  width=100%;
  padding: 0.1em;
}

nav a {
  background-color: white;
  margin: 0;
  padding: 0.5em;
}

nav a:link {
  color: #0000FF;
}

nav a:visited {
  color: #000066;
}

header,
main {
  max-width: 1000px;
}

.container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  background-color: white;
}

@media (max-width: 800px) {
  .container {
    flex-direction: column;
  }
}

.container > article {
  background-color: white;
}