main {
  text-align: center;
}

footer svg {
  vertical-align: center;
}

article img {
  display: inline;
  margin: 0 5px 0 0;
  width: 20px;
  vertical-align: center;
}

article a {
  margin: 5px auto 10px;
  padding: 10px;
  text-decoration: none;
  display: block;
  width: 150px;
  border: 1px solid;
  border-radius: 4px;
}

article a:hover {
  text-decoration: none;
}