*
  {
  box-sizing: border-box;
  font-family: system-ui, sans-serif;
  font-size: 16px;
  font-weight: 300;
  margin: 0;
  padding: 0;
  }

html, body
  {
  height: 100%;
  }

h1
  {
  font-size: 50px;
  font-weight: 900;
  color: #7cc;
  text-align: center;
  }

h2
  {
  font-size: 20px;
  font-weight: 600;
  color: #277;
  text-align: center;
  }

main
  {
  display: flex;

  flex-flow: row wrap;

  justify-content: space-around;
  }

main button
  {
  width: 300px;
  height: 100px;
  padding: 10px;
  background-color: #ddd;
  border: solid 1px grey;
  }