body { margin: 20px; }
.container { 
  width: 240px;
  #text-align: center
}

h1 { 
  height: 60px; 
  padding: 0;
  margin: 0;
}
h2 { 
  height: 40px; 
  padding: 0;
  margin: 0;
}

  p { display: inline-block; }
  .font-size-label { margin-right: 20px; }
  #font-size { margin: 0 5px; }
  button { 
    width: 30px;
    height: 30px;
  }