body {
  color: #3DBA36;
  font-family: 'Brush Script MT', cursive;
}

.mainbox {
  display: inline-block;
  position: relative;
  color: #3DBA36;
  background-color: #1AFF00;
  text-align: center;
  width: 890px;
  height: 1000px;
  padding: 50px;
  border: 5px solid #47D400;
  left: 10px;
  font-family: 'Brush Script MT', cursive;
}

.sidebox {
  display: inline-block;
  position: relative;
  color: #3DBA36;
  background-color: #1AFF00;    
  text-align: center;
  width: 200px;
  height: 500px;
  padding: 50px;
  border: 5px solid #47D400;
  left: 8px;
  font-family: 'Brush Script MT', cursive;
}

.button {
  background-color: lime;
  color: #277500;
}