*, html, body{
  margin: 0;
  paddding: 0;
  box-sizing: border-box;
  font-family: 'Arial', 'Calibri', 'Helvetica', 'Sans-Serif';
}

html, body{
  width: 100%;
  height: 100%;
}

body{
  background-color: #ccc;
}

.container{
  display: flex;
  align-items: center;
  justify-content: space-around;
  width: 100%;
  height: 100%;
}

.btn{
  display: flex;
  align-items: center;
  justify-content: center;
  width: 300px;
  height: 200px;
  background-color: #a6ce38;
  border-radius: 10px;
  box-shadow: 0 0 10px 0 rgba(0,0,0,0.25);
  color: #fff;
  text-decoration: none;
  font-size: 30px;
  font-weight: bold;
  transition: background-color 0.2s ease-in-out;
}

.btn:hover{
  background-color: #BED77A;
  transition: background-color 0.2s ease-in-out;
}

.btn span{
  display: block;
  width: 90%;
  text-align: center;
}