main.css

* {
  padding: 0;
  margin: 0;
}

html, body {
  width: 100%;
  height: 100%;
  background-color: #d7d7d8;
}

h1 {
  margin-bottom: 20px;
  font-family: 'Pacifico', cursive;
}

.container {
  margin-top: 20px;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;

}

.buttons {
  display: flex;
  flex-wrap: wrap;
}

.btn:disabled {
  opacity: 0.5;
}

.btn {
	position: relative;
	padding: 10px 40px;
  margin: 0px 10px 10px 0px;
  float: left;
	border-radius: 10px;
	font-family: 'Pacifico', cursive;
	font-size: 25px;
	color: #FFF;
	text-decoration: none;
}

.btn:active {
	transform: translate(0px,5px);
  -webkit-transform: translate(0px,5px);
	border-bottom: 1px solid;
}

.green {
	background-color: #82BF56;
	border-bottom: 5px solid #669644;
	text-shadow: 0px -2px #669644;
}

.red {
	background-color: #E74C3C;
	border-bottom: 5px solid #BD3E31;
	text-shadow: 0px -2px #BD3E31;
}