body { 
	display: block; 
	align-items: center; 
	justify-content: center; 
	height: 100vh; 
	margin: 0; 
	} 
	
.qrDivBox {
	display: flex;
	flex-wrap: nowrap;
	align-items: center; 
	justify-content: center; 
	height: 300px; 
}

.displayBox {
	display: block; 
	text-align: center;
}
.displayNum {
	text-align: right;
}
.buttonDiv {  
	display: flex;
	flex-wrap: nowrap;
	align-items: center; 
	justify-content: center; 
}
.numpad { 
	display: block;
	text-align: center; 
	align-items: center; 
	justify-content: center; 
}
.sideButtons {
	display: inline-grid;
	flex-wrap: nowrap;
	align-items: center; 
	justify-content: center; 
}
button { 
	width: 67px; 
	height: 67px; 
	font-size: 18px; 
	margin: 5px; 
}
.buttonGreen {
	height: 135px; 
	background-color: #6AFF93;
	color: white;
	} /* Green */
	
.buttonRed {
	height: 135px; 
	background-color: #FF7272;
	color: white;
} /* red */