.row{
	margin: 0;
}

#calculator-header{
	text-align: center;
	font-size: 26px;
	font-weight: bold;
	margin: 10px 0 0 0;
}

#calculator-holder .card-header{
	padding: 4px 10px 4px 10px;
}

.card-body{
	background-color: #ffffff;
}

#number-display{
	text-align: right;
	font-size: 40px;
	font-weight: bold;
}

.back-to-home{
	text-align: center;
	width: 100%;
	margin-bottom:10px;
	font-size:20px;
}

.back-to-home a{
	color: #000000;
}

.back-arrow{
	font-size: 40px;
	padding-bottom:10px;
}

.button-row{
	width: 100%;
	text-align: center;
	margin-bottom: 20px;
}

.button-row button{
	width: 58px;
	font-size: 30px;
	margin: 0 6px 0 6px;
	padding: 8px 0 8px 0;
}

.button-row button:first-child{
	margin: 0 6px 0 0;
}

.button-row button:last-child{
	margin: 0 0 0 6px;
}

.button-row button.no-margin{
	margin: 0;
}

.calc-hidden{
	visibility: hidden;
}