.btn {
	width: 90px;
	height: 50px;
	background-color: #f4f4f4;
	border: 2px solid #eaeaea;
	font-size: 27px;
	color: #666666;
	text-transform: uppercase;
	border-radius: 6px;
	padding: 0;
	cursor: pointer;
}	
.btn_hover_red:hover{
    background-color: #d83e3e;
    color: #f2f2f2;  
}

.btn_hover_blue:hover{
    background-color: #1f8bf8;
    color: #f2f2f2;  
}
.btn_hover_default:hover{
    background-color: #C0C0C0;
    color: #f2f2f2;  
}

.btn_tall {
	width: 90px;
	height: 100px;
	background-color: #f4f4f4;
	border: 2px solid #eaeaea;
	font-size: 27px;
	color: #666666;
	text-transform: uppercase;
	border-radius: 6px;
	padding: 0;
	cursor: pointer;
}


.btn_wide {
	width: 180px;
	height: 50px;
	background-color: #f4f4f4;
	border: 2px solid #eaeaea;
	font-size: 27px;
	color: #666666;
	text-transform: uppercase;
	border-radius: 6px;
	padding: 0;
	cursor: pointer;
}	
.calc_display-input {
    width: 380px;
	height: 50px;
	background-color: #ffffff;
	border: 2px solid #eaeaea;
	font-size: 27px;
	color: #666666;
	text-transform: uppercase;
	border-radius: 6px;
	padding: 0;
	cursor: pointer;	
}