electron.css

/*
  ____  _            _     _____           _       
 |  _ \| |          | |   / ____|         | |      
 | |_) | | __ _  ___| | _| (___  _   _  __| | ___  
 |  _ <| |/ _` |/ __| |/ /\___ \| | | |/ _` |/ _ \ 
 | |_) | | (_| | (__|   < ____) | |_| | (_| | (_) |
 |____/|_|\__,_|\___|_|\_|_____/ \__,_|\__,_|\___/ Sudan Dev -->
	   
			 # by Omer A. Bila 
			 # FB : https://web.facebook.com/BlackSudo :D
*/
* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;

	font: bold 14px Arial, sans-serif;
}

#calculator {
	width: 325px;
	height: auto;

	padding: 20px;
	background: linear-gradient(#2C9D8E, #35424a);
	box-shadow: 0px 2px #35424a;
}

.top span.clear {
	float: right;
}

.top .screen {
	height: 50px;
	width: 100%;
    margin-bottom: 10px;
	float: left;

	padding: 0 10px;

	background: rgba(0, 0, 0, 0.2);
	border-radius: 50px;
	box-shadow: inset 0px 4px rgba(0, 0, 0, 0.2);

	font-size: 22px;
	line-height: 40px;
	color: white;
	text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.2);
	text-align: right;
	letter-spacing: 1px;
}

.keys, .top {
	overflow: hidden;
}

.keys span, .top span.clear {
	float: left;
	position: relative;
	top: 0;

	cursor: pointer;

	width: 66px;
	height: 40px;

	background: #35424a;
	border-radius: 50px;
	box-shadow: 0px 4px #d3545d(0, 0, 0, 0.2);

	margin: 0 7px 11px 0;
    font-size: 14px;
	color: #fff0f5;
	line-height: 40px;
	text-align: center;

	-webkit-user-select: none;
	user-select: none;

	transition: all 0.2s ease;
}

span.operator {
	margin-right: 0;
}

.keys span.operator {
	background: #35424a;
	margin-right: 0;
	box-shadow: 0px 2px #d3545d;
}

.keys span.sp {
	box-shadow: 0px 2px #2C9D8E;
}

.keys span.eval {
	background: #35424a;
	box-shadow: 0px 2px #2C9D8E;
	color: #888e5f;
}

.top span.clear {
	background: #35424a;
	box-shadow: 0px 2px #d3545d;
	color: white;
}

.keys span:hover {
	background: #2C9D8E;
	box-shadow: 0px 3px #35424a;
	color: white;
}

.keys span.eval:hover {
	background: #35424a;
	box-shadow: 0px 2px #d3545d;
	color: #ffffff;
}

.top span.clear:hover {
	background: #2C9D8E;
	box-shadow: 0px 4px #35424a;
	color: white;
}

.keys span:active {
	box-shadow: 0px 0px #2C9D8E;
	top: 4px;
}

.keys span.eval:active {
	box-shadow: 0px 0px #2C9D8E;
	top: 4px;
}

.top span.clear:active {
	box-shadow: 0px 0px #d3545d;
	top: 4px;
}