stylesheet.css

body{
	background-color: black;
}

#Container{
	background-color: ;
	width: 1000px;
	height: 550px;
	margin: 20px auto;

}
#calculator{
	background-color: white;
	width: 320px;
	height: 520px;
	margin: 0px auto;
	top: 20px;
	position: relative;
	border-radius: 6px;
	box-shadow: 3px -5px 5px grey;
}
#result{
	height: 40px;
}
#history{
	text-align: right;
	height: 20px;
	margin:0 20px;
	padding-top: 20px;
	font-size: 15px;
	color: #919191;
}
#Output{
	text-align: right;
	height: 60px;
	margin:10px 20px;
	font-size: 30px;
	
}
.operator, .number,.empty{
	width: 50px;
	height: 45px;
	margin: 15px;
	float: left;
	border-radius: 50%;
	border-width: 0;
	font-weight: bold;
	font-size: 15px;
}
.number, .empty{
	background-color: white;
}
.number, .operator{
	cursor: pointer;
}
.operator:active, .number:active{
	font-size: 13px;
}
.number:hover{
	background-color: grey;
}
.operator:focus, .number:focus, .empty:focus{
	outline: 0;
}
button:nth-child(4){
	font-size: 20px;
	background-color: #20b2aa;
}

button:nth-child(8){
	font-size: 20px;
	background-color: #ffa500;
}

button:nth-child(12){
	font-size: 20px;
	background-color: #f08080;
}

button:nth-child(16){
	font-size: 20px;
	background-color: #7d93e0;
}


button:nth-child(20){
	font-size: 20px;
	background-color: #9477af;
}