header div h1{
	font-size: 50px;
	margin-top: 5%;
	font-weight: bold;
	color:orangered;
	text-shadow: 4px 4px 10px rgb(243, 238, 238);
	/* margin-left: 25%; */
}
header{
		-webkit-animation: slide-in-left 2s cubic-bezier(0.250, 0.460, 0.450, 0.940) 1s alternate forwards;
				animation: slide-in-left 2s cubic-bezier(0.250, 0.460, 0.450, 0.940) 1s alternate forwards;
	}
header div p{
		-webkit-animation: slide-in-left 3s cubic-bezier(0.250, 0.460, 0.450, 0.940) 1s alternate forwards;
				animation: slide-in-left 3s cubic-bezier(0.250, 0.460, 0.450, 0.940) 1s alternate forwards;
	color: #1dd899;
	margin-top: 8%;
	margin-left: 32%;
	font-size: 22px;
	font-weight: bold;
}
@-webkit-keyframes slide-in-left {
	0% {
	  -webkit-transform: translateX(-1000px);
			  transform: translateX(-1000px);
	  opacity: 0;
	}
	100% {
	  -webkit-transform: translateX(0);
			  transform: translateX(0);
	  opacity: 1;
	}
  }
  @keyframes slide-in-left {
	0% {
	  -webkit-transform: translateX(-1000px);
			  transform: translateX(-1000px);
	  opacity: 0;
	}
	100% {
	  -webkit-transform: translateX(0);
			  transform: translateX(0);
	  opacity: 1;
	}
  }
  
body{
	display: flex;
	flex-direction: column;
	align-items: center;
}
* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
	font: bold 14px Arial, sans-serif;
}
html {
	height: 100%;
	background: #2e2c2c;
	/* background: radial-gradient(circle, #fff 20%, #ccc); */
	background-size: cover;
}
#calculator {
	width: 325px;
	height: auto;
	
	margin: 100px auto;
	padding: 20px 20px 9px;
	
	background: #333333;
	background: linear-gradient(#888888, #aaaaaa);
	border-radius: 3px;
	box-shadow: 4px 4px #888888, 0px 10px 15px rgba(0, 0, 0, 0.2);
}
.top span.clear {
	float: left;
}
.top .screen {
	height: 40px;
	width: 212px;
	
	float: right;
	
	padding: 0 10px;
	
	background:#bbbbbb;
	border-radius: 3px;
	box-shadow: inset 0px 4px rgba(0, 0, 0, 0.2);
	
	font-size: 17px;
	line-height: 40px;
	color:black;
	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: 36px;
	
	background: white;
	border-radius: 3px;
	box-shadow: 0px 4px #777777;
	
	margin: 0 7px 11px 0;
	
	color: black;
	line-height: 36px;
	text-align: center;
	user-select: none;
	transition: all 0.2s ease;
}
.keys span.operator {
	background: #FFF0F5;
	margin-right: 0;
}

.keys span.eval {
	background: #f1ff92;
	box-shadow: 0px 4px #9da853;
	color:black;
}

.top span.clear {
	background: #da3c4c;
	box-shadow: 0px 4px #df2131;
	color: white;
}
.keys span:hover {
	background: #ee6627;
	box-shadow: 0px 4px #e94504;
	color: white;
}

.keys span.eval:hover {
	background: #abb850;
	box-shadow: 0px 4px #717a33;
	color: #ffffff;
}

.top span.clear:hover {
	background: #da293b;
	box-shadow: 0px 4px #df0f21;
	color: white;
}
.keys span:active {
	box-shadow: 0px 0px #6b54d3;
	top: 4px;
}

.keys span.eval:active {
	box-shadow: 0px 0px #717a33;
	top: 4px;
}

.top span.clear:active {
	top: 4px;
	box-shadow: 0px 0px #d3545d;
}
@media(max-width:720px){
	header div h1{
		font-size: 40px;
	}
	header div p{
		margin-top: 8%;
		margin-left: 30%;
		font-size: 19px;
		font-weight: bold;
	}
}
@media(max-width:580px){
	header div h1{
		font-size: 30px;
	}
	header div p{
		margin-top: 8%;
		margin-left: 28%;
		font-size: 17px;
		font-weight: bold;
	}
}
@media(max-width:434px){
	header div h1{
		font-size: 24px;
	}
	header div p{
		margin-top: 8%;
		margin-left: 28%;
		font-size: 14px;
		font-weight: bold;
	}
}

@media(max-width:346px){
	header div h1{
		font-size: 20px;
	}
	header div p{
		margin-top: 8%;
		margin-left: 25%;
		font-size: 14px;
		font-weight: bold;
	}
}
footer{
	color: white;
}