html {
	height: 100%;
}

body {
	margin: 0;
	font-family: sans-serif;
	height: 100%;
	background-repeat: no-repeat;
	background-attachment: fixed;
	background: rgba(135, 193, 255, 1);
	background: linear-gradient(to top right, rgba(135, 193, 255, 0.4), rgba(135, 193, 255, 1), rgba(135, 193, 255, 0.4));
}

.calculator {
	height: 100vh;
	height: calc(var(--vh, 1vh) * 100);
	display: grid;
	grid-template-columns: repeat(4, 100px);
	grid-template-rows: 120px repeat(5, 100px);
	justify-content: center;
	align-content: center;
}

button {
	background-color: rgba(220, 220, 220, 0.3);
	color: rgba(255, 255, 255, 1);
	font-size: 2em;
	text-align: center;
	border: 1px solid rgba(255, 255, 255, .25);
	font-weight: 100;
	padding: 0;
	margin: 0;
}

button[data-operator] {
	transition-duration: 0.3s;
}

.operatorselected {
	background-color: rgba(255, 139, 0, 0.3) !important;
}

button:hover {
	background-color: rgba(235, 235, 235, 0.45);
}

.bottomleftcorner {
	border-bottom-left-radius: 0.375em;
}

.bottomrightcorner {
	border-bottom-right-radius: 0.375em;
}

.displaybox {
	grid-column: 1 / -1;
	border-radius: 0.75em 0.75em 0 0;
	background-color: rgba(0, 0, 0, 0.35);
	display: flex;
	align-items: center;
	justify-content: flex-end;
}

.displaynumber {
	margin-top: 20px;
	padding-right: 10px;
	font-size: 3em;
	font-weight: 100;
	color: white;
}

@media (max-width: 450px), (max-height: 620px) {
	.calculator {
		grid-template-columns: repeat(4, 80px);
		grid-template-rows: 100px repeat(5, 80px);
	}

	button {
		font-size: 1.8em;
	}
}

@media (max-width: 320px), (max-height: 500px) {
	.calculator {
		grid-template-columns: repeat(4, 60px);
		grid-template-rows: 80px repeat(5, 60px);
	}

	button {
		font-size: 1.6em;
	}
}