*,
*::before,
*::after {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
	font-family: 'Roboto', sans-serif;
}

body {
	height: 100vh;
	width: 100%;
	overflow: hidden;
	display: flex;
	justify-content: center;
	align-items: center;
	background: linear-gradient(to top left, rgb(0, 24, 54), rgb(37, 121, 136));
}

.container {
	z-index: 10;
	width: 400px;
	padding: 20px;
	border-radius: 12px;
	background: rgba(255, 255, 255, 0.05);
	backdrop-filter: blur(15px);
	-webkit-backdrop-filter: blur(15px);
	box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
	border-top: 1px solid rgba(255, 255, 255, 0.5);
	border-left: 1px solid rgba(255, 255, 255, 0.5);
}

.container .display,
.container button {
	border: 2px solid rgba(57, 248, 255, 0.103);
	background: transparent;
	color: rgba(57, 248, 255, 0.705);
	border-radius: 12px;
}

.container .display {
	width: 100%;
	height: 100px;
	margin: 0 5px 10px 0;
	padding: 10px;
	display: flex;
	flex-direction: column;
	justify-content: space-around;
	outline: none;
	border: 2px solid rgba(57, 248, 255, 0.2);
	box-shadow: 0 0px 10px rgba(57, 248, 255, 0.2);
	font: inherit;
	text-align: right;
	pointer-events: none;
}

.display .prevOperand {
	width: 100%;
	color: rgba(57, 248, 255, 0.5);
	font-size: 1.5em;
}

.display .currOperand {
	width: 100%;
	font-size: 2em;
}

.container button {
	height: 90px;
	width: 90px;
	margin: 5px;
	font-size: 1.5em;
	cursor: pointer;
}

.container button:hover {
	border: 2px solid rgba(57, 248, 255, 0.2);
}

.container button:active {
	font-weight: bold;
	font-size: 2em;
	border: 3px solid rgba(57, 248, 255, 0.2);
	box-shadow: 0 0px 30px rgba(57, 248, 255, 0.2);
}

.row {
	display: flex;
	justify-content: center;
	align-items: center;
}