style.css

body {
	display: block;
	margin: 0px;
	padding: 0px;
	font-family: sans-serif;
	background-color: #026fee;
}

.flex-container {
	display: flex;
	display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: -webkit-flex;
	flex-flow: row wrap;
	justify-content: center;
}

.master div {
	text-align: center;
	padding: 10px 10px 0 10px;
	flex: 1 100%;
}

.header span {
	color: white;
	font-weight: bold;
	text-shadow: 0px 2px 5px rgba(0,0,0,1);
	font-size: 5vw;
}


.table table {
	width: 100%;
	height: 100%;
}

input {
	width: 100%;
	height: 10vh;
	border: none;
	text-align: center;
	box-shadow: 0px 2px 5px rgba(0,0,0,0.75);
	transition: all 0.3s ease-in-out;
	font-size: 5vw;
}

input:hover, input:focus {
	background-color: #fff;
}

input[type=number]::-webkit-inner-spin-button, 
input[type=number]::-webkit-outer-spin-button { 
  -webkit-appearance: none; 
  margin: 0; 
}

input[type=number]::placeholder, input[type=number]::-webkit-placeholder {
	font-size: 4vw;
}

.live {background-color: #defabb;}

.dead {background-color: #f5b6da;}

.result div {
	color: white;
	font-weight: bold;
	text-shadow: 0px 2px 5px rgba(0,0,0,1);
	font-size: 4vw;
}

.result span {
	font-size: 5vw;
}

@media all and (min-width: 600px) {
	.master {height: 100vh;}

	input {
		height: 100%;
		font-size: 2vw;
	}

	.header span {
		align-self: flex-end;
		padding-bottom: 20px;
	}

	.table, .result div {
		flex: 1 0 0% !important;
	}

	.table table {
		border-spacing: 10px;
	}

	.result div {font-size: 2.5vw;}
	.result span {font-size: 4vw;}

	input[type=number]::placeholder, input[type=number]::-webkit-placeholder {
		font-size: 2.5vw;
	}
}