#main-app {
	display: flex;
	flex-direction: column;
	justify-content: center;
	align-items: center;
	position: fixed;
	left: 50%;
	top: 50%;
	transform: translate(-50%, -50%);
	
	font-family: sans-serif;
	gap: 20px;
	padding: 20px;
	background: gray;
	border-radius: 10px;
}

* {
	margin: 0;
}

.train-bg {
	--trainprog: calc(var(--trains) / 100000 * 100%);
	background: linear-gradient(to right, #000, #000 var(--trainprog), #fff var(--trainprog), #fff);
	padding: 5px 10px;
	width: 200px;
	position: relative;
	display: inline-block;
	border-radius: 5px;
	text-align: right;
}

button[increment] {
	cursor: pointer;
}