body {
	text-align: center;
	font-family: Arial, Helvetica, sans-serif;
	margin: 0;
	background-color: var(--default-background-color);
	color: var(--default-font-color);
}

canvas {
	display: block;
	touch-action: none; /* disables reloading and zooming */
	width: 100%;
	height: 100%;
}

#fps {
	position: absolute;
	right: 0;
	top: 0;

	font-size: 1.4em;
	margin: 0.3em 0.5em;
	color: white;
	text-shadow: 0 0 0.3em #000, 0 0 0.7em #000;
	user-select: none;
}

#error {
	margin: 2em 20%;
}

#error:empty {
	display: none; /* if no text is set, hide */
}

label {
	margin-left: 3em;
}

/* default color scheme */
:root {
	--default-font-color: #303030;
	--default-background-color: #e9e9e9;
}

/* dark color scheme (depending on browser settings) */
@media (prefers-color-scheme: dark) {
	:root {
		--default-font-color: #cac5be;
		--default-background-color: #181a1b;
	}
}