body,
html {
	height: 100%;
	margin: 0;
}

:root {
	--background-color: black;
	--text-color: white;
	--text-shadow: 0px 2px 2px blue;
	--label-background-color: #000000;
	--label-text-color: #ffffff;
	--label-border-color: #33333375;
	--alt-text-fallback-color: #a5a5a5;

	--dialog-background-color: #13152b;
	--dialog-border-color: #202449;
	--dialog-text-color: #ffffff;
	--dialog-backdrop-gradient: radial-gradient(circle, rgba(32, 36, 73, 0.64) 0%, rgba(32, 36, 73, 0.45) 21%, rgba(32, 36, 73, 0.18) 46%);
}

dialog {
	background-color: var(--dialog-background-color);
	border-color: var(--dialog-border-color);
	color: var(--dialog-text-color);
	font-family: Arial, Helvetica, sans-serif;
}

dialog::backdrop {
	background: var(--dialog-backdrop-gradient);
}

body {
	background-color: var(--background-color);
}

/* https://stackoverflow.com/a/18490463 */
.fullscreen-image {
	max-width: 100%;
	max-height: 100%;
	bottom: 0;
	left: 0;
	margin: auto;
	overflow: auto;
	position: fixed;
	right: 0;
	top: 0;
	-o-object-fit: contain;
	object-fit: contain;
}

.current-labels,
.position-indicator {
	z-index: 2;
}

.position-indicator {
	position: fixed;
	text-align: center;
	width: 100%;
	bottom: 0%;
	pointer-events: none;
}

.font {
	font-family: Arial, Helvetica, sans-serif;
	color: white;
	text-shadow: var(--text-shadow);
}

.current-labels {
	position: fixed;
}

.label {
	height: 16px;
}

input[type="checkbox"] {
	display: none;
}

input[type="checkbox"] + label {
	text-shadow: initial;
	display: inline-block;
	margin-top: 4px;
	margin-bottom: 0px;
	margin-left: 1px;
	margin-right: 1px;
	padding: 2px 4px;
	color: #333;
	background-color: #e0e0e0;
	opacity: 0.4;
	text-align: center;
	vertical-align: middle;
	cursor: pointer;
	font-size: 12px;
	border-radius: 4px;
	border-bottom: outset;
	border-color: rgba(51, 51, 51, 0.459);
}

input[type="checkbox"]:checked + label {
	/* background-color: #e0e0e0; */
	opacity: 1;
}

.hidden {
	display: none;
}

.grid-item {
	min-height: fit-content;
}

img[alt],
video[alt] {
	color: var(--alt-text-fallback-color);
}