:root {
	--body-margin: 8px; /* Default value in browsers */
	--max-font-size-unitless: 18;

	/* Measurements of the width of all columns
	except name and description on smaller screens */
	--collapsed-static-column-width-px: 400px;
	--collapsed-static-column-width: calc(
		( 400 / var(--max-font-size-unitless) ) * 1rem
	);

	/* Measurements of the width of all columns
	except name and description on wider screens */
	--expanded-static-column-width-px: 800px;
	--expanded-static-column-width: calc(
		( 800 / var(--max-font-size-unitless) ) * 1rem
	);

	/* Space left for the name and description columns,
	in the collapsed and expanded cases. */
	--collapsed-dynamic-columns-width:
		calc(
			100vw
			- var(--collapsed-static-column-width)
			- 2 * var(--body-margin);
		);

	--expanded-dynamic-columns-width:
		calc(
			100vw
			- var(--expanded-static-column-width)
		);

	/* Default for wide screens. */
	--dynamic-columns-width: var(--expanded-dynamic-columns-width);
}

html {
	font-size: clamp(10px, 2vw, var(--max-font-size-unitless) * 1px);
}

body {
	margin: 0;
}

#toggle-theme-switch {
	display: none;
}

#theming-root {
	width: 100%;
	height: 100%;
	margin: 0;
	background-color: var(--secondary-color);
	color: var(--primary-color);
}

#toggle-theme-switch:not(:checked) ~ #theming-root {
	--primary-color:					hsl(0, 0%, 100%);
	--secondary-color:					hsl(0, 0%, 0%);
	--secondary-color-heading:			hsl(0, 0%, 17%);
	--secondary-color-shaded:			hsl(0, 0%, 9%);
	--anchor-color:						hsl(210, 100%, 60%);
	--color-http:						hsl(0, 0%, 17%);
	--color-https:						hsl(195, 53%, 21%);
}


#toggle-theme-switch:checked ~ #theming-root {
	--primary-color:					hsl(0, 0%, 0%);
	--secondary-color:					hsl(0, 0%, 100%);
	--secondary-color-heading:			hsl(0, 0%, 83%);
	--secondary-color-shaded:			hsl(0, 0%, 91%);
	--anchor-color:						hsl(210, 100%, 40%);
	--color-http:						hsl(0, 0%, 83%);
	--color-https:						hsl(195, 53%, 79%)
}

a, .anchorstyle {
	color: var(--anchor-color);
	text-decoration: underline;
	cursor: pointer;
}

*, *::after, *::before {
	transition: color 3s, background-color 2s;
}

html.js .noscript, .hidden {
	display: none;
}

html:not(.js) .js-only {
	display: none;
}

header {
	display: flex;
	direction: row;
	/* Push items as far apart as possible */
	justify-content: space-between;
	padding-top: var(--body-margin);
	padding-inline: var(--body-margin);
}

#header-start, #header-end {
	display: flex;
	gap: 0.5em;
}

#headline {
	text-align: center;
	flex-grow: 1;
}

/* --- Table --- */

#tbl_communities {
	margin: 0 auto;

	--cell-padding-h: 0.5em;
	--cell-padding-v: 0.5em;
	--cell-padding: var(--cell-padding-h) var(--cell-padding-v);
	--cell-padding-small:
		calc( var(--cell-padding-h) / 2 ) calc( var(--cell-padding-v) / 2 );
}

/* Cells in general */
#tbl_communities th {
	white-space: nowrap;
}

#tbl_communities :is(th, td) {
	padding: var(--cell-padding-v) var(--cell-padding-h);
}

#tbl_communities th.sortable {
	position: relative;
	padding-right: calc( 1.35em + var(--cell-padding-h) );
}

#tbl_communities th.sortable::after {
	position: absolute;
	right: calc( var(--cell-padding-h) );
	top: 50%;
	transform: translateY(-50%);
	/* content: "\25C7"; */ /* White diamond */
	/* content: "\2195"; */ /* Up-down arrow */
	/* content: "\25A1"; */ /* White square */
	/* content: "\25B8"; */ /* Small right pointing triangle */
	content: "\2B25"; /* Black medium diamond */
	color: grey;
	font-size: 1.3em;
}

#tbl_communities[data-sort-asc=true] th[data-sort=true]::after {
	content: "\25B2"; /* Black up pointing triangle */
	color: initial;
	font-size: 1em;
}

#tbl_communities[data-sort-asc=false] th[data-sort=true]::after {
	content: "\25BC"; /* Black up pointing triangle */
	color: initial;
	font-size: 1em;
}

#toggle-show-room-ids:not(:checked)
~ #tbl_communities :is(#th_identifier, .td_identifier) {
	display: none;
}

#tbl_communities th {
	background-color: var(--secondary-color-heading);
}

#tbl_communities tr {
	background-color: var(--row-color);
}

#tbl_communities tr:nth-child(even) {
	background-color: var(--secondary-color);
	--row-color: var(--secondary-color);
}

#tbl_communities tr:nth-child(odd)  {
	background-color: var(--secondary-color-shaded);
	--row-color: var(--secondary-color-shaded);
}

/* Particular columns */

.td_identifier {
	font-family: monospace;
}

#th_name, .td_name {
	width: calc(
		0.375 * (
			var(--dynamic-columns-width)
		)
	);
	max-width: calc(
		0.375 * (
			var(--dynamic-columns-width)
		)
	);
	overflow: hidden;
	text-overflow: ellipsis;
}

.td_language {
	text-align: center;
	font-size: 1.5em;
}
.td_language:empty::after {
	content: "\2753";
}

.td_description  {
	position: relative;
	overflow: hidden;
	text-overflow: ellipsis;
	/* Prevents middle alignment with table-cell. */
	display: -webkit-box;
	-webkit-box-orient: vertical;
	-webkit-line-clamp: 3;
}

#th_description, .td_description {
	width: calc(
		0.625 * (
			var(--dynamic-columns-width)
		)
	);

	max-width: calc(
		0.625 * (
			var(--dynamic-columns-width)
		)
	);
}

.td_description::after {
	/* Cover overflowing description lines with internal border. */
	position: absolute;
	bottom: 0;
	left: 0;
	width: 100%;
	height: var(--cell-padding-h);
	content: "";
	background-color: var(--row-color);
}

.td_users {
	text-align: center;
	/* font-weight: bold; */
}

.td_preview {
	text-align: center;
}

.protocol-indicator {
	display: inline-block;
	font-family: monospace;
	border-radius: 4px;
	padding: .25em .05em;
	width: 6ch;
	text-align: center;
	text-shadow: 0 0 0.5em #0003;
}

a[href^="http:"] .protocol-indicator {
	background-color: var(--color-http);
}

a[href^="https:"] .protocol-indicator {
	background-color: var(--color-https);
}

a[href^="http:"] .protocol-indicator::after {
	content: "HTTP";
}

a[href^="https:"] .protocol-indicator::after {
	content: "HTTPS";
}

.td_qr_code {
	padding: var(--cell-padding-small) !important;
}

.td_server_icon {
	text-align: center;
	padding: var(--cell-padding-small) !important;
	font-size: 1.1em;
}

.td_server_icon-circle {
	display: flex;
	align-items: center;
	justify-content: center;
	width: 2em;
	height: 2em;
	border-radius: 100%;
	font-family: sans-serif;
	margin: 0 auto;
	color: white;
	text-shadow: 0 0 0.25em #000a;
	box-shadow: 0 0 0.05em #777;
}

.td_server_icon-circle span {
	position: relative;
	top: 0.05em;
}

.td_join_url     {
	font-family: monospace;
	white-space: nowrap;
	font-size: .8em;
}

.join_url {
	overflow: hidden;
	text-overflow: ellipsis;
	max-width: 20vw;
	/* Apply margin against copy button or link. */
	/* URL now guaranteed to have interactive element to right when present. */
	margin-right: 1em;
}


@media (max-width: 1050px) {
	/* Only current width breakpoint; */
	/* Would follow w4 and precede w6. */
	.show-from-w5 {
		display: none;
	}

	#th_preview, .td_preview {
		display: none;
	}

	:root {
		--dynamic-columns-width: var(--collapsed-dynamic-columns-width);
	}
}

@media (max-width: 500px) {
	:root {
		/* ! For when descriptions don't wrap and 100vw doesn't work. */
		--dynamic-columns-width: 15rem;
	}
}

.join_url_container {
	display: flex;
	flex-direction: row;
	align-items: center;
	justify-content: space-around;
}

.copy_button {
	font-size: 1.1em;
	background-color: var(--secondary-color);
	color: var(--primary-color);
	padding: var(--cell-padding);
	border-radius: 10%;
}

/* --- Footer --- */

footer {
	display: flex;
	flex-direction: column;
	align-items: center;
	max-width: 100%;
	text-align: center;

	padding-bottom: var(--body-margin);
	padding-inline: var(--body-margin);
}

footer p {
	width: 75%;
	margin: .5em;
	text-align: center;
}

footer nav a {
	display: inline-block;
	margin: .25em;
	white-space: nowrap;
}

label[for=toggle-show-room-ids]::after {
	content: " (Off)"
}

#toggle-show-room-ids:checked
~ footer label[for=toggle-show-room-ids]::after {
	content: " (On)"
}

/* --- QR code modals --- */
.qr-code {
	display: block;
	margin-left: auto;
	margin-right: auto;
	width: 50%;
}

.qr-code-icon {
	cursor: pointer;
}

.qr-code-modal {
	display: none;   /* Hidden by default */
	position: fixed; /* Stay in place */
	z-index: 1;      /* Sit on top */
	left: 0;
	top: 0;
	width: 100%;     /* Full width */
	height: 100%;    /* Full height */
	padding-top: 100px; /* Location of the box */
	background-color: rgb(0,0,0); /* Fallback color */
	background-color: rgba(0,0,0,0.4); /* Black w/ opacity */
	/*overflow: auto;*/ /* Enable scroll if needed */

}
.qr-code-modal-content {
	background-color: #ffffff;
	border: 1px solid #000000;
	width: 80%;
	margin: auto;
	padding: 20px;
}
.qr-code-modal-close {
	float: right;
	font-size: 35px;
	font-weight: bold;
	color: #aaaaaa;
}
.qr-code-modal-close:hover,
.qr-code-modal-close:focus {
	cursor: pointer;
	text-decoration: none;
	color: #000000;
}

/* <Snackbar> */
/* The snackbar - position it at the bottom and in the middle of the screen */
#copy-snackbar {
	visibility: hidden; /* Hidden by default. Visible on click */
	background-color: #333; /* Black background color */
	color: #fff; /* White text color */
	text-align: center; /* Centered text */
	border-radius: 2px; /* Rounded corners */
	padding: 16px;
	position: fixed; /* Move along as viewport scrolls */
	z-index: 1; /* Add a z-index if needed */
	left: 50%; /* Offset the snackbar by half the viewport width */
	transform: translateX(-50%); /* Push the snackbar back by half its width */
	bottom: 30px; /* 30px from the bottom */
}

/* Show the snackbar when clicking on a button (class added with JavaScript) */
#copy-snackbar.show {
	visibility: visible; /* Show the snackbar */
	/* Add animation: Take 0.5 seconds to fade in and out the snackbar.
	However, delay the fade out process for 2.5 seconds */
	-webkit-animation: fadein 0.5s, fadeout 0.5s 2.5s;
	animation: fadein 0.5s, fadeout 0.5s 2.5s;
}

/* Animations to fade the snackbar in and out */
@-webkit-keyframes fadein {
	from {bottom: 0; opacity: 0;}
	to {bottom: 30px; opacity: 1;}
}

@keyframes fadein {
	from {bottom: 0; opacity: 0;}
	to {bottom: 30px; opacity: 1;}
}

@-webkit-keyframes fadeout {
	from {bottom: 30px; opacity: 1;}
	to {bottom: 0; opacity: 0;}
}

@keyframes fadeout {
	from {bottom: 30px; opacity: 1;}
	to {bottom: 0; opacity: 0;}
}