/*
 * contactsheet (#28): a gallery's photos and videos as a masonry grid, opened in a lightbox.
 *
 * The grid is a CSS grid of 4px rows; contactsheet.js gives each tile the rows its height needs
 * (grid-row-end: span N) once #sheet has the "masonry" class. Without JavaScript it's a plain grid
 * of tiles at their own aspect ratios. Browsers with native masonry lay it out themselves.
 */

:root{
	--sidebar: 230px;
	--gap: 8px;
	--row: 4px;
	--page: #111;
	--panel: #181818;
	--text: #ddd;
	--muted: #888;
	--accent: #fff;
	color-scheme: dark;
}

*, *::before, *::after{ box-sizing: border-box; }

html{ background: var(--page); }

body{
	margin: 0;
	background: var(--page);
	color: var(--text);
	font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

a{ color: inherit; }

/* Sidebar: site and gallery title, the galleries, feed and download links */

#sidebar{
	position: fixed;
	top: 0;
	left: 0;
	bottom: 0;
	width: var(--sidebar);
	padding: 24px 20px;
	overflow-y: auto;
	background: var(--panel);
}

.sitetitle{
	margin: 0;
	color: var(--muted);
	font-size: 13px;
	letter-spacing: 0.08em;
	text-transform: uppercase;
}

.gallerytitle{
	margin: 4px 0 24px 0;
	color: var(--accent);
	font-size: 22px;
	font-weight: 600;
	line-height: 1.25;
	overflow-wrap: anywhere;
}

#menubutton{ display: none; }

#nav, #nav ul, #links{
	margin: 0;
	padding: 0;
	list-style: none;
}

#nav ul{ padding-left: 12px; }

#nav li{ margin: 2px 0; }

#nav .label{
	display: block;
	margin-top: 12px;
	color: var(--muted);
	font-size: 12px;
	letter-spacing: 0.08em;
	text-transform: uppercase;
}

#nav a, #links a{
	display: block;
	padding: 3px 8px;
	border-left: 2px solid transparent;
	color: var(--text);
	text-decoration: none;
}

#nav a:hover, #nav a:focus-visible, #links a:hover, #links a:focus-visible{
	color: var(--accent);
	border-left-color: var(--muted);
}

#nav li.active > a{
	color: var(--accent);
	border-left-color: var(--accent);
}

#links{ margin-top: 24px; font-size: 13px; }

#links a{ color: var(--muted); }

/* The grid */

#sheet, #comments{ margin-left: var(--sidebar); }

#sheet{
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
	gap: var(--gap);
	padding: var(--gap);
	align-items: start;
}

#sheet.masonry{ grid-auto-rows: var(--row); }

@supports (grid-template-rows: masonry){
	#sheet{ grid-template-rows: masonry; }
}

@supports (display: grid-lanes){
	#sheet{ display: grid-lanes; }
}

.tile{
	position: relative;
	margin: 0;
	overflow: hidden;
	border-radius: 3px;
}

.frame{
	display: block;
	position: relative;
	width: 100%;
	cursor: zoom-in;
}

.frame img{
	display: block;
	width: 100%;
	height: 100%;
	object-fit: cover;
	transition: opacity 0.2s;
}

.frame:hover img{ opacity: 0.9; }

.frame:focus-visible{
	outline: 3px solid var(--accent);
	outline-offset: -3px;
}

/* Videos: a play mark over the poster */
.tile[data-type="video"] .frame::after{
	content: "";
	position: absolute;
	top: 50%;
	left: 50%;
	width: 52px;
	height: 52px;
	margin: -26px 0 0 -26px;
	border-radius: 50%;
	background: rgba(0, 0, 0, 0.55) no-repeat 55% 50% / 20px 20px url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 10 10'%3E%3Cpath d='M1 0l9 5-9 5z' fill='%23fff'/%3E%3C/svg%3E");
	pointer-events: none;
}

/* Captions: over the photo on hover (caption_position: overlay), or below it */

.caption{
	font-size: 14px;
	line-height: 1.45;
}

.caption > :first-child{ margin-top: 0; }
.caption > :last-child{ margin-bottom: 0; }

.caption-overlay .caption{
	position: absolute;
	left: 0;
	right: 0;
	bottom: 0;
	max-height: 70%;
	overflow: hidden;
	padding: 32px 12px 10px 12px;
	background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
	opacity: 0;
	transition: opacity 0.2s;
	pointer-events: none;
}

.caption-overlay:hover .caption, .caption-overlay:focus-within .caption{ opacity: 1; }

.caption-below .caption{ padding: 8px 10px 10px 10px; }

/* Touch screens can't hover: overlay captions wait for the lightbox, and a mark says there's text */
@media (hover: none){
	.caption-overlay .caption{ display: none; }
	.caption-overlay.has-text .frame::before{
		content: "\2026";
		position: absolute;
		left: 8px;
		bottom: 8px;
		padding: 0 7px;
		border-radius: 10px;
		background: rgba(0, 0, 0, 0.55);
		color: #fff;
		font-size: 14px;
		line-height: 20px;
	}
}

/* Photo details (exif_display: icon); hover or focus shows the panel, and photo-info.js pins it
   open on click or tap */
.photo-info{
	position: absolute;
	top: 8px;
	right: 8px;
	z-index: 2;
	text-align: right;
	font-size: 13px;
	line-height: 1.6;
}

.photo-info-button{
	width: 26px;
	height: 26px;
	padding: 0;
	border: 1px solid;
	border-radius: 50%;
	background-color: #222;
	color: #fff;
	font: italic 700 14px/24px Georgia, serif;
	cursor: pointer;
	opacity: 0.7;
	transition: opacity 0.2s;
}

.photo-info-button:hover, .photo-info-button:focus, .photo-info.pinned .photo-info-button{ opacity: 1; }

.photo-info-panel{
	display: none;
	margin: 6px 0 0 0;
	padding: 8px 12px;
	border-radius: 4px;
	background-color: #222;
	color: #fff;
	text-align: left;
	white-space: nowrap;
}

.photo-info-panel span{ display: block; }

.photo-info:focus-within .photo-info-panel, .photo-info.pinned .photo-info-panel{ display: block; }

@media (hover: hover){
	.photo-info:hover .photo-info-panel{ display: block; }
}

.photo-info-line{
	margin: 0.6em 0 0 0;
	font-size: 0.85em;
	opacity: 0.8;
}

/* Lightbox */

#lightbox{
	width: 100%;
	height: 100%;
	max-width: none;
	max-height: none;
	margin: 0;
	padding: 0;
	border: 0;
	overflow: hidden;
	background: #000;
	color: #eee;
}

#lightbox::backdrop{ background: #000; }

#lightbox .stage{
	position: absolute;
	inset: 0;
	display: flex;
	align-items: center;
	justify-content: center;
	touch-action: pan-y pinch-zoom;
}

#lightbox:focus{ outline: none; }

/* As large as fits the screen: --ratio is the photo's width / height, set by contactsheet.js */
#lightbox .shot{
	position: relative;
	width: min(100vw, calc(100vh * var(--ratio, 1.5)));
	width: min(100dvw, calc(100dvh * var(--ratio, 1.5)));
}

#lightbox .shot img, #lightbox .shot video{
	display: block;
	width: 100%;
	height: auto;
}

/* Photo details: in the photo's top right corner as in the other themes; below the close button
   when a photo that fills the screen would put them under it */
#lightbox .shot .photo-info{
	top: 12px;
	right: 12px;
}

#lightbox .shot .photo-info.dodge{ top: 72px; }

#lightbox .details{
	position: absolute;
	left: 0;
	right: 0;
	bottom: 0;
	max-height: 40%;
	overflow-y: auto;
	padding: 40px max(24px, calc(50% - 360px)) 20px max(24px, calc(50% - 360px));
	background: linear-gradient(transparent, rgba(0, 0, 0, 0.85) 40px);
	color: #eee;
}

#lightbox .details:empty{ display: none; }

#lightbox .details > :first-child{ margin-top: 0; }
#lightbox .details > :last-child{ margin-bottom: 0; }

#lightbox button.previous, #lightbox button.next, #lightbox button.close{
	position: absolute;
	width: 48px;
	height: 48px;
	padding: 0;
	border: 0;
	border-radius: 50%;
	background: rgba(0, 0, 0, 0.45);
	color: #fff;
	font-size: 34px;
	line-height: 44px;
	cursor: pointer;
	opacity: 0.75;
	transition: opacity 0.2s;
}

#lightbox button:hover, #lightbox button:focus-visible{ opacity: 1; }

#lightbox button.previous{ left: 12px; top: 50%; margin-top: -24px; }
#lightbox button.next{ right: 12px; top: 50%; margin-top: -24px; }
#lightbox button.close{ right: 12px; top: 12px; z-index: 3; font-size: 30px; }

#lightbox button[hidden]{ display: none; }

/* Comments */

#comments{ padding: 0 var(--gap); }

/* Phones and narrow windows: the sidebar is a bar across the top, with a menu of galleries */
@media only screen and (max-width: 700px) {
	body{ min-width: 0; }
	#sidebar{
		position: static;
		width: auto;
		padding: 14px 16px;
	}
	.masthead{
		display: grid;
		grid-template-columns: 1fr auto;
		align-items: center;
		column-gap: 12px;
	}
	.sitetitle{ grid-column: 1; }
	.gallerytitle{ grid-column: 1; margin: 2px 0 0 0; font-size: 19px; }
	#menubutton{
		display: block;
		grid-column: 2;
		grid-row: 1 / span 2;
		padding: 6px 12px;
		border: 1px solid var(--muted);
		border-radius: 4px;
		background: transparent;
		color: var(--text);
		font: inherit;
		font-size: 13px;
		cursor: pointer;
	}
	#menu{ display: none; padding-top: 12px; }
	#sidebar.open #menu{ display: block; }
	#sheet, #comments{ margin-left: 0; }
	#lightbox button.previous, #lightbox button.next{ display: none; }
}

@media only screen and (max-width: 560px) {
	#sheet{ grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce){
	.frame img, .caption-overlay .caption, #lightbox button{ transition: none; }
}