/*
 * Schulmedien – Bildviewer (neutral, über CSS-Variablen anpassbar).
 * Konzept, Projektkoordination und technische Betreuung: Sebastian J. / Schul-IT · Landkreis St. Wendel
 *
 * Variablen (z. B. im Theme auf :root setzen):
 *   --lkwnd-viewer-bg, --lkwnd-viewer-fg, --lkwnd-viewer-accent, --lkwnd-viewer-radius, --lkwnd-viewer-focus
 */
:root {
	--lkwnd-viewer-bg: var(--wp--preset--color--contrast, #111);
	--lkwnd-viewer-fg: var(--wp--preset--color--base, #fff);
	--lkwnd-viewer-accent: var(--lkwnd-viewer-fg);
	--lkwnd-viewer-radius: 6px;
	--lkwnd-viewer-focus: #ffbf47;
}

/* Auslöser im Inhalt.
 * 0.1.1: Der Link ist nur so breit wie das Bild (inline-block), damit die Lupe immer innerhalb des Fotos liegt –
 * auch wenn das Bild schmaler als die Spalte ist. In Galerien (Flex-Elemente) füllt der Link wie bisher die Kachel. */
.lkwnd-viewer-link {
	position: relative;
	display: inline-block;
	max-width: 100%;
	vertical-align: top;
	cursor: zoom-in;
}

.lkwnd-viewer-link > img {
	display: block;
}

.lkwnd-viewer-link::after {
	content: "";
	position: absolute;
	right: 0.5rem;
	bottom: 0.5rem;
	width: 2.25rem;
	height: 2.25rem;
	border-radius: 50%;
	background: rgba(17, 17, 17, 0.72) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23fff'%3E%3Cpath d='M10 3a7 7 0 0 1 5.6 11.2l5.1 5.1-1.4 1.4-5.1-5.1A7 7 0 1 1 10 3zm0 2a5 5 0 1 0 0 10 5 5 0 0 0 0-10zm1 2v2h2v2h-2v2H9v-2H7V9h2V7h2z'/%3E%3C/svg%3E") center / 1.35rem no-repeat;
	pointer-events: none;
	opacity: 0.9;
}

.lkwnd-viewer-link:focus-visible {
	outline: 3px solid var(--lkwnd-viewer-focus);
	outline-offset: 3px;
}

html.lkwnd-viewer-offen {
	overflow: hidden;
}

/* Dialog */
.lkwnd-viewer {
	position: fixed;
	inset: 0;
	box-sizing: border-box;
	width: 100%;
	max-width: 100%;
	height: 100vh;
	height: 100dvh;
	max-height: 100vh;
	max-height: 100dvh;
	margin: 0;
	padding: 0;
	border: 0;
	background: var(--lkwnd-viewer-bg);
	color: var(--lkwnd-viewer-fg);
	font: inherit;
	overflow: hidden;
}

.lkwnd-viewer[open],
.lkwnd-viewer.ist-offen {
	display: grid;
	grid-template-rows: auto minmax(0, 1fr) auto;
	z-index: 100000;
}

.lkwnd-viewer::backdrop {
	background: rgba(0, 0, 0, 0.85);
}

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

/* Gegen Theme-Vorgaben für p, figcaption, a und button absichern (Kontrast im dunklen Dialog). */
.lkwnd-viewer p,
.lkwnd-viewer figcaption,
.lkwnd-viewer a,
.lkwnd-viewer button {
	color: var(--lkwnd-viewer-fg);
	font-size: 1rem;
	letter-spacing: normal;
	text-transform: none;
	box-shadow: none;
}

.lkwnd-viewer [hidden] {
	display: none !important;
}

.lkwnd-viewer__sr {
	position: absolute;
	width: 1px;
	height: 1px;
	overflow: hidden;
	clip-path: inset(50%);
	white-space: nowrap;
}

.lkwnd-viewer svg {
	width: 1.5rem;
	height: 1.5rem;
	fill: currentColor;
	flex: none;
}

.lkwnd-viewer__kopf {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	justify-content: flex-end;
	gap: 0.5rem 1rem;
	padding: 0.5rem 0.75rem;
}

.lkwnd-viewer__zaehler {
	margin: 0 auto 0 0.25rem;
	font-variant-numeric: tabular-nums;
}

.lkwnd-viewer button,
.lkwnd-viewer__original {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: 0.4rem;
	min-width: 44px;
	min-height: 44px;
	padding: 0.4rem 0.8rem;
	border: 2px solid transparent;
	border-radius: var(--lkwnd-viewer-radius);
	background: transparent;
	color: inherit;
	font: inherit;
	line-height: 1.2;
	text-decoration: none;
	cursor: pointer;
}

.lkwnd-viewer__original {
	border-color: currentColor;
}

.lkwnd-viewer button:hover,
.lkwnd-viewer__original:hover {
	border-color: var(--lkwnd-viewer-accent);
}

.lkwnd-viewer button:focus-visible,
.lkwnd-viewer a:focus-visible {
	outline: 3px solid var(--lkwnd-viewer-focus);
	outline-offset: 2px;
}

.lkwnd-viewer button[disabled] {
	opacity: 0.35;
	cursor: default;
}

/* Bühne: Bild vollständig, unverzerrt, innerhalb des sichtbaren Bereichs */
.lkwnd-viewer__buehne {
	position: relative;
	min-height: 0;
	display: grid;
	grid-template-columns: minmax(0, 1fr);
	padding: 0 0.5rem;
}

.lkwnd-viewer__figur {
	min-height: 0;
	height: 100%;
	margin: 0;
	display: grid;
	grid-template-rows: minmax(0, 1fr) auto;
	gap: 0.5rem;
}

.lkwnd-viewer__rahmen {
	min-height: 0;
	height: 100%;
	display: flex;
	align-items: center;
	justify-content: center;
}

.lkwnd-viewer__bild {
	display: block;
	width: auto;
	height: auto;
	max-width: 100%;
	max-height: 100%;
	object-fit: contain;
}

.lkwnd-viewer__figur.ist-ladend .lkwnd-viewer__rahmen {
	background: radial-gradient(circle, rgba(127, 127, 127, 0.25) 0, transparent 60%);
}

.lkwnd-viewer__fehler:empty {
	display: none;
}

.lkwnd-viewer__fehler {
	max-width: 30rem;
	padding: 1rem;
	border: 2px solid currentColor;
	border-radius: var(--lkwnd-viewer-radius);
	text-align: center;
}

.lkwnd-viewer__unterschrift {
	max-width: 60rem;
	margin: 0 auto;
	padding: 0 0.5rem 0.25rem;
	text-align: center;
	line-height: 1.4;
}

.lkwnd-viewer__nav {
	position: absolute;
	top: 50%;
	z-index: 1;
	transform: translateY(-50%);
	width: 48px;
	height: 48px;
	padding: 0 !important;
	border-radius: 50% !important;
	background: rgba(0, 0, 0, 0.55) !important;
	color: #fff !important;
	border: 2px solid rgba(255, 255, 255, 0.85) !important;
}

.lkwnd-viewer__zurueck {
	left: 0.5rem;
}

.lkwnd-viewer__weiter {
	right: 0.5rem;
}

/* Miniaturen */
.lkwnd-viewer__miniaturen {
	display: flex;
	gap: 0.5rem;
	margin: 0;
	padding: 0.5rem 0.75rem 0.75rem;
	list-style: none;
	overflow-x: auto;
	justify-content: safe center;
}

.lkwnd-viewer__miniaturen li {
	flex: none;
	margin: 0;
}

.lkwnd-viewer__miniatur {
	padding: 0 !important;
	border-width: 3px !important;
	overflow: hidden;
}

.lkwnd-viewer__miniatur img {
	display: block;
	width: 64px;
	height: 44px;
	object-fit: cover;
}

.lkwnd-viewer__miniatur[aria-current="true"] {
	border-color: var(--lkwnd-viewer-accent) !important;
}

@media (max-width: 600px) {
	.lkwnd-viewer__kopf {
		padding: 0.25rem 0.5rem;
		gap: 0.25rem 0.5rem;
	}

	/* Schmale Bildschirme: „Original ansehen“ als Symbol-Schalter, Name bleibt für Screenreader erhalten. */
	.lkwnd-viewer__original {
		padding: 0.3rem;
	}

	.lkwnd-viewer__original > span:not(.lkwnd-viewer__sr) {
		position: absolute;
		width: 1px;
		height: 1px;
		overflow: hidden;
		clip-path: inset(50%);
		white-space: nowrap;
	}

	.lkwnd-viewer__buehne {
		padding: 0;
	}

	.lkwnd-viewer__nav {
		top: auto;
		bottom: 0.25rem;
		transform: none;
	}
}

/* Bewegung nur, wenn nicht reduziert gewünscht */
@media (prefers-reduced-motion: no-preference) {
	.lkwnd-viewer[open] {
		animation: lkwnd-viewer-ein 0.18s ease-out;
	}

	.lkwnd-viewer__bild {
		transition: opacity 0.15s ease-out;
	}

	.lkwnd-viewer__figur.ist-ladend .lkwnd-viewer__bild {
		opacity: 0.4;
	}
}

@keyframes lkwnd-viewer-ein {
	from {
		opacity: 0;
	}

	to {
		opacity: 1;
	}
}

@media (forced-colors: active) {
	.lkwnd-viewer button,
	.lkwnd-viewer__original {
		border-color: ButtonText !important;
	}
}