/**
 * KW Lobby — Shared Lightbox
 * Wiederverwendbare Fullscreen-Lightbox via <dialog>.
 *
 * Nutzer: RoomGallery, RoomArtistProfile (und zukünftige Widgets).
 * API: data-kwl-lightbox auf <dialog>, data-kwl-lightbox-urls JSON.
 *
 * Features:
 *   - <dialog> mit showModal() / close() (nativer Focus-Trap)
 *   - inert auf Restseite (body-Level, 2026 Baseline)
 *   - View Transitions für Bildwechsel (Progressive Enhancement)
 *   - Glassmorphism-Buttons (Close/Prev/Next)
 *   - srcset/sizes Support
 *   - Caption (mit Background-Pill) + Counter
 *   - Touch-Swipe
 *   - Keyboard (ArrowLeft/Right, Escape nativ)
 *   - scrollbar-gutter: stable (kein Layout-Shift)
 *   - @starting-style Entry-Animation (Progressive Enhancement)
 *   - prefers-reduced-motion konform
 *   - BFSG: 44px Touch-Targets, focus-visible, aria-live
 */

/* ==========================================================================
   1. Custom Properties
   ========================================================================== */
.kwl-lightbox {
	--kwl-lb-backdrop: rgb(0 0 0 / 0.9);
	--kwl-lb-easing: var(--kwl-ease-default);
	--kwl-lb-btn-bg: rgb(0 0 0 / 0.45);
	--kwl-lb-btn-bg-hover: rgb(0 0 0 / 0.65);
	--kwl-lb-btn-border: rgb(255 255 255 / 0.15);
	--kwl-lb-btn-color: #ffffff;
	--kwl-lb-counter-bg: rgb(0 0 0 / 0.55);
	--kwl-lb-caption-bg: rgb(0 0 0 / 0.6);
	--kwl-lb-accent: var(--kwl-accent, #BD9B5C);
	--kwl-lb-focus: var(--kwl-focus, #c9a84c);
	--kwl-lb-z: 100000;
}

/* ==========================================================================
   2. Dialog Base
   ========================================================================== */
.kwl-lightbox {
	position: fixed;
	inset: 0;
	width: 100dvw;
	height: 100dvh;
	max-width: none;
	max-height: none;
	padding: 0;
	border: 0;
	background: transparent;
	z-index: var(--kwl-lb-z);
	color-scheme: dark;
}

.kwl-lightbox::backdrop {
	background: var(--kwl-lb-backdrop);
}

.kwl-lightbox[open] {
	display: flex;
	align-items: center;
	justify-content: center;
}

/* ==========================================================================
   3. Entry Animation
   ========================================================================== */

/* Modern: @starting-style (Progressive Enhancement, Chrome 117+/Firefox 129+) */
@supports (selector(:popover-open)) {
	@starting-style {
		.kwl-lightbox[open] {
			opacity: 0;
		}

		.kwl-lightbox[open]::backdrop {
			opacity: 0;
		}
	}

	.kwl-lightbox[open] {
		opacity: 1;
		transition: opacity 250ms var(--kwl-lb-easing);
	}

	.kwl-lightbox[open]::backdrop {
		opacity: 1;
		transition: opacity 250ms var(--kwl-lb-easing);
	}
}

/* Fallback: Keyframe-Animation für ältere Browser */
@keyframes kwl-lightbox-in {
	from {
		opacity: 0;
		transform: scale(0.96);
	}
	to {
		opacity: 1;
		transform: scale(1);
	}
}

.kwl-lightbox[open] .kwl-lightbox__inner {
	animation: kwl-lightbox-in 250ms var(--kwl-lb-easing);
}

/* ==========================================================================
   4. Image Container
   ========================================================================== */
.kwl-lightbox__inner {
	position: relative;
	z-index: 1;
	display: flex;
	align-items: center;
	justify-content: center;
	max-width: 90vw;
	max-height: 85vh;
}

/* Mobile-First: volle Breite, ab 768px eingeschränkt */
.kwl-lightbox__img {
	display: block;
	max-width: 100vw;
	max-height: 85vh;
	object-fit: contain;
	-webkit-touch-callout: none;
}

@media (min-width: 768px) {
	.kwl-lightbox__img {
		max-width: 85vw;
		max-height: 80vh;
	}
}

/* View Transition Klasse (JS setzt diese) */
.kwl-lightbox__img.kwl-lb-transitioning {
	view-transition-name: kwl-lightbox-image;
}

/* ==========================================================================
   5. Navigation Buttons (Glassmorphism)
   ========================================================================== */
/* Spezifität (0,2,0): schützt gegen Elementor V4 Button-Resets */
.kwl-lightbox .kwl-lightbox__close,
.kwl-lightbox .kwl-lightbox__prev,
.kwl-lightbox .kwl-lightbox__next {
	position: fixed;
	z-index: 20;
	display: flex;
	align-items: center;
	justify-content: center;
	width: 44px;
	height: 44px;
	padding: 0;
	border: 1px solid var(--kwl-lb-btn-border);
	border-radius: 50%;
	background: var(--kwl-lb-btn-bg);
	color: var(--kwl-lb-btn-color);
	cursor: pointer;
	backdrop-filter: blur(8px);
	-webkit-backdrop-filter: blur(8px);
	transition: background 200ms var(--kwl-lb-easing),
	            border-color 200ms var(--kwl-lb-easing),
	            box-shadow 200ms var(--kwl-lb-easing),
	            color 200ms var(--kwl-lb-easing);
	appearance: none;
	-webkit-appearance: none;
}

/* SVG-Icons innerhalb der Buttons: currentColor erzwingen */
.kwl-lightbox__close svg,
.kwl-lightbox__prev svg,
.kwl-lightbox__next svg {
	fill: currentColor;
	stroke: currentColor;
	color: inherit;
}

/* Close-Icon nutzt stroke statt fill */
.kwl-lightbox__close svg[fill="none"] {
	fill: none;
}

.kwl-lightbox__close {
	top: 20px;
	right: 20px;
}

.kwl-lightbox__prev {
	top: 50%;
	left: 16px;
	transform: translateY(-50%);
}

.kwl-lightbox__next {
	top: 50%;
	right: 16px;
	transform: translateY(-50%);
}

@media (hover: hover) {
	/* Spezifität (0,3,0): schlägt Elementor V4 Button-Hover-Override (pink) */
	.kwl-lightbox .kwl-lightbox__close:hover,
	.kwl-lightbox .kwl-lightbox__prev:hover,
	.kwl-lightbox .kwl-lightbox__next:hover {
		background: var(--kwl-lb-btn-bg-hover);
		color: var(--kwl-lb-btn-color);
		border-color: color-mix(in srgb, var(--kwl-lb-accent) 60%, transparent);
		box-shadow: 0 0 12px color-mix(in srgb, var(--kwl-lb-accent) 20%, transparent);
	}
}

/* ==========================================================================
   6. Caption + Counter
   ========================================================================== */
.kwl-lightbox__caption {
	position: fixed;
	z-index: 15;
	bottom: 48px;
	left: 50%;
	transform: translateX(-50%);
	max-width: 70vw;
	color: var(--kwl-lb-btn-color);
	font-size: var(--kwl-fsize-small, 0.875rem);
	font-family: var(--kwl-font-body);
	text-align: center;
	pointer-events: none;
	margin: 0;
	/* Background-Pill für Lesbarkeit auf hellen Bildern */
	background: var(--kwl-lb-caption-bg);
	padding: 6px 14px;
	border-radius: var(--kwl-radius-sm, 4px);
	line-height: var(--kwl-lh-body, 1.5);
}

.kwl-lightbox__caption:empty {
	display: none;
}

.kwl-lightbox__counter {
	position: fixed;
	z-index: 15;
	bottom: 16px;
	left: 50%;
	transform: translateX(-50%);
	background: var(--kwl-lb-counter-bg);
	color: var(--kwl-lb-btn-color);
	font-size: var(--kwl-fsize-caption, 0.8125rem);
	font-family: var(--kwl-font-body);
	padding: 4px 10px;
	border-radius: var(--kwl-radius-sm, 4px);
	pointer-events: none;
	font-variant-numeric: tabular-nums;
}

/* ==========================================================================
   7. Focus Visible (BFSG)
   ========================================================================== */
.kwl-lightbox .kwl-lightbox__close:focus-visible,
.kwl-lightbox .kwl-lightbox__prev:focus-visible,
.kwl-lightbox .kwl-lightbox__next:focus-visible {
	outline: 3px solid var(--kwl-lb-focus);
	outline-offset: 2px;
	color: var(--kwl-lb-btn-color);
}

/* ==========================================================================
   8. Body Scroll Lock
   ========================================================================== */
body:has(.kwl-lightbox[open]) {
	overflow: hidden;
	scrollbar-gutter: stable;
}

/* ==========================================================================
   9. Dark Mode
   ========================================================================== */
@media (prefers-color-scheme: dark) {
	.kwl-lightbox {
		--kwl-lb-backdrop: rgb(0 0 0 / 0.95);
		--kwl-lb-btn-bg: rgb(255 255 255 / 0.15);
		--kwl-lb-btn-bg-hover: rgb(255 255 255 / 0.28);
		--kwl-lb-btn-border: rgb(255 255 255 / 0.1);
		--kwl-lb-caption-bg: rgb(0 0 0 / 0.75);
		--kwl-lb-focus: var(--kwl-focus, #c9a84c);
	}
}

/* ==========================================================================
   10. Reduced Motion
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
	.kwl-lightbox[open] .kwl-lightbox__inner {
		animation: none;
	}

	.kwl-lightbox__close,
	.kwl-lightbox__prev,
	.kwl-lightbox__next,
	.kwl-lightbox__thumb {
		transition: none;
	}

	@supports (selector(:popover-open)) {
		.kwl-lightbox[open],
		.kwl-lightbox[open]::backdrop {
			transition: none;
		}
	}
}

/* ==========================================================================
   11. SR-Only Live-Region (Counter für Screen-Reader)
   ========================================================================== */
.kwl-lightbox__sr {
	position: absolute;
	width: 1px;
	height: 1px;
	margin: -1px;
	padding: 0;
	border: 0;
	clip: rect(0 0 0 0);
	clip-path: inset(50%);
	overflow: hidden;
	white-space: nowrap;
}

/* ==========================================================================
   12. Thumbnail-Strip (opt-in, §461)
   Positioniert als Overlay am unteren Bildrand — sonst landet er via
   Flex-Row im `.kwl-lightbox__inner` NEBEN dem Bild und wird vom Bild
   überdeckt.
   ========================================================================== */
/* Position UND visuelle Eigenschaften IMMER am Base-Selektor — `:has()` toggelt
   nur display. Sonst „hüpft" der Strip beim ersten Render von der Flex-Mitte
   in die fixed-Position. */
.kwl-lightbox__strip {
	display: none;
	position: fixed;
	bottom: 92px; /* Über Counter (16px) + Caption (48px) + Spacing */
	left: 50%;
	transform: translateX(-50%);
	z-index: 18;
	gap: 6px;
	padding: 8px 12px;
	overflow-x: auto;
	scrollbar-width: thin;
	scroll-behavior: smooth;
	background: rgb(0 0 0 / 0.6);
	border-radius: 8px;
	max-width: calc(100vw - 32px);
	/* Eigener View-Transition-Layer: sonst wird der Strip beim Bildwechsel
	   vom crossfadenden Bild (`view-transition-name: kwl-lightbox-image`)
	   in den Root-Snapshot mit eingerollt und kurz halbtransparent überdeckt. */
	view-transition-name: kwl-lightbox-strip;
}

.kwl-lightbox__strip:has(.kwl-lightbox__thumb) {
	display: flex;
}

/* Nur auf Desktop einblenden (Mobil = Touch-Swipe + Chevrons reichen).
   Gleiche Spezifitaet wie `:has()`-Regel (0,2,0). */
@media (hover: none) {
	.kwl-lightbox__strip:has(.kwl-lightbox__thumb) {
		display: none;
	}
}

.kwl-lightbox__thumb {
	flex: 0 0 auto;
	width: 56px;
	height: 56px;
	padding: 0;
	border: 2px solid transparent;
	border-radius: 6px;
	background: transparent;
	cursor: pointer;
	overflow: hidden;
	transition: border-color .15s ease, transform .15s ease;
}

.kwl-lightbox__thumb img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	display: block;
}

.kwl-lightbox__thumb:hover {
	transform: translateY(-2px);
	border-color: rgb(255 255 255 / 0.5);
}

.kwl-lightbox__thumb:focus-visible {
	outline: 3px solid var(--kwl-lb-focus);
	outline-offset: 2px;
}

.kwl-lightbox__thumb[aria-current="true"] {
	border-color: var(--kwl-accent, #BD9B5C);
	transform: translateY(-2px);
}