/*
 * NETZLICHT Galerie — Frontend-Styles (auto-enqueued via block.json "style").
 * Gescopet auf .nl-gal, KEIN !important. Default-Raster: DOM = visuelle = Tab-
 * Reihenfolge. Masonry opt-in (row-major) hinter @supports, Raster-Fallback.
 *
 * Akzentfarbe aus der WordPress-Theme-Palette (--wp--preset--color--*). Der
 * Bild-Stil (Abstand/Radius/Rahmen/Schatten/Hover) kommt ueber Block-Optionen als
 * CSS-Variablen. Lightbox-Chrome ist theme-unabhaengig (dunkles Overlay), aber
 * ueber Variablen ueberschreibbar — keine fest verdrahteten Markenfarben.
 */
.nl-gal {
	--nl-gal-accent: var( --wp--preset--color--primary, currentColor );
	--nl-gal-border: color-mix( in srgb, currentColor 18%, transparent );
	--nl-gal-surface: color-mix( in srgb, currentColor 6%, transparent );

	--nl-gal-cols: 3;
	--nl-gal-gap: 16px;
	--nl-gal-img-radius: 6px;
	--nl-gal-img-bw: 1px;

	/* Lightbox-Chrome (funktional dunkles Overlay, ueberschreibbar) */
	--nl-gal-lb-backdrop: rgba( 10, 10, 12, 0.88 );
	--nl-gal-lb-on: #fff;

	margin: 1.5rem 0;
}

/* .nl-gal-Praefix (0,2,0): Theme-Content-Regeln wie ".single-content h2/figure
 * { margin: ... }" (0,1,1) wuerden einfache Klassen-Selektoren schlagen. */
.nl-gal .nl-gal__heading {
	margin: 0 0 0.75rem;
}

/* Titel-/Bildunterschrift-Farbe nur, wenn per Block-Option gesetzt (Bedingungs-
 * klasse). Ein var()-Fallback wuerde die Theme-Default-Farbe zu 'inherit' zwingen
 * (invalid at computed-value time), darum die Regel an die Klasse binden. */
.nl-gal--heading-color .nl-gal__heading {
	color: var( --nl-gal-heading-color );
}

.nl-gal__grid {
	display: grid;
	grid-template-columns: repeat( var( --nl-gal-cols ), minmax( 0, 1fr ) );
	gap: var( --nl-gal-gap );
}

/* Masonry nur, wo der Browser es kann (row-major -> Reihenfolge bleibt erhalten). */
/* Bewusst OHNE reading-flow: die Eigenschaft gibt es nur in Chrome/Edge/
   Opera ab 137, masonry umgekehrt nur in Firefox — sie ueberschneiden sich
   in keinem Browser. Snapshot docs/vendor-specs/mdn-reading-flow-masonry-2026-08-15.md */
@supports ( grid-template-rows: masonry ) {
	.nl-gal--masonry .nl-gal__grid {
		grid-template-rows: masonry;
		align-tracks: start;
	}

	.nl-gal--masonry .nl-gal__trigger,
	.nl-gal--masonry .nl-gal__link {
		aspect-ratio: auto;
	}
}

/* Schmale Viewports: automatische Spaltenzahl unabhaengig von der Einstellung. */
@media ( max-width: 600px ) {
	.nl-gal__grid {
		grid-template-columns: repeat( auto-fill, minmax( 130px, 1fr ) );
	}
}

.nl-gal .nl-gal__item {
	margin: 0;
	display: flex;
	flex-direction: column;
	gap: 0.4rem;
}

.nl-gal__trigger,
.nl-gal__link {
	display: grid;
	place-items: center;
	width: 100%;
	padding: 0;
	margin: 0;
	/* Stabile Textfarbe erben statt Browser-/Theme-<button>/<a>-Default: haelt
	 * currentColor konstant, damit der currentColor-Default-Rahmen (--nl-gal-border)
	 * beim Hover nicht auf eine Theme-Linkfarbe umschlaegt. */
	color: inherit;
	border: var( --nl-gal-img-bw ) solid var( --nl-gal-img-bc, var( --nl-gal-border ) );
	border-radius: var( --nl-gal-img-radius );
	overflow: hidden;
	background: var( --nl-gal-surface );
	cursor: pointer;
	aspect-ratio: 4 / 3;
	transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.nl-gal__trigger:hover,
.nl-gal__link:hover {
	border-color: var( --nl-gal-img-bc-hover, var( --nl-gal-img-bc, var( --nl-gal-border ) ) );
}

.nl-gal__trigger img,
.nl-gal__link img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	display: block;
	transition: transform 0.3s ease;
}

/* Typ-Icon in Nicht-Bild-Kacheln: via place-items des Grid-Containers mittig. */
.nl-gal__icon {
	width: 48px;
	height: 48px;
	color: var( --nl-gal-accent );
}

/* Optionaler Schatten je Bild (Block-Option: Leicht / Mittel / Stark) */
.nl-gal--shadow-sm .nl-gal__trigger,
.nl-gal--shadow-sm .nl-gal__link {
	box-shadow: 0 1px 4px rgba( 0, 0, 0, 0.12 );
}

.nl-gal--shadow-md .nl-gal__trigger,
.nl-gal--shadow-md .nl-gal__link {
	box-shadow: 0 3px 10px rgba( 0, 0, 0, 0.16 );
}

.nl-gal--shadow-lg .nl-gal__trigger,
.nl-gal--shadow-lg .nl-gal__link {
	box-shadow: 0 8px 24px rgba( 0, 0, 0, 0.24 );
}

/* Hover „Zoom": Bild skaliert im Rahmen (overflow:hidden) */
.nl-gal--hover-zoom .nl-gal__trigger:hover img,
.nl-gal--hover-zoom .nl-gal__link:hover img {
	transform: scale( 1.06 );
}

/* Hover „Anheben": Karte hebt + Schatten */
.nl-gal--hover-lift .nl-gal__trigger:hover,
.nl-gal--hover-lift .nl-gal__link:hover {
	transform: translateY( -4px );
	box-shadow: 0 10px 24px rgba( 0, 0, 0, 0.22 );
}

.nl-gal__trigger:focus-visible,
.nl-gal__link:focus-visible {
	outline: 3px solid var( --nl-gal-accent );
	outline-offset: 2px;
}

.nl-gal__caption {
	font-size: 0.9em;
}

.nl-gal--caption-color .nl-gal__caption {
	color: var( --nl-gal-caption-color );
}

/* Leere Quelle (gleicher Hinweis wie Listen-Block/Shortcode) */
.nl-gal__empty {
	color: color-mix( in srgb, currentColor 85%, transparent );
	font-style: italic;
}

/* ── Lightbox-Dialog (natives <dialog>, transparenter Vollbild-Layer) ─────── */
.nl-gal__lightbox {
	max-width: 100vw;
	max-height: 100vh;
	width: 100vw;
	height: 100vh;
	margin: 0;
	padding: 0;
	border: 0;
	background: transparent;
	overflow: hidden;
}

/* display NUR im offenen Zustand — sonst ueberschreibt es das
 * dialog:not([open]) { display:none }, und Bild + Buttons blieben dauerhaft
 * sichtbar (auch nach dem Schliessen, auch beim Scrollen). */
.nl-gal__lightbox[open] {
	display: grid;
	place-items: center;
}

.nl-gal__lightbox::backdrop {
	background: var( --nl-gal-lb-backdrop );
	-webkit-backdrop-filter: blur( 4px );
	backdrop-filter: blur( 4px );
}

.nl-gal .nl-gal__lightbox-figure {
	margin: 0;
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: 0.75rem;
	padding: 1.5rem;
	max-width: 100%;
	max-height: 100%;
}

.nl-gal__lightbox-img {
	max-width: min( 92vw, 1200px );
	max-height: 82vh;
	width: auto;
	height: auto;
	object-fit: contain;
	display: block;
	/* Rahmen/Radius/Schatten ueber Block-Optionen (Lightbox-Bild). Rahmenbreite
	 * default 0 -> kein Rahmen; der Schatten kommt aus .nl-gal--lb-shadow-*. */
	border: var( --nl-gal-lb-img-bw, 0 ) solid var( --nl-gal-lb-img-bc, transparent );
	border-radius: var( --nl-gal-lb-img-radius, 8px );
}

/* Lightbox-Bild-Schatten (Block-Option; Default "lg" = bisheriger Look) */
.nl-gal--lb-shadow-none .nl-gal__lightbox-img { box-shadow: none; }
.nl-gal--lb-shadow-sm .nl-gal__lightbox-img { box-shadow: 0 4px 16px rgba( 0, 0, 0, 0.35 ); }
.nl-gal--lb-shadow-md .nl-gal__lightbox-img { box-shadow: 0 8px 32px rgba( 0, 0, 0, 0.45 ); }
.nl-gal--lb-shadow-lg .nl-gal__lightbox-img { box-shadow: 0 12px 48px rgba( 0, 0, 0, 0.5 ); }

.nl-gal__lightbox-caption {
	color: var( --nl-gal-lb-caption, var( --nl-gal-lb-on ) );
	font-size: 0.95em;
	line-height: 1.4;
	text-align: center;
	max-width: 80ch;
	text-shadow: 0 1px 3px rgba( 0, 0, 0, 0.6 );
}

.nl-gal__lightbox-caption:empty {
	display: none;
}

/* Screenreader-Statuszeile "Bild x von y" — visuell versteckt, aria-live liest sie.
 * Eigene Regel (nicht auf die Theme-/Core-Klasse .screen-reader-text verlassen). */
.nl-gal__lightbox-status {
	position: absolute;
	width: 1px;
	height: 1px;
	margin: -1px;
	padding: 0;
	overflow: hidden;
	clip: rect( 0 0 0 0 );
	clip-path: inset( 50% );
	white-space: nowrap;
	border: 0;
}

.nl-gal__close {
	position: fixed;
	top: 1rem;
	right: 1rem;
	width: 2.75rem;
	height: 2.75rem;
	min-width: 2.75rem;
	box-sizing: border-box;
	padding: 0;
	margin: 0;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	font-size: 1.5rem;
	line-height: 1;
	color: var( --nl-gal-lb-ctrl, var( --nl-gal-lb-on ) );
	background: var( --nl-gal-lb-ctrl-bg, rgba( 0, 0, 0, 0.55 ) );
	border: 0;
	border-radius: 50%;
	cursor: pointer;
	transition: background 0.15s ease, transform 0.15s ease;
}

/* Themes stylen button:focus mit ihren Hover-Farben (Kadence: color/background
 * aus --global-palette-btn-* + box-shadow — verifiziert im Live-CSS 2026-07-02).
 * Eigene :focus-Regel pinnt das Lightbox-Chrome; der sichtbare Ring kommt nur
 * bei Tastatur-Fokus ueber :focus-visible (WCAG 2.4.7 bleibt erfuellt). Steht
 * VOR :hover, damit Hover auf dem fokussierten Button weiterhin invertiert. */
.nl-gal__close:focus {
	color: var( --nl-gal-lb-ctrl, var( --nl-gal-lb-on ) );
	background: var( --nl-gal-lb-ctrl-bg, rgba( 0, 0, 0, 0.55 ) );
	box-shadow: none;
	outline: 0;
}

/* Hover invertiert: heller Grund, dunkles Symbol. */
.nl-gal__close:hover {
	background: var( --nl-gal-lb-ctrl-hover-bg, var( --nl-gal-lb-on ) );
	color: var( --nl-gal-lb-ctrl-hover, #111 );
}

.nl-gal__close:active {
	transform: scale( 0.94 );
}

.nl-gal__close:focus-visible {
	outline: 3px solid var( --nl-gal-lb-on );
	outline-offset: 2px;
}

/* Vor/Zurueck-Buttons (nur bei mehreren Bildern gerendert) */
.nl-gal__nav {
	position: fixed;
	top: 50%;
	transform: translateY( -50% );
	width: 3rem;
	height: 3rem;
	min-width: 3rem;
	box-sizing: border-box;
	padding: 0;
	margin: 0;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	font-size: 2rem;
	line-height: 1;
	color: var( --nl-gal-lb-ctrl, var( --nl-gal-lb-on ) );
	background: var( --nl-gal-lb-ctrl-bg, rgba( 0, 0, 0, 0.55 ) );
	border: 0;
	border-radius: 50%;
	cursor: pointer;
	transition: background 0.15s ease;
}

/* Theme-button:focus abwehren, Ring nur fuer Tastatur — wie beim Schliessen-Button. */
.nl-gal__nav:focus {
	color: var( --nl-gal-lb-ctrl, var( --nl-gal-lb-on ) );
	background: var( --nl-gal-lb-ctrl-bg, rgba( 0, 0, 0, 0.55 ) );
	box-shadow: none;
	outline: 0;
}

/* Hover invertiert: heller Grund, dunkles Symbol. */
.nl-gal__nav:hover {
	background: var( --nl-gal-lb-ctrl-hover-bg, var( --nl-gal-lb-on ) );
	color: var( --nl-gal-lb-ctrl-hover, #111 );
}

.nl-gal__nav:focus-visible {
	outline: 3px solid var( --nl-gal-lb-on );
	outline-offset: 2px;
}

.nl-gal__nav--prev { left: 1rem; }
.nl-gal__nav--next { right: 1rem; }

@media ( prefers-reduced-motion: reduce ) {
	.nl-gal__trigger,
	.nl-gal__link,
	.nl-gal__trigger img,
	.nl-gal__link img,
	.nl-gal__close {
		transition: none;
	}
}

@media ( prefers-reduced-motion: no-preference ) {
	.nl-gal__lightbox[open] {
		animation: nl-gal-fade 0.2s ease-out;
	}
}

@keyframes nl-gal-fade {
	from { opacity: 0; }
	to { opacity: 1; }
}