/**
 * GDC Photography & Media System
 *
 * Hero image with cinematic overlays, photo gallery grid,
 * lightbox viewer, LQIP loading, dark theme enhancement,
 * and WhatsApp share optimization.
 *
 * Overlay stack (z-index within hero):
 *   1 — vignette (radial-gradient, dark edges)
 *   2 — linear gradient (top-to-bottom)
 *   3 — color tint (semi-transparent dark blue)
 *   4 — text safe zone (bottom 40%)
 *   5 — content (title, subtitle, CTA)
 *
 * Tokens sourced from tokens.css (layer 1 + 2).
 *
 * @package GDC
 * @since   1.0.0
 */

/* ==========================================================
   COMPONENT TOKENS — photography-scoped overrides
   ========================================================== */

:root {
	/* Hero heights per breakpoint */
	--gdc-hero-height-mobile:  85vh;
	--gdc-hero-height-tablet:  75vh;
	--gdc-hero-height-desktop: 65vh;

	/* Overlay opacities */
	--gdc-hero-vignette-opacity:  0.6;
	--gdc-hero-gradient-opacity:  0.5;
	--gdc-hero-tint-opacity:      0.3;

	/* Dark theme photo enhancement */
	--gdc-photo-saturate:   1.2;
	--gdc-photo-brightness: 1.05;

	/* Gallery */
	--gdc-gallery-gap:          var(--gdc-space-2);
	--gdc-gallery-aspect-ratio: 4 / 3;
	--gdc-gallery-cols-mobile:  2;
	--gdc-gallery-cols-desktop: 3;

	/* LQIP / loading */
	--gdc-image-fade-duration: var(--gdc-duration-slow);
}


/* ==========================================================
   KEYFRAMES
   ========================================================== */

@keyframes gdc-image-fade-in {
	0%   { opacity: 0; }
	100% { opacity: 1; }
}

@keyframes gdc-lightbox-fade-in {
	0%   { opacity: 0; }
	100% { opacity: 1; }
}

@keyframes gdc-lightbox-fade-out {
	0%   { opacity: 1; }
	100% { opacity: 0; }
}

@keyframes gdc-lightbox-scale-in {
	0%   { opacity: 0; transform: scale(0.92) translateZ(0); }
	100% { opacity: 1; transform: scale(1) translateZ(0); }
}

@keyframes gdc-lightbox-scale-out {
	0%   { opacity: 1; transform: scale(1) translateZ(0); }
	100% { opacity: 0; transform: scale(0.92) translateZ(0); }
}

@keyframes gdc-skeleton-shimmer {
	0%   { background-position: 200% 0; }
	100% { background-position: -200% 0; }
}


/* ==========================================================
   HERO IMAGE CONTAINER
   ========================================================== */

.gdc-hero {
	position: relative;
	width: 100%;
	height: var(--gdc-hero-height-mobile);
	overflow: hidden;
}

@media (min-width: 768px) {
	.gdc-hero {
		height: var(--gdc-hero-height-tablet);
	}
}

@media (min-width: 1200px) {
	.gdc-hero {
		height: var(--gdc-hero-height-desktop);
	}
}


/* ==========================================================
   HERO IMAGE — <picture> / <img> element
   ========================================================== */

.gdc-hero__image {
	position: absolute;
	inset: 0;
	z-index: 0;
}

.gdc-hero__image img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	object-position: center;
	display: block;

	/* Dark theme photo enhancement */
	filter: saturate(var(--gdc-photo-saturate)) brightness(var(--gdc-photo-brightness));
}


/* ==========================================================
   OVERLAY LAYERS — stacked via z-index within .gdc-hero
   ========================================================== */

/* Layer 1: Vignette — radial gradient, dark edges */
.gdc-hero__vignette {
	position: absolute;
	inset: 0;
	z-index: 1;
	pointer-events: none;

	background: radial-gradient(
		ellipse at center,
		transparent 40%,
		rgba(10, 10, 10, var(--gdc-hero-vignette-opacity)) 100%
	);
}

/* Layer 2: Linear gradient — top-to-bottom darkening */
.gdc-hero__gradient {
	position: absolute;
	inset: 0;
	z-index: 2;
	pointer-events: none;

	background: linear-gradient(
		180deg,
		rgba(10, 10, 10, 0.1) 0%,
		rgba(10, 10, 10, var(--gdc-hero-gradient-opacity)) 100%
	);
}

/* Layer 3: Color tint — semi-transparent dark blue */
.gdc-hero__tint {
	position: absolute;
	inset: 0;
	z-index: 3;
	pointer-events: none;

	background: rgba(13, 17, 23, var(--gdc-hero-tint-opacity));
}


/* ==========================================================
   TEXT SAFE ZONE — bottom 40% of hero
   ========================================================== */

.gdc-hero__content {
	position: absolute;
	left: 0;
	right: 0;
	bottom: 0;
	z-index: 5;

	display: flex;
	flex-direction: column;
	justify-content: flex-end;
	height: 40%;
	padding: var(--gdc-space-6);

	background: linear-gradient(
		180deg,
		transparent 0%,
		var(--gdc-bg-abyss) 100%
	);
}

.gdc-hero__title {
	margin: 0 0 var(--gdc-space-1) 0;

	font-family: var(--gdc-font-heading);
	font-size: var(--gdc-text-5xl);
	font-weight: var(--gdc-font-light);
	line-height: var(--gdc-leading-tight);
	letter-spacing: var(--gdc-tracking-tight);
	color: var(--gdc-text-primary);
}

@media (min-width: 768px) {
	.gdc-hero__title {
		font-size: var(--gdc-text-7xl);
	}
}

@media (min-width: 1200px) {
	.gdc-hero__title {
		font-size: var(--gdc-text-8xl);
	}
}

.gdc-hero__subtitle {
	margin: 0 0 var(--gdc-space-3) 0;

	font-family: var(--gdc-font-sans);
	font-size: var(--gdc-text-lg);
	font-weight: var(--gdc-font-regular);
	line-height: var(--gdc-leading-normal);
	color: var(--gdc-text-secondary);
}

@media (min-width: 768px) {
	.gdc-hero__subtitle {
		font-size: var(--gdc-text-xl);
	}
}

.gdc-hero__cta {
	align-self: flex-start;
}


/* ==========================================================
   IMAGE LOADING — LQIP + fade transition
   ========================================================== */

.gdc-image-wrap {
	position: relative;
	overflow: hidden;
	background: var(--gdc-bg-abyss);
}

/* LQIP placeholder — blurred thumbnail */
.gdc-image-wrap__lqip {
	position: absolute;
	inset: 0;
	z-index: 1;

	width: 100%;
	height: 100%;
	object-fit: cover;

	filter: blur(20px);
	transform: scale(1.1); /* hide blur edges */
	transition: opacity var(--gdc-image-fade-duration) var(--gdc-ease-default);
}

.gdc-image-wrap[data-loaded="true"] .gdc-image-wrap__lqip {
	opacity: 0;
	pointer-events: none;
}

/* Skeleton shimmer for images without LQIP */
.gdc-image-wrap__skeleton {
	position: absolute;
	inset: 0;
	z-index: 1;

	background: linear-gradient(
		90deg,
		var(--gdc-bg-abyss) 0%,
		var(--gdc-bg-surface) 50%,
		var(--gdc-bg-abyss) 100%
	);
	background-size: 200% 100%;
	animation: gdc-skeleton-shimmer 2s ease-in-out infinite;
	transition: opacity var(--gdc-image-fade-duration) var(--gdc-ease-default);
}

.gdc-image-wrap[data-loaded="true"] .gdc-image-wrap__skeleton {
	opacity: 0;
	pointer-events: none;
}

/* Full image — fades in over placeholder */
.gdc-image-wrap__img {
	position: relative;
	z-index: 2;

	width: 100%;
	height: 100%;
	object-fit: cover;
	display: block;

	opacity: 0;
	transition: opacity var(--gdc-image-fade-duration) var(--gdc-ease-default);
}

.gdc-image-wrap[data-loaded="true"] .gdc-image-wrap__img {
	opacity: 1;
}


/* ==========================================================
   PHOTO GALLERY — responsive grid
   ========================================================== */

.gdc-gallery {
	display: grid;
	grid-template-columns: repeat(var(--gdc-gallery-cols-mobile), 1fr);
	gap: var(--gdc-gallery-gap);
	width: 100%;
}

@media (min-width: 1024px) {
	.gdc-gallery {
		grid-template-columns: repeat(var(--gdc-gallery-cols-desktop), 1fr);
	}
}

/* Gallery item */
.gdc-gallery__item {
	position: relative;
	aspect-ratio: var(--gdc-gallery-aspect-ratio);
	overflow: hidden;
	border-radius: var(--gdc-radius-md);
	cursor: pointer;
	background: var(--gdc-bg-abyss);
}

.gdc-gallery__item img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	display: block;

	filter: saturate(var(--gdc-photo-saturate)) brightness(var(--gdc-photo-brightness));
	transition: var(--gdc-image-hover-transition);
}

.gdc-gallery__item:hover img {
	transform: scale(var(--gdc-image-hover-scale));
}

.gdc-gallery__item:focus-visible {
	outline: 2px solid var(--gdc-accent-cta);
	outline-offset: 2px;
}

/* Gallery caption overlay */
.gdc-gallery__caption {
	position: absolute;
	left: 0;
	right: 0;
	bottom: 0;
	padding: var(--gdc-space-1) var(--gdc-space-2);

	background: linear-gradient(transparent, rgba(10, 10, 10, 0.7));

	font-family: var(--gdc-font-sans);
	font-size: var(--gdc-text-sm);
	color: var(--gdc-text-primary);

	opacity: 0;
	transition: opacity var(--gdc-duration-fast) var(--gdc-ease-default);
}

.gdc-gallery__item:hover .gdc-gallery__caption {
	opacity: 1;
}


/* ==========================================================
   LIGHTBOX — full-screen image viewer
   ========================================================== */

.gdc-lightbox {
	position: fixed;
	inset: 0;
	z-index: 1100;

	display: flex;
	align-items: center;
	justify-content: center;

	background: rgba(0, 0, 0, 0.9);

	animation: gdc-lightbox-fade-in var(--gdc-duration-standard) var(--gdc-ease-out) forwards;

	will-change: opacity;
}

.gdc-lightbox[data-state="hidden"] {
	display: none;
}

.gdc-lightbox[data-state="closing"] {
	animation: gdc-lightbox-fade-out 150ms var(--gdc-ease-out) forwards;
}

/* Lightbox image */
.gdc-lightbox__image {
	max-width: 90vw;
	max-height: 85vh;
	object-fit: contain;
	border-radius: var(--gdc-radius-sm);

	animation: gdc-lightbox-scale-in var(--gdc-duration-standard) var(--gdc-ease-out) forwards;
	will-change: transform, opacity;
}

.gdc-lightbox[data-state="closing"] .gdc-lightbox__image {
	animation: gdc-lightbox-scale-out 150ms var(--gdc-ease-out) forwards;
}

/* Lightbox close button */
.gdc-lightbox__close {
	position: absolute;
	top: var(--gdc-space-3);
	right: var(--gdc-space-3);
	z-index: 1;

	display: inline-flex;
	align-items: center;
	justify-content: center;

	width: 44px;
	height: 44px;
	padding: 0;
	border: none;
	border-radius: var(--gdc-radius-full);
	background: rgba(255, 255, 255, 0.1);
	cursor: pointer;

	color: var(--gdc-text-primary);
	font-size: var(--gdc-text-xl);

	transition:
		background-color var(--gdc-duration-fast) var(--gdc-ease-out),
		color var(--gdc-duration-fast) var(--gdc-ease-out);
}

.gdc-lightbox__close:hover {
	background: rgba(255, 255, 255, 0.2);
}

.gdc-lightbox__close:focus-visible {
	outline: 2px solid var(--gdc-accent-cta);
	outline-offset: 2px;
}

/* Lightbox navigation */
.gdc-lightbox__nav {
	position: absolute;
	top: 50%;
	transform: translateY(-50%);

	display: inline-flex;
	align-items: center;
	justify-content: center;

	width: 48px;
	height: 48px;
	padding: 0;
	border: none;
	border-radius: var(--gdc-radius-full);
	background: rgba(255, 255, 255, 0.1);
	cursor: pointer;

	color: var(--gdc-text-primary);
	font-size: var(--gdc-text-xl);

	transition: background-color var(--gdc-duration-fast) var(--gdc-ease-out);
}

.gdc-lightbox__nav:hover {
	background: rgba(255, 255, 255, 0.2);
}

.gdc-lightbox__nav:focus-visible {
	outline: 2px solid var(--gdc-accent-cta);
	outline-offset: 2px;
}

.gdc-lightbox__nav--prev {
	left: var(--gdc-space-3);
}

.gdc-lightbox__nav--next {
	right: var(--gdc-space-3);
}

/* Lightbox counter */
.gdc-lightbox__counter {
	position: absolute;
	bottom: var(--gdc-space-3);
	left: 50%;
	transform: translateX(-50%);

	font-family: var(--gdc-font-sans);
	font-size: var(--gdc-text-sm);
	color: var(--gdc-text-secondary);
}


/* ==========================================================
   WHATSAPP SHARE OPTIMIZATION
   ========================================================== */

.gdc-share-image {
	aspect-ratio: 9 / 16;
	max-width: 100%;
	object-fit: cover;
}

.gdc-share-image--high-contrast {
	filter: contrast(1.1) saturate(1.15);
}


/* ==========================================================
   REDUCED MOTION
   ========================================================== */

@media (prefers-reduced-motion: reduce) {
	.gdc-hero__image img,
	.gdc-gallery__item img,
	.gdc-image-wrap__img,
	.gdc-image-wrap__lqip,
	.gdc-image-wrap__skeleton {
		transition: none;
	}

	.gdc-lightbox,
	.gdc-lightbox__image {
		animation-duration: 1ms !important;
	}

	.gdc-image-wrap__skeleton {
		animation: none;
	}
}