/**
 * Dresium Gallery Component
 *
 * Photo gallery with grid layout, selection, and lightbox support
 *
 * @package Dresium
 * @version 2.0.0
 */

/* ============================================
   GALLERY CONTAINER
   ============================================ */

.dresium-gallery {
	width: 100%;
}

.dresium-gallery__header {
	display: flex;
	align-items: center;
	justify-content: space-between;
	margin-bottom: var(--dresium-space-4);
}

.dresium-gallery__title {
	margin: 0;
	font-size: var(--dresium-text-lg);
	font-weight: var(--dresium-weight-semibold);
	color: var(--dresium-gray-900);
}

.dresium-gallery__count {
	font-size: var(--dresium-text-sm);
	color: var(--dresium-gray-500);
}

/* ============================================
   GALLERY GRID
   ============================================ */

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

/* Grid variants */
.dresium-gallery__grid--2 {
	--dresium-gallery-columns: 2;
}

.dresium-gallery__grid--4 {
	--dresium-gallery-columns: 4;
}

.dresium-gallery__grid--5 {
	--dresium-gallery-columns: 5;
}

/* ============================================
   GALLERY ITEM
   ============================================ */

.dresium-gallery__item {
	position: relative;
	aspect-ratio: 1 / 1;
	overflow: hidden;
	border-radius: var(--dresium-radius-lg);
	background-color: var(--dresium-gray-100);
	cursor: pointer;

	transition: all var(--dresium-transition-base) var(--dresium-ease);
}

.dresium-gallery__item:hover {
	transform: scale(1.02);
	box-shadow: var(--dresium-shadow-lg);
	z-index: 1;
}

.dresium-gallery__item:active {
	transform: scale(0.98);
}

/* Selected state */
.dresium-gallery__item--selected {
	outline: 4px solid var(--dresium-primary);
	outline-offset: -4px;
	box-shadow: var(--dresium-shadow-xl);
}

.dresium-gallery__item--selected::after {
	content: '✓';
	position: absolute;
	top: var(--dresium-space-2);
	right: var(--dresium-space-2);

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

	width: 24px;
	height: 24px;

	background-color: var(--dresium-primary);
	color: var(--dresium-white);
	border-radius: var(--dresium-radius-full);

	font-size: var(--dresium-text-sm);
	font-weight: var(--dresium-weight-bold);
	box-shadow: var(--dresium-shadow-md);
}

/* ============================================
   GALLERY IMAGE
   ============================================ */

.dresium-gallery__image {
	width: 100%;
	height: 100%;
	object-fit: cover;
	display: block;
}

.dresium-gallery__image--loading {
	animation: dresium-pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* ============================================
   GALLERY ITEM OVERLAY
   ============================================ */

.dresium-gallery__overlay {
	position: absolute;
	inset: 0;
	display: flex;
	align-items: center;
	justify-content: center;
	gap: var(--dresium-space-2);

	background-color: rgba(0, 0, 0, 0.6);
	opacity: 0;

	transition: opacity var(--dresium-transition-base) var(--dresium-ease);
}

.dresium-gallery__item:hover .dresium-gallery__overlay {
	opacity: 1;
}

.dresium-gallery__overlay-btn {
	width: 36px;
	height: 36px;
	padding: 0;

	background-color: var(--dresium-white);
	color: var(--dresium-gray-900);
	border: none;
	border-radius: var(--dresium-radius-lg);

	font-size: var(--dresium-text-lg);
	cursor: pointer;

	transition: all var(--dresium-transition-fast) var(--dresium-ease);
}

.dresium-gallery__overlay-btn:hover {
	background-color: var(--dresium-primary);
	color: var(--dresium-white);
	transform: scale(1.1);
}

.dresium-gallery__overlay-btn--delete {
	background-color: var(--dresium-error);
	color: var(--dresium-white);
}

.dresium-gallery__overlay-btn--delete:hover {
	background-color: #dc2626;
}

/* ============================================
   EMPTY STATE
   ============================================ */

.dresium-gallery__empty {
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	gap: var(--dresium-space-4);

	min-height: 300px;
	padding: var(--dresium-space-8);

	background-color: var(--dresium-gray-50);
	border: 2px dashed var(--dresium-gray-300);
	border-radius: var(--dresium-radius-xl);

	text-align: center;
}

.dresium-gallery__empty-icon {
	font-size: 64px;
	color: var(--dresium-gray-300);
}

.dresium-gallery__empty-title {
	margin: 0;
	font-size: var(--dresium-text-lg);
	font-weight: var(--dresium-weight-medium);
	color: var(--dresium-gray-900);
}

.dresium-gallery__empty-description {
	margin: 0;
	font-size: var(--dresium-text-sm);
	color: var(--dresium-gray-500);
}

/* ============================================
   LOADING STATE
   ============================================ */

.dresium-gallery--loading {
	position: relative;
	min-height: 300px;
}

.dresium-gallery--loading::before {
	content: '';
	position: absolute;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);

	width: 40px;
	height: 40px;
	border: 4px solid var(--dresium-gray-200);
	border-top-color: var(--dresium-primary);
	border-radius: var(--dresium-radius-full);

	animation: dresium-spin 1s linear infinite;
	z-index: 10;
}

.dresium-gallery--loading .dresium-gallery__grid {
	opacity: 0.3;
	pointer-events: none;
}

/* ============================================
   GALLERY SKELETON LOADER
   ============================================ */

.dresium-gallery__skeleton {
	aspect-ratio: 1 / 1;
	background: linear-gradient(
		90deg,
		var(--dresium-gray-200) 25%,
		var(--dresium-gray-100) 50%,
		var(--dresium-gray-200) 75%
	);
	background-size: 200% 100%;
	border-radius: var(--dresium-radius-lg);
	animation: dresium-skeleton 1.5s ease-in-out infinite;
}

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

/* ============================================
   TAB SWITCHER (Upload vs Gallery)
   ============================================ */

.dresium-tabs {
	display: flex;
	gap: var(--dresium-space-2);
	margin-bottom: var(--dresium-space-6);
	padding: var(--dresium-space-1);
	background-color: var(--dresium-gray-100);
	border-radius: var(--dresium-radius-lg);
}

.dresium-tab {
	flex: 1;
	padding: var(--dresium-space-3) var(--dresium-space-4);

	background-color: transparent;
	color: var(--dresium-gray-600);
	border: none;
	border-radius: var(--dresium-radius-base);

	font-size: var(--dresium-text-sm);
	font-weight: var(--dresium-weight-medium);
	text-align: center;
	cursor: pointer;

	transition: all var(--dresium-transition-base) var(--dresium-ease);
}

.dresium-tab:hover:not(.dresium-tab--active) {
	background-color: var(--dresium-gray-200);
	color: var(--dresium-gray-900);
}

.dresium-tab--active {
	background-color: var(--dresium-white);
	color: var(--dresium-primary);
	box-shadow: var(--dresium-shadow-sm);
}

.dresium-tab__content {
	display: none;
}

.dresium-tab__content--active {
	display: block;
	animation: dresium-fade-in var(--dresium-transition-base) var(--dresium-ease);
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
	.dresium-gallery__grid {
		--dresium-gallery-columns: 2;
	}
}

@media (max-width: 480px) {
	.dresium-gallery__grid {
		--dresium-gallery-columns: 2;
		gap: var(--dresium-space-2);
	}

	.dresium-gallery__item {
		border-radius: var(--dresium-radius-base);
	}

	.dresium-gallery__empty {
		min-height: 200px;
		padding: var(--dresium-space-6);
	}

	.dresium-gallery__empty-icon {
		font-size: 48px;
	}
}