/**
 * Frontend styles for Photo Album Gallery Manager.
 *
 * A modern, minimal, professional photography portfolio design system.
 *
 * @package Photo_Album_Gallery_Manager
 */

/* ─── CSS Custom Properties ────────────────────────────────────── */

:root {
	--pagm-bg: #0a0a0a;
	--pagm-surface: #141414;
	--pagm-surface-hover: #1e1e1e;
	--pagm-border: #2a2a2a;
	--pagm-text: #f5f5f5;
	--pagm-text-muted: #9a9a9a;
	--pagm-accent: #d4af37;
	--pagm-accent-light: #e8cf7a;
	--pagm-overlay: rgba(0, 0, 0, 0.65);
	--pagm-overlay-dark: rgba(0, 0, 0, 0.85);
	--pagm-radius: 8px;
	--pagm-radius-lg: 16px;
	--pagm-gap: 16px;
	--pagm-transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
	--pagm-transition-fast: 0.25s ease;
	--pagm-font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
	--pagm-columns: 3;
}

/* ─── Base Reset (scoped) ──────────────────────────────────────── */

.pagm-albums-grid,
.pagm-single-album,
.pagm-album-detail {
	font-family: var(--pagm-font);
	box-sizing: border-box;
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
}

.pagm-albums-grid *,
.pagm-single-album *,
.pagm-album-detail * {
	box-sizing: border-box;
}

/* ─── Album Grid (all albums view) ─────────────────────────────── */

.pagm-albums-grid {
	display: grid;
	grid-template-columns: repeat(var(--pagm-columns), 1fr);
	gap: var(--pagm-gap);
	padding: 20px 0;
}

.pagm-albums-grid.pagm-layout-masonry {
	display: block;
	column-count: var(--pagm-columns);
	column-gap: var(--pagm-gap);
}

.pagm-albums-grid.pagm-layout-masonry .pagm-album-card {
	break-inside: avoid;
	margin-bottom: var(--pagm-gap);
}

/* ─── Album Card ───────────────────────────────────────────────── */

.pagm-album-card {
	position: relative;
	border-radius: var(--pagm-radius);
	overflow: hidden;
	background: var(--pagm-surface);
	opacity: 0;
	transform: translateY(30px);
	animation: pagmFadeInUp 0.6s ease forwards;
}

.pagm-album-card:nth-child(1)  { animation-delay: 0.05s; }
.pagm-album-card:nth-child(2)  { animation-delay: 0.10s; }
.pagm-album-card:nth-child(3)  { animation-delay: 0.15s; }
.pagm-album-card:nth-child(4)  { animation-delay: 0.20s; }
.pagm-album-card:nth-child(5)  { animation-delay: 0.25s; }
.pagm-album-card:nth-child(6)  { animation-delay: 0.30s; }
.pagm-album-card:nth-child(7)  { animation-delay: 0.35s; }
.pagm-album-card:nth-child(8)  { animation-delay: 0.40s; }
.pagm-album-card:nth-child(9)  { animation-delay: 0.45s; }
.pagm-album-card:nth-child(10) { animation-delay: 0.50s; }
.pagm-album-card:nth-child(11) { animation-delay: 0.55s; }
.pagm-album-card:nth-child(12) { animation-delay: 0.60s; }

@keyframes pagmFadeInUp {
	to {
		opacity: 1;
		transform: translateY(0);
	}
}

.pagm-album-link {
	display: block;
	text-decoration: none;
	color: inherit;
}

.pagm-album-cover {
	position: relative;
	overflow: hidden;
	aspect-ratio: 4 / 3;
}

.pagm-albums-grid.pagm-layout-masonry .pagm-album-cover {
	aspect-ratio: unset;
}

.pagm-cover-img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	display: block;
	transition: transform var(--pagm-transition);
}

.pagm-album-card:hover .pagm-cover-img {
	transform: scale(1.08);
}

/* ─── Album Overlay ────────────────────────────────────────────── */

.pagm-album-overlay {
	position: absolute;
	inset: 0;
	background: linear-gradient(
		180deg,
		transparent 30%,
		rgba(0, 0, 0, 0.3) 60%,
		rgba(0, 0, 0, 0.8) 100%
	);
	display: flex;
	flex-direction: column;
	justify-content: flex-end;
	align-items: flex-start;
	padding: 24px;
	opacity: 0;
	transition: opacity var(--pagm-transition);
}

.pagm-album-card:hover .pagm-album-overlay {
	opacity: 1;
}

.pagm-overlay-content {
	transform: translateY(12px);
	transition: transform var(--pagm-transition);
}

.pagm-album-card:hover .pagm-overlay-content {
	transform: translateY(0);
}

.pagm-card-title {
	font-size: 1.25rem;
	font-weight: 600;
	color: #fff;
	margin: 0 0 6px;
	letter-spacing: 0.02em;
	line-height: 1.3;
}

.pagm-card-count {
	font-size: 0.85rem;
	color: var(--pagm-accent-light);
	font-weight: 400;
	letter-spacing: 0.04em;
	text-transform: uppercase;
}

.pagm-card-category {
	display: inline-block;
	margin-top: 8px;
	padding: 3px 10px;
	background: rgba(255, 255, 255, 0.12);
	backdrop-filter: blur(8px);
	border-radius: 20px;
	font-size: 0.75rem;
	color: rgba(255, 255, 255, 0.85);
	letter-spacing: 0.04em;
	text-transform: uppercase;
}

.pagm-view-btn {
	position: absolute;
	top: 16px;
	right: 16px;
	padding: 6px 16px;
	background: var(--pagm-accent);
	color: #0a0a0a;
	font-size: 0.78rem;
	font-weight: 600;
	border-radius: 20px;
	text-transform: uppercase;
	letter-spacing: 0.06em;
	opacity: 0;
	transform: translateY(-8px);
	transition: all var(--pagm-transition);
}

.pagm-album-card:hover .pagm-view-btn {
	opacity: 1;
	transform: translateY(0);
}

/* ─── Single Album ─────────────────────────────────────────────── */

.pagm-single-album {
	padding: 20px 0;
}

.pagm-album-header {
	text-align: center;
	margin-bottom: 40px;
	padding-bottom: 30px;
	border-bottom: 1px solid var(--pagm-border);
}

.pagm-album-title {
	font-size: 2.2rem;
	font-weight: 300;
	color: var(--pagm-text);
	margin: 0 0 12px;
	letter-spacing: 0.04em;
}

.pagm-album-description {
	font-size: 1rem;
	color: var(--pagm-text-muted);
	max-width: 640px;
	margin: 0 auto 16px;
	line-height: 1.7;
}

.pagm-album-count {
	display: inline-block;
	font-size: 0.85rem;
	color: var(--pagm-accent);
	letter-spacing: 0.1em;
	text-transform: uppercase;
	font-weight: 500;
}

/* ─── Images Grid ──────────────────────────────────────────────── */

.pagm-images-grid {
	display: grid;
	grid-template-columns: repeat(var(--pagm-columns), 1fr);
	gap: var(--pagm-gap);
}

.pagm-images-grid.pagm-layout-masonry {
	display: block;
	column-count: var(--pagm-columns);
	column-gap: var(--pagm-gap);
}

.pagm-images-grid.pagm-layout-masonry .pagm-image-item {
	break-inside: avoid;
	margin-bottom: var(--pagm-gap);
}

.pagm-images-grid.pagm-layout-justified {
	display: flex;
	flex-wrap: wrap;
	gap: calc(var(--pagm-gap) / 2);
}

.pagm-images-grid.pagm-layout-justified .pagm-image-item {
	flex: 1 1 auto;
	height: 280px;
}

.pagm-images-grid.pagm-layout-justified .pagm-image-item img {
	height: 100%;
	width: 100%;
	object-fit: cover;
}

/* ─── Image Item ───────────────────────────────────────────────── */

.pagm-image-item {
	position: relative;
	overflow: hidden;
	border-radius: var(--pagm-radius);
	cursor: pointer;
	margin: 0;
	background: var(--pagm-surface);
	opacity: 0;
	transform: translateY(20px);
	animation: pagmFadeInUp 0.5s ease forwards;
}

.pagm-image-item:nth-child(1)  { animation-delay: 0.03s; }
.pagm-image-item:nth-child(2)  { animation-delay: 0.06s; }
.pagm-image-item:nth-child(3)  { animation-delay: 0.09s; }
.pagm-image-item:nth-child(4)  { animation-delay: 0.12s; }
.pagm-image-item:nth-child(5)  { animation-delay: 0.15s; }
.pagm-image-item:nth-child(6)  { animation-delay: 0.18s; }
.pagm-image-item:nth-child(7)  { animation-delay: 0.21s; }
.pagm-image-item:nth-child(8)  { animation-delay: 0.24s; }
.pagm-image-item:nth-child(9)  { animation-delay: 0.27s; }
.pagm-image-item:nth-child(10) { animation-delay: 0.30s; }
.pagm-image-item:nth-child(11) { animation-delay: 0.33s; }
.pagm-image-item:nth-child(12) { animation-delay: 0.36s; }

.pagm-gallery-img {
	width: 100%;
	height: auto;
	display: block;
	transition: transform var(--pagm-transition), filter var(--pagm-transition);
}

.pagm-image-item:hover .pagm-gallery-img {
	transform: scale(1.05);
	filter: brightness(0.85);
}

/* ─── Watermark Overlay ────────────────────────────────────────── */

.pagm-watermark-overlay {
	position: absolute;
	inset: 0;
	display: flex;
	align-items: center;
	justify-content: center;
	pointer-events: none;
}

.pagm-watermark-overlay::after {
	content: '© PROTECTED';
	font-size: 1.5rem;
	font-weight: 700;
	color: rgba(255, 255, 255, 0.15);
	letter-spacing: 0.3em;
	text-transform: uppercase;
	transform: rotate(-25deg);
	white-space: nowrap;
}

/* ─── Album Detail (AJAX loaded) ───────────────────────────────── */

.pagm-album-detail {
	padding: 20px 0;
}

.pagm-album-detail .pagm-back-btn {
	display: inline-flex;
	align-items: center;
	gap: 8px;
	padding: 10px 20px;
	background: var(--pagm-surface);
	color: var(--pagm-text);
	border: 1px solid var(--pagm-border);
	border-radius: 30px;
	font-size: 0.88rem;
	cursor: pointer;
	margin-bottom: 30px;
	transition: all var(--pagm-transition-fast);
	text-decoration: none;
	font-family: var(--pagm-font);
}

.pagm-album-detail .pagm-back-btn:hover {
	background: var(--pagm-surface-hover);
	border-color: var(--pagm-accent);
	color: var(--pagm-accent);
}

/* ─── Loading Spinner ──────────────────────────────────────────── */

.pagm-loading {
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	padding: 80px 20px;
	color: var(--pagm-text-muted);
}

.pagm-spinner {
	width: 40px;
	height: 40px;
	border: 3px solid var(--pagm-border);
	border-top-color: var(--pagm-accent);
	border-radius: 50%;
	animation: pagmSpin 0.8s linear infinite;
	margin-bottom: 16px;
}

@keyframes pagmSpin {
	to { transform: rotate(360deg); }
}

/* ─── Password Form ────────────────────────────────────────────── */

.pagm-password-form-wrap {
	display: flex;
	align-items: center;
	justify-content: center;
	min-height: 400px;
	padding: 40px 20px;
}

.pagm-password-form {
	text-align: center;
	max-width: 400px;
	width: 100%;
	padding: 48px 36px;
	background: var(--pagm-surface);
	border: 1px solid var(--pagm-border);
	border-radius: var(--pagm-radius-lg);
}

.pagm-lock-icon {
	color: var(--pagm-accent);
	margin-bottom: 16px;
}

.pagm-password-form h3 {
	font-size: 1.3rem;
	font-weight: 500;
	color: var(--pagm-text);
	margin: 0 0 8px;
}

.pagm-password-form p {
	font-size: 0.92rem;
	color: var(--pagm-text-muted);
	margin: 0 0 24px;
}

.pagm-password-input {
	width: 100%;
	padding: 12px 16px;
	background: var(--pagm-bg);
	border: 1px solid var(--pagm-border);
	border-radius: var(--pagm-radius);
	color: var(--pagm-text);
	font-size: 1rem;
	margin-bottom: 12px;
	outline: none;
	transition: border-color var(--pagm-transition-fast);
	font-family: var(--pagm-font);
}

.pagm-password-input:focus {
	border-color: var(--pagm-accent);
}

.pagm-password-btn {
	width: 100%;
	padding: 12px 24px;
	background: var(--pagm-accent);
	color: #0a0a0a;
	border: none;
	border-radius: var(--pagm-radius);
	font-size: 0.95rem;
	font-weight: 600;
	cursor: pointer;
	transition: all var(--pagm-transition-fast);
	letter-spacing: 0.04em;
	text-transform: uppercase;
	font-family: var(--pagm-font);
}

.pagm-password-btn:hover {
	background: var(--pagm-accent-light);
}

.pagm-password-error {
	color: #e74c3c;
	font-size: 0.88rem;
	margin-top: 12px;
}

/* ─── Social Share ─────────────────────────────────────────────── */

.pagm-social-share {
	display: flex;
	align-items: center;
	gap: 10px;
	margin-top: 20px;
	justify-content: center;
}

.pagm-share-btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 40px;
	height: 40px;
	border-radius: 50%;
	background: var(--pagm-surface);
	border: 1px solid var(--pagm-border);
	color: var(--pagm-text-muted);
	transition: all var(--pagm-transition-fast);
	text-decoration: none;
}

.pagm-share-btn:hover {
	border-color: var(--pagm-accent);
	color: var(--pagm-accent);
	transform: translateY(-2px);
}

.pagm-share-btn svg {
	width: 18px;
	height: 18px;
}

/* ─── No Albums ────────────────────────────────────────────────── */

.pagm-no-albums,
.pagm-error {
	text-align: center;
	padding: 60px 20px;
	color: var(--pagm-text-muted);
	font-size: 1.1rem;
}

/* ═══════════════════════════════════════════════════════════════════
   LIGHTBOX
   ═══════════════════════════════════════════════════════════════════ */

.pagm-lightbox {
	position: fixed;
	inset: 0;
	z-index: 999999;
	display: flex;
	align-items: center;
	justify-content: center;
	background: rgba(0, 0, 0, 0.95);
	backdrop-filter: blur(20px);
	opacity: 0;
	visibility: hidden;
	transition: opacity 0.35s ease, visibility 0.35s ease;
}

.pagm-lightbox.pagm-lightbox-active {
	opacity: 1;
	visibility: visible;
}

/* Top Bar */
.pagm-lightbox-topbar {
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	height: 56px;
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: 0 20px;
	background: linear-gradient(180deg, rgba(0, 0, 0, 0.6) 0%, transparent 100%);
	z-index: 10;
}

.pagm-lightbox-counter {
	font-size: 0.88rem;
	color: rgba(255, 255, 255, 0.7);
	font-weight: 400;
	font-family: var(--pagm-font);
	letter-spacing: 0.05em;
}

.pagm-lightbox-actions {
	display: flex;
	align-items: center;
	gap: 8px;
}

.pagm-lightbox-btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 40px;
	height: 40px;
	border: none;
	border-radius: 50%;
	background: rgba(255, 255, 255, 0.08);
	color: rgba(255, 255, 255, 0.8);
	cursor: pointer;
	transition: all 0.2s ease;
	padding: 0;
	font-family: var(--pagm-font);
}

.pagm-lightbox-btn:hover {
	background: rgba(255, 255, 255, 0.16);
	color: #fff;
}

.pagm-lightbox-btn svg {
	width: 20px;
	height: 20px;
}

/* Image Container */
.pagm-lightbox-image-wrap {
	position: relative;
	display: flex;
	align-items: center;
	justify-content: center;
	width: 100%;
	height: 100%;
	padding: 60px 80px 100px;
	user-select: none;
}

.pagm-lightbox-img {
	max-width: 100%;
	max-height: 100%;
	object-fit: contain;
	border-radius: 4px;
	opacity: 0;
	transform: scale(0.95);
	transition: opacity 0.3s ease, transform 0.3s ease;
}

.pagm-lightbox-img.pagm-img-loaded {
	opacity: 1;
	transform: scale(1);
}

/* Navigation Arrows */
.pagm-lightbox-prev,
.pagm-lightbox-next {
	position: absolute;
	top: 50%;
	transform: translateY(-50%);
	width: 48px;
	height: 48px;
	border: none;
	border-radius: 50%;
	background: rgba(255, 255, 255, 0.06);
	color: rgba(255, 255, 255, 0.7);
	cursor: pointer;
	display: flex;
	align-items: center;
	justify-content: center;
	transition: all 0.25s ease;
	z-index: 10;
	font-family: var(--pagm-font);
	padding: 0;
}

.pagm-lightbox-prev { left: 20px; }
.pagm-lightbox-next { right: 20px; }

.pagm-lightbox-prev:hover,
.pagm-lightbox-next:hover {
	background: rgba(255, 255, 255, 0.15);
	color: #fff;
	transform: translateY(-50%) scale(1.1);
}

.pagm-lightbox-prev svg,
.pagm-lightbox-next svg {
	width: 24px;
	height: 24px;
}

/* Bottom Bar — Caption & EXIF */
.pagm-lightbox-bottom {
	position: absolute;
	bottom: 0;
	left: 0;
	right: 0;
	padding: 20px 24px;
	background: linear-gradient(0deg, rgba(0, 0, 0, 0.7) 0%, transparent 100%);
	z-index: 10;
}

.pagm-lightbox-caption {
	font-size: 0.95rem;
	color: rgba(255, 255, 255, 0.9);
	margin-bottom: 6px;
	font-family: var(--pagm-font);
	line-height: 1.5;
}

.pagm-lightbox-exif {
	display: flex;
	gap: 16px;
	flex-wrap: wrap;
}

.pagm-exif-item {
	font-size: 0.78rem;
	color: rgba(255, 255, 255, 0.5);
	font-family: var(--pagm-font);
	letter-spacing: 0.04em;
}

/* Lightbox Loading */
.pagm-lightbox-loading {
	position: absolute;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
}

.pagm-lightbox-loading .pagm-spinner {
	border-color: rgba(255, 255, 255, 0.1);
	border-top-color: var(--pagm-accent);
}

/* ─── Responsive ───────────────────────────────────────────────── */

@media (max-width: 1280px) {
	.pagm-albums-grid,
	.pagm-images-grid {
		--pagm-columns: 3;
	}
}

@media (max-width: 1024px) {
	.pagm-albums-grid,
	.pagm-images-grid {
		--pagm-columns: 2;
	}

	.pagm-albums-grid.pagm-layout-masonry,
	.pagm-images-grid.pagm-layout-masonry {
		column-count: 2;
	}

	.pagm-album-title {
		font-size: 1.8rem;
	}
}

@media (max-width: 768px) {
	.pagm-album-overlay {
		opacity: 1;
	}

	.pagm-overlay-content {
		transform: translateY(0);
	}

	.pagm-view-btn {
		display: none;
	}

	.pagm-card-title {
		font-size: 1.05rem;
	}

	.pagm-album-title {
		font-size: 1.5rem;
	}

	.pagm-lightbox-image-wrap {
		padding: 56px 10px 90px;
	}

	.pagm-lightbox-prev,
	.pagm-lightbox-next {
		width: 36px;
		height: 36px;
	}

	.pagm-lightbox-prev { left: 8px; }
	.pagm-lightbox-next { right: 8px; }

	.pagm-images-grid.pagm-layout-justified .pagm-image-item {
		height: 200px;
	}
}

@media (max-width: 480px) {
	.pagm-albums-grid,
	.pagm-images-grid {
		--pagm-columns: 1;
		gap: 12px;
	}

	.pagm-albums-grid.pagm-layout-masonry,
	.pagm-images-grid.pagm-layout-masonry {
		column-count: 1;
	}

	.pagm-album-overlay {
		padding: 16px;
	}

	.pagm-lightbox-prev,
	.pagm-lightbox-next {
		display: none;
	}

	.pagm-lightbox-bottom {
		padding: 16px;
	}
}

/* ─── Archive/Single Template Wrappers ─────────────────────────── */

.pagm-archive-wrap,
.pagm-single-wrap {
	max-width: 1400px;
	margin: 0 auto;
	padding: 40px 24px;
}

.pagm-archive-title,
.pagm-single-page-title {
	font-size: 2.5rem;
	font-weight: 300;
	color: var(--pagm-text);
	text-align: center;
	margin: 0 0 10px;
	letter-spacing: 0.06em;
}

.pagm-archive-subtitle {
	text-align: center;
	font-size: 1rem;
	color: var(--pagm-text-muted);
	margin: 0 0 40px;
}

/* ─── Zoom support (lightbox) ──────────────────────────────────── */

.pagm-lightbox-img.pagm-zoomed {
	cursor: zoom-out;
	transform: scale(2);
	transition: transform 0.3s ease;
}