/*
 * Insta Feed — Material Design 3 frontend
 *
 * Color tokens are injected per-instance via inline style (see Shortcode::build_color_tokens).
 * This file provides the M3 typography, shape, elevation, motion, and component layer.
 */

.insta-feed {
	/* M3 typography scale (using system stack — no external font loaded) */
	--md-sys-typescale-display-font: 'Roboto Flex', 'Roboto', system-ui, -apple-system, 'Segoe UI', Helvetica, Arial, sans-serif;
	--md-sys-typescale-body-font: 'Roboto', system-ui, -apple-system, 'Segoe UI', Helvetica, Arial, sans-serif;
	--md-sys-typescale-label-font: 'Roboto', system-ui, -apple-system, 'Segoe UI', Helvetica, Arial, sans-serif;

	/* Shape tokens */
	--md-sys-shape-corner-none: 0;
	--md-sys-shape-corner-xs: 4px;
	--md-sys-shape-corner-sm: 8px;
	--md-sys-shape-corner-md: 12px;
	--md-sys-shape-corner-lg: 16px;
	--md-sys-shape-corner-xl: 28px;
	--md-sys-shape-corner-full: 9999px;

	/* Elevation (M3 uses tonal + soft shadow) */
	--md-sys-elevation-level0: none;
	--md-sys-elevation-level1: 0 1px 2px rgba(0, 0, 0, .15), 0 1px 3px 1px rgba(0, 0, 0, .08);
	--md-sys-elevation-level2: 0 1px 2px rgba(0, 0, 0, .15), 0 2px 6px 2px rgba(0, 0, 0, .10);
	--md-sys-elevation-level3: 0 4px 8px 3px rgba(0, 0, 0, .10), 0 1px 3px rgba(0, 0, 0, .15);
	--md-sys-elevation-level4: 0 6px 10px 4px rgba(0, 0, 0, .12), 0 2px 3px rgba(0, 0, 0, .15);
	--md-sys-elevation-level5: 0 8px 12px 6px rgba(0, 0, 0, .12), 0 4px 4px rgba(0, 0, 0, .15);

	/* Motion */
	--md-sys-motion-duration-short1: 50ms;
	--md-sys-motion-duration-short2: 100ms;
	--md-sys-motion-duration-medium1: 250ms;
	--md-sys-motion-duration-medium2: 300ms;
	--md-sys-motion-duration-long1: 450ms;
	--md-sys-motion-easing-standard: cubic-bezier(0.2, 0, 0, 1);
	--md-sys-motion-easing-emphasized: cubic-bezier(0.2, 0, 0, 1);
	--md-sys-motion-easing-emphasized-decelerate: cubic-bezier(0.05, 0.7, 0.1, 1);
	--md-sys-motion-easing-emphasized-accelerate: cubic-bezier(0.3, 0, 0.8, 0.15);

	/* State layer opacities */
	--md-sys-state-hover-opacity: 0.08;
	--md-sys-state-focus-opacity: 0.12;
	--md-sys-state-pressed-opacity: 0.12;

	font-family: var(--md-sys-typescale-body-font);
	color: var(--md-sys-color-on-surface);
	box-sizing: border-box;
}

.insta-feed *,
.insta-feed *::before,
.insta-feed *::after {
	box-sizing: inherit;
}

@media (prefers-color-scheme: dark) {
	.insta-feed[data-theme="auto"] {
		--md-sys-color-primary: #d0bcff;
		--md-sys-color-on-primary: #381e72;
		--md-sys-color-primary-container: #4f378b;
		--md-sys-color-on-primary-container: #eaddff;
		--md-sys-color-surface: #141218;
		--md-sys-color-on-surface: #e6e0e9;
		--md-sys-color-surface-variant: #49454f;
		--md-sys-color-on-surface-variant: #cac4d0;
		--md-sys-color-surface-container: #211f26;
		--md-sys-color-surface-container-high: #2b2930;
		--md-sys-color-outline: #938f99;
		--md-sys-color-outline-variant: #49454f;
	}
}

/* ============ MD components ============ */

.insta-feed .md-card {
	background: var(--md-sys-color-surface-container);
	color: var(--md-sys-color-on-surface);
	border-radius: var(--if-radius, var(--md-sys-shape-corner-lg));
	overflow: hidden;
	transition: box-shadow var(--md-sys-motion-duration-medium1) var(--md-sys-motion-easing-standard);
}

.insta-feed .md-card--filled {
	box-shadow: var(--md-sys-elevation-level0);
}

.insta-feed .md-card--elevated {
	box-shadow: var(--md-sys-elevation-level1);
}

/* ============ Feed grid ============ */

.insta-feed--grid .insta-feed__grid {
	list-style: none;
	margin: 0;
	padding: 0;
	display: grid;
	grid-template-columns: repeat(var(--if-columns, 3), minmax(0, 1fr));
	gap: var(--if-gap, 12px);
}

.insta-feed--masonry .insta-feed__masonry {
	column-count: var(--if-columns, 3);
	column-gap: var(--if-gap, 12px);
}

.insta-feed--masonry .insta-feed__item {
	break-inside: avoid;
	margin-bottom: var(--if-gap, 12px);
}

.insta-feed--scroll .insta-feed__scroll-wrap {
	position: relative;
	display: block;
	box-sizing: border-box;
}

.insta-feed--scroll .insta-feed__track {
	list-style: none !important;
	margin: 0 !important;
	padding: 0 !important;
	display: flex !important;
	flex-direction: row !important;
	flex-wrap: nowrap !important;
	gap: var(--if-gap, 12px);
	width: 100%;
	overflow-x: auto;
	overflow-y: hidden;
	scroll-snap-type: x mandatory;
	scrollbar-width: thin;
	scrollbar-color: var(--md-sys-color-outline-variant) transparent;
	box-sizing: border-box;
}

/* Hide the horizontal scrollbar — the carousel loops via JS, so a scrollbar
   would only confuse users who'd see it pin to one end. */
.insta-feed--scroll .insta-feed__track {
	scrollbar-width: none !important;
	-ms-overflow-style: none !important;
}
.insta-feed--scroll .insta-feed__track::-webkit-scrollbar { display: none !important; height: 0 !important; width: 0 !important; }

.insta-feed--scroll .insta-feed__item {
	flex: 0 0 calc((100% - (var(--if-columns, 3) - 1) * var(--if-gap, 12px)) / var(--if-columns, 3));
	min-width: 0;
	scroll-snap-align: start;
	list-style: none !important;
	margin: 0 !important;
	padding: 0 !important;
	display: block;
}

.insta-feed--scroll .insta-feed__nav {
	position: absolute !important;
	top: 50% !important;
	transform: translateY(-50%);
	z-index: 2;
	background: var(--md-sys-color-surface-container-high);
	color: var(--md-sys-color-on-surface);
	border: none;
	width: 40px;
	height: 40px;
	border-radius: var(--md-sys-shape-corner-full);
	display: inline-flex !important;
	align-items: center;
	justify-content: center;
	box-shadow: var(--md-sys-elevation-level2);
	cursor: pointer;
	transition: background var(--md-sys-motion-duration-short2) var(--md-sys-motion-easing-standard);
	margin: 0 !important;
	padding: 0 !important;
}

.insta-feed--scroll .insta-feed__nav:hover { background: var(--md-sys-color-secondary-container); color: var(--md-sys-color-on-secondary-container); }
.insta-feed--scroll .insta-feed__nav:focus-visible { outline: 3px solid var(--md-sys-color-primary); outline-offset: 2px; }
.insta-feed--scroll .insta-feed__nav svg { width: 24px; height: 24px; }
.insta-feed--scroll .insta-feed__nav--prev { left: -8px !important; right: auto !important; bottom: auto !important; }
.insta-feed--scroll .insta-feed__nav--next { right: -8px !important; left: auto !important; bottom: auto !important; }

.insta-feed__item {
	list-style: none;
	margin: 0;
	padding: 0;
}

/* ============ Card ============ */

.insta-feed .if-card {
	position: relative;
	background: var(--md-sys-color-surface-container);
	display: flex;
	flex-direction: column;
}

.insta-feed .if-card__media {
	position: relative;
	display: block;
	width: 100%;
	padding: 0;
	border: 0;
	background: var(--md-sys-color-surface-variant);
	cursor: pointer;
	aspect-ratio: 1 / 1;
	overflow: hidden;
}

.insta-feed--masonry .if-card__media {
	aspect-ratio: auto;
}

.insta-feed .if-card__img {
	display: block;
	width: 100%;
	height: 100%;
	object-fit: cover;
	object-position: center;
	position: relative;
	z-index: 1;
	transition: transform var(--md-sys-motion-duration-medium2) var(--md-sys-motion-easing-emphasized-decelerate);
}

.insta-feed--masonry .if-card__img {
	height: auto;
}

/* Image fit: contain — pillarbox/letterbox bars instead of cropping. */
.insta-feed[data-fit="contain"] .if-card__img {
	object-fit: contain;
}

/* Bar background: blurred enlarged copy of the same image. */
.insta-feed .if-card__bg {
	display: none;
}
.insta-feed[data-fit="contain"][data-bar-bg="blurred"] .if-card__bg {
	display: block;
	position: absolute;
	inset: 0;
	width: 100%;
	height: 100%;
	object-fit: cover;
	filter: blur(36px) saturate(1.4);
	transform: scale(1.15);
	z-index: 0;
	pointer-events: none;
}

.insta-feed .if-card__media:hover .if-card__img { transform: scale(1.04); }
.insta-feed[data-fit="contain"] .if-card__media:hover .if-card__img { transform: scale(1.02); }

.insta-feed .if-card__state-layer {
	position: absolute;
	inset: 0;
	background: currentColor;
	color: var(--md-sys-color-on-surface);
	opacity: 0;
	pointer-events: none;
	transition: opacity var(--md-sys-motion-duration-short2) var(--md-sys-motion-easing-standard);
}

.insta-feed .if-card__media:hover .if-card__state-layer { opacity: var(--md-sys-state-hover-opacity); }
.insta-feed .if-card__media:focus-visible .if-card__state-layer { opacity: var(--md-sys-state-focus-opacity); }
.insta-feed .if-card__media:active .if-card__state-layer { opacity: var(--md-sys-state-pressed-opacity); }
.insta-feed .if-card__media:focus-visible { outline: 3px solid var(--md-sys-color-primary); outline-offset: -3px; }

.insta-feed .if-card__badge {
	position: absolute;
	top: 8px;
	right: 8px;
	width: 28px;
	height: 28px;
	border-radius: var(--md-sys-shape-corner-full);
	background: rgba(0, 0, 0, 0.55);
	color: #fff;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	backdrop-filter: blur(8px);
	-webkit-backdrop-filter: blur(8px);
}

.insta-feed .if-card__badge svg { width: 16px; height: 16px; }

.insta-feed .if-card__body {
	padding: 12px 16px 16px;
}

.insta-feed .if-card__caption {
	margin: 0;
	font-size: 14px;
	line-height: 20px;
	color: var(--md-sys-color-on-surface);
	display: -webkit-box;
	-webkit-line-clamp: 3;
	-webkit-box-orient: vertical;
	overflow: hidden;
}

.insta-feed .if-card__date {
	margin: 6px 0 0;
	font-size: 11px;
	letter-spacing: 0.5px;
	text-transform: uppercase;
	color: var(--md-sys-color-on-surface-variant);
}

/* ============ Lightbox ============ */

.if-lightbox {
	width: min(96vw, 1100px);
	max-height: 92vh;
	padding: 0;
	border: 0;
	background: transparent;
	color: var(--md-sys-color-on-surface);
}

.if-lightbox::backdrop {
	background: rgba(0, 0, 0, 0.65);
}

.if-lightbox__scrim {
	position: fixed;
	inset: 0;
	background: transparent;
	cursor: zoom-out;
}

.if-lightbox__panel {
	position: relative;
	display: grid;
	grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.8fr);
	background: var(--md-sys-color-surface-container);
	color: var(--md-sys-color-on-surface);
	border-radius: var(--md-sys-shape-corner-xl);
	overflow: hidden;
	box-shadow: var(--md-sys-elevation-level5);
	max-height: 92vh;
}

@media (max-width: 720px) {
	.if-lightbox__panel {
		grid-template-columns: 1fr;
		grid-template-rows: minmax(0, 1fr) auto;
	}
}

.if-lightbox__media {
	background: #000;
	display: flex;
	align-items: center;
	justify-content: center;
	min-height: 240px;
	max-height: 92vh;
	position: relative;
}

.if-lightbox__media img,
.if-lightbox__media video {
	display: block;
	width: 100%;
	height: 100%;
	max-height: 92vh;
	object-fit: contain;
}

.if-lightbox__media .if-lightbox__album-nav {
	position: absolute;
	top: 50%;
	transform: translateY(-50%);
	width: 44px;
	height: 44px;
	border-radius: 9999px;
	background: rgba(0, 0, 0, 0.4);
	color: #fff;
	border: 0;
	cursor: pointer;
	display: inline-flex;
	align-items: center;
	justify-content: center;
}

.if-lightbox__media .if-lightbox__album-nav--prev { left: 8px; }
.if-lightbox__media .if-lightbox__album-nav--next { right: 8px; }
.if-lightbox__media .if-lightbox__album-nav svg { width: 20px; height: 20px; }

.if-lightbox__media .if-lightbox__dots {
	position: absolute;
	bottom: 12px;
	left: 50%;
	transform: translateX(-50%);
	display: flex;
	gap: 6px;
}

.if-lightbox__media .if-lightbox__dot {
	width: 6px;
	height: 6px;
	border-radius: 9999px;
	background: rgba(255, 255, 255, 0.5);
}

.if-lightbox__media .if-lightbox__dot.is-active { background: #fff; }

.if-lightbox__aside {
	display: flex;
	flex-direction: column;
	padding: 20px;
	gap: 12px;
	overflow-y: auto;
}

.if-lightbox__header {
	display: flex;
	flex-direction: column;
	gap: 4px;
}

.if-lightbox__handle {
	font-weight: 500;
	font-size: 16px;
	color: var(--md-sys-color-on-surface);
}

.if-lightbox__date {
	font-size: 11px;
	letter-spacing: 0.5px;
	text-transform: uppercase;
	color: var(--md-sys-color-on-surface-variant);
}

.if-lightbox__caption {
	font-size: 14px;
	line-height: 22px;
	color: var(--md-sys-color-on-surface);
	white-space: pre-wrap;
}

.if-lightbox__footer {
	margin-top: auto;
	padding-top: 8px;
	border-top: 1px solid var(--md-sys-color-outline-variant);
}

.if-lightbox__close {
	position: absolute;
	top: 8px;
	right: 8px;
	z-index: 2;
	background: var(--md-sys-color-surface-container-high);
}

/* ============ Buttons / icon buttons ============ */

.insta-feed .md-btn,
.if-lightbox .md-btn {
	display: inline-flex;
	align-items: center;
	gap: 8px;
	padding: 10px 24px;
	border-radius: 9999px;
	border: 0;
	cursor: pointer;
	font-family: inherit;
	font-size: 14px;
	font-weight: 500;
	letter-spacing: 0.1px;
	transition: background var(--md-sys-motion-duration-short2) var(--md-sys-motion-easing-standard),
		box-shadow var(--md-sys-motion-duration-short2) var(--md-sys-motion-easing-standard);
	text-decoration: none;
}

.insta-feed .md-btn--filled,
.if-lightbox .md-btn--filled {
	background: var(--md-sys-color-primary);
	color: var(--md-sys-color-on-primary);
}

.insta-feed .md-btn--tonal,
.if-lightbox .md-btn--tonal {
	background: var(--md-sys-color-secondary-container);
	color: var(--md-sys-color-on-secondary-container);
}

.insta-feed .md-btn:hover,
.if-lightbox .md-btn:hover {
	box-shadow: var(--md-sys-elevation-level1);
}

.insta-feed .md-icon-btn,
.if-lightbox .md-icon-btn {
	width: 40px;
	height: 40px;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	border-radius: 9999px;
	border: 0;
	cursor: pointer;
	background: transparent;
	color: var(--md-sys-color-on-surface);
	transition: background var(--md-sys-motion-duration-short2) var(--md-sys-motion-easing-standard);
}

.if-lightbox .md-icon-btn { color: var(--md-sys-color-on-surface); }
.if-lightbox .md-icon-btn:hover { background: var(--md-sys-color-surface-container-highest, var(--md-sys-color-surface-container-high)); }
.if-lightbox .md-icon-btn svg { width: 24px; height: 24px; }

/* ============ Empty state ============ */

.insta-feed--empty {
	padding: 24px;
	background: var(--md-sys-color-surface-container, #f3edf7);
	color: var(--md-sys-color-on-surface-variant, #49454f);
	border-radius: 16px;
	text-align: center;
	font-family: 'Roboto', system-ui, sans-serif;
	font-size: 14px;
}

@media (prefers-reduced-motion: reduce) {
	.insta-feed *, .if-lightbox * {
		animation-duration: 0.01ms !important;
		transition-duration: 0.01ms !important;
	}
}