/**
 * Loading Animations
 * Preloader, Skeleton, and Content Reveal
 *
 * Golden rules: < 2s duration, lightweight (CSS/SVG), no heavy JS.
 * Distinct from Fertidonors/Ferticlinic - organic pulse + staggered reveals.
 *
 * @package Mente_Reproductiva
 */

/* =============================================
   Z-index for preloader (above all content)
   ============================================= */
:root {
	--z-index-preloader: 9999;
	--loading-duration: 1.2s;
	--reveal-duration: 0.6s;
	--skeleton-duration: 1.5s;
}

/* Prevent scroll while preloader is visible */
body.mr-preloader-active {
	overflow: hidden;
}

/* =============================================
   Page Preloader - Full-screen overlay
   Organic pulse animation (distinct from circular spinners)
   ============================================= */
.mr-preloader {
	position: fixed;
	inset: 0;
	z-index: var(--z-index-preloader);
	display: flex;
	align-items: center;
	justify-content: center;
	background-color: var(--color-bg-light, #f2efe8);
	transition: opacity 0.4s ease, visibility 0.4s ease;
	will-change: opacity;
}

.mr-preloader--hidden {
	opacity: 0;
	visibility: hidden;
	pointer-events: none;
}

/* Preloader content - centered */
.mr-preloader__inner {
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: var(--spacing-md, 1.5rem);
}

/* Organic leaf-inspired shape (SVG-like via CSS) - unique to MR */
.mr-preloader__spinner {
	width: 48px;
	height: 48px;
	position: relative;
}

.mr-preloader__spinner::before,
.mr-preloader__spinner::after {
	content: '';
	position: absolute;
	inset: 0;
	border-radius: 50%;
	border: 3px solid transparent;
	border-top-color: var(--color-primary-dark-green, #274e2d);
	animation: mr-preloader-spin var(--loading-duration) ease-in-out infinite;
}

.mr-preloader__spinner::after {
	border-top-color: var(--color-accent-peach, #E8C4B8);
	animation-delay: -0.6s;
	inset: 8px;
}

@keyframes mr-preloader-spin {
	0% {
		transform: rotate(0deg);
	}
	100% {
		transform: rotate(360deg);
	}
}

/* Optional subtle brand text */
.mr-preloader__text {
	font-family: var(--font-sans, 'Montserrat', sans-serif);
	font-size: 0.75rem;
	font-weight: 500;
	letter-spacing: 0.1em;
	text-transform: uppercase;
	color: var(--color-text-medium, #47423D);
	opacity: 0.7;
	animation: mr-preloader-pulse 1.2s ease-in-out infinite;
}

@keyframes mr-preloader-pulse {
	0%, 100% {
		opacity: 0.5;
	}
	50% {
		opacity: 0.9;
	}
}

/* Respect reduced motion preference */
@media (prefers-reduced-motion: reduce) {
	.mr-preloader__spinner::before,
	.mr-preloader__spinner::after {
		animation: none;
		opacity: 0.6;
	}
	.mr-preloader__text {
		animation: none;
	}
}

/* =============================================
   Skeleton Loading - Shimmer effect
   For cards, images, text placeholders
   ============================================= */
.mr-skeleton {
	background: linear-gradient(
		90deg,
		var(--color-primary-beige-alt, #F5F3ED) 0%,
		var(--color-primary-sage-soft, #DDE6DF) 50%,
		var(--color-primary-beige-alt, #F5F3ED) 100%
	);
	background-size: 200% 100%;
	animation: mr-skeleton-shimmer var(--skeleton-duration) ease-in-out infinite;
	border-radius: var(--border-radius-sm, 4px);
}

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

/* Skeleton variants */
.mr-skeleton--image {
	aspect-ratio: 4 / 3;
	width: 100%;
}

.mr-skeleton--text {
	height: 1em;
	min-height: 16px;
}

.mr-skeleton--text-sm {
	height: 0.875em;
	min-height: 14px;
}

.mr-skeleton--title {
	height: 1.5em;
	min-height: 24px;
	width: 80%;
}

.mr-skeleton--button {
	height: 44px;
	width: 120px;
}

/* Skeleton card layout */
.mr-skeleton-card {
	display: flex;
	flex-direction: column;
	gap: var(--spacing-sm, 1rem);
}

.mr-skeleton-card .mr-skeleton--image {
	flex-shrink: 0;
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
	.mr-skeleton {
		animation: none;
		background: var(--color-primary-beige-alt, #F5F3ED);
	}
}

/* =============================================
   Content Reveal - Fade-in + Slide-up on scroll
   Uses Intersection Observer (loading.js)
   ============================================= */
.mr-reveal {
	opacity: 0;
	transform: translateY(24px);
	transition: opacity var(--reveal-duration) ease-out,
	            transform var(--reveal-duration) ease-out;
	will-change: opacity, transform;
}

.mr-reveal--visible {
	opacity: 1;
	transform: translateY(0);
}

/* Stagger children for grid/carousel items */
.mr-reveal-stagger > * {
	opacity: 0;
	transform: translateY(20px);
	transition: opacity var(--reveal-duration) ease-out,
	            transform var(--reveal-duration) ease-out;
}

.mr-reveal-stagger.mr-reveal--visible > *:nth-child(1) { transition-delay: 0.05s; }
.mr-reveal-stagger.mr-reveal--visible > *:nth-child(2) { transition-delay: 0.1s; }
.mr-reveal-stagger.mr-reveal--visible > *:nth-child(3) { transition-delay: 0.15s; }
.mr-reveal-stagger.mr-reveal--visible > *:nth-child(4) { transition-delay: 0.2s; }
.mr-reveal-stagger.mr-reveal--visible > *:nth-child(5) { transition-delay: 0.25s; }
.mr-reveal-stagger.mr-reveal--visible > *:nth-child(6) { transition-delay: 0.3s; }
.mr-reveal-stagger.mr-reveal--visible > *:nth-child(7) { transition-delay: 0.35s; }
.mr-reveal-stagger.mr-reveal--visible > *:nth-child(8) { transition-delay: 0.4s; }
.mr-reveal-stagger.mr-reveal--visible > *:nth-child(9) { transition-delay: 0.45s; }
.mr-reveal-stagger.mr-reveal--visible > *:nth-child(n+10) { transition-delay: 0.5s; }

.mr-reveal-stagger.mr-reveal--visible > * {
	opacity: 1;
	transform: translateY(0);
}

/* =============================================
   Hero Banner - Directional reveal (this section only)
   Text: from right when on right, from left when on left
   Image: from below
   ============================================= */
.mr-hero-reveal {
	opacity: 1;
}

.mr-hero-reveal .hero-layout .column-image {
	opacity: 0;
	transform: translateY(40px);
	transition: opacity var(--reveal-duration) ease-out,
	            transform var(--reveal-duration) ease-out;
}

.mr-hero-reveal .hero-layout .column-content {
	opacity: 0;
	transform: translateX(30px);
	transition: opacity var(--reveal-duration) ease-out,
	            transform var(--reveal-duration) ease-out;
	transition-delay: 0.1s;
}

/* Text on left (image-right layout): content slides from left */
.mr-hero-reveal .hero-layout.image-right .column-content {
	transform: translateX(-30px);
}

.mr-hero-reveal.mr-reveal--visible .hero-layout .column-image {
	opacity: 1;
	transform: translateY(0);
}

.mr-hero-reveal.mr-reveal--visible .hero-layout .column-content {
	opacity: 1;
	transform: translateX(0);
}

/* =============================================
   Two Column Image + Text - Directional reveal (scroll-triggered)
   Image: from below | Text: from right when text-right, from left when text-left
   ============================================= */
.mr-two-column-reveal {
	opacity: 1;
}

.mr-two-column-reveal .two-column-layout .column-image {
	opacity: 0;
	transform: translateY(40px);
	transition: opacity var(--reveal-duration) ease-out,
	            transform var(--reveal-duration) ease-out;
}

.mr-two-column-reveal .two-column-layout .column-content {
	opacity: 0;
	transform: translateX(30px);
	transition: opacity var(--reveal-duration) ease-out,
	            transform var(--reveal-duration) ease-out;
	transition-delay: 0.1s;
}

/* Text on left (image-right layout): content slides from left */
.mr-two-column-reveal .two-column-layout.image-right .column-content {
	transform: translateX(-30px);
}

.mr-two-column-reveal.mr-reveal--visible .two-column-layout .column-image {
	opacity: 1;
	transform: translateY(0);
}

.mr-two-column-reveal.mr-reveal--visible .two-column-layout .column-content {
	opacity: 1;
	transform: translateX(0);
}

/* =============================================
   Video Banner - Title/Subtitle slide from above
   Triggers when preloader finishes (same as hero)
   ============================================= */
.mr-vb-banner-reveal .mr-vb-banner-title,
.mr-vb-banner-reveal .mr-vb-banner-subtitle {
	opacity: 0;
	transform: translateY(-30px);
	transition: opacity var(--reveal-duration) ease-out,
	            transform var(--reveal-duration) ease-out;
}

.mr-vb-banner-reveal .mr-vb-banner-subtitle {
	transition-delay: 0.1s;
}

.mr-vb-banner-reveal.mr-reveal--visible .mr-vb-banner-title,
.mr-vb-banner-reveal.mr-reveal--visible .mr-vb-banner-subtitle {
	opacity: 1;
	transform: translateY(0);
}

/* Image loading placeholder - show skeleton until loaded */
.mr-img-loading {
	position: relative;
	overflow: hidden;
	background-color: var(--color-primary-beige-alt, #F5F3ED);
}

.mr-img-loading::before {
	content: '';
	position: absolute;
	inset: 0;
	background: linear-gradient(
		90deg,
		var(--color-primary-beige-alt, #F5F3ED) 0%,
		var(--color-primary-sage-soft, #DDE6DF) 50%,
		var(--color-primary-beige-alt, #F5F3ED) 100%
	);
	background-size: 200% 100%;
	animation: mr-skeleton-shimmer var(--skeleton-duration) ease-in-out infinite;
	z-index: 0;
}

/* Do NOT override position - preserves blog-card aspect-ratio (img must stay position: absolute) */
.mr-img-loading img {
	z-index: 1;
	opacity: 0;
	transition: opacity 0.4s ease;
}

.mr-img-loading.mr-img-loaded img {
	opacity: 1;
}

.mr-img-loading.mr-img-loaded::before {
	display: none;
}

/* =============================================
   Logo unroll animation - desktop only
   Triggers when preloader finishes
   ============================================= */
@media (min-width: 768px) {
	.site-branding.mr-logo-unroll .site-logo-xl,
	.site-branding.mr-logo-unroll .custom-logo-link img {
		animation: mr-logo-unroll 0.6s ease-out forwards;
		transform-origin: left center;
	}

	@keyframes mr-logo-unroll {
		0% {
			opacity: 0;
			transform: scaleX(0);
		}
		100% {
			opacity: 1;
			transform: scaleX(1);
		}
	}
}

@media (prefers-reduced-motion: reduce) {
	.site-branding.mr-logo-unroll .site-logo-xl,
	.site-branding.mr-logo-unroll .custom-logo-link img {
		animation: none;
		opacity: 1;
		transform: none;
	}
}

/* Respect reduced motion for reveals */
@media (prefers-reduced-motion: reduce) {
	.mr-reveal,
	.mr-reveal-stagger > * {
		opacity: 1;
		transform: none;
		transition: none;
	}
	.mr-reveal-stagger.mr-reveal--visible > * {
		opacity: 1;
		transform: none;
		transition-delay: 0;
	}
	.mr-hero-reveal .hero-layout .column-image,
	.mr-hero-reveal .hero-layout .column-content {
		opacity: 1;
		transform: none;
		transition: none;
	}
	.mr-two-column-reveal .two-column-layout .column-image,
	.mr-two-column-reveal .two-column-layout .column-content {
		opacity: 1;
		transform: none;
		transition: none;
	}
	.mr-vb-banner-reveal .mr-vb-banner-title,
	.mr-vb-banner-reveal .mr-vb-banner-subtitle {
		opacity: 1;
		transform: none;
		transition: none;
	}
}