/**
 * Sabine Andrey - Progetti Intro
 *
 * Struttura DOM:
 *   .sa-intro-stage > .sa-intro-bg + .sa-intro-card * N
 *
 * Background gestito da .sa-intro-bg (opacity propria, scollegata dalle card).
 * Le 2 card rimaste visibili al match finale fanno fade-out tramite
 * .sa-intro-stage.is-final-out > .sa-intro-card.
 */

.sa-intro-anchor {
	position: relative;
	height: 1px;
	margin: 0;
	pointer-events: none;
}

.sa-intro-spacer {
	position: relative;
	height: 150vh;
	margin: 0;
	pointer-events: none;
}

.sa-intro-stage {
	position: fixed;
	top: 0;
	left: 0;
	width: 100vw;
	height: 100vh;
	overflow: hidden;
	background: transparent;
	z-index: 9999;
	pointer-events: none;
	will-change: opacity;
}

.sa-intro-stage.is-pre-anim {
	opacity: 0;
	visibility: hidden;
}

.sa-intro-stage.is-finished {
	display: none;
}

.sa-intro-bg {
	position: absolute;
	inset: 0;
	background: var( --wp--preset--color--base, #dbd7ce );
	will-change: opacity;
}

.sa-intro-card {
	position: absolute;
	top: 50%;
	left: 50%;
	width: 20vw;
	aspect-ratio: 1 / 1;
	background-size: cover;
	background-position: center;
	background-repeat: no-repeat;
	transform: translate( -50%, -50% );
	opacity: 1;
	will-change: transform;
}

/* Match finale: le card svaniscono istantaneamente (no transition) cosi'
   l'opacita' "visibile" appena prima della scomparsa resta 1, identica a
   quella delle img nella griglia sottostante -> nessun salto percepibile. */
.sa-intro-stage.is-final-out .sa-intro-card {
	opacity: 0;
}

/* Intro attiva: blocca scroll-x. */
body.sa-intro-active {
	overflow-x: clip;
}

body.sa-intro-active > .wp-site-blocks > header.wp-block-template-part {
	position: relative;
	z-index: 1;
}

/* Reduced motion: skippa l'intro completamente */
@media ( prefers-reduced-motion: reduce ) {
	.sa-intro-anchor,
	.sa-intro-spacer,
	.sa-intro-stage {
		display: none;
	}
}

/* Mobile (<= 768px): intro disabilitata. Fallback se anchor/spacer/stage
   risultassero comunque nel DOM (es. resize a runtime da desktop a mobile). */
@media ( max-width: 768px ) {
	.sa-intro-anchor,
	.sa-intro-spacer,
	.sa-intro-stage {
		display: none;
	}

	body.sa-intro-active {
		overflow-x: visible;
	}
}