/*
 * TOP once-only scroll motion.
 * The observing class is added only after JS has registered every target, so
 * disabled or failed JavaScript always leaves the complete page visible.
 */
html.sect-motion-observing .sect-top [data-sect-reveal] {
	--sect-reveal-duration: 560ms;
	--sect-reveal-delay: calc(var(--sect-reveal-order, 0) * 58ms);
	--sect-reveal-ease: cubic-bezier(.22, 1, .36, 1);
	backface-visibility: hidden;
	transition-delay: var(--sect-reveal-delay);
	transition-duration: var(--sect-reveal-duration);
	transition-timing-function: var(--sect-reveal-ease);
	will-change: opacity, transform, clip-path;
}

/* Heading glyphs overhang their line boxes, so never clip the text leaf itself. */
html.sect-motion-observing .sect-top [data-sect-reveal="heading"] {
	opacity: 0;
	clip-path: none;
	transform: translate3d(-8px, 0, 0);
	transition-property: opacity, transform;
	--sect-reveal-duration: 620ms;
}

/* Photography and illustration open horizontally like the site's cut-paper fields. */
html.sect-motion-observing .sect-top [data-sect-reveal="media"] {
	opacity: .01;
	clip-path: inset(0 0 0 100%);
	transform: scale(1.018);
	transform-origin: 50% 50%;
	transition-property: opacity, clip-path, transform;
	--sect-reveal-duration: 700ms;
}

/* Yellow/black panels open from the opposite edge to create a restrained rhythm. */
html.sect-motion-observing .sect-top [data-sect-reveal="accent"] {
	opacity: 1;
	clip-path: inset(0 100% 0 0);
	transition-property: clip-path;
	--sect-reveal-duration: 660ms;
}

/* Cards use a short group stagger; distance stays deliberately small. */
html.sect-motion-observing .sect-top [data-sect-reveal="card"] {
	opacity: 0;
	transform: translate3d(0, 18px, 0) scale(.994);
	transition-property: opacity, transform;
	--sect-reveal-duration: 580ms;
}

/* Body copy is quieter than titles and cards. */
html.sect-motion-observing .sect-top [data-sect-reveal="copy"] {
	opacity: 0;
	transform: translate3d(0, 7px, 0);
	transition-property: opacity, transform;
	--sect-reveal-duration: 460ms;
}

/* The interactive horizontal rail stays fully visible and operable before firing. */
html.sect-motion-observing .sect-top [data-sect-reveal="rail"] {
	opacity: 1;
	transform: translate3d(10px, 0, 0);
	transition-property: transform;
	--sect-reveal-duration: 420ms;
}

html.sect-motion-observing .sect-top [data-sect-reveal].is-revealed,
html.sect-motion-observing .sect-top [data-sect-reveal]:focus,
html.sect-motion-observing .sect-top [data-sect-reveal]:focus-within {
	opacity: 1;
	transform: none;
	will-change: auto;
}

html.sect-motion-observing .sect-top [data-sect-reveal="media"].is-revealed,
html.sect-motion-observing .sect-top [data-sect-reveal="accent"].is-revealed {
	clip-path: inset(0);
}

/* Focus visibility is immediate; keyboard users never wait through a reveal. */
html.sect-motion-observing .sect-top [data-sect-reveal]:focus,
html.sect-motion-observing .sect-top [data-sect-reveal]:focus-within {
	clip-path: none;
	transition-delay: 0ms;
	transition-duration: 0ms;
}

@media (max-width: 767px) {
	html.sect-motion-observing .sect-top [data-sect-reveal] {
		--sect-reveal-delay: calc(var(--sect-reveal-order, 0) * 48ms);
	}
	html.sect-motion-observing .sect-top [data-sect-reveal="heading"] {
		--sect-reveal-duration: 540ms;
		transform: translate3d(-6px, 0, 0);
	}
	html.sect-motion-observing .sect-top [data-sect-reveal="card"] {
		--sect-reveal-duration: 520ms;
		transform: translate3d(0, 13px, 0) scale(.996);
	}
	html.sect-motion-observing .sect-top [data-sect-reveal="copy"] {
		--sect-reveal-duration: 420ms;
		transform: translate3d(0, 5px, 0);
	}
	html.sect-motion-observing .sect-top [data-sect-reveal="media"] {
		--sect-reveal-duration: 620ms;
		transform: scale(1.012);
	}
}

@media (prefers-reduced-motion: reduce) {
	html .sect-top [data-sect-reveal] {
		opacity: 1 !important;
		clip-path: none !important;
		transform: none !important;
		transition: none !important;
		will-change: auto !important;
	}
}