/* ==========================================================================
   Alqima Urban — Selected Projects (homepage section, Stage 05)
   Off-white editorial surface · large frames · asymmetric rhythm.
   Base = native horizontal strip with scroll-snap (no JS, touch, reduced
   motion). .is-pinned (projects.js, desktop + motion) = pinned stage with
   scroll-scrubbed horizontal travel.
   ========================================================================== */

.prj {
	position: relative;
	z-index: 1;
	padding-block: clamp(2rem, 5vw, 4rem) var(--s-section);
	overflow: clip;
}

/* ------------------------------------------------------------- Intro */
.prj__intro {
	display: grid;
	grid-template-columns: repeat(var(--grid-cols), minmax(0, 1fr));
	column-gap: var(--gutter);
	row-gap: var(--s-6);
	margin-block-start: clamp(3rem, 8vw, 8rem);
	align-items: end;
}

.prj__title {
	grid-column: 1 / -1;
	max-width: 14ch;
	font-size: clamp(2.5rem, 1.2rem + 5.6vw, 7rem);
	font-weight: var(--fw-semibold);
	letter-spacing: -0.05em;
	line-height: 0.96;
}

.prj__title .w {
	display: inline-block;
	overflow: hidden;
	vertical-align: top;
	padding-block: 0.06em 0.12em;
	margin-block: -0.06em -0.12em;
}

.prj__title .w > span {
	display: inline-block;
	will-change: transform;
}

.prj__aside {
	grid-column: 1 / -1;
}

.prj__lead {
	max-width: 38ch;
	font-size: var(--fs-lead);
	line-height: 1.5;
	color: var(--c-text-2);
}

.prj__cta {
	margin-block-start: var(--s-5);
}

/* ----------------------------------------------------------- Filters */
/* Editorial, not a dashboard: a single hairline row of words. Selected
   state = navy text + burgundy marker and underline. */
.prj__filters {
	display: flex;
	flex-wrap: wrap;
	gap: 0.25rem clamp(1.25rem, 2.4vw, 2.25rem);
	margin-block-start: clamp(3rem, 6vw, 5.5rem);
	padding-block-start: var(--s-4);
	border-block-start: 1px solid var(--c-hairline);
}

html:not(.js) .prj__filters {
	display: none; /* filtering needs JS; every project stays visible */
}

.prj__filter {
	position: relative;
	display: inline-flex;
	align-items: baseline;
	gap: 0.4rem;
	min-height: 2.75rem;
	padding-inline: 0;
	font-size: 0.75rem;
	font-weight: var(--fw-medium);
	letter-spacing: var(--tr-label);
	text-transform: uppercase;
	color: var(--c-text-3);
	transition: color var(--dur-2) var(--ease-soft);
}

.prj__filter-label {
	position: relative;
	padding-block: 0.875rem 0.375rem;
}

.prj__filter-label::after {
	content: "";
	position: absolute;
	inset-inline: 0;
	inset-block-end: 0;
	height: 1px;
	background: var(--color-burgundy);
	transform: scaleX(0);
	transform-origin: left center;
	transition: transform var(--dur-4) var(--ease-out);
}

[dir="rtl"] .prj__filter-label::after {
	transform-origin: right center;
}

.prj__filter-count {
	font-family: var(--f-latin);
	font-size: var(--fs-micro);
	letter-spacing: 0.08em;
	color: var(--c-text-3);
}

.prj__filter[aria-pressed="true"] {
	color: var(--c-text);
}

.prj__filter[aria-pressed="true"] .prj__filter-label::after {
	transform: scaleX(1);
}

.prj__filter[aria-pressed="true"] .prj__filter-count {
	color: var(--color-burgundy);
}

@media (hover: hover) {
	.prj__filter:hover {
		color: var(--c-text);
	}
}

/* ------------------------------------------------------------- Stage */
.prj__stage {
	position: relative;
	margin-block-start: clamp(2.5rem, 5vw, 4.5rem);
}

.prj__viewport {
	overflow-x: auto;
	overflow-y: hidden;
	overscroll-behavior-x: contain;
	scroll-snap-type: x mandatory;
	scroll-padding-inline: var(--margin);
	scrollbar-width: none;
	-webkit-overflow-scrolling: touch;
}

.prj__viewport::-webkit-scrollbar {
	display: none;
}

.prj__viewport:focus {
	outline: none;
}

/* .prj scope: outranks the base `ol[class] { padding: 0 }` reset. */
.prj .prj__track {
	display: flex;
	align-items: flex-start;
	gap: clamp(1.25rem, 4vw, 5.5rem);
	width: max-content;
	margin: 0;
	padding: 0 var(--margin) var(--s-4);
	list-style: none;
}

/* -------------------------------------------------------------- Items */
.prj-item {
	--prj-w: 82vw;
	flex: none;
	width: var(--prj-w);
	scroll-snap-align: start;
}

.prj-item[hidden] {
	display: none;
}

.prj-item__link {
	display: block;
	color: inherit;
}

.prj-item__media {
	margin: 0;
}

.prj-item__clip {
	position: relative;
	aspect-ratio: 4 / 5;
	overflow: hidden;
	background: var(--c-surface-1);
}

.prj-item__img {
	position: absolute;
	inset: 0 -6%;
	will-change: transform;
}

.prj-item__pic,
.prj-item__img picture {
	display: block;
	width: 100%;
	height: 100%;
	object-fit: cover;
	transform: translate3d(var(--mx, 0px), var(--my, 0px), 0) scale(var(--s, 1));
	transition: transform 1.2s var(--ease-out);
}

.prj-item__body {
	display: grid;
	grid-template-columns: auto minmax(0, 1fr) auto;
	align-items: start;
	gap: var(--s-4);
	padding-block-start: var(--s-5);
}

.prj-item__index {
	min-width: 1.75rem;
	padding-block-start: 0.55em;
	font-family: var(--f-latin);
	font-size: var(--fs-micro);
	font-weight: var(--fw-medium);
	letter-spacing: 0.14em;
	color: var(--c-text-3);
}

.prj-item__title {
	font-size: clamp(1.375rem, 1rem + 1.25vw, 2.375rem);
	font-weight: var(--fw-medium);
	letter-spacing: -0.03em;
	line-height: 1.12;
	max-width: 20ch;
	transition: transform 0.9s var(--ease-out);
}

.prj-item__meta {
	display: flex;
	flex-wrap: wrap;
	margin-block-start: var(--s-3);
	font-size: var(--fs-label);
	font-weight: var(--fw-medium);
	letter-spacing: 0.14em;
	text-transform: uppercase;
	color: var(--c-text-3);
}

.prj-item__meta span + span::before {
	content: "·";
	margin-inline: 0.6em;
	color: var(--c-hairline-strong);
}

.prj-item__arrow {
	display: grid;
	place-items: center;
	width: 2.75rem;
	height: 2.75rem;
	border: 1px solid var(--c-hairline-strong);
	border-radius: 50%;
	font-size: 0.875rem;
	color: var(--c-text);
	transition: transform 0.8s var(--ease-out), border-color var(--dur-3) var(--ease-soft), background-color var(--dur-3) var(--ease-soft), color var(--dur-3) var(--ease-soft);
}

.prj-item__link:focus-visible {
	outline-offset: 8px;
}

/* Hover (fine pointer): image 1 → 1.05, title nudges, arrow travels and
   takes the burgundy accent. Cursor parallax adds ±10px (--mx / --my). */
@media (hover: hover) and (pointer: fine) {
	a.prj-item__link:hover {
		--s: 1.05;
	}

	a.prj-item__link:hover .prj-item__title {
		transform: translateX(6px);
	}

	[dir="rtl"] a.prj-item__link:hover .prj-item__title {
		transform: translateX(-6px);
	}

	a.prj-item__link:hover .prj-item__arrow {
		background: var(--color-burgundy);   /* arrow movement: interactions.css */
		border-color: var(--color-burgundy);
		color: var(--color-off-white);
	}
}

/* ----------------------------------------------------------- Progress */
.prj__progress {
	display: flex;
	align-items: center;
	gap: var(--s-5);
	margin-block-start: clamp(1.5rem, 3vw, 3rem);
}

.prj__counter {
	font-family: var(--f-latin);
	font-size: var(--fs-micro);
	font-weight: var(--fw-medium);
	letter-spacing: 0.16em;
	font-variant-numeric: tabular-nums;
	color: var(--c-text-3);
	white-space: nowrap;
}

.prj__counter [data-prj-current] {
	color: var(--c-text);
}

.prj__bar {
	position: relative;
	flex: 1;
	height: 1px;
	background: var(--c-hairline);
	overflow: hidden;
}

.prj__bar-fill {
	position: absolute;
	inset: 0;
	background: var(--color-burgundy);
	transform: scaleX(var(--p, 0));
	transform-origin: left center;
}

[dir="rtl"] .prj__bar-fill {
	transform-origin: right center;
}

/* ============================================================== Tablet */
@media (min-width: 48em) {
	.prj-item {
		--prj-w: 56vw;
	}

	.prj-item--tall {
		--prj-w: 40vw;
	}

	.prj__title {
		grid-column: 1 / span 6;
	}

	.prj__aside {
		grid-column: 1 / span 6;
	}
}

/* ============================================================= Desktop */
/* Frame size follows the viewport height so a whole frame + its caption
   always fits the pinned stage. Wide = 16:10, tall = 4:5, tall frames sit
   lower (asymmetric editorial rhythm). */
@media (min-width: 64em) {
	.prj {
		--prj-h: min(56svh, 34vw);
	}

	.prj__title {
		grid-column: 1 / span 8;
	}

	.prj__aside {
		grid-column: 9 / span 4;
		padding-block-end: 0.5em;
	}

	.prj-item--wide {
		--prj-w: calc(var(--prj-h) * 1.6);   /* 16:10 */
	}

	.prj-item--tall {
		--prj-w: calc(var(--prj-h) * 0.8);   /* 4:5 */
		margin-block-start: clamp(2.5rem, 9svh, 6rem);
	}

	.prj-item__clip {
		aspect-ratio: auto;
		height: var(--prj-h);
	}
}

/* -------------------------------------------- Pinned (projects.js only) */
.prj.is-pinned .prj__viewport {
	overflow: hidden;
	scroll-snap-type: none;
}

.prj.is-pinned .prj__stage {
	display: flex;
	flex-direction: column;
	justify-content: center;
	min-height: 100svh;
	margin-block-start: 0;
	padding-block: calc(var(--header-h) + var(--s-4)) var(--s-6);
}

.prj.is-pinned .prj__track {
	will-change: transform;
}

/* ======================================= Spatial interaction (Stage 07) */
/* Pinned travel: the track leans with the scroll velocity (skewX written by
   projects.js on the already-composited track; ≤ 2°, settles to 0). */
.prj.is-pinned .prj__track {
	transform-origin: 50% 100%;
}

/* Fine pointer: the frame tilts toward the cursor (--rx / --ry) while the
   metadata line drifts the other way — image behind, text in front. */
@media (hover: hover) and (pointer: fine) {
	.prj-item__media {
		transform: perspective(1200px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg));
		transition: transform 1.1s var(--ease-out);
	}

	.prj-item__meta {
		translate: calc(var(--mx, 0px) * -0.35) 0;
		transition: translate 1.1s var(--ease-out);
	}
}

/* ================================================== Pre-reveal states */
@media (prefers-reduced-motion: no-preference) {
	html.js [data-prj] [data-prj-reveal]:not(.is-in) {
		opacity: 0;
		transform: translateY(var(--reveal-y));
	}

	html.js [data-prj] [data-prj-reveal] {
		transition: opacity var(--reveal-fade) var(--ease-soft), transform var(--reveal-move) var(--ease-out);
		transition-delay: calc(var(--d, 0) * var(--reveal-stagger));
	}
}

@media (prefers-reduced-motion: reduce) {
	.prj-item__pic,
	.prj-item__img picture,
	.prj-item__title,
	.prj-item__arrow,
	.prj-item__media,
	.prj-item__clip {
		transition: none;
		transform: none;
	}

	.prj-item__meta {
		translate: none;
	}
}

/* ================================================================ Arabic */
[dir="rtl"] .prj__title {
	letter-spacing: 0;
	line-height: 1.28;
	font-size: clamp(2.25rem, 1.1rem + 4.6vw, 6rem);
}

[dir="rtl"] .prj__title .w {
	padding-block: 0.12em 0.18em;
	margin-block: -0.12em -0.18em;
}

[dir="rtl"] .prj__lead {
	line-height: 1.8;
}

[dir="rtl"] .prj__filter,
[dir="rtl"] .prj-item__meta {
	text-transform: none;
	letter-spacing: 0;
	font-size: 0.875rem;
}

[dir="rtl"] .prj-item__title {
	letter-spacing: 0;
	line-height: 1.45;
}

[dir="rtl"] [lang="en"] .prj-item__title {
	font-family: var(--f-latin);
	letter-spacing: -0.03em;
	line-height: 1.12;
}