/* Shared stacked scroll panels — homepage projects + single project sections */

.projects-stack {
	position: relative;
	width: 100%;
	background-color: var(--arb-text);
	color: var(--arb-text);
	z-index: 1;
}

.projects-stack__intro {
	width: 100%;
	padding: 6rem var(--arb-gutter) 3rem;
	text-align: center;
	background-color: var(--arb-text);
}

.projects-heading {
	font-size: clamp(2.5rem, 6.5vw, 4.5rem);
	font-weight: 800;
	line-height: 1.1;
	letter-spacing: -0.03em;
	color: var(--arb-bg);
	margin: 0 auto;
	font-family: var(--arb-font);
	will-change: transform, opacity;
}

/* Avoid pin-spacer layout jump, but do not force transform (breaks last pin on mobile) */
.projects-stack > .pin-spacer {
	display: block;
	margin: 0 !important;
}

.stack-panel {
	position: relative;
	height: 100vh;
	height: 100dvh;
	width: 100%;
	overflow: hidden;
	background-color: var(--arb-text);
	backface-visibility: hidden;
	transform: translateZ(0);
}

.stack-box {
	position: absolute;
	inset: 0;
	margin: 0 var(--arb-gutter);
	overflow: hidden;
	will-change: margin, transform, border-radius;
	background-color: var(--arb-surface);
}

.stack-panel[data-first="true"] .stack-box {
	border-radius: 10px 10px 0 0;
}

.stack-panel[data-final="true"] .stack-box {
	border-radius: 0 0 10px 10px;
}

.stack-panel[data-first="true"][data-final="true"] .stack-box {
	border-radius: 10px;
}

@media (max-width: 768px) {
	.stack-panel {
		height: 100svh;
	}

	.stack-box {
		margin: 0;
	}

	.stack-panel[data-first="true"] .stack-box,
	.stack-panel[data-final="true"] .stack-box,
	.stack-panel[data-first="true"][data-final="true"] .stack-box {
		border-radius: 0;
	}
}

.stack-box > img,
.stack-box__bg {
	position: absolute;
	inset: 0;
	width: 100%;
	height: 100%;
	object-fit: cover;
	transform: scale(1);
	will-change: transform;
}

.stack-box__bg {
	background-position: center;
	background-size: cover;
	background-color: var(--arb-surface);
}

.stack-overlay {
	position: absolute;
	inset: 0;
	background: linear-gradient(
		180deg,
		color-mix(in srgb, var(--arb-bg) 5%, transparent) 0%,
		color-mix(in srgb, var(--arb-bg) 60%, transparent) 100%
	);
	opacity: 0.15;
	will-change: opacity;
	z-index: 1;
}

.stack-content {
	position: absolute;
	inset: 0;
	width: 100%;
	max-width: none;
	padding: 2rem 5%;
	text-align: center;
	z-index: 2;
	opacity: 0;
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	gap: 1.25rem;
	will-change: opacity, transform;
	overflow: auto;
}

.stack-heading {
	position: static;
	width: 100%;
	max-width: 1100px;
	text-align: center;
	font-size: clamp(1.8rem, 4.5vw, 3.2rem);
	font-weight: 700;
	line-height: 1.15;
	color: var(--arb-text);
	margin: 0;
	font-family: var(--arb-font);
	text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.stack-more {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	padding: 0.85rem 1.6rem;
	border: 1px solid color-mix(in srgb, var(--arb-text) 70%, transparent);
	border-radius: 5px;
	color: var(--arb-text);
	background: color-mix(in srgb, var(--arb-bg) 35%, transparent);
	backdrop-filter: blur(8px);
	-webkit-backdrop-filter: blur(8px);
	font-size: 0.95rem;
	font-weight: 600;
	letter-spacing: 0.02em;
	text-decoration: none;
	font-family: var(--arb-font);
	transition: background 0.25s ease, border-color 0.25s ease, color 0.25s ease;
}

.stack-more:hover,
.stack-more:focus-visible {
	background: var(--arb-text);
	color: var(--arb-bg);
	border-color: var(--arb-text);
	outline: none;
}