/**
 * Related posts horizontal slider (single post)
 * Desktop: multi-card slider + arrows
 * Mobile: swipe + peek next card (app-style)
 */

.strip-related {
	--strip-related-gap: var(--space-5, 20px);
	--strip-related-peek: 18%;
	margin: var(--space-10, 40px) 0 var(--space-8, 32px);
	padding: 0;
	width: 100%;
}

.strip-related__head {
	display: flex;
	align-items: flex-end;
	justify-content: space-between;
	gap: var(--space-4, 16px);
	margin-bottom: var(--space-5, 20px);
}

.strip-related__heading {
	font-size: clamp(1.25rem, 2vw, 1.5rem);
	font-weight: var(--font-weight-bold, 700);
	line-height: 1.25;
	margin: 0;
	color: rgb(var(--color-primary-dark));
	letter-spacing: -0.01em;
	position: relative;
	padding-bottom: 14px;
	display: inline-block;
}

.strip-related__heading::after {
	content: "";
	position: absolute;
	bottom: 0;
	left: 0;
	width: 36px;
	height: 3px;
	background: rgb(var(--color-accent));
	border-radius: 2px;
}

.strip-related__nav {
	display: flex;
	gap: 8px;
	flex-shrink: 0;
}

.strip-related__nav[hidden] {
	display: none !important;
}

.strip-related__btn {
	width: 40px;
	height: 40px;
	border-radius: var(--radius-full, 9999px);
	border: 1.5px solid rgb(var(--color-primary));
	background: rgb(var(--color-white));
	color: rgb(var(--color-primary));
	font-size: 1.35rem;
	line-height: 1;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	cursor: pointer;
	transition:
		background-color var(--duration-fast, 0.2s) ease,
		color var(--duration-fast, 0.2s) ease,
		border-color var(--duration-fast, 0.2s) ease,
		opacity var(--duration-fast, 0.2s) ease;
}

.strip-related__btn:hover:not(:disabled) {
	background: rgb(var(--color-primary));
	color: rgb(var(--color-white));
}

.strip-related__btn:disabled {
	opacity: 0.35;
	cursor: default;
}

.strip-related__btn:focus-visible {
	outline: 2px solid rgb(var(--color-accent));
	outline-offset: 2px;
}

.strip-related__viewport {
	position: relative;
	overflow: hidden;
}

.strip-related__track {
	display: flex;
	gap: var(--strip-related-gap);
	overflow-x: auto;
	overflow-y: hidden;
	scroll-snap-type: x mandatory;
	scroll-behavior: smooth;
	-webkit-overflow-scrolling: touch;
	overscroll-behavior-x: contain;
	scrollbar-width: none;
	padding-bottom: 4px;
}

.strip-related__track::-webkit-scrollbar {
	display: none;
}

.strip-related__card {
	flex: 0 0 calc((100% - (2 * var(--strip-related-gap))) / 3);
	scroll-snap-align: start;
	min-width: 0;
	background: rgb(var(--color-white));
	border-radius: var(--radius-lg, 12px);
	border: 1px solid rgba(var(--color-border-light), 0.9);
	box-shadow: var(--shadow-card-sm);
	overflow: hidden;
	transition:
		transform var(--duration-fast, 0.2s) cubic-bezier(0.16, 1, 0.3, 1),
		box-shadow var(--duration-fast, 0.2s) cubic-bezier(0.16, 1, 0.3, 1);
}

.strip-related__card:hover {
	transform: translateY(-2px);
	box-shadow: var(--shadow-card-hover);
}

.strip-related__link {
	display: flex;
	flex-direction: column;
	height: 100%;
	color: inherit;
	text-decoration: none;
}

.strip-related__media {
	aspect-ratio: 16 / 10;
	overflow: hidden;
	background: rgb(var(--color-gray-200));
}

.strip-related__img {
	display: block;
	width: 100%;
	height: 100%;
	object-fit: cover;
	transition: transform var(--duration-base, 0.3s) cubic-bezier(0.16, 1, 0.3, 1);
}

.strip-related__img--placeholder {
	background: linear-gradient(
		135deg,
		rgba(var(--color-primary), 0.12),
		rgba(var(--color-primary-dark), 0.2)
	);
}

.strip-related__card:hover .strip-related__img {
	transform: scale(1.03);
}

.strip-related__body {
	padding: var(--space-4, 16px) var(--space-5, 20px) var(--space-5, 20px);
	display: flex;
	flex-direction: column;
	flex: 1 1 auto;
	gap: 6px;
}

.strip-related__cat {
	font-size: 0.75rem;
	font-weight: 700;
	letter-spacing: 0.04em;
	text-transform: uppercase;
	color: rgb(var(--color-primary));
}

.strip-related__title {
	font-size: clamp(1rem, 1.15vw, 1.125rem);
	font-weight: 700;
	line-height: 1.35;
	margin: 0;
	color: rgb(var(--color-text-dark));
	letter-spacing: -0.01em;
	display: -webkit-box;
	-webkit-line-clamp: 2;
	-webkit-box-orient: vertical;
	overflow: hidden;
}

.strip-related__meta {
	margin: 0;
	font-size: 0.8125rem;
	color: rgb(var(--color-text-muted));
}

.strip-related__excerpt {
	margin: 4px 0 0;
	font-size: 0.9375rem;
	line-height: 1.55;
	color: rgb(var(--color-text-body));
	display: -webkit-box;
	-webkit-line-clamp: 2;
	-webkit-box-orient: vertical;
	overflow: hidden;
}

/* Tablet: 2 cards */
@media (max-width: 1024px) {
	.strip-related__card {
		flex-basis: calc((100% - var(--strip-related-gap)) / 2);
	}
}

/* Mobile: swipe + peek next card (không dùng margin âm — tránh tràn viewport) */
@media (max-width: 767px) {
	.strip-related {
		--strip-related-gap: 12px;
		--strip-related-peek: 48px;
		margin-top: var(--space-8, 32px);
		max-width: 100%;
	}

	.strip-related__nav {
		display: none !important;
	}

	.strip-related__viewport {
		overflow: hidden;
		width: 100%;
		max-width: 100%;
	}

	.strip-related__track {
		padding-right: 0;
		scroll-padding-inline: 0;
	}

	.strip-related__card {
		flex: 0 0 calc(100% - var(--strip-related-peek));
		max-width: calc(100% - var(--strip-related-peek));
		scroll-snap-align: start;
	}

	.strip-related__body {
		padding: var(--space-3, 12px) var(--space-4, 16px) var(--space-4, 16px);
	}
}

@media (prefers-reduced-motion: reduce) {
	.strip-related__track {
		scroll-behavior: auto;
	}

	.strip-related__card,
	.strip-related__img {
		transition: none;
	}
}