/* wpagent/timeline (+ timeline-item) — defaults; per-instance values come
   from the style engine as custom properties. Each item but the last draws
   the line segment from its marker to the next item. */
.wpab-timeline {
	--wpab-tl-col: var(--wpab-tl-marker, 40px);
	--wpab-tl-w: var(--wpab-tl-line-w, 2px);
	--wpab-tl-g: var(--wpab-tl-gap, 32px);
	display: flex;
	flex-direction: column;
	gap: var(--wpab-tl-g);
	margin: 0;
	padding: 0;
	list-style: none;
}

.wpab-timeline-item {
	position: relative;
	display: grid;
	grid-template-columns: var(--wpab-tl-col) minmax(0, 1fr);
	column-gap: 20px;
	align-items: start;
	margin: 0;
}

.wpab-timeline-item__marker {
	position: relative;
	z-index: 1;
	grid-column: 1;
	grid-row: 1;
	justify-self: center;
	display: grid;
	place-items: center;
	box-sizing: border-box;
	width: var(--wpab-tl-col);
	height: var(--wpab-tl-col);
	border-radius: 50%;
	background: var(--wpab-tl-marker-bg, var(--wp--preset--color--accent, #2563eb));
	color: var(--wpab-tl-marker-fg, var(--wp--preset--color--on-accent, #fff));
	font-weight: 600;
	line-height: 1;
}

.wpab-timeline-item__icon {
	width: 50%;
	height: 50%;
}

/* Dot markers (items without an icon): small, aligned with the first text line. */
.wpab-timeline.is-marker-dot > .wpab-timeline-item:not(.has-icon) > .wpab-timeline-item__marker {
	width: var(--wpab-tl-marker, 14px);
	height: var(--wpab-tl-marker, 14px);
	margin-top: 0.3em;
}

.wpab-timeline.is-marker-number {
	counter-reset: wpab-tl;
}

.wpab-timeline.is-marker-number > .wpab-timeline-item {
	counter-increment: wpab-tl;
}

.wpab-timeline.is-marker-number > .wpab-timeline-item:not(.has-icon) > .wpab-timeline-item__marker::before {
	content: counter(wpab-tl);
}

.wpab-timeline-item__content {
	grid-column: 2;
	grid-row: 1;
	min-width: 0;
}

.wpab-timeline-item__date {
	margin: 0 0 4px;
	color: var(--wp--preset--color--accent, #2563eb);
	font-size: 0.875em;
	font-weight: 600;
}

.wpab-timeline-item__title {
	margin: 0;
	color: inherit;
	font-size: 1.125em;
	line-height: 1.35;
}

.wpab-timeline-item__text {
	margin-top: 6px;
	color: var(--wp--preset--color--muted, inherit);
}

/* The line: from this marker's centre down to the next item. */
.wpab-timeline-item:not(:last-child)::before {
	content: "";
	position: absolute;
	top: calc(var(--wpab-tl-col) / 2);
	bottom: calc(-1 * var(--wpab-tl-g));
	left: calc(var(--wpab-tl-col) / 2 - var(--wpab-tl-w) / 2);
	border-left: var(--wpab-tl-w) var(--wpab-tl-line-style, solid) var(--wpab-tl-line, var(--wp--preset--color--line, rgba(17, 24, 39, .12)));
}

.wpab-timeline.is-marker-dot > .wpab-timeline-item:not(.has-icon):not(:last-child)::before {
	top: calc(0.3em + var(--wpab-tl-marker, 14px) / 2);
}

[dir="rtl"] .wpab-timeline-item:not(:last-child)::before {
	right: calc(var(--wpab-tl-col) / 2 - var(--wpab-tl-w) / 2);
	left: auto;
}

@media (min-width: 768px) {
	/* Alternate: line in the middle, odd items on the start side, even on the end side. */
	.wpab-timeline.is-vertical.is-layout-alternate > .wpab-timeline-item {
		grid-template-columns: minmax(0, 1fr) var(--wpab-tl-col) minmax(0, 1fr);
	}

	.wpab-timeline.is-vertical.is-layout-alternate > .wpab-timeline-item > .wpab-timeline-item__marker {
		grid-column: 2;
	}

	.wpab-timeline.is-vertical.is-layout-alternate > .wpab-timeline-item:nth-child(odd) > .wpab-timeline-item__content {
		grid-column: 1;
		text-align: end;
	}

	.wpab-timeline.is-vertical.is-layout-alternate > .wpab-timeline-item:nth-child(even) > .wpab-timeline-item__content {
		grid-column: 3;
	}

	.wpab-timeline.is-vertical.is-layout-alternate > .wpab-timeline-item:not(:last-child)::before,
	[dir="rtl"] .wpab-timeline.is-vertical.is-layout-alternate > .wpab-timeline-item:not(:last-child)::before {
		right: auto;
		left: calc(50% - var(--wpab-tl-w) / 2);
	}

	/* Horizontal: items side by side, markers on one line, text below. */
	.wpab-timeline.is-horizontal {
		flex-direction: row;
		overflow-x: auto;
	}

	.wpab-timeline.is-horizontal > .wpab-timeline-item {
		flex: 1 1 0;
		min-width: 160px;
		grid-template-columns: minmax(0, 1fr);
		grid-template-rows: var(--wpab-tl-col) auto;
		row-gap: 16px;
	}

	.wpab-timeline.is-horizontal > .wpab-timeline-item > .wpab-timeline-item__marker {
		grid-column: 1;
		justify-self: start;
		align-self: center;
	}

	.wpab-timeline.is-horizontal.is-marker-dot > .wpab-timeline-item:not(.has-icon) > .wpab-timeline-item__marker {
		margin: 0 0 0 calc((var(--wpab-tl-col) - var(--wpab-tl-marker, 14px)) / 2);
	}

	.wpab-timeline.is-horizontal > .wpab-timeline-item > .wpab-timeline-item__content {
		grid-column: 1;
		grid-row: 2;
	}

	.wpab-timeline.is-horizontal > .wpab-timeline-item:not(:last-child)::before,
	[dir="rtl"] .wpab-timeline.is-horizontal > .wpab-timeline-item:not(:last-child)::before {
		top: calc(var(--wpab-tl-col) / 2 - var(--wpab-tl-w) / 2);
		right: calc(-1 * var(--wpab-tl-g));
		bottom: auto;
		left: calc(var(--wpab-tl-col) / 2);
		border-top: var(--wpab-tl-w) var(--wpab-tl-line-style, solid) var(--wpab-tl-line, var(--wp--preset--color--line, rgba(17, 24, 39, .12)));
		border-left: 0;
	}

	.wpab-timeline.is-horizontal.is-marker-dot > .wpab-timeline-item:not(.has-icon):not(:last-child)::before {
		top: calc(var(--wpab-tl-col) / 2 - var(--wpab-tl-w) / 2);
	}
}