/*
 * Hall Place Estate — timeline block styles (SPEC §5).
 * Vertical gold hairline; alternating card sides on desktop (>=900px);
 * single column on mobile; year marker discs riding the line; entry images
 * lazy-loaded by PHP; animation is opt-in via .hp-timeline--anim (added by
 * assets/js/timeline.js) and fully disabled under prefers-reduced-motion.
 *
 * Mobile-first. Depends on tokens defined in style.css (:root --hp-*).
 */

/* --------------------------------------------------------------------------
   1. Block shell
   -------------------------------------------------------------------------- */
.hp-timeline {
	margin-block: var(--hp-space-4, 4rem) 0;
	color: var(--hp-charcoal);
}

.hp-timeline__heading {
	font-size: clamp(1.875rem, 4vw, 2.75rem);
	text-align: center;
	margin: 0 0 var(--hp-space-4, 3rem);
}

.hp-timeline__empty-note {
	border: 1px dashed var(--hp-gold, #b08d3e);
	background: var(--hp-stone, #e8e2d4);
	padding: 1rem 1.25rem;
	font-size: 0.9375rem;
	color: var(--hp-ink-60, rgba(43, 43, 40, 0.72));
}

/* --------------------------------------------------------------------------
   2. The spine — 1px gold hairline at 40%
   -------------------------------------------------------------------------- */
.hp-timeline__list {
	position: relative;
	list-style: none;
	margin: 0;
	padding: 0;
}

/* The line: centred on the 44px marker column (mobile, left rail). */
.hp-timeline__list::before {
	content: "";
	position: absolute;
	inset-block: 0.5rem;
	left: 22px;
	width: 1px;
	background: var(--hp-gold-40, rgba(176, 141, 62, 0.4));
}

/* --------------------------------------------------------------------------
   3. Mobile: single column, left rail
   -------------------------------------------------------------------------- */
.hp-timeline__entry {
	position: relative;
	display: grid;
	grid-template-columns: 44px minmax(0, 1fr);
	column-gap: 1.25rem;
	align-items: start;
	padding-block: 0 2.75rem;
}

.hp-timeline__entry:last-child {
	padding-block-end: 0.5rem;
}

.hp-timeline__marker {
	grid-column: 1;
	grid-row: 1;
	justify-self: center;
	align-self: start;
}

.hp-timeline__year {
	display: inline-grid;
	place-items: center;
	min-width: 44px;
	max-width: 44px;
	height: 44px;
	padding-inline: 0.25rem;
	border: 1px solid var(--hp-gold, #b08d3e);
	border-radius: 999px;
	background: var(--hp-ivory, #f7f4ec);
	color: var(--hp-green, #1f3d2b);
	font-family: var(--hp-font-body, Georgia, serif);
	font-weight: 500;
	font-size: 0.8125rem;
	line-height: 1.1;
	letter-spacing: 0.02em;
	text-align: center;
	overflow-wrap: anywhere;
}

/* Empty-year marker: a small gold stud instead of a disc with text. */
.hp-timeline__year--dot {
	min-width: 14px;
	max-width: 14px;
	height: 14px;
	padding: 0;
	background: var(--hp-gold, #b08d3e);
	border-color: var(--hp-gold, #b08d3e);
}

/* Long labels ("1880s–1945") become pills on the line. */
.hp-timeline__year--long {
	min-width: 44px;
	max-width: 88px;
	width: auto;
	font-size: 0.75rem;
}

.hp-timeline__card {
	grid-column: 2;
	grid-row: 1;
	background: var(--hp-stone, #e8e2d4);
	border: 1px solid var(--hp-gold-40, rgba(176, 141, 62, 0.4));
	border-radius: var(--hp-radius, 0);
	box-shadow: var(--hp-shadow-card, 0 1px 2px rgba(43, 43, 40, 0.08));
	padding: 1.25rem 1.5rem;
}

@media (min-width: 600px) {
	.hp-timeline__card {
		padding: 1.75rem 2rem;
	}
}

/* Keyboard accessibility: a visible ring when anything inside is focused. */
.hp-timeline__card:focus-within {
	outline: 2px solid var(--hp-gold, #b08d3e);
	outline-offset: 3px;
}

/* --------------------------------------------------------------------------
   4. Card internals
   -------------------------------------------------------------------------- */
.hp-timeline__era {
	font-family: var(--hp-font-body, Georgia, serif);
	font-variant-caps: small-caps;
	text-transform: lowercase;
	letter-spacing: var(--hp-track-label, 0.12em);
	font-weight: 500;
	font-size: 0.875rem;
	color: var(--hp-gold, #b08d3e);
	margin: 0 0 0.375rem;
}

.hp-timeline__title {
	font-family: var(--hp-font-heading, Georgia, serif);
	font-weight: 600;
	font-size: 1.375rem;
	line-height: 1.2;
	color: var(--hp-green, #1f3d2b);
	margin: 0 0 0.75rem;
}

@media (min-width: 600px) {
	.hp-timeline__title {
		font-size: 1.625rem;
	}
}

.hp-timeline__body {
	color: var(--hp-ink-60, rgba(43, 43, 40, 0.72));
	font-size: 1rem;
}

.hp-timeline__body p {
	margin: 0;
}

.hp-timeline__figure {
	margin: 1.25rem 0 0;
}

.hp-timeline__image {
	display: block;
	width: 100%;
	height: auto;
	aspect-ratio: 16 / 10;
	object-fit: cover;
	border: 1px solid var(--hp-gold-40, rgba(176, 141, 62, 0.4));
	background: var(--hp-ivory, #f7f4ec);
}

.hp-timeline__credit {
	margin: 0.5rem 0 0;
	font-size: 0.8125rem;
	color: var(--hp-ink-40, rgba(43, 43, 40, 0.55));
}

/* --------------------------------------------------------------------------
   5. Unverified entries — placeholder card
   -------------------------------------------------------------------------- */
.hp-timeline--todo,
.hp-timeline__card.hp-timeline--todo {
	background: transparent;
	border: 1px dashed var(--hp-gold-40, rgba(176, 141, 62, 0.4));
	box-shadow: none;
}

.hp-timeline__todo-note {
	margin: 0;
	font-size: 0.875rem;
	line-height: 1.6;
	color: var(--hp-ink-40, rgba(43, 43, 40, 0.55));
	font-style: italic;
}

/* --------------------------------------------------------------------------
   6. Desktop (>=900px): centred line, alternating sides
   -------------------------------------------------------------------------- */
@media (min-width: 900px) {
	.hp-timeline__list::before {
		left: calc(50% - 0.5px);
	}

	.hp-timeline__entry {
		grid-template-columns: minmax(0, 1fr) 88px minmax(0, 1fr);
		column-gap: 0;
		padding-block: 0 4.5rem;
	}

	.hp-timeline__marker {
		grid-column: 2;
	}

	.hp-timeline__entry--left .hp-timeline__card {
		grid-column: 1;
		justify-self: end;
	}

	.hp-timeline__entry--right .hp-timeline__card {
		grid-column: 3;
		justify-self: start;
	}

	.hp-timeline--wide .hp-timeline__list,
	.hp-timeline--full .hp-timeline__list {
		max-width: none;
	}
}

/* Wide/full alignment: let the spine run the full column. */
.hp-timeline--full {
	max-width: none;
}

/* --------------------------------------------------------------------------
   7. Motion — subtle fade/translate, opt-in, reduced-motion safe
   -------------------------------------------------------------------------- */
.hp-timeline--anim .hp-timeline__entry {
	opacity: 0;
	transform: translateY(18px);
	transition:
		opacity 0.7s var(--hp-ease, ease) var(--hp-stagger, 0ms),
		transform 0.7s var(--hp-ease, ease) var(--hp-stagger, 0ms);
}

.hp-timeline--anim .hp-timeline__entry.hp-in-view {
	opacity: 1;
	transform: none;
}

/* Respect prefers-reduced-motion with belt AND braces (JS already abstains). */
@media (prefers-reduced-motion: reduce) {
	.hp-timeline--anim .hp-timeline__entry,
	.hp-timeline--anim .hp-timeline__entry.hp-in-view {
		opacity: 1 !important;
		transform: none !important;
		transition: none !important;
	}
}