/**
 * Magon Content Graph — timeline / time-wheel styles.
 *
 * Component states:
 *   .mcg-timeline                    — root mount
 *   .mcg-timeline__loading            — initial fetch
 *   .mcg-timeline__error              — REST failure
 *   .mcg-timeline__sleeping           — <2 snapshots: explanation text
 *   .mcg-timeline__inner              — populated slider UI (2+ snapshots)
 *   .mcg-timeline__slider             — native input[type=range] (44×44 thumb)
 *   .mcg-timeline-chip                — appended next to .mcg-hero__stat-value etc.
 *
 * Design-tokenised: respects --mcg-* variables already defined by graph.css.
 */

.mcg-timeline {
	margin: var(--mcg-s4) 0;
	padding: var(--mcg-s3) var(--mcg-s4);
	border: 1px solid var(--mcg-border);
	border-radius: 8px;
	background: var(--mcg-bg-secondary);
	font-family: var(--mcg-font-sans);
	font-size: 14px;
	line-height: 1.5;
}

/* Loading + error */
.mcg-timeline__loading,
.mcg-timeline__error {
	display: block;
	color: var(--mcg-text-muted);
	font-style: italic;
}

.mcg-timeline__error {
	color: #B23A3A;
}

/* Sleeping state (1 snapshot) */
.mcg-timeline__sleeping {
	display: flex;
	align-items: flex-start;
	gap: var(--mcg-s3);
}

.mcg-timeline__sleeping-icon {
	font-size: 24px;
	line-height: 1;
	flex-shrink: 0;
}

.mcg-timeline__sleeping-text {
	margin: 0;
	color: var(--mcg-text-secondary);
	font-size: 14px;
	line-height: 1.6;
}

.mcg-timeline__sleeping-meta {
	margin: var(--mcg-s2) 0 0;
	color: var(--mcg-text-muted);
	font-size: 12px;
	font-feature-settings: "tnum";
}

/* Slider state */
.mcg-timeline__inner {
	display: flex;
	flex-direction: column;
	gap: var(--mcg-s2);
}

.mcg-timeline__label {
	display: flex;
	justify-content: space-between;
	align-items: baseline;
	font-weight: 700;
	color: var(--mcg-text-primary);
}

.mcg-timeline__label-text {
	letter-spacing: 0.04em;
	font-size: 12px;
	text-transform: uppercase;
	color: var(--mcg-text-muted);
}

.mcg-timeline__output {
	font-feature-settings: "tnum";
	font-size: 16px;
	color: var(--mcg-accent);
	font-weight: 700;
}

/* Native range input — touch-friendly */
.mcg-timeline__slider {
	width: 100%;
	height: 44px; /* WCAG 2.5.5 — 44 minimum for the slider track region */
	margin: 0;
	background: transparent;
	-webkit-appearance: none;
	appearance: none;
	touch-action: pan-y;
}

.mcg-timeline__slider::-webkit-slider-runnable-track {
	height: 6px;
	background: var(--mcg-border-strong);
	border-radius: 3px;
}

.mcg-timeline__slider::-moz-range-track {
	height: 6px;
	background: var(--mcg-border-strong);
	border-radius: 3px;
}

.mcg-timeline__slider::-webkit-slider-thumb {
	-webkit-appearance: none;
	appearance: none;
	width: 20px;
	height: 20px;
	margin-top: -7px;
	border-radius: 50%;
	background: var(--mcg-accent);
	border: 2px solid var(--mcg-bg-primary);
	box-shadow: 0 1px 4px rgba(0,0,0,0.2);
	cursor: grab;
}

.mcg-timeline__slider::-moz-range-thumb {
	width: 20px;
	height: 20px;
	border-radius: 50%;
	background: var(--mcg-accent);
	border: 2px solid var(--mcg-bg-primary);
	box-shadow: 0 1px 4px rgba(0,0,0,0.2);
	cursor: grab;
}

.mcg-timeline__slider:focus {
	outline: none;
}

.mcg-timeline__slider:focus-visible::-webkit-slider-thumb {
	box-shadow: 0 0 0 3px var(--mcg-accent-light);
}

.mcg-timeline__slider:focus-visible::-moz-range-thumb {
	box-shadow: 0 0 0 3px var(--mcg-accent-light);
}

.mcg-timeline__legend {
	display: flex;
	justify-content: space-between;
	font-size: 12px;
	color: var(--mcg-text-muted);
	font-feature-settings: "tnum";
}

.mcg-timeline__legend-item--end {
	font-weight: 700;
	color: var(--mcg-text-primary);
}

/* Delta chip — appended to .mcg-hero__stat-value / pill-value with data-mcg-stat */
.mcg-timeline-chip {
	display: inline-block;
	margin-left: 0.4em;
	padding: 2px 8px;
	border-radius: 4px;
	font-family: var(--mcg-font-sans);
	font-size: 0.7em;
	font-weight: 700;
	font-feature-settings: "tnum";
	letter-spacing: 0.02em;
	vertical-align: middle;
	transition: opacity 0.18s ease;
}

.mcg-timeline-chip--up {
	background: rgba(43, 138, 62, 0.12);
	color: #2B8A3E;
}

.mcg-timeline-chip--down {
	background: rgba(195, 71, 71, 0.12);
	color: #C34747;
}

[data-theme="dark"] .mcg-timeline-chip--up {
	background: rgba(70, 195, 110, 0.18);
	color: #5BD080;
}

[data-theme="dark"] .mcg-timeline-chip--down {
	background: rgba(220, 100, 100, 0.18);
	color: #E08A8A;
}

/* Mobile tweaks */
@media (max-width: 600px) {
	.mcg-timeline__label {
		flex-direction: column;
		gap: 4px;
	}

	.mcg-timeline-chip {
		display: block;
		margin: 4px 0 0;
		font-size: 0.85em;
	}
}

/* Year-clickable bar — hover + focus state on chronicle */
.mcg-sparkline a:hover .mcg-spark__bar {
	opacity: 0.85;
}

.mcg-sparkline a:focus-visible {
	outline: 2px solid var(--mcg-accent);
	outline-offset: 1px;
}

.mcg-spark__year-link,
.mcg-spark__year-link:visited,
.mcg-spark__year-link:hover {
	display: block;
	color: inherit;
	text-decoration: none !important;
}

.mcg-spark__year-link:hover .mcg-spark__year,
.mcg-spark__year-link:focus-visible .mcg-spark__year {
	color: var(--mcg-accent);
}
/* ─── Chronicle scroll + epoch summary (Fix #1, RC2) ─────────────────────── */

/* Horizontal scroller wrapping the 28-year sparkline. Mirrors the keyboard +
   dark-theme pattern of `.mcg-table-scroll` (graph.css). */
.mcg-chronicle__scroll {
	position: relative; /* anchor for ::before/::after edge gradients */
	overflow-x: auto;
	overflow-y: hidden;
	padding-block: 8px;
	scroll-padding-inline-start: 24px;
	scrollbar-gutter: stable;
}

.mcg-chronicle__scroll:focus-visible {
	outline: 2px solid var(--mcg-accent, #2B6CB0);
	outline-offset: 2px;
	border-radius: 4px;
}

/* Force the sparkline to a min-width that exceeds typical container width on
   mobile/tablet so horizontal scroll always engages and the user discovers the
   affordance via edge-gradient + scroll-hint text. */
.mcg-chronicle__scroll svg.mcg-sparkline {
	min-width: 1120px; /* 28 years × 40px each at the design's 2× SVG-unit→CSS-px ratio */
	display: block;
}

.mcg-chronicle__scroll .mcg-spark__labels {
	min-width: 1120px;
}

/* Edge fades — visual signal «there is more, scroll horizontally». Hidden on
   wide viewports where all 28 bars fit without scroll. */
.mcg-chronicle__scroll::before,
.mcg-chronicle__scroll::after {
	content: '';
	position: absolute;
	top: 0;
	bottom: 16px; /* sit above the scrollbar */
	width: 24px;
	pointer-events: none;
	z-index: 1;
}
.mcg-chronicle__scroll::before {
	left: 0;
	background: linear-gradient(to right, var(--mcg-bg-primary, #fff), transparent);
}
.mcg-chronicle__scroll::after {
	right: 0;
	background: linear-gradient(to left, var(--mcg-bg-primary, #fff), transparent);
}

@media (min-width: 1280px) {
	/* 28 bars × 40px ≈ 1120px — at 1280px viewport width, after typical
	   GeneratePress content padding (~80px each side), usable width still
	   exceeds 1120px and all bars fit without scroll, so the scroll cues
	   are no longer needed. The container itself stays scrollable in case a
	   future year pushes the SVG past the container. */
	.mcg-chronicle__scroll::before,
	.mcg-chronicle__scroll::after {
		display: none;
	}
	.mcg-chronicle__scroll-hint {
		display: none;
	}
}

.mcg-chronicle__scroll-hint {
	margin-block: 4px 0;
	font-size: 13px;
	font-style: italic;
	color: var(--mcg-text-muted, #666);
	text-align: center;
}

/* Three-up grid of epoch buttons. On <640px stacks vertically. */
.mcg-chronicle__epochs {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 16px;
	margin-block-start: 24px;
	list-style: none;
	padding: 0;
}
@media (max-width: 640px) {
	.mcg-chronicle__epochs {
		grid-template-columns: 1fr;
		gap: 8px;
	}
}

.mcg-chronicle__epoch {
	margin: 0;
}

.mcg-chronicle__epoch-btn {
	display: flex;
	flex-direction: column;
	align-items: flex-start;
	gap: 4px;
	width: 100%;
	min-height: 44px; /* WCAG 2.5.5 touch target */
	padding: 12px 16px;
	background: var(--mcg-bg-secondary, #f5f5f5);
	border: 1px solid var(--mcg-border, #e0e0e0);
	border-radius: 8px;
	color: var(--mcg-text-primary);
	font: inherit;
	cursor: pointer;
	text-align: left;
	transition: background-color 150ms ease, border-color 150ms ease, transform 120ms ease-out;
}

.mcg-chronicle__epoch-btn:hover,
.mcg-chronicle__epoch-btn:focus-visible {
	background: var(--mcg-bg-tertiary, #ebebeb);
	border-color: var(--mcg-accent, #2B6CB0);
}
.mcg-chronicle__epoch-btn:focus-visible {
	outline: 2px solid var(--mcg-accent, #2B6CB0);
	outline-offset: 2px;
}

.mcg-chronicle__epoch-range {
	font-weight: 700;
	font-size: 14px;
	letter-spacing: 0.02em;
}

.mcg-chronicle__epoch-count {
	font-size: 12px;
	color: var(--mcg-text-muted, #666);
}

@media (prefers-reduced-motion: reduce) {
	.mcg-chronicle__epoch-btn {
		transition: none;
	}
}