.syou-animated-timeline {
	--syou-rail-column: 32px;
	--syou-content-gap: 20px;
	--syou-stage-gap: 38px;
	--syou-marker-offset: 3px;
	--syou-marker-size: 20px;
	--syou-marker-border-width: 1px;
	--syou-line-width: 2px;
	--syou-line-tail: 18px;
	--syou-line-inactive: #343b49;
	--syou-line-active: #1c20ff;
	--syou-line-flow-color: rgba(255, 255, 255, 0.85);
	--syou-line-flow-size: 46px;
	--syou-line-flow-duration: 1500ms;
	--syou-marker-cutout: #020817;
	--syou-marker-pending-bg: transparent;
	--syou-marker-pending-border: #596171;
	--syou-marker-complete-bg: #1c20ff;
	--syou-marker-complete-border: #1c20ff;
	--syou-track-top: 0px;
	--syou-track-height: 0px;
	--syou-progress-top: var(--syou-line-tail);
	--syou-progress-height: 0px;
	--syou-animation-duration: 1800ms;
	--syou-animation-easing: ease-in-out;
	position: relative;
	width: 100%;
	box-sizing: border-box;
}

.syou-animated-timeline,
.syou-animated-timeline * {
	box-sizing: border-box;
}

.syou-animated-timeline__stages {
	position: relative;
	z-index: 2;
}

.syou-animated-timeline__stage {
	display: grid;
	grid-template-columns: minmax(0, var(--syou-rail-column)) minmax(0, 1fr);
	column-gap: var(--syou-content-gap);
	align-items: start;
	position: relative;
	min-width: 0;
	padding: 0 0 var(--syou-stage-gap);
}

.syou-animated-timeline__stage:last-child {
	padding-bottom: 0;
}

.syou-animated-timeline__rail-cell {
	display: flex;
	align-items: flex-start;
	justify-content: center;
	position: relative;
	z-index: 3;
	min-width: 0;
	padding-top: var(--syou-marker-offset);
}

/*
 * Osobna maska znajduje się za checkboxem, ale przed linią.
 * Dzięki temu linia nie przechodzi przez środek pustego znacznika,
 * a jego obramowanie pozostaje w pełni widoczne.
 */
.syou-animated-timeline__rail-cell::before {
	content: '';
	position: absolute;
	z-index: 0;
	top: var(--syou-marker-offset);
	left: 50%;
	width: calc(var(--syou-marker-size) + (var(--syou-line-width) * 2));
	height: var(--syou-marker-size);
	transform: translateX(-50%);
	background: var(--syou-marker-cutout);
	border-radius: inherit;
	pointer-events: none;
}

.syou-animated-timeline__marker {
	display: inline-flex !important;
	align-items: center;
	justify-content: center;
	flex: 0 0 auto;
	position: relative;
	z-index: 1;
	width: var(--syou-marker-size);
	height: var(--syou-marker-size);
	min-width: var(--syou-marker-size);
	min-height: var(--syou-marker-size);
	padding: 0;
	margin: 0;
	opacity: 1;
	visibility: visible;
	color: transparent;
	background-color: var(--syou-marker-pending-bg);
	background-image: none;
	border-style: solid !important;
	border-width: var(--syou-marker-border-width) !important;
	border-color: var(--syou-marker-pending-border) !important;
	box-shadow: none;
	transition:
		background-color 240ms ease,
		border-color 240ms ease,
		color 240ms ease,
		transform 240ms ease,
		box-shadow 240ms ease;
}

.syou-animated-timeline__marker-icon {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	position: relative;
	z-index: 2;
	line-height: 1;
	opacity: 0;
	transform: scale(0.55);
	transition: opacity 220ms ease, transform 220ms ease;
}

.syou-animated-timeline__marker-icon i,
.syou-animated-timeline__marker-icon svg {
	display: block;
}

.syou-animated-timeline__stage.is-completed .syou-animated-timeline__marker {
	color: inherit;
	background-color: var(--syou-marker-complete-bg);
	border-color: var(--syou-marker-complete-border) !important;
}

.syou-animated-timeline__stage.is-completed .syou-animated-timeline__marker-icon {
	opacity: 1;
	transform: scale(1);
}

.syou-animated-timeline__content {
	min-width: 0;
	transition: opacity 250ms ease;
}

.syou-animated-timeline__date,
.syou-animated-timeline__title {
	max-width: 100%;
	overflow-wrap: anywhere;
	word-break: normal;
	transition: color 250ms ease, opacity 250ms ease;
}

.syou-animated-timeline__title {
	padding: 0;
}

.syou-animated-timeline__track {
	position: absolute;
	z-index: 1;
	left: calc(var(--syou-rail-column) / 2 - var(--syou-line-width) / 2);
	top: var(--syou-track-top);
	width: var(--syou-line-width);
	height: var(--syou-track-height);
	pointer-events: none;
	overflow: hidden;
}

.syou-animated-timeline__line {
	position: absolute;
	inset: 0 auto auto 0;
	display: block;
	width: 100%;
}

/* Delikatny zanik nad pierwszym i pod ostatnim checkboxem. */
.syou-animated-timeline__line--base {
	height: 100%;
	background: linear-gradient(
		to bottom,
		transparent 0,
		var(--syou-line-inactive) var(--syou-line-tail),
		var(--syou-line-inactive) calc(100% - var(--syou-line-tail)),
		transparent 100%
	);
}

/* Wysokość postępu aktualizuje się przy zmianie daty/statusu. */
.syou-animated-timeline__line--active {
	top: var(--syou-progress-top);
	height: var(--syou-progress-height);
	max-height: calc(100% - var(--syou-progress-top));
	background: var(--syou-line-active);
	transform-origin: top center;
	transition-property: height;
	transition-duration: var(--syou-animation-duration);
	transition-timing-function: var(--syou-animation-easing);
	will-change: height;
	overflow: hidden;
}

/*
 * Niezależnie od jednorazowego wydłużenia linii stale przesuwa się po niej
 * świetlny impuls. Daje to ciągły ruch od góry do dołu.
 */
.syou-animated-timeline.has-continuous-flow .syou-animated-timeline__line--active::after {
	content: '';
	position: absolute;
	inset: 0;
	background-image: linear-gradient(
		to bottom,
		transparent 0%,
		var(--syou-line-flow-color) 48%,
		var(--syou-line-flow-color) 52%,
		transparent 100%
	);
	background-repeat: no-repeat;
	background-size: 100% var(--syou-line-flow-size);
	background-position: 0 calc(-1 * var(--syou-line-flow-size));
	animation: syou-timeline-line-flow var(--syou-line-flow-duration) linear infinite;
	will-change: background-position;
}

@keyframes syou-timeline-line-flow {
	from {
		background-position: 0 calc(-1 * var(--syou-line-flow-size));
	}
	to {
		background-position: 0 calc(100% + var(--syou-line-flow-size));
	}
}

.syou-animated-timeline.is-no-animation .syou-animated-timeline__line--active,
.syou-animated-timeline.is-no-animation .syou-animated-timeline__marker,
.syou-animated-timeline.is-no-animation .syou-animated-timeline__marker-icon {
	transition-duration: 0ms !important;
}

@media (prefers-reduced-motion: reduce) {
	.syou-animated-timeline__line--active,
	.syou-animated-timeline__marker,
	.syou-animated-timeline__marker-icon,
	.syou-animated-timeline__date,
	.syou-animated-timeline__title {
		transition-duration: 0ms !important;
	}

	.syou-animated-timeline.has-continuous-flow .syou-animated-timeline__line--active::after {
		animation: none !important;
		display: none;
	}
}