/* ===== Funnel flow (animated Sankey) =====
   A <figure class="ff"> holding a JSON data block; js/funnel-flow.js draws the
   chart into .ff-chart. Neutral ink for traffic, one accent for conversions.
*/
.ff {
	--ff-win: #2e7d5b;
	margin: 0;
	padding: 1.5rem;
	background: var(--cs-raised);
	border: 1px solid var(--cs-line);
	border-radius: var(--cs-radius);
}

[data-bs-theme="dark"] .ff {
	--ff-win: #63c598;
}

.ff-head {
	display: flex;
	align-items: flex-start;
	justify-content: space-between;
	gap: 1rem;
	margin-bottom: 1rem;
}

body .ff .ff-title {
	margin: 0;
	font-size: 1rem;
	font-weight: 600;
	line-height: 1.3;
	color: var(--cs-ink);
}

body .ff .ff-sub {
	margin: 0.15rem 0 0;
	font-size: 0.875rem;
	line-height: 1.4;
	color: var(--cs-muted);
}

.ff-toggle {
	flex: none;
	font-family: var(--cs-mono);
	font-size: 0.66rem;
	font-weight: 500;
	letter-spacing: 0.12em;
	text-transform: uppercase;
	line-height: 1;
	color: var(--cs-muted);
	background: transparent;
	border: 1px solid var(--cs-line);
	border-radius: 3px;
	padding: 0.5em 0.7em;
	cursor: pointer;
	transition: color 0.2s ease, border-color 0.2s ease;
}

.ff-toggle:hover {
	color: var(--cs-ink);
	border-color: var(--cs-ink);
}

.ff-toggle:focus-visible {
	outline: 2px solid var(--cs-accent);
	outline-offset: 2px;
}

/* ---------- Chart ---------- */
.ff-svg {
	display: block;
	overflow: visible;
}

.ff-link {
	fill: none;
	stroke: var(--cs-ink);
	stroke-opacity: 0.08;
	transition: stroke-opacity 0.25s ease;
}

.ff-link.is-win {
	stroke: var(--ff-win);
	stroke-opacity: 0.55;
}

.ff-svg.has-active .ff-link {
	stroke-opacity: 0.04;
}

.ff-svg.has-active .ff-link.is-on {
	stroke-opacity: 0.2;
}

.ff-svg.has-active .ff-link.is-win {
	stroke-opacity: 0.2;
}

.ff-svg.has-active .ff-link.is-win.is-on {
	stroke-opacity: 0.8;
}

.ff-node {
	opacity: 0;
	cursor: pointer;
	outline: none;
	transition: opacity 0.4s ease;
}

.ff-node.is-in {
	opacity: 1;
}

.ff-svg.has-active .ff-node.is-in:not(.is-on) {
	opacity: 0.35;
}

.ff-bar {
	fill: var(--cs-ink);
}

.ff-node.is-exit .ff-bar {
	fill: var(--cs-muted);
	fill-opacity: 0.55;
}

.ff-node.is-win .ff-bar {
	fill: var(--ff-win);
}

/* Labels keep to ink; a halo in the surface colour lifts them off the bands */
.ff-label {
	pointer-events: none;
	paint-order: stroke;
	stroke: var(--cs-raised);
	stroke-width: 3px;
	stroke-linejoin: round;
}

.ff-name {
	font-family: var(--cs-sans);
	font-size: 12.5px;
	font-weight: 600;
	fill: var(--cs-ink);
}

.ff-value {
	font-family: var(--cs-mono);
	font-size: 11px;
	font-weight: 500;
	fill: var(--cs-muted);
}

.ff-col {
	font-family: var(--cs-mono);
	font-size: 10px;
	font-weight: 500;
	letter-spacing: 0.14em;
	text-transform: uppercase;
	fill: var(--cs-muted);
}

.ff-hit {
	fill: transparent;
	stroke: none;
}

.ff-node:focus-visible .ff-hit {
	stroke: var(--cs-ink);
	stroke-width: 1.5px;
}

.ff-dot {
	fill: var(--cs-ink);
	opacity: 0;
	pointer-events: none;
}

.ff-dot.is-win {
	fill: var(--ff-win);
}

/* ---------- Readout ---------- */
body .ff .ff-readout {
	display: flex;
	flex-wrap: wrap;
	align-items: baseline;
	gap: 0.15rem 0.75rem;
	min-height: 3.4em;
	margin: 0.75rem 0 0;
	padding-top: 0.75rem;
	border-top: 1px solid var(--cs-line);
	font-size: 0.875rem;
	line-height: 1.4;
}

.ff-readout-name {
	font-weight: 600;
	color: var(--cs-ink);
}

.ff-readout-value {
	font-family: var(--cs-mono);
	font-size: 0.78rem;
	color: var(--cs-ink);
}

.ff-readout-note {
	color: var(--cs-muted);
}

@media (max-width: 575.98px) {
	.ff {
		padding: 1.1rem;
	}

	.ff-name {
		font-size: 11.5px;
	}

	.ff-value {
		font-size: 10.5px;
	}
}

@media (prefers-reduced-motion: reduce) {
	.ff-link,
	.ff-node,
	.ff-toggle {
		transition: none;
	}
}