/* ==========================================================================
   Evidence components. Confidentiality-safe artifacts used across case
   studies: process flows, tradeoff tables, decision logs, operating model
   diagrams, quotes, metrics and provenance notes.

   Depends on design-system.css. Deliberately page-agnostic so the articles
   can use these later too.

   Diagrams are built from HTML and CSS rather than hand-positioned SVG text,
   so the copy stays real text: it wraps, it reflows, it is selectable and
   indexable, it survives an edit, and it stays legible on a phone.
   ========================================================================== */

figure {
	margin: 0;
}

/* --- Shared frame --------------------------------------------------------- */

.ev {
	margin-top: var(--s5);
	margin-bottom: var(--s5);
}

.ev-title {
	margin-bottom: var(--s3);
	font-family: var(--font-display);
	font-size: 13px;
	font-weight: 600;
	letter-spacing: 0.12em;
	text-transform: uppercase;
	color: var(--ink-3);
}

.ev-note {
	margin-top: var(--s3);
	font-size: 14px;
	line-height: 1.6;
	color: var(--ink-3);
}

/* --- Process flow --------------------------------------------------------- */

.flow-frame {
	padding: var(--s4);
	border-radius: var(--r-lg);
	background: var(--bg-soft);
	border: 1px solid var(--line-soft);
}

.flow-pair {
	display: grid;
	gap: var(--s3);
}

.lane {
	display: grid;
	grid-template-columns: 132px minmax(0, 1fr);
	align-items: start;
	gap: var(--s3);
}

.lane + .lane {
	margin-top: var(--s3);
	padding-top: var(--s3);
	border-top: 1px dashed var(--line);
}

.lane-label {
	padding-top: 10px;
	font-size: 13px;
	font-weight: 600;
	letter-spacing: 0.06em;
	text-transform: uppercase;
	color: var(--ink-3);
}

/* An <ol> for reading order, but the markers are dropped: the connectors
   already carry sequence, and default markers sit outside the flex boxes. */
.lane-steps {
	display: flex;
	flex-wrap: wrap;
	align-items: stretch;
	gap: 10px;
	margin: 0;
	padding: 0;
	list-style: none;
}

.step {
	position: relative;
	flex: 1 1 150px;
	min-width: 0;
	padding: 12px 14px;
	border-radius: var(--r-sm);
	border: 1px solid var(--line);
	background: #fff;
	font-size: 14px;
	line-height: 1.45;
	color: var(--ink);
}

/* Connector. Sits in the gap, so it never overlaps the next step. */
.step:not(:last-child)::after {
	content: "";
	position: absolute;
	right: -10px;
	top: 50%;
	width: 10px;
	height: 1px;
	background: var(--ink-3);
}

.step:not(:last-child)::before {
	content: "";
	position: absolute;
	right: -10px;
	top: 50%;
	width: 5px;
	height: 5px;
	border-top: 1px solid var(--ink-3);
	border-right: 1px solid var(--ink-3);
	transform: translateY(-50%) rotate(45deg);
	z-index: 1;
}

.step b {
	display: block;
	font-weight: 600;
}

.step span {
	display: block;
	margin-top: 3px;
	font-size: 13px;
	color: var(--ink-3);
}

.step-wait {
	border-color: transparent;
	background: var(--tint-yellow);
}

.step-pain {
	border-color: transparent;
	background: var(--tint-red);
	color: var(--red-ink);
}

.step-pain span {
	color: var(--red-ink);
	opacity: 0.85;
}

.step-win {
	border-color: transparent;
	background: var(--tint-green);
	color: var(--green-ink);
}

.step-win span {
	color: var(--green-ink);
	opacity: 0.85;
}

.step-gate {
	border-style: dashed;
	background: var(--bg-soft);
}

/* Outcome line under a flow */
.flow-out {
	display: flex;
	flex-wrap: wrap;
	align-items: baseline;
	gap: 8px;
	margin-top: var(--s3);
	padding-top: var(--s3);
	border-top: 1px solid var(--line);
	font-size: 14px;
	color: var(--ink-2);
}

.flow-out b {
	color: var(--ink);
}

/* --- Tradeoff matrix ------------------------------------------------------ */

/* Scroll container is focusable so a keyboard user can reach the overflow. */
.matrix-scroll {
	overflow-x: auto;
	border-radius: var(--r-md);
	border: 1px solid var(--line);
}

.matrix {
	width: 100%;
	border-collapse: collapse;
	font-size: 15px;
	min-width: 640px;
}

.matrix th,
.matrix td {
	padding: 14px 16px;
	text-align: left;
	vertical-align: top;
	border-bottom: 1px solid var(--line-soft);
	line-height: 1.5;
}

.matrix thead th {
	font-family: var(--font-text);
	font-size: 12px;
	font-weight: 600;
	letter-spacing: 0.1em;
	text-transform: uppercase;
	color: var(--ink-3);
	background: var(--bg-soft);
	white-space: nowrap;
}

.matrix tbody th {
	font-weight: 600;
	color: var(--ink);
	min-width: 190px;
}

.matrix td {
	color: var(--ink-2);
}

.matrix tbody tr:last-child th,
.matrix tbody tr:last-child td {
	border-bottom: 0;
}

.matrix .is-chosen {
	background: var(--tint-green);
}

.matrix .is-chosen th {
	box-shadow: inset 3px 0 0 var(--green-ink);
}

.verdict {
	display: inline-block;
	padding: 3px 10px;
	border-radius: var(--r-pill);
	font-size: 12px;
	font-weight: 600;
	white-space: nowrap;
}

.verdict-yes {
	background: var(--green-ink);
	color: #fff;
}

.verdict-no {
	background: var(--bg-sink);
	color: var(--ink-3);
}

/* --- Decision log --------------------------------------------------------- */

.decisions {
	display: grid;
	gap: var(--s3);
	counter-reset: decision;
}

.decision {
	position: relative;
	padding: var(--s4);
	padding-left: calc(var(--s4) + 44px);
	border-radius: var(--r-lg);
	border: 1px solid var(--line);
	background: var(--bg);
}

.decision::before {
	counter-increment: decision;
	content: counter(decision, decimal-leading-zero);
	position: absolute;
	left: var(--s4);
	top: var(--s4);
	font-family: var(--font-display);
	font-size: 14px;
	font-weight: 700;
	color: transparent;
	background: var(--grad);
	-webkit-background-clip: text;
	background-clip: text;
}

.decision dl {
	display: grid;
	gap: 10px;
	margin: 0;
}

.decision dt {
	font-size: 11px;
	font-weight: 600;
	letter-spacing: 0.12em;
	text-transform: uppercase;
	color: var(--ink-3);
}

.decision dd {
	margin: 0 0 var(--s2);
	font-size: 15px;
	line-height: 1.6;
	color: var(--ink-2);
}

.decision dd:last-child {
	margin-bottom: 0;
}

.decision .d-call {
	font-size: 17px;
	font-weight: 600;
	color: var(--ink);
}

.decision .d-cost {
	color: var(--red-ink);
}

/* --- Operating model ------------------------------------------------------ */

.model {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
	gap: var(--s3);
	padding: var(--s4);
	border-radius: var(--r-lg);
	background: var(--bg-soft);
	border: 1px solid var(--line-soft);
}

.model-col {
	position: relative;
	display: grid;
	gap: 10px;
	align-content: start;
}

/* Chevron between columns, hidden on the last and when stacked. */
.model-col:not(:last-child)::after {
	content: "";
	position: absolute;
	right: calc(var(--s3) / -2 - 4px);
	top: 42px;
	width: 8px;
	height: 8px;
	border-top: 2px solid var(--ink-3);
	border-right: 2px solid var(--ink-3);
	transform: rotate(45deg);
}

.model-label {
	font-size: 11px;
	font-weight: 600;
	letter-spacing: 0.12em;
	text-transform: uppercase;
	color: var(--ink-3);
}

.node {
	padding: 12px 14px;
	border-radius: var(--r-sm);
	background: #fff;
	border: 1px solid var(--line);
	font-size: 14px;
	line-height: 1.45;
}

.node b {
	display: block;
	font-weight: 600;
	color: var(--ink);
}

.node span {
	display: block;
	margin-top: 3px;
	font-size: 13px;
	color: var(--ink-3);
}

.node-key {
	border-color: transparent;
	background: var(--tint-blue);
}

.node-key b {
	color: var(--blue-ink);
}

/* --- Metrics -------------------------------------------------------------- */

.metrics {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
	gap: var(--s3);
}

.metric {
	padding: var(--s4);
	border-radius: var(--r-lg);
	border: 1px solid var(--line);
	border-top: 3px solid var(--accent, var(--blue-ink));
}

.metric-num {
	font-family: var(--font-display);
	font-size: clamp(30px, 3.4vw, 40px);
	font-weight: 600;
	letter-spacing: -0.03em;
	line-height: 1.05;
	color: var(--accent, var(--ink));
}

.metric-label {
	margin-top: 10px;
	font-size: 15px;
	font-weight: 500;
	line-height: 1.45;
	color: var(--ink);
}

/* Provenance. Styled small and muted so an unsourced number looks wrong. */
.metric-source {
	margin-top: 10px;
	font-size: 13px;
	line-height: 1.5;
	color: var(--ink-3);
}

/* --- Evidence bands ------------------------------------------------------- */

/* Measured / Observed / Too early to claim. All three always render, so an
   empty band is visible rather than quietly omitted. */
.bands {
	display: grid;
	gap: var(--s3);
}

.band {
	display: grid;
	grid-template-columns: 168px minmax(0, 1fr);
	gap: var(--s3);
	padding: var(--s3) 0;
	border-top: 1px solid var(--line);
}

.band-label {
	display: flex;
	align-items: center;
	gap: 8px;
	font-size: 13px;
	font-weight: 600;
	letter-spacing: 0.06em;
	text-transform: uppercase;
	color: var(--ink-3);
}

.band-label::before {
	content: "";
	width: 8px;
	height: 8px;
	border-radius: 50%;
	background: var(--ink-3);
	flex: 0 0 auto;
}

.band-measured .band-label::before {
	background: var(--green-ink);
}

.band-observed .band-label::before {
	background: var(--blue-ink);
}

.band-early .band-label::before {
	background: var(--yellow-ink);
}

.band p {
	margin-bottom: 10px;
	font-size: 16px;
	line-height: 1.65;
	color: var(--ink-2);
}

.band p:last-child {
	margin-bottom: 0;
}

/* --- Measure note and callouts -------------------------------------------- */

.measure-note {
	margin-top: var(--s3);
	padding: var(--s3) var(--s4);
	border-radius: var(--r-md);
	background: var(--bg-soft);
	border-left: 3px solid var(--blue-ink);
}

.measure-note-label {
	margin-bottom: 6px;
	font-size: 12px;
	font-weight: 600;
	letter-spacing: 0.1em;
	text-transform: uppercase;
	color: var(--blue-ink);
}

.measure-note p {
	font-size: 14.5px;
	line-height: 1.6;
	color: var(--ink-2);
}

.callout {
	display: flex;
	gap: 12px;
	margin-top: var(--s4);
	padding: var(--s3) var(--s4);
	border-radius: var(--r-md);
	background: var(--tint-blue);
	font-size: 14.5px;
	line-height: 1.6;
	color: var(--ink-2);
}

.callout svg {
	flex: 0 0 auto;
	margin-top: 2px;
	color: var(--blue-ink);
}

/* --- Voices --------------------------------------------------------------- */

.voices {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
	gap: var(--s3);
}

.voice {
	display: grid;
	align-content: start;
	gap: 12px;
	padding: var(--s4);
	border-radius: var(--r-lg);
	border: 1px solid var(--line);
	background: var(--bg);
}

.voice blockquote {
	margin: 0;
	font-size: 15px;
	line-height: 1.65;
	color: var(--ink);
}

.voice figcaption {
	font-size: 13px;
	font-weight: 600;
	color: var(--ink-3);
}

/* --- Responsive ----------------------------------------------------------- */

@media (max-width: 860px) {

	/* Lanes stack: the label moves above its steps and the steps run down the
	   page, so the connector has to turn ninety degrees with them. */
	.lane {
		grid-template-columns: 1fr;
		gap: var(--s2);
	}

	.lane-label {
		padding-top: 0;
	}

	.lane-steps {
		flex-direction: column;
	}

	.step {
		flex: 0 0 auto;
	}

	.step:not(:last-child)::after {
		right: auto;
		left: 24px;
		top: auto;
		bottom: -10px;
		width: 1px;
		height: 10px;
	}

	.step:not(:last-child)::before {
		right: auto;
		left: 22px;
		top: auto;
		bottom: -8px;
		transform: rotate(135deg);
	}

	.model-col:not(:last-child)::after {
		right: auto;
		left: 24px;
		top: auto;
		bottom: calc(var(--s3) / -2 - 6px);
		transform: rotate(135deg);
	}

	.band {
		grid-template-columns: 1fr;
		gap: 8px;
	}
}