.hero--lower > div {
	max-width: 820px;
	margin: auto;
}

/* =============================================================
   ACADEMYT CASE STUDY
   ============================================================= */

/* Hero */
.cs-hero {
	padding-block: clamp(72px, 10vw, 120px) clamp(56px, 7vw, 96px);
}

.cs-hero__head {
	max-width: 760px;
	margin: 0 auto 56px;
	text-align: center;
}

.cs-hero__head h1 {
	margin: 16px 0 0;
	font-family: "Newsreader", Georgia, serif;
	font-size: clamp(2.8rem, 5.5vw, 4.5rem);
	line-height: 0.97;
	letter-spacing: -0.05em;
	font-weight: 500;
	color: var(--text);
}

.cs-hero__sub {
	margin: 24px 0 0;
	font-size: clamp(1rem, 1.6vw, 1.2rem);
	line-height: 1.75;
	color: var(--muted);
}

/* 3-column card row */
.cs-cards-row {
	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	gap: 20px;
}

/* Base card */
.cs-card {
	padding: 28px;
	border-radius: var(--radius);
	border: 1px solid var(--line-strong);
	background: var(--surface);
	display: grid;
	gap: 10px;
	align-content: start;
	backdrop-filter: blur(6px);
}

.cs-card__num {
	font-size: 0.72rem;
	font-weight: 700;
	letter-spacing: 0.12em;
	text-transform: uppercase;
	color: var(--accent);
}

.cs-card__title {
	margin: 0;
	font-size: 1rem;
	font-weight: 700;
	color: var(--text);
	line-height: 1.3;
}

.cs-card__body {
	margin: 0;
	font-size: 1rem;
	line-height: 1.7;
	color: var(--muted);
}

.cs-card__body + .cs-card__body {
	margin-top: 10px;
}

.cs-card__list {
	margin: 6px 0 0;
	padding-left: 16px;
	display: grid;
	gap: 5px;
}

.cs-card__list li {
	font-size: 1rem;
	line-height: 1.6;
	color: var(--muted);
}

/* Accent (inverted) card — used for Core question */
.cs-card--accent {
	background: var(--accent);
	border-color: var(--accent);
}

.cs-card--accent .cs-card__title {
	color: #fafafa;
}

.cs-card__body--light,
.cs-card__list--light,
.cs-card__list--light li {
	color: rgba(250, 250, 250, 0.88);
}

/* Section base */
.cs-section {
	padding-block: clamp(56px, 7vw, 96px);
}

.cs-section__head {
	margin-bottom: 52px;
}

/* Body copy used in split sections */
.cs-body {
	margin: 16px 0 0;
	font-size: 1rem;
	line-height: 1.75;
	color: var(--muted);
}

/* =============================================================
   SPLIT layout — image/visual left, content right
   Used by: Architectural approach, Workflow implementation
   ============================================================= */
.cs-section--split {
	display: grid;
	grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
	gap: 72px;
	align-items: center;
}

.cs-split__content .section-heading {
	margin-bottom: 8px;
}

/* =============================================================
   BACKBONE layout — heading left, 2×2 cards right
   Used by: Operational backbone, System logic
   ============================================================= */
.cs-section--backbone {
	display: grid;
	grid-template-columns: minmax(0, 1fr) minmax(0, 1.5fr);
	gap: 72px;
	align-items: start;
}

.cs-backbone__heading .section-heading {
	margin-bottom: 0;
}

.cs-backbone__cards {
	display: grid;
	grid-template-columns: repeat(1, minmax(0, 1fr));
	gap: 16px;
}

/* =============================================================
   DECISIONS layout — centered heading + 3 cols
   ============================================================= */
.cs-section--decisions {
	display: block;
}

.cs-section__head--centered {
	text-align: center;
	max-width: 800px;
	margin-inline: auto;
	margin-bottom: 52px;
}

.cs-case-grid {
	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	gap: 20px;
}

.cs-card--decision {
	align-content: start;
}

/* =============================================================
   DIAGRAMS
   ============================================================= */
.cs-diagram {
	background: var(--surface);
	border: 1px solid var(--line-strong);
	border-radius: calc(var(--radius) * 1.5);
	padding: 28px;
	backdrop-filter: blur(6px);
}

.cs-diagram__label {
	margin: 0 0 12px;
	font-size: 1rem;
	font-weight: 700;
	letter-spacing: 0.12em;
	text-transform: uppercase;
	color: var(--muted);
}

.cs-diagram__label--accent {
	color: var(--accent);
}

.cs-diagram__sublabel {
	margin: 8px 0 0;
	font-size: 0.8rem;
	line-height: 1.5;
	color: var(--muted);
	font-style: italic;
}

.cs-diagram__divider {
	height: 1px;
	background: var(--line);
	margin: 20px 0;
}

/* Linear flow */
.cs-diagram__flow--linear {
	display: flex;
	align-items: center;
	gap: 6px;
	flex-wrap: wrap;
}

.cs-d-step {
	padding: 7px 12px;
	border: 1px solid var(--line-strong);
	border-radius: var(--radius);
	font-size: 0.82rem;
	color: var(--muted);
	background: var(--bg);
}

.cs-d-step--danger {
	border-color: rgba(231, 76, 60, 0.3);
	color: var(--accent);
}

.cs-d-arrow {
	font-size: 0.82rem;
	color: var(--muted);
}

/* State flow */
.cs-diagram__flow--state {
	display: grid;
	gap: 0;
}

.cs-d-state {
	padding: 9px 14px;
	border: 1px solid var(--line-strong);
	border-radius: var(--radius);
	font-size: 1rem;
	color: var(--text);
	background: var(--bg);
	font-weight: 600;
}

.cs-d-state--gate {
	border-color: var(--accent);
	background: var(--accent-soft);
	color: var(--accent);
}

.cs-d-connector {
	display: flex;
	gap: 16px;
	padding: 4px 14px;
	align-items: center;
}

.cs-d-connector__yes {
	font-size: 0.78rem;
	font-weight: 700;
	color: var(--accent);
}

.cs-d-connector__no {
	font-size: 0.75rem;
	color: var(--muted);
	font-style: italic;
}

/* Workflow flow diagram */
.cs-diagram--flow {
	display: grid;
	gap: 0;
}

.cs-flow-step {
	display: flex;
	align-items: center;
	gap: 14px;
	padding: 12px 16px;
	border: 1px solid var(--line-strong);
	border-radius: var(--radius);
	background: var(--bg);
}

.cs-flow-connector {
	width: 2px;
	height: 14px;
	background: linear-gradient(180deg, var(--accent), rgba(231, 76, 60, 0.3));
	margin-left: 24px;
}

.cs-flow-step__num {
	width: 30px;
	height: 30px;
	border-radius: 50%;
	background: var(--accent-soft);
	color: var(--accent);
	font-size: 0.75rem;
	font-weight: 700;
	display: flex;
	align-items: center;
	justify-content: center;
	flex-shrink: 0;
}

.cs-flow-step__content {
	display: grid;
	gap: 2px;
}

.cs-flow-step__label {
	font-size: 0.88rem;
	font-weight: 700;
	color: var(--text);
	letter-spacing: -0.01em;
}

.cs-flow-step__sub {
	font-size: 0.75rem;
	color: var(--muted);
	line-height: 1.4;
}

.cs-flow-step--final {
	border-color: var(--accent);
	background: var(--accent-soft);
}

.cs-flow-step--final .cs-flow-step__num {
	background: var(--accent);
	color: #fafafa;
}

.cs-flow-step--final .cs-flow-step__label {
	color: var(--accent);
}

/* =============================================================
   STATE CARDS (System logic section)
   ============================================================= */
.cs-card__badge {
	display: inline-flex;
	padding: 3px 10px;
	border-radius: 999px;
	font-size: 0.69rem;
	font-weight: 700;
	letter-spacing: 0.1em;
	text-transform: uppercase;
	background: var(--accent-soft);
	color: var(--accent);
	width: fit-content;
}

/* State chain card — spans full width */
.cs-card--state-flow {
	grid-column: 1 / -1;
	background: #111111;
	border-color: #111111;
	padding: 24px 28px;
	gap: 14px;
}

.cs-card__flow-label {
	margin: 0;
	font-size: 0.72rem;
	font-weight: 700;
	letter-spacing: 0.12em;
	text-transform: uppercase;
	color: rgba(250, 250, 250, 0.4);
}

.cs-state-chain {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 8px;
}

.cs-state-node {
	padding: 5px 12px;
	border: 1px solid rgba(250, 250, 250, 0.14);
	border-radius: var(--radius);
	font-size: 0.8rem;
	font-weight: 600;
	color: rgba(250, 250, 250, 0.7);
	background: rgba(255, 255, 255, 0.04);
}

.cs-state-node--final {
	border-color: rgba(231, 76, 60, 0.5);
	color: rgba(231, 76, 60, 0.9);
	background: rgba(231, 76, 60, 0.08);
}

.cs-state-arrow {
	font-size: 0.75rem;
	color: rgba(250, 250, 250, 0.24);
}

/* =============================================================
   RESULTS
   ============================================================= */
.cs-result__stat {
	display: block;
	font-family: "Newsreader", Georgia, serif;
	font-size: clamp(2.2rem, 4vw, 3rem);
	font-weight: 500;
	letter-spacing: -0.05em;
	line-height: 1;
	color: var(--text);
	margin-bottom: 4px;
}

.cs-card--result-accent .cs-result__stat {
	color: var(--accent);
}

/* =============================================================
   GOVERNANCE
   ============================================================= */
.cs-card--gov .cs-card__list li strong {
	color: var(--text);
}

/* =============================================================
   OBSERVABILITY
   ============================================================= */
.cs-obs-list {
	display: grid;
	gap: 16px;
	margin-top: 4px;
}

.cs-obs-item {
	display: flex;
	gap: 12px;
	align-items: flex-start;
}

.cs-obs-item__dot {
	flex-shrink: 0;
	width: 8px;
	height: 8px;
	border-radius: 50%;
	margin-top: 6px;
}

.cs-obs-item--ok .cs-obs-item__dot {
	background: #22c55e;
}

.cs-obs-item--warn .cs-obs-item__dot {
	background: rgba(231, 76, 60, 0.6);
}

.cs-obs-item p,
.cs-obs-item strong {
	margin: 0;
	font-size: 0.9rem;
	line-height: 1.6;
}

.cs-obs-item strong {
	display: block;
	color: var(--text);
	font-size: 0.88rem;
	margin-bottom: 2px;
}

.cs-card--obs {
	height: 100%;
}

.cs-card--obs-limits {
	border-color: rgba(231, 76, 60, 0.18);
	background: rgba(231, 76, 60, 0.03);
}

/* =============================================================
   ROADMAP (Next phase)
   ============================================================= */
.cs-card--roadmap-accent {
	background: var(--text);
	border-color: var(--text);
}

.cs-card--roadmap-accent .cs-card__num {
	color: rgba(250, 250, 250, 0.5);
}

.cs-card--roadmap-accent .cs-card__title {
	color: #fafafa;
}

.cs-card--roadmap-accent .cs-card__body {
	color: rgba(250, 250, 250, 0.7);
}

/* =============================================================
   TRANSFERABLE PATTERN
   ============================================================= */
.cs-pattern-steps {
	display: grid;
	gap: 0;
	margin-top: 28px;
	border: 1px solid var(--line-strong);
	border-radius: var(--radius);
	overflow: hidden;
}

.cs-pattern-step {
	display: flex;
	align-items: center;
	gap: 12px;
	padding: 10px 16px;
	font-size: 0.88rem;
	font-weight: 600;
	color: var(--muted);
	border-bottom: 1px solid var(--line);
}

.cs-pattern-step--last {
	border-bottom: none;
}

.cs-pattern-step span {
	width: 22px;
	height: 22px;
	border-radius: 50%;
	background: var(--accent-soft);
	color: var(--accent);
	font-size: 0.72rem;
	font-weight: 700;
	display: flex;
	align-items: center;
	justify-content: center;
	flex-shrink: 0;
}

.cs-pattern-note {
	margin: 14px 0 0;
	font-size: 0.85rem;
	font-style: italic;
	color: var(--muted);
}

/* =============================================================
   TAKEAWAY
   ============================================================= */
.cs-section--takeaway {
	background: var(--text);
	width: 100vw;
	margin-inline: calc(50% - 50vw);
}

.cs-takeaway__inner {
	max-width: var(--content-width);
	margin-inline: auto;
	padding-right: 24px;
	padding-left: 24px;
}

.cs-section--takeaway .section-label {
	color: rgba(250, 250, 250, 0.4);
}

.cs-takeaway__quote {
	margin: 0 0 56px;
	font-family: "Newsreader", Georgia, serif;
	font-size: clamp(2rem, 4vw, 3.2rem);
	line-height: 1.1;
	letter-spacing: -0.04em;
	font-weight: 500;
	color: #fafafa;
	max-width: 820px;
	border: none;
	padding: 0;
}

.cs-takeaway__skills {
	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	gap: 1px;
	background: rgba(250, 250, 250, 0.08);
	border: 1px solid rgba(250, 250, 250, 0.08);
	border-radius: var(--radius);
	overflow: hidden;
}

.cs-takeaway__skill {
	padding: 24px;
	background: var(--text);
	display: grid;
	gap: 8px;
	align-content: start;
}

.cs-takeaway__skill strong {
	font-size: 0.92rem;
	font-weight: 700;
	color: #fafafa;
	letter-spacing: -0.01em;
}

.cs-takeaway__skill p {
	margin: 0;
	font-size: 0.88rem;
	line-height: 1.65;
	color: rgba(250, 250, 250, 0.55);
}

/* =============================================================
   RESPONSIVE
   ============================================================= */
@media (max-width: 960px) {
	.cs-section--split,
	.cs-section--backbone {
		grid-template-columns: 1fr;
		gap: 48px;
	}

	/* Next phase: 2 cols on tablet */
	.cs-next-phase-grid {
		grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
	}

	/* Architecture decisions: 2 cols on tablet */
	.cs-arch-decisions-grid {
		grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
	}

	/* System design: reorder to text first */
	.cs-system-design-split {
		display: grid;
		grid-template-columns: 1fr;
	}

	.cs-system-design-content {
		order: -1;
	}
}

@media (max-width: 720px) {
	.cs-cards-row,
	.cs-case-grid {
		grid-template-columns: 1fr;
	}

	.cs-backbone__cards {
		grid-template-columns: 1fr;
	}

	.cs-state-chain {
		flex-direction: column;
		align-items: flex-start;
	}

	.cs-state-arrow {
		transform: rotate(90deg);
		padding-left: 12px;
	}

	.cs-takeaway__skills {
		grid-template-columns: 1fr;
	}

	/* Next phase: 1 col on mobile */
	.cs-next-phase-grid {
		grid-template-columns: 1fr !important;
	}

	/* Architecture decisions: 1 col on mobile */
	.cs-arch-decisions-grid {
		grid-template-columns: 1fr !important;
	}
}

@media (max-width: 480px) {
	/* Mobile overrides if needed */
	.cs-next-phase-grid {
		grid-template-columns: 1fr !important;
	}

	.cs-arch-decisions-grid {
		grid-template-columns: 1fr !important;
	}
}