/* =============================================
   CASE STUDY — Hero
============================================= */
.cs-hero {
  background: var(--near-black);
  padding: calc(72px + 3rem) 0 3.5rem;
  position: relative;
  overflow: hidden;
}

.cs-hero-blob {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}

/* Per-page blob colors set via modifier class in each HTML file */
.cs-hero-blob--1 {
  top: -80px; right: -80px;
  width: 360px; height: 360px;
  opacity: 0.08;
}

.cs-hero-blob--sage   { background: var(--sage); }
.cs-hero-blob--indigo { background: var(--indigo); }
.cs-hero-blob--terra  { background: var(--terracotta); }

.cs-hero-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--content-pad);
  position: relative;
  z-index: 1;
}

.cs-hero-eyebrow {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.cs-hero-title {
  color: #fff;
  margin-bottom: 1rem;
  max-width: 820px;
}

.cs-hero-subtitle {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(1.125rem, 2.5vw, 1.5rem);
  color: rgba(255,255,255,0.65);
  margin-bottom: 2rem;
}

.cs-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.1);
}

.cs-meta-item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding-right: 2rem;
  border-right: 1px solid rgba(255,255,255,0.1);
}
.cs-meta-item:last-child { border-right: none; }

.cs-meta-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.45);
}

.cs-meta-value {
  font-size: var(--text-base);
  font-weight: 400;
  color: rgba(255,255,255,0.88);
  line-height: 1.4;
}

/* =============================================
   CASE STUDY — Metrics Bar
============================================= */
.cs-metrics {
  padding: 2.5rem 0;
}

.cs-metrics--sage   { background: var(--sage-dark); }
.cs-metrics--indigo { background: var(--indigo); }
.cs-metrics--terra  { background: var(--terracotta); }

.cs-metrics-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--content-pad);
  display: flex;
  flex-wrap: wrap;
  gap: 0;
}

.cs-metric {
  flex: 1 1 180px;
  padding: 0 2rem 0 0;
  margin-right: 2rem;
  border-right: 1px solid rgba(255,255,255,0.2);
}
.cs-metric:last-child {
  border-right: none;
  margin-right: 0;
  padding-right: 0;
}

.cs-metric-value {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  color: #fff;
  line-height: 1.1;
  margin-bottom: 0.25rem;
}

.cs-metric-label {
  font-size: var(--text-sm);
  font-weight: 400;
  color: rgba(255,255,255,0.78);
  line-height: 1.5;
}

/* =============================================
   CASE STUDY — Body Layout
============================================= */
.cs-body {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--content-pad);
}

/* ── Sage theme (CS1) ── */
.cs-body--sage .cs-hero-eyebrow,
.cs-body--sage .cs-section-eyebrow       { color: var(--sage-dark); }
.cs-body--sage .cs-sub-heading           { color: var(--sage-dark); }
.cs-body--sage .cs-callout               { border-color: var(--sage); background: var(--sage-light); }
.cs-body--sage .cs-callout p             { color: var(--sage-dark); }
.cs-body--sage .cs-info-card-label       { color: var(--sage-dark); }
.cs-body--sage .cs-atomic-example-key   { color: var(--sage-dark); }
.cs-body--sage .cs-persona-avatar        { background: var(--sage); }
.cs-body--sage .cs-persona-col-label     { color: var(--sage-dark); }
.cs-body--sage .cs-persona-quote         { background: var(--sage-light); }
.cs-body--sage .cs-persona-quote blockquote { color: var(--sage-dark); }
.cs-body--sage .cs-loop-label            { color: var(--sage-dark); }
.cs-body--sage .cs-learnings-arrow       { color: var(--sage); }
.cs-body--sage .cs-checklist-icon        { background: var(--sage-light); }
.cs-body--sage .cs-checklist-icon i      { color: var(--sage-dark); }

/* ── Indigo theme (CS2) ── */
.cs-body--indigo .cs-hero-eyebrow,
.cs-body--indigo .cs-section-eyebrow     { color: var(--indigo); }
.cs-body--indigo .cs-sub-heading         { color: var(--indigo); }
.cs-body--indigo .cs-callout             { border-color: var(--indigo); background: var(--indigo-light); }
.cs-body--indigo .cs-callout p           { color: var(--indigo); }
.cs-body--indigo .cs-info-card-label     { color: var(--indigo); }
.cs-body--indigo .cs-atomic-example-key { color: var(--indigo); }
.cs-body--indigo .cs-persona-avatar      { background: var(--indigo); }
.cs-body--indigo .cs-persona-col-label   { color: var(--indigo); }
.cs-body--indigo .cs-persona-quote       { background: var(--indigo-light); }
.cs-body--indigo .cs-persona-quote blockquote { color: var(--indigo); }
.cs-body--indigo .cs-loop-label          { color: var(--indigo); }
.cs-body--indigo .cs-learnings-arrow     { color: var(--indigo); }
.cs-body--indigo .cs-checklist-icon      { background: var(--indigo-light); }
.cs-body--indigo .cs-checklist-icon i    { color: var(--indigo); }

/* ── Terracotta theme (CS3) ── */
.cs-body--terra .cs-hero-eyebrow,
.cs-body--terra .cs-section-eyebrow      { color: var(--terracotta); }
.cs-body--terra .cs-sub-heading          { color: #9A5040; }
.cs-body--terra .cs-callout              { border-color: var(--terracotta); background: var(--terracotta-light); }
.cs-body--terra .cs-callout p            { color: #9A5040; }
.cs-body--terra .cs-info-card-label      { color: var(--terracotta); }
.cs-body--terra .cs-atomic-example-key  { color: var(--terracotta); }
.cs-body--terra .cs-persona-avatar       { background: var(--terracotta); }
.cs-body--terra .cs-persona-col-label    { color: var(--terracotta); }
.cs-body--terra .cs-persona-quote        { background: var(--terracotta-light); }
.cs-body--terra .cs-persona-quote blockquote { color: #9A5040; }
.cs-body--terra .cs-loop-label           { color: var(--terracotta); }
.cs-body--terra .cs-learnings-arrow      { color: var(--terracotta); }
.cs-body--terra .cs-checklist-icon       { background: var(--terracotta-light); }
.cs-body--terra .cs-checklist-icon i     { color: #9A5040; }

.cs-section {
  padding: 4rem 0;
  border-bottom: 1px solid var(--border);
}
.cs-section:first-of-type { border-top: 1px solid var(--border); }

.cs-section-eyebrow {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 0.625rem;
}

.cs-section-heading {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 400;
  color: var(--text-primary);
  line-height: 1.15;
  letter-spacing: -0.015em;
  margin-bottom: 0.5rem;
}

.cs-section-subheading {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-muted);
  margin-bottom: 2rem;
}

/* Two-column layout */
.cs-two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}

/* =============================================
   CASE STUDY — Prose
============================================= */
.cs-prose p {
  font-size: var(--text-base);
  font-weight: 300;
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 1.25rem;
  max-width: 680px;
}
.cs-prose p:last-child { margin-bottom: 0; }

.cs-prose strong {
  font-weight: 600;
  color: var(--text-primary);
}

.cs-sub-heading {
  font-family: var(--font-display);
  font-size: clamp(1.125rem, 2vw, 1.375rem);
  font-weight: 400;
  color: var(--text-primary);
  line-height: 1.25;
  margin-top: 2rem;
  margin-bottom: 1rem;
}

/* =============================================
   CASE STUDY — Callout
   Per-page border/background colors set in HTML
   via inline style or a theme class on .cs-body
============================================= */
.cs-callout {
  border-left: 3px solid;
  padding: 1rem 1.5rem;
  margin: 1.75rem 0;
  border-radius: 0 4px 4px 0;
}

.cs-callout p {
  font-size: var(--text-base);
  font-weight: 400;
  line-height: 1.7;
  margin: 0;
}

/* Per-page callout themes */
.cs-callout--sage   { border-color: var(--sage);       background: var(--sage-light); }
.cs-callout--sage p { color: var(--sage-dark); }

.cs-callout--indigo   { border-color: var(--indigo);     background: var(--indigo-light); }
.cs-callout--indigo p { color: var(--indigo); }

.cs-callout--terra   { border-color: var(--terracotta); background: var(--terracotta-light); }
.cs-callout--terra p { color: #9A5040; }

/* =============================================
   CASE STUDY — Tables
============================================= */
.cs-table-wrap {
  overflow-x: auto;
  margin: 1.75rem 0;
  border-radius: 4px;
  border: 1px solid var(--border);
}

.cs-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-base);
}

.cs-table thead {
  background: var(--near-black);
}

.cs-table thead th {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.78);
  padding: 0.875rem 1.25rem;
  text-align: left;
}

.cs-table tbody tr {
  border-top: 1px solid var(--border);
}
.cs-table tbody tr:nth-child(even) {
  background: rgba(28,28,28,0.03);
}

.cs-table tbody th,
.cs-table tbody td {
  padding: 0.875rem 1.25rem;
  font-size: var(--text-base);
  font-weight: 300;
  color: var(--text-secondary);
  vertical-align: top;
  line-height: 1.6;
  text-align: left;
}

.cs-table tbody th {
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
}

/* =============================================
   CASE STUDY — Badge / Priority chips
============================================= */
.cs-priority {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.2rem 0.6rem;
  border-radius: 100px;
}

/* CS1 (sage) — none needed */
/* CS2 (indigo) priority */
.cs-priority--p1 { background: var(--indigo-light); color: var(--indigo); }
.cs-priority--p2 { background: rgba(28,28,28,0.07); color: var(--text-primary); }
.cs-priority--p3 { background: rgba(28,28,28,0.04); color: var(--text-muted); }

/* CS3 (terra) stakeholder priority */
.cs-priority--high   { background: var(--terracotta-light); color: #9A5040; }
.cs-priority--medium { background: rgba(28,28,28,0.07);     color: var(--text-primary); }

/* CS2 QA pass badge */
.cs-pass {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.2rem 0.6rem;
  border-radius: 100px;
  background: #E6F4EA;
  color: #2D6A3F;
}

/* =============================================
   CASE STUDY — Card Grids
============================================= */
.cs-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
  margin: 1.75rem 0;
}

.cs-card-grid--3 {
  grid-template-columns: repeat(3, 1fr);
}

.cs-info-card {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1.25rem;
  background: #fff;
}

.cs-info-card-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.cs-info-card p {
  font-size: var(--text-base);
  font-weight: 300;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* =============================================
   CASE STUDY — Atomic Flow (4-step)
============================================= */
.cs-atomic-flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin: 1.75rem 0;
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}

.cs-atomic-step {
  padding: 1.25rem;
  border-right: 1px solid var(--border);
}
.cs-atomic-step:last-child { border-right: none; }

.cs-atomic-step-num {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.375rem;
}

.cs-atomic-step-title {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.375rem;
}

.cs-atomic-step p {
  font-size: var(--text-sm);
  font-weight: 300;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* =============================================
   CASE STUDY — Atomic Examples (3-col grid)
============================================= */
.cs-atomic-examples {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin: 1.75rem 0;
}

.cs-atomic-example {
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}

.cs-atomic-example-row {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  display: grid;
  grid-template-columns: minmax(130px, auto) 1fr;
  gap: 0.75rem;
  align-items: start;
}
.cs-atomic-example-row:last-child { border-bottom: none; }

.cs-atomic-example-key {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding-top: 0.125rem;
}

.cs-atomic-example-val {
  font-size: var(--text-sm);
  font-weight: 300;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* =============================================
   CASE STUDY — Persona Card
============================================= */
.cs-persona {
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  margin: 1.75rem 0;
  background: #fff;
}

.cs-persona-header {
  background: var(--near-black);
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.cs-persona-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: #fff;
}

.cs-persona-name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: #fff;
  line-height: 1.2;
}

.cs-persona-role {
  font-size: var(--text-sm);
  font-weight: 300;
  color: rgba(255,255,255,0.6);
}

.cs-persona-body {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--border);
}

.cs-persona-col {
  padding: 1.25rem 1.5rem;
  border-right: 1px solid var(--border);
}
.cs-persona-col:last-child { border-right: none; }

.cs-persona-col-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.cs-persona-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.cs-persona-col li {
  font-size: var(--text-sm);
  font-weight: 300;
  color: var(--text-secondary);
  line-height: 1.55;
}

.cs-persona-quote {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border);
}

.cs-persona-quote blockquote {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--text-base);
  line-height: 1.65;
}

/* =============================================
   CASE STUDY — Audit Snapshot (CS2)
============================================= */
.cs-audit-list {
  list-style: none;
  margin: 1.75rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.cs-audit-item {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 1rem;
  align-items: start;
  padding: 1rem 1.25rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
}

.cs-audit-severity {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.25rem 0.625rem;
  border-radius: 100px;
  text-align: center;
}
.cs-audit-severity--critical { background: #FDE8E8; color: #8B1A1A; }
.cs-audit-severity--high     { background: var(--indigo-light); color: var(--indigo); }

.cs-audit-component {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.2rem;
}

.cs-audit-detail {
  font-size: var(--text-sm);
  font-weight: 300;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* =============================================
   CASE STUDY — Trade-Off Matrix (CS2)
============================================= */
.cs-tradeoff-list {
  list-style: none;
  margin: 1.75rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.cs-tradeoff-item {
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  background: #fff;
}

.cs-tradeoff-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.875rem 1.25rem;
  border-bottom: 1px solid var(--border);
  background: rgba(28,28,28,0.02);
}

.cs-tradeoff-badge {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.2rem 0.6rem;
  border-radius: 100px;
  flex-shrink: 0;
}
.cs-tradeoff-badge--preferred    { background: var(--indigo-light); color: var(--indigo); }
.cs-tradeoff-badge--supplemental { background: rgba(28,28,28,0.07); color: var(--text-primary); }
.cs-tradeoff-badge--rejected     { background: #FDE8E8; color: #8B1A1A; }

.cs-tradeoff-name {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--text-primary);
}

.cs-tradeoff-body {
  padding: 0.875rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.cs-tradeoff-row {
  font-size: var(--text-sm);
  font-weight: 300;
  color: var(--text-secondary);
  line-height: 1.6;
  display: flex;
  gap: 0.5rem;
}

.cs-tradeoff-pro { color: var(--sage-dark); font-weight: 600; flex-shrink: 0; }
.cs-tradeoff-con { color: #8B4444;          font-weight: 600; flex-shrink: 0; }

/* =============================================
   CASE STUDY — Cascade (CS2)
============================================= */
.cs-cascade {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0;
  margin: 1.75rem 0;
}

.cs-cascade-step {
  flex: 1 1 140px;
  text-align: center;
  padding: 1.5rem 1rem;
  border: 1px solid var(--border);
  border-right: none;
  background: #fff;
}
.cs-cascade-step:first-child { border-radius: 6px 0 0 6px; }
.cs-cascade-step:last-child  { border-right: 1px solid var(--border); border-radius: 0 6px 6px 0; }

.cs-cascade-value {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--indigo);
  margin-bottom: 0.375rem;
  line-height: 1.2;
}

.cs-cascade-label {
  font-size: var(--text-sm);
  font-weight: 400;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* =============================================
   CASE STUDY — Training Timeline (CS1)
============================================= */
.cs-timeline {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin: 1.75rem 0;
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}

.cs-timeline-phase {
  padding: 1.5rem;
  border-right: 1px solid var(--border);
}
.cs-timeline-phase:last-child { border-right: none; }

.cs-timeline-phase-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--sage-dark);
  margin-bottom: 1rem;
}

.cs-timeline-row { margin-bottom: 0.625rem; }

.cs-timeline-row-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.2rem;
}

.cs-timeline-row-value {
  font-size: var(--text-base);
  font-weight: 400;
  color: var(--text-primary);
  line-height: 1.5;
}

/* =============================================
   CASE STUDY — Adoption Flow (CS1)
============================================= */
.cs-adoption-flow {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0;
  margin: 1.75rem 0;
}

.cs-adoption-step {
  flex: 1 1 160px;
  text-align: center;
  padding: 1.5rem 1rem;
  border: 1px solid var(--border);
  border-right: none;
  background: #fff;
}
.cs-adoption-step:first-child { border-radius: 6px 0 0 6px; }
.cs-adoption-step:last-child  { border-right: 1px solid var(--border); border-radius: 0 6px 6px 0; }

.cs-adoption-value {
  font-family: var(--font-display);
  font-size: clamp(1.375rem, 3vw, 2rem);
  color: var(--sage-dark);
  margin-bottom: 0.375rem;
}

.cs-adoption-label {
  font-size: var(--text-sm);
  font-weight: 400;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* =============================================
   CASE STUDY — Language Change Callout (CS1)
============================================= */
.cs-language-change {
  margin: 1.75rem 0;
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
}

.cs-language-change-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-top: 1rem;
}

.cs-language-col-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.625rem;
}
.cs-language-col-label--before { color: var(--text-muted); }
.cs-language-col-label--after  { color: var(--sage-dark); }

.cs-language-change ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.cs-language-change li {
  font-size: var(--text-base);
  font-weight: 300;
  color: var(--text-secondary);
  line-height: 1.6;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.cs-lang-x     { color: #B44;           font-weight: 600; }
.cs-lang-check { color: var(--sage-dark); font-weight: 600; }

/* =============================================
   CASE STUDY — Discovery Themes List (CS3)
============================================= */
.cs-theme-list {
  list-style: none;
  margin: 1.75rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.cs-theme-item {
  display: flex;
  align-items: flex-start;
  gap: 0.875rem;
  padding: 1rem 1.25rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
}

.cs-theme-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--terracotta-mid);
  flex-shrink: 0;
  margin-top: 7px;
}

.cs-theme-title {
  font-weight: 600;
  color: var(--text-primary);
}

.cs-theme-item p {
  font-size: var(--text-base);
  font-weight: 300;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* =============================================
   CASE STUDY — State Grid / Compare Grid (CS3)
============================================= */
.cs-state-grid,
.cs-compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1.75rem 0;
}

.cs-state-col,
.cs-compare-col {
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}

.cs-state-col-header,
.cs-compare-col-header {
  padding: 0.75rem 1.25rem;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.cs-state-col--before .cs-state-col-header,
.cs-compare-col--before .cs-compare-col-header {
  background: rgba(28,28,28,0.06);
  color: var(--text-muted);
}

.cs-state-col--after .cs-state-col-header,
.cs-compare-col--after .cs-compare-col-header {
  background: var(--terracotta-light);
  color: #9A5040;
}

.cs-state-col ul,
.cs-compare-col ul {
  list-style: none;
  padding: 0.75rem 0;
}

.cs-state-col li {
  display: flex;
  align-items: flex-start;
  gap: 0.625rem;
  padding: 0.5rem 1.25rem;
  font-size: var(--text-sm);
  font-weight: 300;
  color: var(--text-secondary);
  line-height: 1.55;
  border-bottom: 1px solid var(--border);
}
.cs-state-col li:last-child { border-bottom: none; }

.cs-compare-col li {
  padding: 0.5rem 1.25rem;
  font-size: var(--text-sm);
  font-weight: 300;
  color: var(--text-secondary);
  line-height: 1.55;
  border-bottom: 1px solid var(--border);
}
.cs-compare-col li:last-child { border-bottom: none; }

.cs-state-x     { color: #8B4444; font-weight: 600; flex-shrink: 0; }
.cs-state-check { color: #9A5040; font-weight: 600; flex-shrink: 0; }

/* =============================================
   CASE STUDY — Conditional Logic Diagram (CS3)
============================================= */
.cs-logic-diagram {
  margin: 1.75rem 0;
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  background: #fff;
}

.cs-logic-row {
  display: flex;
  align-items: stretch;
  border-bottom: 1px solid var(--border);
}
.cs-logic-row:last-child { border-bottom: none; }

.cs-logic-label {
  width: 200px;
  flex-shrink: 0;
  padding: 1rem 1.25rem;
  background: rgba(28,28,28,0.03);
  border-right: 1px solid var(--border);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  display: flex;
  align-items: center;
}

.cs-logic-content {
  padding: 1rem 1.25rem;
  font-size: var(--text-base);
  font-weight: 300;
  color: var(--text-secondary);
  line-height: 1.6;
  flex: 1;
}

.cs-logic-content strong {
  font-weight: 600;
  color: var(--text-primary);
}

.cs-logic-branches {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.cs-logic-branch {
  flex: 1 1 160px;
  padding: 0.625rem 1rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--terracotta-light);
}

.cs-logic-branch-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #9A5040;
  margin-bottom: 0.25rem;
}

.cs-logic-branch p {
  font-size: var(--text-sm);
  font-weight: 300;
  color: var(--text-secondary);
  line-height: 1.5;
  margin: 0;
}

.cs-logic-result {
  font-size: var(--text-sm);
  font-weight: 500;
  color: #9A5040;
}

/* =============================================
   CASE STUDY — UX Maturity Shift (CS3)
============================================= */
.cs-maturity-shift {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 1rem;
  align-items: center;
  margin: 1.75rem 0;
}

.cs-maturity-col {
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}

.cs-maturity-col-header {
  padding: 0.75rem 1.25rem;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.cs-maturity-col--before .cs-maturity-col-header {
  background: rgba(28,28,28,0.06);
  color: var(--text-muted);
}

.cs-maturity-col--after .cs-maturity-col-header {
  background: var(--terracotta-light);
  color: #9A5040;
}

.cs-maturity-col ul {
  list-style: none;
  padding: 0.75rem 0;
}

.cs-maturity-col li {
  padding: 0.5rem 1.25rem;
  font-size: var(--text-sm);
  font-weight: 300;
  color: var(--text-secondary);
  line-height: 1.55;
  border-bottom: 1px solid var(--border);
}
.cs-maturity-col li:last-child { border-bottom: none; }

.cs-maturity-arrow {
  font-size: var(--text-xl);
  color: var(--terracotta-mid);
  text-align: center;
  flex-shrink: 0;
}

/* =============================================
   CASE STUDY — Usability Findings (CS3)
============================================= */
.cs-findings-list {
  list-style: none;
  margin: 1.75rem 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.cs-finding {
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  background: #fff;
}

.cs-finding-header {
  padding: 0.875rem 1.25rem;
  border-bottom: 1px solid var(--border);
  background: rgba(28,28,28,0.02);
}

.cs-finding-title {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--text-primary);
}

.cs-finding-body {
  padding: 0.875rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.cs-finding-row {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 0.75rem;
  font-size: var(--text-sm);
  font-weight: 300;
  color: var(--text-secondary);
  line-height: 1.6;
}

.cs-finding-row-label {
  font-weight: 600;
  color: var(--text-primary);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding-top: 0.15rem;
}

/* =============================================
   CASE STUDY — Checklist
============================================= */
.cs-checklist {
  list-style: none;
  margin: 1.75rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.cs-checklist li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: var(--text-base);
  font-weight: 300;
  color: var(--text-secondary);
  line-height: 1.6;
}

.cs-checklist-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
}

.cs-checklist-icon i { font-size: 11px; }

.cs-checklist-item-title {
  font-weight: 600;
  color: var(--text-primary);
}

/* =============================================
   CASE STUDY — Loop (CS2 improvement / CS3 UX)
============================================= */
.cs-loop {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0;
  margin: 1.75rem 0;
}

.cs-loop-step {
  flex: 1 1 100px;
  text-align: center;
  padding: 1.25rem 0.75rem;
  border: 1px solid var(--border);
  border-right: none;
  background: #fff;
}
.cs-loop-step:first-child { border-radius: 6px 0 0 6px; }
.cs-loop-step:last-child  { border-right: 1px solid var(--border); border-radius: 0 6px 6px 0; }

.cs-loop-label {
  font-size: var(--text-sm);
  font-weight: 500;
  line-height: 1.4;
}

/* =============================================
   CASE STUDY — Blockquote
============================================= */
.cs-blockquote {
  margin: 2rem 0;
  padding: 2rem;
  background: var(--near-black);
  border-radius: 6px;
}

.cs-blockquote blockquote {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(1.125rem, 2.5vw, 1.375rem);
  color: rgba(255,255,255,0.88);
  line-height: 1.65;
  margin-bottom: 1rem;
}

.cs-blockquote cite {
  font-size: var(--text-sm);
  font-style: normal;
  font-weight: 400;
  color: rgba(255,255,255,0.5);
}

/* =============================================
   CASE STUDY — Key Learnings
============================================= */
.cs-learnings {
  list-style: none;
  margin: 1.75rem 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.cs-learnings li {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
}

.cs-learnings-arrow {
  flex-shrink: 0;
  font-size: var(--text-lg);
  font-weight: 300;
  line-height: 1.6;
}

.cs-learnings li p {
  font-size: var(--text-base);
  font-weight: 300;
  color: var(--text-secondary);
  line-height: 1.75;
  margin: 0;
}

.cs-learnings li p strong {
  font-weight: 600;
  color: var(--text-primary);
}

/* =============================================
   CASE STUDY — Closing Statement
============================================= */
.cs-closing {
  padding: 3.5rem 0;
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}

.cs-closing p {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(1.125rem, 2.5vw, 1.5rem);
  color: var(--text-muted);
  line-height: 1.65;
}

/* =============================================
   CASE STUDY — Sequential Nav CTA
============================================= */
.cs-nav-cta {
  background: var(--near-black);
  padding: 4rem 0 3rem;
  position: relative;
  overflow: hidden;
}

.cs-nav-cta-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--content-pad);
}

/* Back to top */
.cs-nav-top {
  display: flex;
  justify-content: center;
  margin-bottom: 2.5rem;
}

.cs-nav-top-link {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: var(--text-sm);
  font-weight: 500;
  color: rgba(255,255,255,0.45);
  letter-spacing: 0.04em;
  transition: color 0.2s;
}
.cs-nav-top-link:hover { color: rgba(255,255,255,0.78); }

/* Card row */
.cs-nav-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.cs-nav-card {
  display: block;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.08);
  text-decoration: none;
  transition: border-color 0.2s, transform 0.2s;
}
.cs-nav-card:hover {
  border-color: rgba(255,255,255,0.22);
  transform: translateY(-2px);
}

/* Color block at top of card */
.cs-nav-card-visual {
  height: 80px;
  position: relative;
  display: flex;
  align-items: flex-end;
  padding: 0.75rem 1rem;
}

.cs-nav-card-visual--sage   { background: var(--sage); }
.cs-nav-card-visual--indigo { background: var(--indigo); }
.cs-nav-card-visual--terra  { background: var(--terracotta); }
.cs-nav-card-visual--neutral {
  background: rgba(255,255,255,0.06);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.cs-nav-card-num {
  font-family: var(--font-display);
  font-size: 3.5rem;
  line-height: 1;
  color: #fff;
  opacity: 0.18;
  position: absolute;
  bottom: -0.25rem;
  right: 0.75rem;
  user-select: none;
  pointer-events: none;
}

/* Card body */
.cs-nav-card-body {
  padding: 1rem 1.25rem 1.25rem;
  background: rgba(255,255,255,0.04);
}

.cs-nav-card-eyebrow {
  font-size: 0.75rem;        /* 12px minimum */
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.45);
  margin-bottom: 0.375rem;
}

.cs-nav-card-title {
  font-family: var(--font-display);
  font-size: clamp(0.9375rem, 2vw, 1.125rem);
  font-weight: 400;
  color: rgba(255,255,255,0.88);
  line-height: 1.3;
  margin-bottom: 0.75rem;
}

.cs-nav-card-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: var(--text-sm);
  font-weight: 500;
  color: rgba(255,255,255,0.55);
}

@media (prefers-reduced-motion: no-preference) {
  .cs-nav-card-arrow { transition: gap 0.2s; }
  .cs-nav-card:hover .cs-nav-card-arrow { gap: 0.625rem; }
}

/* Responsive */
@media (max-width: 600px) {
  .cs-nav-cards { grid-template-columns: 1fr; }
}

/* =============================================
   CASE STUDY — Responsive
============================================= */
@media (max-width: 900px) {
  .cs-atomic-flow     { grid-template-columns: repeat(2, 1fr); }
  .cs-atomic-examples { grid-template-columns: 1fr; }
  .cs-card-grid--3    { grid-template-columns: repeat(2, 1fr); }
  .cs-timeline        { grid-template-columns: 1fr; }
  .cs-timeline-phase  { border-right: none; border-bottom: 1px solid var(--border); }
  .cs-timeline-phase:last-child { border-bottom: none; }
  .cs-persona-body    { grid-template-columns: 1fr; }
  .cs-persona-col     { border-right: none; border-bottom: 1px solid var(--border); }
  .cs-persona-col:last-child { border-bottom: none; }
  .cs-maturity-shift  { grid-template-columns: 1fr; }
  .cs-maturity-arrow  { display: none; }
}

@media (max-width: 768px) {
  .cs-hero        { padding: calc(72px + 2rem) 0 2.5rem; }
  .cs-hero-meta   { gap: 1rem; }
  .cs-meta-item   { border-right: none; padding-right: 0; }
  .cs-metrics-inner { gap: 1.5rem; }
  .cs-metric      { border-right: none; margin-right: 0; padding-right: 0; flex: 1 1 40%; }
  .cs-two-col     { grid-template-columns: 1fr; }
  .cs-atomic-flow { grid-template-columns: 1fr; }
  .cs-atomic-step { border-right: none; border-bottom: 1px solid var(--border); }
  .cs-atomic-step:last-child { border-bottom: none; }
  .cs-cascade     { flex-direction: column; }
  .cs-cascade-step { width: 100%; border-right: 1px solid var(--border); border-bottom: none; border-radius: 0; }
  .cs-cascade-step:first-child { border-radius: 6px 6px 0 0; }
  .cs-cascade-step:last-child  { border-radius: 0 0 6px 6px; border-bottom: 1px solid var(--border); }
  .cs-adoption-flow { flex-direction: column; }
  .cs-adoption-step { width: 100%; border-right: 1px solid var(--border); border-bottom: none; border-radius: 0; }
  .cs-adoption-step:first-child { border-radius: 6px 6px 0 0; }
  .cs-adoption-step:last-child  { border-radius: 0 0 6px 6px; border-bottom: 1px solid var(--border); }
  .cs-language-change-grid { grid-template-columns: 1fr; }
  .cs-state-grid   { grid-template-columns: 1fr; }
  .cs-compare-grid { grid-template-columns: 1fr; }
  .cs-logic-label  { width: 120px; }
  .cs-loop { flex-direction: column; }
  .cs-loop-step { width: 100%; border-right: 1px solid var(--border); border-bottom: none; border-radius: 0; }
  .cs-loop-step:first-child { border-radius: 6px 6px 0 0; }
  .cs-loop-step:last-child  { border-radius: 0 0 6px 6px; border-bottom: 1px solid var(--border); }
  .cs-audit-item  { grid-template-columns: 1fr; }
  .cs-finding-row { grid-template-columns: 1fr; gap: 0.25rem; }
  .cs-section     { padding: 3rem 0; }
}

@media (max-width: 480px) {
  .cs-card-grid--3 { grid-template-columns: 1fr; }
  .cs-logic-row    { flex-direction: column; }
  .cs-logic-label  { width: 100%; border-right: none; border-bottom: 1px solid var(--border); }
}

@media (max-width: 360px) {
  .cs-hero   { padding: calc(72px + 1.5rem) 0 2rem; }
  .cs-metric { flex: 1 1 100%; }
}

/* =============================================
   CASE STUDY — Screenshot / Artifact Figure
============================================= */

.cs-figure {
  margin: 2rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* Default: image drives its own height naturally */
.cs-figure-frame {
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
  line-height: 0;
}

.cs-figure-frame img {
  width: 100%;
  height: auto;
  display: block;
}

/* --tall: portrait images capped at 560px, showing from top */
.cs-figure-frame--tall {
  max-height: 560px;
  overflow-y: hidden;
}

/* --portrait: constrain portrait images to feel document-like, not full-bleed */
.cs-figure-frame--portrait {
  max-width: 640px;
}

.cs-figure-caption {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  font-size: var(--text-sm);
  font-weight: 300;
  color: var(--text-muted);
  line-height: 1.55;
}

.cs-figure-caption-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  flex-shrink: 0;
}

.cs-body--sage   .cs-figure-caption-label { color: var(--sage-dark); }
.cs-body--indigo .cs-figure-caption-label { color: var(--indigo); }
.cs-body--terra  .cs-figure-caption-label { color: #9A5040; }

@media (max-width: 640px) {
  .cs-figure-frame--tall    { max-height: 380px; }
  .cs-figure-frame--portrait { max-width: 100%; }
}

/* =============================================
   FIX — Cascade step equal height (CS2 Framework Architecture)
   Prevents "Product Experiences" wrapping wider than siblings
============================================= */
.cs-cascade {
  align-items: stretch;
}

.cs-cascade-step {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}