/* ── NAV ── */
.cs-nav {
  max-width: 760px;
  margin: 0 auto;
  padding: 2rem 2rem 0;
}
.back-link {
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--mid);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: color 0.2s;
}
.back-link:hover { color: var(--ink); }

/* ── MAIN COLUMN ── */
.case {
  max-width: 760px;
  margin: 0 auto;
  padding: 3rem 2rem 6rem;
}

/* ── HEADER ── */
.case-header {
  margin-bottom: 3rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--rule);
}
.case-eyebrow {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.case-eyebrow::before {
  content: '';
  display: inline-block;
  width: 1.5rem;
  height: 1px;
  background: var(--accent);
}
.case-page-title {
  font-family: var(--serif);
  font-size: clamp(2rem, 4vw, 2.8rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin-bottom: 1.25rem;
}
.case-summary {
  font-size: 1.05rem;
  color: var(--mid);
  line-height: 1.75;
  max-width: 58ch;
  margin-bottom: 2rem;
}

/* Meta row */
.case-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
}
.meta-label {
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mid);
  margin-bottom: 0.25rem;
}
.meta-value {
  font-size: 0.875rem;
  color: var(--ink);
  font-weight: 400;
}

/* ── IMPACT BAR ── */
.impact-bar {
  background: var(--ink);
  color: var(--warm-bg);
  padding: 2rem 2.25rem;
  margin-bottom: 3.5rem;
}
.impact-bar-label {
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 1rem;
}
.impact-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.impact-list li {
  font-size: 0.9rem;
  line-height: 1.55;
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  color: #e8e4de;
}
.impact-list li::before {
  content: '↳';
  color: var(--accent);
  flex-shrink: 0;
  margin-top: 0.05em;
}

/* ── SECTIONS ── */
.case-section { margin-bottom: 3.5rem; }

.case h2 {
  font-family: var(--serif);
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--ink);
  margin-bottom: 1rem;
  line-height: 1.25;
}

.case p {
  font-size: 0.975rem;
  color: var(--mid);
  line-height: 1.75;
  margin-bottom: 1rem;
  max-width: 62ch;
}
.case p:last-child { margin-bottom: 0; }

.case strong { color: var(--ink); font-weight: 500; }

.highlight { color: var(--ink); font-weight: 500; }

/* ── METHOD BLOCK ── */
.method-block {
  border: 1px solid var(--rule);
  background: var(--card-bg);
  padding: 1.25rem 1.5rem;
  margin: 1.25rem 0;
}
.method-block-label {
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mid);
  opacity: 0.7;
  margin-bottom: 0.75rem;
  font-weight: 400;
}
.method-block p {
  font-size: 0.82rem;
  color: var(--mid);
  opacity: 0.85;
  margin: 0;
  max-width: none;
}

/* ── INSIGHT CARDS ── */
.insight-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  margin: 1.5rem 0;
}
.insight-card {
  background: var(--card-bg);
  padding: 1.5rem 1.75rem;
}
.insight-card.full {
  grid-column: 1 / -1;
}
.insight-num {
  font-family: var(--serif);
  font-size: 1.75rem;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 0.5rem;
  opacity: 0.6;
}
.insight-title {
  font-size: 0.875rem;
  color: var(--ink);
  font-weight: 500;
  line-height: 1.4;
  margin-bottom: 0.5rem;
}
.insight-body {
  font-size: 0.78rem;
  color: var(--mid);
  line-height: 1.6;
  max-width: none;
  margin: 0;
}

/* ── RESULT STAT ROW ── */
.stat-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  margin: 1.5rem 0;
}
.stat-cell {
  background: var(--card-bg);
  padding: 1.5rem 1.75rem;
  text-align: center;
}
.stat-big {
  font-family: var(--serif);
  font-size: 2.25rem;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 0.4rem;
}
.stat-desc {
  font-size: 0.78rem;
  color: var(--mid);
  line-height: 1.5;
}

/* ── NEXT STEPS ── */
.next-row {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin: 1.25rem 0;
}
.next-item {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
}
.next-arrow {
  color: var(--accent);
  font-size: 0.875rem;
  flex-shrink: 0;
  margin-top: 0.15em;
}
.next-text {
  font-size: 0.9rem;
  color: var(--ink);
  line-height: 1.55;
  margin: 0;
  max-width: none;
}
.next-sub {
  font-size: 0.78rem;
  color: var(--mid);
  margin: 0.2rem 0 0;
  max-width: none;
}

/* ── PHASE LABEL ── */
.phase-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mid);
  margin-bottom: 1.25rem;
  padding: 0.3rem 0.75rem;
  border: 1px solid var(--rule);
  background: var(--card-bg);
}

/* ── IMAGES ── */
.case-img {
  width: 100%;
  height: auto;
  display: block;
  margin: 2rem 0;
  border: 1px solid var(--rule);
}
.case-img-caption {
  font-size: 0.75rem;
  color: var(--mid);
  letter-spacing: 0.03em;
  margin-top: -1.5rem;
  margin-bottom: 2rem;
  font-style: italic;
}

/* ── DIVIDER ── */
.rule {
  border: none;
  border-top: 1px solid var(--rule);
  margin: 3rem 0;
}

@media (max-width: 600px) {
  .insight-grid,
  .stat-row { grid-template-columns: 1fr; }
  .insight-card.full { grid-column: 1; }
  .case-meta { gap: 1.25rem; }
}