/* ─── CASE STUDY PAGES — extends style.css tokens ───────────── */

.cs-hero {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 150px 24px 40px;
}
.cs-kicker {
  font-family: 'Fira Code', monospace;
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .14em;
  color: var(--accent);
  margin-bottom: 14px;
}
.cs-title {
  font-size: clamp(1.8rem, 4vw, 2.7rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
  max-width: 820px;
  margin-bottom: 18px;
}
.cs-summary {
  color: var(--text2);
  font-size: 1.05rem;
  max-width: 720px;
  margin-bottom: 24px;
}
.cs-meta {
  display: flex; flex-wrap: wrap; gap: 10px 24px;
  color: var(--text2);
  font-size: .84rem;
  font-family: 'Fira Code', monospace;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border);
}
.cs-meta strong { color: var(--text3); font-weight: 500; }

.cs-article {
  max-width: 760px;
  margin: 0 auto;
  padding: 40px 24px 90px;
}
.cs-article h2 {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 44px 0 14px;
  padding-top: 8px;
}
.cs-article h2::before {
  content: '§';
  color: var(--accent);
  margin-right: 10px;
  opacity: .7;
}
.cs-article h3 {
  font-size: 1.02rem;
  font-weight: 600;
  margin: 26px 0 10px;
  color: var(--text);
}
.cs-article p {
  color: var(--text3);
  margin-bottom: 16px;
  font-size: .97rem;
  line-height: 1.75;
}
.cs-article ul, .cs-article ol {
  margin: 0 0 16px 22px;
  color: var(--text3);
  font-size: .95rem;
  line-height: 1.7;
  display: flex; flex-direction: column; gap: 6px;
}
.cs-article strong { color: var(--text); }
.cs-article code {
  font-family: 'Fira Code', monospace;
  font-size: .85em;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 1px 6px;
}

.cs-callout {
  background: var(--bg2);
  border: 1px solid var(--border2);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  margin: 20px 0;
  color: var(--text3);
  font-size: .93rem;
}

/* option-considered blocks */
.cs-option {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  margin-bottom: 12px;
  background: var(--bg2);
}
.cs-option .cs-option-name {
  font-weight: 600;
  color: var(--text);
  font-size: .95rem;
  margin-bottom: 4px;
}
.cs-option .cs-option-verdict {
  font-family: 'Fira Code', monospace;
  font-size: .74rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  margin-bottom: 6px;
}
.cs-option.rejected .cs-option-verdict { color: var(--warn); }
.cs-option.chosen   .cs-option-verdict { color: var(--good); }
.cs-option.chosen   { border-color: rgba(63,185,80,.35); }
.cs-option p { margin: 0; font-size: .9rem; }

/* diagram */
.cs-diagram {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin: 24px 0;
  overflow-x: auto;
}
.cs-diagram svg { width: 100%; height: auto; min-width: 560px; }
.cs-diagram figcaption {
  color: var(--text2);
  font-size: .8rem;
  margin-top: 12px;
  text-align: center;
  font-family: 'Fira Code', monospace;
}
.diagram-box  { fill: var(--bg4); stroke: var(--border2); rx: 8; }
.diagram-box-accent { fill: var(--accent-soft); stroke: var(--accent); rx: 8; }
.diagram-label { fill: var(--text); font: 500 13px 'Inter', sans-serif; }
.diagram-sub   { fill: var(--text2); font: 400 11px 'Fira Code', monospace; }
.diagram-arrow { stroke: var(--text2); stroke-width: 1.5; fill: none; marker-end: url(#arrowhead); }

/* outcome stats row */
.cs-outcome-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 20px 0 8px;
}
.cs-outcome-stats .stat { padding: 18px 18px; }

/* footer nav between studies */
.cs-next {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 24px 90px;
  display: flex;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
}

@media (max-width: 768px) {
  .cs-hero { padding: 120px 24px 28px; }
  .cs-outcome-stats { grid-template-columns: 1fr; }
}