/* ============================================================
   CASE STUDY — deck before/after walkthrough
   Used by case-study-deck.html
   ============================================================ */

/* ── HERO ─────────────────────────────────────────────────── */

.cs-hero {
  padding: 10rem 4rem 4rem;
  background: var(--warm-wash);
  border-bottom: 1px solid var(--border);
}

.cs-hero-inner {
  max-width: 760px;
}

.cs-hero-title {
  font-family: 'Playfair Display', serif;
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 0 0 1.75rem;
}

.cs-hero-lede {
  font-size: 1.05rem;
  font-weight: 300;
  line-height: 1.85;
  color: var(--ink);
  margin: 0 0 1.25rem;
  max-width: 640px;
}

.cs-hero-lede--muted {
  color: var(--muted);
  font-size: 0.95rem;
}

.cs-back {
  display: inline-block;
  margin-top: 1.25rem;
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s;
}

.cs-back:hover { color: var(--ink); }

/* ── ROWS ─────────────────────────────────────────────────── */

.cs-rows {
  padding: 4rem 4rem 5rem;
  display: flex;
  flex-direction: column;
  gap: 5rem;
  max-width: 1400px;
  margin: 0 auto;
}

.cs-row {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

.cs-row-header {
  display: flex;
  align-items: baseline;
  gap: 1.25rem;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.75rem;
}

.cs-row-num {
  font-family: 'Playfair Display', serif;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--ochre);
  letter-spacing: 0.02em;
}

.cs-row-title {
  font-family: 'Playfair Display', serif;
  font-size: clamp(1.4rem, 2.2vw, 1.75rem);
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--ink);
  line-height: 1.2;
  margin: 0;
}

.cs-row-tag {
  margin-left: auto;
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ── COMPARE GRID ─────────────────────────────────────────── */

.cs-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  align-items: start;
}

.cs-compare--single {
  grid-template-columns: minmax(0, 720px);
  justify-content: center;
}

.cs-panel {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin: 0;
}

.cs-side-label {
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0;
}

.cs-panel--after .cs-side-label {
  color: var(--ochre);
}

.cs-panel img,
.cs-panel .cs-video {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: 3px;
  background: var(--ink);
}

.cs-video img {
  /* fallback image inside <video> inherits video sizing */
  border: 0;
  border-radius: 0;
}

.cs-panel-stack {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* ── CAPTION ──────────────────────────────────────────────── */

.cs-caption {
  font-size: 0.98rem;
  font-weight: 300;
  line-height: 1.8;
  color: var(--ink);
  max-width: 680px;
  margin: 0;
}

.cs-row--unchanged .cs-caption {
  color: var(--muted);
  font-style: italic;
  text-align: center;
  max-width: 540px;
  margin: 0 auto;
}

/* ── CLOSING ──────────────────────────────────────────────── */

.cs-closing {
  padding: 5rem 4rem 6rem;
  background: var(--warm-wash);
  border-top: 1px solid var(--border);
}

.cs-closing-inner {
  max-width: 760px;
}

.cs-closing-body {
  font-size: 1.05rem;
  font-weight: 300;
  line-height: 1.85;
  color: var(--ink);
  margin: 1rem 0 2rem;
}

.cs-closing-actions {
  display: flex;
  gap: 1.5rem;
  align-items: center;
  flex-wrap: wrap;
}

.cs-closing-link {
  font-family: 'Jost', sans-serif;
  font-size: 0.82rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--ink);
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
  text-decoration: none;
  transition: color 0.2s;
}

.cs-closing-link:hover { color: var(--ochre); }

/* ── RESPONSIVE ───────────────────────────────────────────── */

@media (max-width: 900px) {
  .cs-hero { padding: 7rem 1.5rem 3rem; }
  .cs-rows { padding: 3rem 1.5rem 4rem; gap: 3.5rem; }
  .cs-closing { padding: 3rem 1.5rem 4rem; }

  .cs-compare {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .cs-row-tag {
    margin-left: 0;
    width: 100%;
  }
}