/* ============================================================
   Case Study — Editorial Two-Column Layout
   ============================================================ */

/* Back Navigation */
.cs-back {
  padding-top: var(--space-4);
}

.cs-back-link {
  font-size: var(--text-sm);
  color: var(--color-label-tertiary);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding-block: var(--space-4);
  transition: color var(--duration-fast) var(--ease-standard);
  text-decoration: none;
}

.cs-back-link:hover {
  color: var(--color-label-primary);
}

/* ── Header ──────────────────────────────────────────────── */
.cs-header {
  padding-block: var(--space-16) var(--space-12);
  border-bottom: 1px solid var(--color-separator);
}

/* Two-column header grid */
.cs-header-grid {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: var(--space-16);
  align-items: start;
}

/* Left: stacked meta items */
.cs-meta {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
  padding-top: var(--space-2);
}

.cs-meta-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.cs-meta-item .text-label {
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-label-quaternary);
  font-weight: var(--weight-medium);
}

.cs-meta-value {
  font-size: var(--text-sm);
  color: var(--color-label-primary);
  font-weight: var(--weight-medium);
}

/* Right: title block */
.cs-header-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.cs-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.cs-title {
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 700;
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-tight);
  margin: 0;
}

.cs-subtitle {
  font-size: var(--text-md);
  color: var(--color-label-secondary);
  line-height: var(--leading-normal);
  max-width: 600px;
  margin: 0;
}

/* ── Cover Image ─────────────────────────────────────────── */
.cs-cover {
  margin-block: var(--space-12);
}

.cs-cover-image {
  width: 100%;
  background: var(--color-fill-secondary);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.cs-cover-image img {
  width: 100%;
  height: auto;
  display: block;
}

/* ── Body: two-column editorial rows ────────────────────── */
.cs-body {
  padding-block: var(--space-16);
}

/* Each editorial row: label left + content right */
.cs-row {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: var(--space-16);
  padding-block: var(--space-12);
  border-top: 1px solid var(--color-separator);
  align-items: start;
}

.cs-row-label {
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-label-quaternary);
  font-weight: var(--weight-medium);
  padding-top: var(--space-1);
  position: sticky;
  top: 100px;
}

.cs-row-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.cs-row-content p {
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-label-secondary);
  margin: 0;
}

.cs-row-content h2 {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-label-primary);
  margin: 0;
  letter-spacing: var(--tracking-tight);
}

.cs-row-content ul,
.cs-row-content ol {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding-left: var(--space-5);
}

.cs-row-content li {
  font-size: var(--text-base);
  color: var(--color-label-secondary);
  line-height: var(--leading-normal);
}

/* ── Full-bleed image block ──────────────────────────────── */
.cs-full-image {
  width: 100%;
  margin-block: var(--space-4);
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--color-fill-secondary);
  box-shadow: var(--shadow-md);
}

.cs-full-image img {
  width: 100%;
  height: auto;
  display: block;
}

.cs-full-image.cs-full-image--dark {
  background: #111;
  border-radius: var(--radius-xl);
}

/* Caption below a full image */
.cs-image-caption {
  font-size: var(--text-sm);
  color: var(--color-label-tertiary);
  margin-top: var(--space-3);
  text-align: left;
  line-height: var(--leading-snug);
  margin-bottom: var(--space-12);
}

/* Full-width caption variant — sits outside carousel, spans container */
.cs-image-caption--full {
  width: 100%;
  display: block;
  margin-top: var(--space-4);
}

/* ── Carousel ────────────────────────────────────────────── */
.cs-carousel {
  margin-block: var(--space-4);
}

.cs-carousel-viewport {
  width: 100%;
  overflow: hidden;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  background: var(--color-fill-secondary);
}

.cs-carousel-track {
  display: flex;
  transition: transform 1s cubic-bezier(0.45, 0, 0.2, 1);
  will-change: transform;
}

.cs-carousel-slide {
  flex: 0 0 100%;
  width: 100%;
}

.cs-carousel-slide img {
  width: 100%;
  height: auto;
  display: block;
}

/* Dot indicators */
.cs-carousel-dots {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.cs-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  border: none;
  background: var(--color-separator);
  cursor: pointer;
  padding: 0;
  transition: background var(--duration-base) var(--ease-standard),
              width var(--duration-base) var(--ease-standard);
}

.cs-dot--active {
  background: var(--color-label-primary);
  width: 24px;
}

/* ── Placeholder for images not yet provided ─────────────── */
.cs-img-placeholder {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--color-fill-secondary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-label-quaternary);
  font-size: var(--text-sm);
}

/* ── Callout / Key Insight ───────────────────────────────── */
.cs-callout {
  background: var(--color-fill-secondary);
  border-radius: var(--radius-xl);
  padding: var(--space-8) var(--space-10);
  border-left: 3px solid var(--color-accent);
}

.cs-callout-label {
  display: block;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  font-weight: var(--weight-medium);
  margin-bottom: var(--space-3);
}

.cs-callout-text {
  font-size: var(--text-base);
  color: var(--color-label-primary);
  line-height: var(--leading-normal);
  font-weight: var(--weight-medium);
  margin: 0;
}

/* ── Stats Row ───────────────────────────────────────────── */
.cs-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
  padding: var(--space-10);
  background: var(--color-fill-secondary);
  border-radius: var(--radius-xl);
}

.cs-stat {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.cs-stat-number {
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 700;
  letter-spacing: var(--tracking-tight);
  color: var(--color-label-primary);
  line-height: 1;
}

.cs-stat-label {
  font-size: var(--text-sm);
  color: var(--color-label-tertiary);
  margin-top: var(--space-2);
}

/* ── Blockquote ──────────────────────────────────────────── */
.cs-blockquote {
  border-left: 2px solid var(--color-separator);
  padding-left: var(--space-6);
  margin: 0;
  font-style: italic;
  color: var(--color-label-secondary);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
}

.cs-blockquote cite {
  display: block;
  margin-top: var(--space-3);
  font-style: normal;
  font-size: var(--text-sm);
  color: var(--color-label-tertiary);
}

/* ── Up Next ────────────────────────────────────────── */
.cs-next {
  border-top: 1px solid var(--color-separator);
  padding-block: var(--space-12) var(--space-24);
}

.cs-next-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-8);
}

.cs-next-title {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-label-primary);
  margin: 0;
  letter-spacing: var(--tracking-tight);
}

.cs-next-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-fill-secondary);
  color: var(--color-label-primary);
  border-radius: var(--radius-full);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  transition: background var(--duration-fast) var(--ease-standard);
}

.cs-next-btn:hover {
  background: var(--color-fill-tertiary);
}

/* Legacy single-link style for other pages */
.cs-next-link {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  text-decoration: none;
}

.cs-next-link:hover .cs-next-title {
  color: var(--color-accent);
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 768px) {
  .cs-header-grid,
  .cs-row {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .cs-row-label {
    position: static;
    padding-bottom: var(--space-2);
    border-bottom: 1px solid var(--color-separator);
  }

  .cs-meta {
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--space-6);
  }

  .cs-stats {
    grid-template-columns: 1fr;
    gap: var(--space-6);
    padding: var(--space-6);
  }
}

/* ── Table Styles ────────────────────────────────────────── */
.cs-table-wrapper {
  width: 100%;
  overflow-x: auto;
  margin-block: var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-separator);
}

.cs-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: var(--text-sm);
  color: var(--color-label-secondary);
}

.cs-table th,
.cs-table td {
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-separator);
  line-height: var(--leading-normal);
}

.cs-table th {
  background: var(--color-fill-secondary);
  color: var(--color-label-primary);
  font-weight: var(--weight-semibold);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.cs-table tr:last-child td {
  border-bottom: none;
}