/* Case Study Pages — extends site design system */

/* Hero banner */
.cs-hero {
  position: relative;
  overflow: hidden;
  min-height: 420px;
  display: flex;
  align-items: flex-end;
  background: var(--color-charcoal);
}
.cs-hero__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 40%;
  opacity: 0.55;
}
.cs-hero__overlay {
  position: relative;
  z-index: 1;
  width: 100%;
  padding: var(--space-2xl) 0 var(--space-xl);
  background: linear-gradient(to top, rgba(43,45,47,0.92) 0%, rgba(43,45,47,0.4) 60%, transparent 100%);
}
.cs-hero__eyebrow {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-sage);
  margin: 0 0 var(--space-sm);
}
.cs-hero h1 {
  color: var(--color-alabaster);
  margin: 0;
  max-width: 38ch;
}

/* Stats ribbon */
.cs-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--space-md);
  padding: var(--space-lg) 0;
}
.cs-stat {
  text-align: center;
  padding: var(--space-md) var(--space-sm);
  border-radius: var(--radius);
  background: var(--color-surface-elevated);
  border: 1px solid var(--line-silt-soft);
  box-shadow: 0 0 0 1px var(--line-bronze-soft);
}
.cs-stat__value {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  line-height: 1.1;
  color: var(--color-silt);
  margin-bottom: 0.25rem;
}
.cs-stat__label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  line-height: 1.3;
}

/* Info sidebar / meta box */
.cs-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-sm) var(--space-lg);
  padding: var(--space-lg);
  border-radius: var(--radius);
  background: var(--color-surface);
  border: 1px solid var(--line-silt-soft);
  box-shadow: 0 0 0 1px var(--line-bronze-soft);
  margin-bottom: var(--space-xl);
}
.cs-meta dt {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-sage);
  margin-bottom: 0.25rem;
}
.cs-meta dd {
  margin: 0 0 var(--space-sm);
  color: var(--color-text-on-dark);
  line-height: 1.5;
}
.cs-meta dd:last-of-type {
  margin-bottom: 0;
}

/* Narrative prose */
.cs-prose {
  max-width: 68ch;
  margin: 0 auto;
}
.cs-prose h2 {
  margin-top: var(--space-xl);
}
.cs-prose h3 {
  margin-top: var(--space-lg);
  color: var(--color-silt);
}
.cs-prose p {
  line-height: 1.7;
}
.cs-prose ul {
  padding-left: 1.25em;
  margin: 0 0 1em;
}
.cs-prose li {
  margin-bottom: 0.5em;
  line-height: 1.6;
  color: var(--color-text-on-dark);
}
.section--light .cs-prose li {
  color: var(--color-text-on-light);
}

/* Blockquote */
.cs-quote {
  border-left: 4px solid var(--color-bronze);
  margin: var(--space-lg) 0;
  padding: var(--space-md) var(--space-lg);
  font-size: 1.15rem;
  font-style: italic;
  line-height: 1.6;
  color: var(--color-alabaster);
  background: var(--mist-alabaster);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.section--light .cs-quote {
  color: var(--color-text-on-light);
  background: rgba(43, 45, 47, 0.04);
  border-left-color: var(--color-bronze);
}

/* Image layouts */
.cs-image {
  margin: var(--space-lg) 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line-silt-soft);
  box-shadow:
    0 0 0 1px var(--line-bronze-soft),
    0 8px 24px rgba(0,0,0,0.15);
}
.cs-image img {
  width: 100%;
  height: auto;
  display: block;
}
.cs-image figcaption {
  padding: var(--space-sm) var(--space-md);
  font-size: 0.85rem;
  color: var(--color-text-muted);
  background: var(--color-surface-elevated);
  text-align: center;
  border-top: 1px solid var(--line-silt-soft);
}

.cs-image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-md);
  margin: var(--space-lg) 0;
}
.cs-image-grid .cs-image {
  margin: 0;
}

/* Two-column comparison */
.cs-comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  margin: var(--space-lg) 0;
}
@media (max-width: 600px) {
  .cs-comparison {
    grid-template-columns: 1fr;
  }
}

/* Logos row */
.cs-logos {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xl);
  padding: var(--space-lg) 0;
  flex-wrap: wrap;
}
.cs-logos img {
  height: 60px;
  width: auto;
  object-fit: contain;
  opacity: 0.9;
}

/* Products used pills */
.cs-products {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin: var(--space-md) 0;
}
.cs-product-tag {
  display: inline-block;
  padding: 0.4rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--color-alabaster);
  background: var(--color-surface-elevated);
  border: 1px solid var(--line-silt-soft);
  border-radius: 999px;
}

/* Process table */
.cs-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: var(--space-lg) 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line-silt-soft);
}
.cs-table th,
.cs-table td {
  padding: var(--space-sm) var(--space-md);
  text-align: left;
  border-bottom: 1px solid var(--line-silt-soft);
  vertical-align: top;
}
.cs-table th {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-sage);
  background: var(--color-surface);
}
.cs-table td {
  color: var(--color-text-on-dark);
  background: var(--color-surface-elevated);
  line-height: 1.6;
}
.cs-table tr:last-child td {
  border-bottom: none;
}
.section--light .cs-table th {
  color: var(--color-bronze);
  background: rgba(43,45,47,0.06);
}
.section--light .cs-table td {
  color: var(--color-text-on-light);
  background: #fff;
}

/* Related case studies */
.cs-related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
}
.cs-related-card {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line-silt-soft);
  box-shadow:
    0 0 0 1px var(--line-bronze-soft),
    0 8px 24px rgba(0,0,0,0.12);
  background: var(--color-surface-elevated);
  text-decoration: none;
  display: block;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.cs-related-card:hover {
  transform: translateY(-3px);
  box-shadow:
    0 0 0 1px var(--line-bronze-soft),
    0 16px 40px rgba(0,0,0,0.2);
  text-decoration: none;
}
.cs-related-card img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
}
.cs-related-card__body {
  padding: var(--space-md);
}
.cs-related-card__eyebrow {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-sage);
  margin-bottom: 0.5rem;
}
.cs-related-card__title {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--color-alabaster);
  line-height: 1.35;
  margin: 0;
}
.cs-related-card:hover .cs-related-card__title {
  color: var(--color-accent);
}

/* CTA banner */
.cs-cta {
  text-align: center;
  padding: var(--space-2xl) 0;
}
.cs-cta h2 {
  margin-bottom: var(--space-md);
}
.cs-cta p {
  max-width: 48ch;
  margin: 0 auto var(--space-lg);
  font-size: 1.05rem;
}

/* Back link */
.cs-back {
  display: inline-block;
  margin-bottom: var(--space-md);
  font-size: 0.9rem;
  font-weight: 500;
}

/* Highlight box for key results */
.cs-highlight {
  padding: var(--space-lg);
  border-radius: var(--radius);
  background: var(--color-surface-elevated);
  border: 1px solid var(--line-silt-soft);
  box-shadow: 0 0 0 1px var(--line-bronze-soft);
  margin: var(--space-lg) 0;
}
.cs-highlight h3 {
  color: var(--color-silt);
  margin-top: 0;
}
.cs-highlight p:last-child {
  margin-bottom: 0;
}

/* Problem/solution pattern */
.cs-problem {
  margin: var(--space-lg) 0;
  padding: var(--space-lg);
  border-radius: var(--radius);
  background: var(--color-surface);
  border-left: 4px solid var(--color-bronze);
}
.cs-problem h3 {
  color: var(--color-alabaster);
  margin-top: 0;
}
.cs-problem strong {
  color: var(--color-silt);
}

@media (max-width: 768px) {
  .cs-hero {
    min-height: 300px;
  }
  .cs-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  .cs-meta {
    grid-template-columns: 1fr;
  }
  .cs-image-grid {
    grid-template-columns: 1fr;
  }
}