/* ============================================================
   THINK LAYER — Case Study Detail Page Styles (Warm Editorial Layout)
   ============================================================ */

/* ----------------------------------------------------------
   1. Case Hero (Premium Warm Editorial Header)
   ---------------------------------------------------------- */
.case-hero {
  padding: 160px 0 72px;
  border-bottom: 1px solid var(--border-light);
  background: var(--color-light);
  color: var(--text-primary);
  position: relative;
  overflow: hidden;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.9rem;
  margin-bottom: 40px;
  transition: all 0.3s var(--ease-out-expo);
  border-bottom: 1px solid transparent;
}

.back-link svg {
  transition: transform 0.2s ease;
}

.back-link:hover {
  color: var(--text-primary);
  border-bottom-color: var(--text-primary);
}

.back-link:hover svg {
  transform: translateX(-4px);
}

.case-title-row {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  margin-bottom: 36px;
}

.case-logo-lg {
  width: 56px;
  height: 56px;
  min-width: 56px;
  background-color: var(--color-cream);
  border: 1px solid var(--border-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--text-primary);
}

.case-title {
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  font-weight: 400; /* Regular serif weight Lora */
  font-family: var(--font-heading);
  letter-spacing: -0.02em;
  line-height: 1.12;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.case-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 680px;
}

/* ----------------------------------------------------------
   2. Case Meta Strip (Warm paper card)
   ---------------------------------------------------------- */
.case-meta {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding: 28px 32px;
  background-color: var(--color-card);
  border-radius: 12px;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-card);
  margin-top: 48px;
}

.meta-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.meta-label {
  font-size: 11px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}

.meta-value {
  font-size: 14px;
  color: var(--text-primary);
  font-weight: 500;
}

.meta-value a {
  color: var(--color-accent);
  border-bottom: 1.5px solid transparent;
}

.meta-value a:hover {
  border-bottom-color: var(--color-accent);
}

/* ----------------------------------------------------------
   3. Case Content
   ---------------------------------------------------------- */
.case-content {
  max-width: 720px;
  margin: 0 auto;
  padding: 80px 24px;
}

.case-section {
  margin-bottom: 48px;
}

.case-section h3 {
  font-family: var(--font-body);
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.case-section p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 18px;
}

.case-section ul {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 18px;
}

.case-section ul li {
  display: flex;
  gap: 12px;
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.case-section ul li::before {
  content: '◇';
  color: var(--color-accent);
  font-weight: 600;
  flex-shrink: 0;
  margin-top: 1px;
}

/* Timeline grid cards */
.timeline-blocks {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 18px;
}

.timeline-block {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  background-color: var(--color-cream);
  border: 1px solid var(--border-light);
  border-radius: 8px;
}

.timeline-phase {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 15px;
}

.timeline-date {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
}

/* Insight Box (Light warm border highlight in accent) */
.case-insight {
  padding: 32px;
  background-color: var(--color-cream);
  border-left: 3px solid var(--color-accent); /* Terracotta left border */
  border-radius: 0 12px 12px 0;
  margin-top: 48px;
  box-shadow: var(--shadow-card);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
  border-right: 1px solid var(--border-light);
}

.case-insight h4 {
  font-size: 11px;
  color: var(--text-secondary);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}

.case-insight p {
  font-size: 17px;
  color: var(--text-primary);
  font-weight: 500;
  line-height: 1.6;
  margin: 0;
}

/* ----------------------------------------------------------
   4. Final CTA Section (Light Card)
   ---------------------------------------------------------- */
.cta-final-section {
  padding: 80px 0;
  background-color: var(--color-light);
  border-top: 1px solid var(--border-light);
}

.cta-final-card {
  text-align: center;
  padding: 64px 32px;
  background-color: var(--color-cream);
  border-radius: 12px;
  color: var(--text-primary);
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border-light);
}

.cta-final-card h2 {
  font-family: var(--font-heading);
  font-weight: 400;
  font-size: 32px;
  margin-bottom: 12px;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.cta-final-card p {
  color: var(--text-secondary);
  margin-bottom: 28px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
  font-size: 16px;
}

.cta-final-card .btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
  color: #ffffff;
  height: 44px;
  padding: 0 24px;
  border-radius: 8px;
  background-color: var(--color-dark);
  transition: all 0.3s var(--ease-out-expo);
  white-space: nowrap;
  border: none;
}

.cta-final-card .btn-primary:hover {
  background-color: var(--color-accent);
  transform: translateY(-1px);
}

/* ----------------------------------------------------------
   5. Responsive Styles
   ---------------------------------------------------------- */
@media (max-width: 768px) {
  .case-hero {
    padding: 120px 0 48px;
  }
  .case-title-row {
    flex-direction: column;
    gap: 16px;
  }
  .case-meta {
    grid-template-columns: 1fr 1fr;
    padding: 20px 24px;
    gap: 16px;
  }
  .timeline-block {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
  .cta-final-card {
    padding: 48px 20px;
  }
  .cta-final-card h2 {
    font-size: 24px;
  }
}

@media (max-width: 480px) {
  .case-meta {
    grid-template-columns: 1fr;
  }
  .case-title {
    font-size: 28px;
  }
}