/* ============================================
   CASE STUDY PAGE STYLES
   ============================================ */

/* Hero */
.cs-hero {
  padding: 48px 0 64px;
  background: var(--color-off-white);
  border-bottom: 1px solid var(--color-gray-100);
}

.cs-back {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-primary);
  margin-bottom: 32px;
  transition: gap 0.2s ease;
}
.cs-back:hover {
  gap: 8px;
}

.cs-hero-header {
  margin-bottom: 24px;
}

.cs-client-logo {
  height: 36px;
  width: auto;
  object-fit: contain;
}

.cs-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--color-gray-900);
  margin-bottom: 16px;
  max-width: 720px;
}

.cs-subtitle {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--color-gray-600);
  max-width: 640px;
  margin-bottom: 32px;
}

/* Meta strip */
.cs-meta {
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
  padding-top: 24px;
  border-top: 1px solid var(--color-gray-100);
}

.cs-meta-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.cs-meta-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-gray-400);
}

.cs-meta-value {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-gray-900);
}


/* Content */
.cs-content {
  padding: 64px 0;
  background: var(--color-white);
}

.cs-container {
  max-width: 780px;
}

.cs-section {
  margin-bottom: 56px;
}
.cs-section:last-child {
  margin-bottom: 0;
}

.cs-section h2 {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-gray-900);
  margin-bottom: 20px;
}

.cs-section p {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-gray-600);
  margin-bottom: 16px;
}
.cs-section p:last-child {
  margin-bottom: 0;
}

.cs-section ul {
  list-style: none;
  padding: 0;
  margin: 0 0 16px;
}

.cs-section ul li {
  position: relative;
  padding-left: 24px;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-gray-600);
  margin-bottom: 8px;
}
.cs-section ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 11px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-primary);
  opacity: 0.5;
}


/* Approach grid */
.cs-approach-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 24px;
}

.cs-approach-card {
  padding: 28px;
  background: var(--color-off-white);
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-md);
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}
.cs-approach-card:hover {
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.05);
  transform: translateY(-2px);
}

.cs-approach-num {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-primary);
  opacity: 0.5;
  margin-bottom: 12px;
  letter-spacing: 0.04em;
}

.cs-approach-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: 8px;
}

.cs-approach-card p {
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--color-gray-600);
  margin-bottom: 0;
}


/* Results grid */
.cs-results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-top: 24px;
}

.cs-result-card {
  text-align: center;
  padding: 28px 16px;
  background: var(--color-off-white);
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.cs-result-number {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

.cs-result-label {
  font-size: 0.8rem;
  line-height: 1.4;
  color: var(--color-gray-600);
}


/* Testimonial */
.cs-testimonial {
  border: none;
  margin: 0;
  padding: 40px;
  background: var(--color-gray-900);
  border-radius: var(--radius-lg);
  position: relative;
}

.cs-testimonial p {
  font-size: 1.1rem;
  font-style: italic;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 24px;
}

.cs-testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.cs-testimonial-avatar {
  width: 44px;
  height: 44px;
  min-width: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
}

.cs-testimonial-author strong {
  display: block;
  font-size: 0.9rem;
  color: var(--color-white);
}

.cs-testimonial-author span {
  font-size: 0.8rem;
  color: var(--color-gray-400);
}


/* CTA Section */
.cs-cta-section {
  text-align: center;
  padding: 48px;
  background: var(--color-off-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-gray-100);
}

.cs-cta-section h2 {
  margin-bottom: 12px;
}

.cs-cta-section p {
  max-width: 480px;
  margin: 0 auto 24px;
}


/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
  .cs-hero {
    padding: 32px 0 48px;
  }

  .cs-meta {
    gap: 24px;
  }

  .cs-approach-grid {
    grid-template-columns: 1fr;
  }

  .cs-results-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .cs-testimonial {
    padding: 28px;
  }

  .cs-cta-section {
    padding: 32px 24px;
  }
}

@media (max-width: 480px) {
  .cs-results-grid {
    grid-template-columns: 1fr;
  }

  .cs-meta {
    flex-direction: column;
    gap: 16px;
  }
}