/* ─── DEDICATED DEEP-DIVE CASE STUDY STYLES (AEONIK THEME) ─── */
.cs-page-container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 3.5rem 2rem 5rem;
}

.back-nav-bar {
  margin-bottom: 2rem;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-soft);
  text-decoration: none;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: all 0.2s ease;
}

.back-link:hover {
  color: var(--black);
  transform: translateX(-3px);
}

/* Header Area */
.cs-hero-eyebrow {
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-soft);
  margin-bottom: 0.75rem;
  display: block;
}

.cs-hero-title {
  font-size: clamp(2rem, 4.5vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--black);
  margin-bottom: 1rem;
}

.cs-hero-subtitle {
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
}

/* Metadata Strip */
.cs-meta-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  padding: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--gray);
  border-radius: var(--radius-md);
  margin-bottom: 2.5rem;
  box-shadow: var(--shadow-subtle);
}

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

.cs-meta-label {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-soft);
  margin-bottom: 0.25rem;
}

.cs-meta-val {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--black);
  line-height: 1.4;
}

/* Impact Dashboard Grid */
.impact-banner {
  background: var(--black);
  color: var(--white);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  margin-bottom: 3.5rem;
  box-shadow: var(--shadow-card);
}

.impact-banner-head {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-light);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.impact-metrics-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.impact-card {
  border-left: 2px solid rgba(255, 255, 255, 0.15);
  padding-left: 1rem;
}

.impact-val {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--white);
  line-height: 1;
  margin-bottom: 0.35rem;
  display: block;
}

.impact-val.accent {
  color: var(--white);
}

.impact-label {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.45;
}

/* Content Blocks */
.cs-content-block {
  margin-bottom: 3.5rem;
}

.cs-block-tag {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-soft);
  margin-bottom: 0.5rem;
  display: block;
}

.cs-block-heading {
  font-size: 1.7rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--black);
  margin-bottom: 1.25rem;
  line-height: 1.25;
}

.prose {
  font-size: 0.96rem;
  line-height: 1.8;
  color: var(--text-muted);
}

.prose p {
  margin-bottom: 1.25rem;
}

.prose p:last-child {
  margin-bottom: 0;
}

.prose strong {
  color: var(--text-main);
  font-weight: 600;
}

/* System Architecture Diagram Card */
.architecture-box {
  background: var(--surface);
  border: 1px solid var(--gray);
  border-radius: var(--radius-md);
  padding: 2rem;
  margin: 2rem 0;
  box-shadow: var(--shadow-subtle);
}

.arch-header {
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-soft);
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--gray);
  padding-bottom: 0.75rem;
}

.arch-flow {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.arch-step {
  flex: 1;
  min-width: 150px;
  background: var(--gray-light);
  border: 1px solid var(--gray);
  border-radius: var(--radius-sm);
  padding: 1.25rem 1rem;
  text-align: center;
  position: relative;
}

.arch-step-num {
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--black);
  letter-spacing: 0.08em;
  margin-bottom: 0.35rem;
  display: block;
}

.arch-step-title {
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--black);
  margin-bottom: 0.25rem;
}

.arch-step-desc {
  font-size: 0.74rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.arch-arrow {
  color: var(--text-soft);
  font-size: 1.1rem;
  font-weight: 700;
  flex-shrink: 0;
}

/* Before / After Comparison Table */
.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin: 2rem 0;
}

.comp-col {
  background: var(--surface);
  border: 1px solid var(--gray);
  border-radius: var(--radius-md);
  padding: 1.75rem;
}

.comp-col.after {
  border-top: 3px solid var(--black);
}

.comp-col.before {
  border-top: 3px solid var(--text-soft);
}

.comp-col-header {
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--gray);
}

.comp-col.before .comp-col-header {
  color: var(--text-soft);
}

.comp-col.after .comp-col-header {
  color: var(--black);
}

.comp-list {
  list-style: none;
}

.comp-list li {
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--text-muted);
  padding: 0.45rem 0 0.45rem 1.4rem;
  position: relative;
  border-bottom: 1px solid var(--gray-light);
}

.comp-list li:last-child {
  border-bottom: none;
}

.comp-col.before .comp-list li::before {
  content: '✕';
  position: absolute;
  left: 0;
  color: var(--text-soft);
  font-size: 0.75rem;
}

.comp-col.after .comp-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--black);
  font-weight: 800;
  font-size: 0.82rem;
}

/* Key Takeaway Callout Box */
.takeaway-card {
  background: var(--gray-light);
  border: 1px solid var(--gray);
  border-left: 4px solid var(--black);
  border-radius: var(--radius-sm);
  padding: 1.75rem;
  margin: 2.5rem 0;
}

.takeaway-title {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--black);
  margin-bottom: 0.5rem;
}

.takeaway-text {
  font-size: 0.98rem;
  line-height: 1.75;
  color: var(--text-main);
  font-style: italic;
}

/* Bottom Pagination & Next Case Study */
.cs-pagination {
  border-top: 1px solid var(--gray);
  padding-top: 2.5rem;
  margin-top: 4rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.cs-next-card {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  background: var(--surface);
  border: 1px solid var(--gray);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  transition: all 0.2s ease;
  min-width: 280px;
}

.cs-next-card:hover {
  border-color: var(--black);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}

.cs-next-label {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-soft);
  margin-bottom: 0.25rem;
}

.cs-next-title {
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--black);
}

@media (max-width: 768px) {
  .cs-meta-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .impact-metrics-row {
    grid-template-columns: repeat(2, 1fr);
  }
  .comparison-grid {
    grid-template-columns: 1fr;
  }
  .arch-arrow {
    display: none;
  }
}