/* ── 1. GLOBAL ROOT VARIABLES & LIGHT SYSTEM ── */
:root {
  --cs-font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --cs-font-heading: 'Inter Tight', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --cs-bg: #FFFFFF;
  --cs-bg-subtle: #FAF9FC;
  --cs-bg-alt: #F1F5F9;
  --cs-text-main: #0F172A;
  --cs-text-body: #475569;
  --cs-text-muted: #64748B;
  --cs-border: #E2E8F0;
  --cs-border-light: #F1F5F9;
  --cs-purple: #7C3AED;
  --cs-purple-light: #F3E8FF;
  --cs-pink: #EC4899;
  --cs-orange: #F59E0B;
  --cs-brand-gradient: linear-gradient(135deg, #7C3AED 0%, #EC4899 50%, #F59E0B 100%);
  --cs-brand-gradient-soft: linear-gradient(135deg, rgba(124, 58, 237, 0.08) 0%, rgba(236, 72, 153, 0.08) 50%, rgba(245, 158, 11, 0.08) 100%);
  --cs-card-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05), 0 2px 6px -1px rgba(15, 23, 42, 0.03);
  --cs-card-hover-shadow: 0 20px 45px -12px rgba(124, 58, 237, 0.18), 0 10px 20px -5px rgba(15, 23, 42, 0.06);
  --cs-radius-lg: 24px;
  --cs-radius-md: 16px;
  --cs-radius-sm: 8px;
}

.cs-gradient-text {
  background: linear-gradient(135deg, #7C3AED 0%, #EC4899 50%, #F59E0B 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
}

/* ── 2. HERO SECTION (LISTING PAGE) ── */
.cs-listing-hero {
  padding: 90px 0 50px 0;
  background: linear-gradient(180deg, #FAF5FF 0%, #FFFFFF 100%);
  border-bottom: 1px solid var(--cs-border-light);
  text-align: center;
  position: relative;
  font-family: var(--cs-font-body);
}

.cs-hero-container {
  max-width: 740px;
  margin: 0 auto;
  padding: 0 24px;
}

.cs-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  border-radius: 9999px;
  background: rgba(124, 58, 237, 0.08);
  border: 1px solid rgba(124, 58, 237, 0.2);
  color: var(--cs-purple);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 20px;
}

.cs-hero-title {
  font-size: 48px;
  font-weight: 800;
  color: var(--cs-text-main);
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 18px;
  font-family: var(--cs-font-heading);
}

@media (max-width: 768px) {
  .cs-hero-title { font-size: 34px; }
}

.cs-hero-sub {
  font-size: 19px;
  color: var(--cs-text-body);
  line-height: 1.6;
  margin: 0 auto;
}

/* ── 3. HORIZONTAL FILTER CHIPS ── */
.cs-filter-section {
  padding: 36px 0 20px 0;
  background: #FFFFFF;
}

.cs-filter-chips-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  max-width: 900px;
  margin: 0 auto;
}

.cs-chip-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 9999px;
  background: var(--cs-bg-subtle);
  border: 1px solid var(--cs-border);
  font-size: 14px;
  font-weight: 600;
  color: var(--cs-text-body);
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  user-select: none;
}

.cs-chip-btn:hover {
  background: #FFFFFF;
  color: var(--cs-text-main);
  border-color: rgba(124, 58, 237, 0.3);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.cs-chip-btn.active {
  background: #FFFFFF;
  color: var(--cs-purple);
  border-color: var(--cs-purple);
  box-shadow: 0 4px 16px rgba(124, 58, 237, 0.15);
  font-weight: 700;
}

.cs-chip-count {
  font-size: 12px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 9999px;
  background: var(--cs-bg-alt);
  color: var(--cs-text-muted);
}

.cs-chip-btn.active .cs-chip-count {
  background: var(--cs-purple-light);
  color: var(--cs-purple);
}

/* ── 4. FEATURED CASE STUDY CARD (60% IMAGE / 40% CONTENT) ── */
.cs-listing-main {
  padding: 30px 0 100px 0;
  background: #FFFFFF;
}

.cs-featured-card {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  background: #FFFFFF;
  border: 1px solid var(--cs-border);
  border-radius: var(--cs-radius-lg);
  overflow: hidden;
  box-shadow: var(--cs-card-shadow);
  margin-bottom: 48px;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  text-decoration: none;
  color: inherit;
}

.cs-featured-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--cs-card-hover-shadow);
  border-color: rgba(124, 58, 237, 0.35);
}

@media (max-width: 900px) {
  .cs-featured-card {
    grid-template-columns: 1fr;
  }
}

.cs-featured-img-wrap {
  position: relative;
  width: 100%;
  min-height: 380px;
  background: #F8FAFC;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cs-featured-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}

.cs-featured-card:hover .cs-featured-img-wrap img {
  transform: scale(1.03);
}

.cs-featured-body {
  padding: 44px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

@media (max-width: 768px) {
  .cs-featured-body { padding: 28px; }
}

.cs-card-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--cs-purple);
  background: var(--cs-purple-light);
  padding: 5px 14px;
  border-radius: 9999px;
  margin-bottom: 18px;
  width: fit-content;
}

.cs-featured-title {
  font-size: 28px;
  font-weight: 800;
  color: var(--cs-text-main);
  line-height: 1.28;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.cs-featured-summary {
  font-size: 15px;
  color: var(--cs-text-body);
  line-height: 1.65;
  margin-bottom: 24px;
}

.cs-result-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--cs-radius-md);
  background: var(--cs-brand-gradient-soft);
  border: 1px solid rgba(124, 58, 237, 0.18);
  color: var(--cs-text-main);
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 28px;
}

.cs-result-pill strong {
  color: var(--cs-purple);
  font-size: 18px;
}

.cs-card-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 700;
  color: var(--cs-purple);
  transition: gap 0.2s ease;
}

.cs-featured-card:hover .cs-card-cta-btn {
  gap: 12px;
}

/* ── 5. CLEAN 2-COLUMN CASE STUDIES GRID ── */
.cs-cards-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 36px;
}

@media (max-width: 840px) {
  .cs-cards-grid {
    grid-template-columns: 1fr;
  }
}

.cs-card {
  background: #FFFFFF;
  border: 1px solid var(--cs-border);
  border-radius: var(--cs-radius-lg);
  overflow: hidden;
  box-shadow: var(--cs-card-shadow);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  text-decoration: none;
  color: inherit;
  height: 100%;
}

.cs-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--cs-card-hover-shadow);
  border-color: rgba(124, 58, 237, 0.35);
}

.cs-card-thumb {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #F8FAFC;
  overflow: hidden;
}

.cs-card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}

.cs-card:hover .cs-card-thumb img {
  transform: scale(1.04);
}

.cs-card-body {
  padding: 32px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  justify-content: space-between;
}

.cs-card-meta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.cs-card-company-name {
  font-size: 13px;
  font-weight: 700;
  color: var(--cs-text-muted);
}

.cs-card-headline {
  font-size: 21px;
  font-weight: 800;
  color: var(--cs-text-main);
  line-height: 1.35;
  letter-spacing: -0.01em;
  margin-bottom: 14px;
}

.cs-card-desc {
  font-size: 14px;
  color: var(--cs-text-body);
  line-height: 1.6;
  margin-bottom: 20px;
}

.cs-card-metric-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--cs-purple);
  background: rgba(124, 58, 237, 0.06);
  border-left: 3px solid var(--cs-purple);
  padding: 8px 14px;
  border-radius: 0 8px 8px 0;
  font-weight: 700;
  margin-bottom: 24px;
}

.cs-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 18px;
  border-top: 1px solid var(--cs-border-light);
}

/* ── 6. INDIVIDUAL CASE STUDY ARTICLE TEMPLATE ── */
.cs-article-wrap {
  padding: 60px 0 100px 0;
  background: #FFFFFF;
}

.cs-article-hero {
  text-align: center;
  max-width: 920px;
  margin: 0 auto 40px auto;
}

.cs-article-title {
  font-size: 46px;
  font-weight: 800;
  color: var(--cs-text-main);
  letter-spacing: -0.03em;
  line-height: 1.18;
  margin-bottom: 20px;
}

@media (max-width: 768px) {
  .cs-article-title { font-size: 32px; }
}

.cs-article-exec-lead {
  font-size: 20px;
  color: var(--cs-text-body);
  line-height: 1.6;
  margin-bottom: 28px;
}

.cs-article-meta-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  font-size: 14px;
  color: var(--cs-text-muted);
  flex-wrap: wrap;
}

.cs-article-hero-img-box {
  max-width: 1060px;
  margin: 0 auto 60px auto;
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 0 20px 50px -15px rgba(15, 23, 42, 0.12);
  border: 1px solid var(--cs-border);
  aspect-ratio: 16 / 9;
}

.cs-article-hero-img-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ── 7. EXECUTIVE SUMMARY HIGHLIGHT CARD ── */
.cs-exec-summary-card {
  max-width: 960px;
  margin: 0 auto 70px auto;
  background: linear-gradient(135deg, #FFFFFF 0%, #FAF5FF 100%);
  border: 1px solid rgba(124, 58, 237, 0.2);
  border-radius: var(--cs-radius-lg);
  padding: 40px;
  box-shadow: 0 10px 30px -10px rgba(124, 58, 237, 0.08);
}

.cs-exec-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

@media (max-width: 768px) {
  .cs-exec-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.cs-exec-item-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--cs-text-muted);
  margin-bottom: 6px;
}

.cs-exec-item-val {
  font-size: 16px;
  font-weight: 700;
  color: var(--cs-text-main);
}

.cs-exec-item-val.highlight {
  color: var(--cs-purple);
}

/* ── 8. CLIENT OVERVIEW SECTION ── */
.cs-section-box {
  max-width: 920px;
  margin: 0 auto 70px auto;
}

.cs-section-heading {
  font-size: 32px;
  font-weight: 800;
  color: var(--cs-text-main);
  letter-spacing: -0.02em;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.cs-client-card {
  background: var(--cs-bg-subtle);
  border: 1px solid var(--cs-border);
  border-radius: var(--cs-radius-lg);
  padding: 36px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

@media (max-width: 768px) {
  .cs-client-card {
    grid-template-columns: 1fr;
  }
}

.cs-client-overview-text p {
  font-size: 16px;
  color: var(--cs-text-body);
  line-height: 1.7;
  margin-bottom: 16px;
}

.cs-client-pain-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.cs-pain-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: #991B1B;
  background: #FEF2F2;
  border: 1px solid #FCA5A5;
  padding: 10px 14px;
  border-radius: var(--cs-radius-md);
  font-weight: 600;
}

.cs-goal-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: #065F46;
  background: #ECFDF5;
  border: 1px solid #6EE7B7;
  padding: 10px 14px;
  border-radius: var(--cs-radius-md);
  font-weight: 600;
}

/* ── 9. WORKFLOW INFOGRAPHIC ── */
.cs-workflow-container {
  background: linear-gradient(180deg, #FAF5FF 0%, #FFFFFF 100%);
  border: 1px solid var(--cs-border);
  border-radius: 24px;
  padding: 40px 24px;
  margin: 40px 0;
  text-align: center;
}

.cs-workflow-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 30px;
}

.cs-wf-node {
  background: #FFFFFF;
  border: 1px solid rgba(124, 58, 237, 0.25);
  box-shadow: 0 4px 15px rgba(124, 58, 237, 0.08);
  padding: 14px 20px;
  border-radius: 14px;
  font-size: 14px;
  font-weight: 700;
  color: var(--cs-text-main);
  display: flex;
  align-items: center;
  gap: 8px;
}

.cs-wf-arrow {
  color: var(--cs-purple);
  font-size: 20px;
  font-weight: 800;
}

/* ── 10. ANIMATED KPI RESULTS GRID ── */
.cs-kpi-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin: 40px 0 60px 0;
}

@media (max-width: 768px) {
  .cs-kpi-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.cs-kpi-card {
  background: #FFFFFF;
  border: 1px solid var(--cs-border);
  border-radius: var(--cs-radius-lg);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--cs-card-shadow);
  position: relative;
  overflow: hidden;
}

.cs-kpi-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--cs-brand-gradient);
}

.cs-kpi-num {
  font-size: 48px;
  font-weight: 900;
  color: var(--cs-text-main);
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 10px;
  background: var(--cs-brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.cs-kpi-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--cs-text-body);
}

/* ── 11. BEFORE VS AFTER COMPARISON TABLE ── */
.cs-comparison-table-wrap {
  overflow-x: auto;
  margin: 40px 0 60px 0;
  border: 1px solid var(--cs-border);
  border-radius: var(--cs-radius-lg);
  box-shadow: var(--cs-card-shadow);
}

.cs-comp-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 15px;
}

.cs-comp-table th {
  background: var(--cs-bg-subtle);
  padding: 18px 24px;
  font-weight: 700;
  color: var(--cs-text-main);
  border-bottom: 1px solid var(--cs-border);
}

.cs-comp-table td {
  padding: 18px 24px;
  border-bottom: 1px solid var(--cs-border-light);
  color: var(--cs-text-body);
  vertical-align: middle;
}

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

.cs-comp-before {
  color: #991B1B;
  background: #FEF2F2;
  font-weight: 500;
}

.cs-comp-after {
  color: #065F46;
  background: #ECFDF5;
  font-weight: 700;
}

/* ── 12. TESTIMONIAL QUOTE BLOCK ── */
.cs-quote-block {
  background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
  color: #FFFFFF;
  border-radius: 24px;
  padding: 48px;
  margin: 60px 0;
  position: relative;
  box-shadow: 0 20px 40px rgba(15, 23, 42, 0.15);
}

.cs-quote-text {
  font-size: 22px;
  font-weight: 500;
  line-height: 1.6;
  margin-bottom: 32px;
  font-style: italic;
  color: #F8FAFC;
}

.cs-quote-author {
  display: flex;
  align-items: center;
  gap: 16px;
}

.cs-quote-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--cs-purple);
}

.cs-author-name {
  font-size: 18px;
  font-weight: 700;
  color: #FFFFFF;
}

.cs-author-role {
  font-size: 14px;
  color: #94A3B8;
}

/* ── 13. PRODUCTS USED & KEY TAKEAWAYS ── */
.cs-products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 24px;
}

@media (max-width: 768px) {
  .cs-products-grid {
    grid-template-columns: 1fr;
  }
}

.cs-product-mini-card {
  background: #FFFFFF;
  border: 1px solid var(--cs-border);
  border-radius: var(--cs-radius-md);
  padding: 20px;
  text-decoration: none;
  color: inherit;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.cs-product-mini-card:hover {
  border-color: var(--cs-purple);
  box-shadow: 0 4px 15px rgba(124, 58, 237, 0.1);
  transform: translateY(-2px);
}

.cs-takeaways-box {
  background: var(--cs-purple-light);
  border: 1px solid rgba(124, 58, 237, 0.2);
  border-radius: var(--cs-radius-lg);
  padding: 32px;
  margin: 40px 0;
}

.cs-takeaways-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 16px;
}

@media (max-width: 768px) {
  .cs-takeaways-list {
    grid-template-columns: 1fr;
  }
}

.cs-takeaway-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 700;
  color: var(--cs-text-main);
}

.cs-takeaway-icon {
  color: var(--cs-purple);
  font-weight: 900;
  font-size: 18px;
}

/* ── 14. REUSABLE PREMIUM CTA CARD ── */
.section-spacing-cta {
  padding: 20px 0 60px 0;
  background: transparent;
}

.cs-cta-card {
  max-width: 1160px;
  margin: 40px auto 40px auto;
  background: linear-gradient(135deg, #090518 0%, #170C36 50%, #291252 100%);
  border-radius: 32px;
  padding: 84px 60px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 25px 50px -12px rgba(11, 7, 30, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.cs-cta-glow {
  position: absolute;
  top: -40%;
  right: -15%;
  width: 450px;
  height: 450px;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.28) 0%, rgba(236, 72, 153, 0) 70%);
  pointer-events: none;
  border-radius: 50%;
}

.cs-cta-title {
  font-size: 42px;
  font-weight: 800;
  color: #FFFFFF;
  letter-spacing: -0.03em;
  line-height: 1.2;
  max-width: 680px;
  margin: 0 auto 20px auto;
  font-family: var(--cs-font-heading);
}

.cs-cta-desc {
  font-size: 17px;
  color: #94A3B8;
  line-height: 1.65;
  max-width: 640px;
  margin: 0 auto 36px auto;
  font-weight: 400;
}

.cs-cta-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.cs-cta-btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 15px 34px;
  border-radius: 9999px;
  background: linear-gradient(135deg, #7C3AED 0%, #EC4899 100%);
  color: #FFFFFF;
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.25s ease;
  box-shadow: 0 8px 25px -4px rgba(236, 72, 153, 0.4);
}

.cs-cta-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px -4px rgba(236, 72, 153, 0.55);
  color: #FFFFFF;
}

.cs-cta-btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 15px 34px;
  border-radius: 9999px;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.28);
  color: #FFFFFF;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.25s ease;
}

.cs-cta-btn-secondary:hover {
  border-color: #FFFFFF;
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-2px);
  color: #FFFFFF;
}

@media (max-width: 768px) {
  .cs-cta-card {
    padding: 56px 24px;
    border-radius: 24px;
    margin: 30px auto 40px auto;
  }
  .cs-cta-title { font-size: 28px; }
  .cs-cta-desc { font-size: 15px; }
  .cs-cta-actions {
    flex-direction: column;
    width: 100%;
  }
  .cs-cta-btn-primary, .cs-cta-btn-secondary {
    width: 100%;
  }
}