/* ═══════════════════════════════════════════════════════════════
   NUDGEBEE — Case Study Page Styles
   Used by: /case-studies/<slug>/index.html
   ═══════════════════════════════════════════════════════════════ */

/* ── Hero ── */
.cs-hero {
  padding: var(--sp-5xl) 0 var(--sp-3xl);
  background: linear-gradient(160deg, var(--navy-deep) 0%, var(--navy) 100%);
  position: relative;
  overflow: hidden;
}

.cs-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 80% 50%, rgba(56,162,255,0.12) 0%, transparent 70%),
    radial-gradient(ellipse 40% 40% at 10% 80%, rgba(250,200,53,0.06) 0%, transparent 60%);
  pointer-events: none;
}

.cs-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: rgba(255,255,255,0.6);
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: var(--sp-xl);
  transition: color var(--dur-fast);
}
.cs-back:hover { color: rgba(255,255,255,0.9); }
.cs-back svg {
  width: 16px; height: 16px;
  stroke: currentColor;
}

.cs-hero-inner {
  max-width: 760px;
  position: relative;
}

.cs-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: var(--sp-lg);
}

.cs-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--navy);
  background: var(--yellow);
  padding: 4px 12px;
  border-radius: var(--r-pill);
}

.cs-tag-sm {
  font-size: 0.68rem;
  padding: 3px 10px;
}

.cs-hero-title {
  font-family: var(--fh);
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.035em;
  line-height: 1.05;
  margin-bottom: var(--sp-lg);
}

.cs-hero-subtitle {
  display: block;
  color: var(--yellow);
  font-size: clamp(1.4rem, 3vw, 2.2rem);
  font-weight: 600;
  margin-top: 6px;
}

.cs-hero-lead {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.75);
  line-height: 1.7;
  max-width: 640px;
}

/* ── Stats bar ── */
.cs-stats {
  background: var(--white);
  border-bottom: 1px solid var(--border);
  padding: var(--sp-2xl) 0;
}

.cs-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-xl);
  text-align: center;
}

.cs-stat {
  padding: var(--sp-lg);
  border-right: 1px solid var(--border);
}
.cs-stat:last-child { border-right: none; }

.cs-stat-num {
  font-family: var(--fh);
  font-size: clamp(2rem, 3.5vw, 2.8rem);
  font-weight: 800;
  color: var(--navy);
  line-height: 1;
  margin-bottom: 8px;
}

.cs-stat-label {
  font-size: 0.85rem;
  color: var(--muted);
  font-weight: 500;
  line-height: 1.4;
}

/* ── Body layout ── */
.cs-body {
  padding: var(--sp-5xl) 0;
  background: var(--off);
}

.cs-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--sp-3xl);
  align-items: start;
}

/* ── Sidebar ── */
.cs-sidebar {
  position: sticky;
  top: 90px;
  display: flex;
  flex-direction: column;
  gap: var(--sp-md);
}

.cs-sidebar-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: var(--sp-lg);
}

.cs-sidebar-label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin-bottom: 6px;
}

.cs-sidebar-val {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink);
}

.cs-sidebar-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 4px;
}
.cs-sidebar-list li {
  font-size: 0.9rem;
  color: var(--mid);
  padding-left: 14px;
  position: relative;
}
.cs-sidebar-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--purple);
}

.cs-sidebar-cta {
  background: var(--navy);
  border-color: var(--navy);
}
.cs-sidebar-cta p {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.75);
  margin-bottom: var(--sp-md);
  line-height: 1.5;
}

/* ── Article ── */
.cs-article {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3xl);
}

.cs-section {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  padding: var(--sp-2xl) var(--sp-2xl) var(--sp-2xl) var(--sp-xl);
  display: grid;
  grid-template-columns: 4px 1fr;
  gap: var(--sp-xl);
}

.cs-section-marker {
  border-radius: var(--r-pill);
  width: 4px;
  min-height: 100%;
  flex-shrink: 0;
}
.cs-marker-red   { background: #f87171; }
.cs-marker-blue  { background: var(--purple); }
.cs-marker-green { background: #4ade80; }

.cs-section-content {
  min-width: 0;
}

.cs-section-label {
  display: block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--purple);
  margin-bottom: 10px;
}

.cs-section-h {
  font-family: var(--fh);
  font-size: clamp(1.3rem, 2.2vw, 1.65rem);
  font-weight: 800;
  color: var(--ink);
  letter-spacing: -0.025em;
  line-height: 1.2;
  margin-bottom: var(--sp-lg);
}

.cs-section-content p {
  font-size: 1rem;
  color: var(--mid);
  line-height: 1.75;
  margin-bottom: var(--sp-md);
}
.cs-section-content p:last-child { margin-bottom: 0; }

.cs-quote {
  margin: var(--sp-xl) 0;
  padding: var(--sp-lg) var(--sp-xl);
  border-left: 3px solid var(--yellow);
  background: var(--off);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  font-size: 1.05rem;
  font-style: italic;
  color: var(--navy);
  line-height: 1.65;
}

/* ── Feature list ── */
.cs-feature-list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-lg);
  margin-top: var(--sp-xl);
}

.cs-feature-item {
  display: flex;
  gap: var(--sp-lg);
  align-items: flex-start;
}

.cs-feature-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: var(--r-md);
  background: var(--purple-pale);
  display: flex;
  align-items: center;
  justify-content: center;
}
.cs-feature-icon svg {
  width: 20px;
  height: 20px;
  stroke: var(--purple);
}

.cs-feature-item strong {
  display: block;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 4px;
}
.cs-feature-item p {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 0 !important;
}

/* ── Results grid ── */
.cs-results-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-lg);
  margin: var(--sp-xl) 0;
}

.cs-result-card {
  background: var(--off);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: var(--sp-lg);
  text-align: center;
}

.cs-result-num {
  font-family: var(--fh);
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 800;
  line-height: 1;
  margin-bottom: 8px;
}

.cs-result-label {
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.5;
}

/* ── More case studies ── */
.cs-more {
  padding: var(--sp-5xl) 0;
  background: var(--white);
}

.cs-more-h {
  font-family: var(--fh);
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: 800;
  color: var(--ink);
  letter-spacing: -0.03em;
  margin-bottom: var(--sp-2xl);
  text-align: center;
}

.cs-more-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-lg);
}

.cs-more-card {
  display: block;
  background: var(--off);
  border: 1.5px solid var(--border);
  border-radius: var(--r-xl);
  padding: var(--sp-xl);
  transition: border-color var(--dur-fast), transform var(--dur-fast), box-shadow var(--dur-fast);
}
.cs-more-card:hover {
  border-color: var(--purple);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(56,162,255,0.12);
}

.cs-more-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: var(--sp-md);
}

.cs-more-card h3 {
  font-family: var(--fh);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 8px;
}

.cs-more-card p {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: var(--sp-lg);
}

.cs-more-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--purple);
}
.cs-more-link svg {
  width: 14px;
  height: 14px;
  stroke: currentColor;
  stroke-width: 2.5;
  fill: none;
}

/* ── CTA section ── */
.cs-cta {
  background: linear-gradient(135deg, var(--navy-deep) 0%, var(--navy) 100%);
  padding: var(--sp-5xl) 0;
  position: relative;
  overflow: hidden;
}
.cs-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 50% 80% at 80% 50%, rgba(250,200,53,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.cs-cta-inner {
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
  position: relative;
}

.cs-cta-h {
  font-family: var(--fh);
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.03em;
  margin-bottom: var(--sp-md);
  line-height: 1.15;
}

.cs-cta-lead {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.7);
  line-height: 1.7;
  margin-bottom: var(--sp-2xl);
}

.cs-cta-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-lg);
  flex-wrap: wrap;
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .cs-layout {
    grid-template-columns: 240px 1fr;
    gap: var(--sp-2xl);
  }
  .cs-results-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

  .cs-sidebar {
    position: static;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-md);
  }
  .cs-sidebar-cta {
    grid-column: 1 / -1;
  }

  .cs-stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .cs-stat {
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
  .cs-stat:nth-child(3),
  .cs-stat:nth-child(4) { border-bottom: none; }

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

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

  .cs-section {
    grid-template-columns: 4px 1fr;
    padding: var(--sp-lg) var(--sp-lg) var(--sp-lg) var(--sp-md);
    gap: var(--sp-md);
  }
}

@media (max-width: 480px) {
  .cs-sidebar {
    grid-template-columns: 1fr;
  }
  .cs-hero {
    padding: var(--sp-4xl) 0 var(--sp-2xl);
  }
}