/* ==========================================================================
   case-study.css - Premium Single Case Study Experience
   Zenerom UAE Digital Marketing & Technology Agency
   ========================================================================== */

:root {
  --cs-bg: #ffffff;
  --cs-bg-subtle: #f9f9fb;
  --cs-bg-card: #ffffff;
  --cs-border: rgba(12, 2, 56, 0.07);
  --cs-border-light: rgba(12, 2, 56, 0.04);
  --cs-text-primary: #0a0a0a;
  --cs-text-secondary: #4a5568;
  --cs-text-muted: #718096;
  --cs-accent: #f26934;
  --cs-accent-glow: rgba(242, 105, 52, 0.16);
  --cs-accent-subtle: rgba(242, 105, 52, 0.06);
  --cs-radius-lg: 24px;
  --cs-radius-md: 16px;
  --cs-radius-sm: 10px;
}

/* --------------------------------------------------------------------------
   1. Reading Progress Bar
   -------------------------------------------------------------------------- */
.cs-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--brand-flamingo, #f26934), #ff8a50);
  z-index: 99999;
  transition: width 0.1s linear;
}

/* --------------------------------------------------------------------------
   2. Page Container & Hero Layout
   -------------------------------------------------------------------------- */
.cs-single-page {
  position: relative;
  width: 100%;
  background-color: var(--cs-bg);
  overflow-x: hidden;
}

.cs-container {
  width: 100%;
  max-width: 1240px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* Hero Section */
.cs-hero {
  padding-top: 130px;
  padding-bottom: 40px;
  background: radial-gradient(circle at 80% 20%, rgba(242, 105, 52, 0.04) 0%, transparent 60%),
              radial-gradient(circle at 10% 80%, rgba(12, 2, 56, 0.02) 0%, transparent 50%),
              #ffffff;
  position: relative;
}

.cs-breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.84rem;
  color: var(--cs-text-muted);
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.cs-breadcrumbs a {
  color: var(--cs-text-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

.cs-breadcrumbs a:hover {
  color: var(--cs-accent);
}

.cs-breadcrumbs-sep {
  color: #cbd5e1;
  font-size: 0.75rem;
}

.cs-breadcrumbs-current {
  color: var(--cs-text-primary);
  font-weight: 600;
}

.cs-eyebrow-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

.cs-eyebrow-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.4rem 1rem;
  border-radius: 9999px;
  background-color: var(--brand-black-rock, #0c0238);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.cs-eyebrow-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--cs-accent);
  animation: csPulse 2s infinite ease-in-out;
}

@keyframes csPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.35; transform: scale(0.85); }
}

.cs-timeline-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.85rem;
  border-radius: 9999px;
  background-color: var(--cs-bg-subtle);
  border: 1px solid var(--cs-border);
  color: var(--cs-text-secondary);
  font-size: 0.75rem;
  font-weight: 600;
}

.cs-hero-title {
  font-size: clamp(2.2rem, 4.2vw, 3.85rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.035em;
  color: var(--cs-text-primary);
  margin: 0 0 1.25rem;
  max-width: 1050px;
}

.cs-hero-summary {
  font-size: clamp(1.05rem, 1.4vw, 1.28rem);
  line-height: 1.65;
  color: var(--cs-text-secondary);
  margin: 0 0 2rem;
  max-width: 900px;
}

/* Key Metadata Strip */
.cs-meta-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.25rem;
  padding: 1.5rem 1.75rem;
  background: #ffffff;
  border: 1px solid var(--cs-border);
  border-radius: var(--cs-radius-md);
  margin-bottom: 2rem;
}

.cs-meta-item {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.cs-meta-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--cs-text-muted);
}

.cs-meta-value {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--cs-text-primary);
}

.cs-meta-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.cs-meta-tag {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  background-color: var(--cs-bg-subtle);
  border-radius: 6px;
  font-size: 0.75rem;
  color: var(--cs-text-secondary);
  font-weight: 500;
}

/* --------------------------------------------------------------------------
   3. Highlight Metrics Banner
   -------------------------------------------------------------------------- */
.cs-metrics-banner {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}

.cs-metric-card {
  padding: 1.85rem 1.5rem;
  background: linear-gradient(145deg, #ffffff 0%, var(--cs-bg-subtle) 100%);
  border: 1px solid var(--cs-border);
  border-radius: var(--cs-radius-md);
  text-align: center;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.cs-metric-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--cs-accent);
  opacity: 0.8;
}

.cs-metric-card:hover {
  transform: translateY(-3px);
  border-color: rgba(242, 105, 52, 0.3);
}

.cs-metric-number {
  font-size: clamp(2.2rem, 3.8vw, 3.25rem);
  font-weight: 900;
  color: var(--cs-accent);
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 0.4rem;
}

.cs-metric-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--cs-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* --------------------------------------------------------------------------
   4. Hero Visual Showcase
   -------------------------------------------------------------------------- */
.cs-visual-showcase {
  position: relative;
  width: 100%;
  border-radius: var(--cs-radius-lg);
  overflow: hidden;
  background-color: #0c0238;
  margin-bottom: 4rem;
  box-shadow: 0 20px 45px -15px rgba(12, 2, 56, 0.12);
  border: 1px solid rgba(12, 2, 56, 0.08);
}

.cs-visual-img {
  width: 100%;
  height: auto;
  max-height: 560px;
  object-fit: cover;
  display: block;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.cs-visual-showcase:hover .cs-visual-img {
  transform: scale(1.02);
}

.cs-visual-badge {
  position: absolute;
  bottom: 1.5rem;
  left: 1.5rem;
  background: rgba(12, 2, 56, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: #ffffff;
  padding: 0.55rem 1.1rem;
  border-radius: 9999px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.cs-visual-badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: #10b981;
}

/* --------------------------------------------------------------------------
   5. Deep-Dive Body Layout (2 Columns)
   -------------------------------------------------------------------------- */
.cs-body-layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 3.5rem;
  align-items: start;
  margin-bottom: 5rem;
}

/* Sticky Sidebar */
.cs-sidebar {
  position: sticky;
  top: 100px;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.cs-sidebar-card {
  background: #ffffff;
  border: 1px solid var(--cs-border);
  border-radius: var(--cs-radius-md);
  padding: 1.5rem;
}

.cs-sidebar-title {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--cs-text-muted);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.cs-toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.cs-toc-link {
  display: block;
  font-size: 0.875rem;
  color: var(--cs-text-secondary);
  text-decoration: none;
  padding: 0.4rem 0.6rem;
  border-radius: 6px;
  transition: all 0.2s ease;
  border-left: 2px solid transparent;
}

.cs-toc-link:hover,
.cs-toc-link.is-active {
  color: var(--cs-accent);
  background-color: var(--cs-accent-subtle);
  border-left-color: var(--cs-accent);
  padding-left: 0.8rem;
  font-weight: 600;
}

/* Sidebar CTA Card */
.cs-sidebar-cta {
  background: linear-gradient(145deg, #0c0238 0%, #17075c 100%);
  border-radius: var(--cs-radius-md);
  padding: 1.75rem 1.5rem;
  color: #ffffff;
  text-align: left;
}

.cs-sidebar-cta-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0 0 0.5rem;
  color: #ffffff;
}

.cs-sidebar-cta-desc {
  font-size: 0.84rem;
  line-height: 1.55;
  color: #cbd5e1;
  margin: 0 0 1.25rem;
}

.cs-sidebar-cta-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.75rem 1rem;
  background-color: var(--cs-accent);
  color: #ffffff;
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 700;
  border-radius: 8px;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.cs-sidebar-cta-btn:hover {
  background-color: #d85724;
  transform: translateY(-2px);
}

.cs-sidebar-wa-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  margin-top: 0.6rem;
  padding: 0.7rem 1rem;
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 600;
  border-radius: 8px;
  transition: background 0.2s ease;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.cs-sidebar-wa-btn:hover {
  background: rgba(255, 255, 255, 0.18);
}

/* --------------------------------------------------------------------------
   6. Main Content Sections
   -------------------------------------------------------------------------- */
.cs-main-content {
  display: flex;
  flex-direction: column;
  gap: 3.5rem;
}

.cs-section {
  scroll-margin-top: 120px;
}

.cs-section-header {
  margin-bottom: 1.5rem;
}

.cs-section-eyebrow {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--cs-accent);
  margin-bottom: 0.4rem;
  display: block;
}

.cs-section-title {
  font-size: clamp(1.65rem, 2.5vw, 2.15rem);
  font-weight: 800;
  color: var(--cs-text-primary);
  line-height: 1.25;
  margin: 0;
  letter-spacing: -0.025em;
}

/* Challenge Callout Card */
.cs-challenge-card {
  padding: 2rem;
  background-color: #fff9f6;
  border: 1px solid rgba(242, 105, 52, 0.18);
  border-radius: var(--cs-radius-md);
  position: relative;
  margin-bottom: 1.5rem;
}

.cs-challenge-desc {
  font-size: 1.05rem;
  line-height: 1.7;
  color: #334155;
  margin: 0;
}

/* Strategic Solution Steps */
.cs-steps-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.cs-step-card {
  padding: 1.75rem;
  background: #ffffff;
  border: 1px solid var(--cs-border);
  border-radius: var(--cs-radius-md);
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 1.5rem;
  align-items: start;
  transition: all 0.3s ease;
}

.cs-step-card:hover {
  border-color: rgba(242, 105, 52, 0.35);
  transform: translateY(-2px);
  box-shadow: 0 10px 25px -10px rgba(12, 2, 56, 0.06);
}

.cs-step-badge {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background-color: var(--brand-black-rock, #0c0238);
  color: var(--cs-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  flex-shrink: 0;
}

.cs-step-heading {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--cs-text-primary);
  margin: 0 0 0.5rem;
}

.cs-step-desc {
  font-size: 0.94rem;
  line-height: 1.65;
  color: var(--cs-text-secondary);
  margin: 0;
}

/* Secondary Visual / Showcase */
.cs-secondary-visual-wrap {
  margin-top: 2rem;
  border-radius: var(--cs-radius-md);
  overflow: hidden;
  border: 1px solid var(--cs-border);
  box-shadow: 0 12px 30px -10px rgba(12, 2, 56, 0.08);
}

.cs-secondary-visual-img {
  width: 100%;
  height: auto;
  max-height: 420px;
  object-fit: cover;
  display: block;
}

/* Tech Stack & Deliverables Grid */
.cs-stack-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1rem;
}

.cs-stack-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.15rem;
  background: var(--cs-bg-subtle);
  border: 1px solid var(--cs-border);
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--cs-text-primary);
  transition: all 0.2s ease;
}

.cs-stack-chip:hover {
  background: #ffffff;
  border-color: var(--cs-accent);
  color: var(--cs-accent);
  transform: translateY(-2px);
}

.cs-stack-check {
  color: var(--cs-accent);
  font-weight: 800;
}

/* Quantified Results Grid */
.cs-results-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-top: 1.25rem;
}

.cs-result-box {
  padding: 1.75rem 1.25rem;
  background: linear-gradient(135deg, #0c0238 0%, #1a0868 100%);
  border-radius: var(--cs-radius-md);
  color: #ffffff;
  text-align: center;
}

.cs-result-num {
  font-size: clamp(2rem, 3.2vw, 2.75rem);
  font-weight: 900;
  color: var(--cs-accent);
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 0.4rem;
}

.cs-result-lbl {
  font-size: 0.82rem;
  font-weight: 600;
  color: #e2e8f0;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Testimonial Quote Box */
.cs-testimonial-card {
  padding: 2.25rem;
  background: radial-gradient(circle at 10% 20%, rgba(242, 105, 52, 0.05) 0%, transparent 60%),
              #ffffff;
  border: 1px solid var(--cs-border);
  border-left: 4px solid var(--cs-accent);
  border-radius: var(--cs-radius-md);
  position: relative;
  margin-top: 1.5rem;
}

.cs-quote-icon {
  font-size: 2.5rem;
  line-height: 1;
  color: var(--cs-accent);
  opacity: 0.4;
  margin-bottom: 0.75rem;
  font-family: Georgia, serif;
}

.cs-quote-text {
  font-size: 1.15rem;
  line-height: 1.65;
  color: var(--cs-text-primary);
  font-style: italic;
  font-weight: 500;
  margin: 0 0 1.5rem;
}

.cs-quote-author {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.cs-author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--brand-black-rock, #0c0238);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  font-weight: 700;
}

.cs-author-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--cs-text-primary);
}

.cs-author-role {
  font-size: 0.82rem;
  color: var(--cs-text-muted);
}

.cs-stars-row {
  margin-left: auto;
  color: #f59e0b;
  font-size: 0.9rem;
  letter-spacing: 2px;
}

/* --------------------------------------------------------------------------
   7. Next Project Navigation Card
   -------------------------------------------------------------------------- */
.cs-next-wrap {
  padding: 4rem 0 2rem;
  border-top: 1px solid var(--cs-border);
}

.cs-next-card {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 2rem;
  padding: 2.25rem 2.5rem;
  background: linear-gradient(135deg, #0c0238 0%, #16075c 100%);
  border-radius: var(--cs-radius-lg);
  color: #ffffff;
  text-decoration: none;
  align-items: center;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.cs-next-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 25px 50px -15px rgba(12, 2, 56, 0.3);
}

.cs-next-eyebrow {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--cs-accent);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.cs-next-title {
  font-size: clamp(1.4rem, 2.2vw, 1.95rem);
  font-weight: 800;
  color: #ffffff;
  line-height: 1.25;
  margin: 0 0 1rem;
}

.cs-next-arrow-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.9rem;
  font-weight: 700;
  color: #ffffff;
  transition: gap 0.2s ease;
}

.cs-next-card:hover .cs-next-arrow-btn {
  gap: 0.9rem;
  color: var(--cs-accent);
}

.cs-next-thumb {
  width: 100%;
  height: 180px;
  border-radius: var(--cs-radius-md);
  object-fit: cover;
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.4);
}

/* --------------------------------------------------------------------------
   8. Related Case Studies Grid
   -------------------------------------------------------------------------- */
.cs-related-section {
  padding: 4rem 0 5rem;
  background-color: var(--cs-bg-subtle);
}

.cs-related-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.cs-related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.cs-related-card {
  background: #ffffff;
  border: 1px solid var(--cs-border);
  border-radius: var(--cs-radius-md);
  overflow: hidden;
  text-decoration: none;
  display: flex;
  flex-direction: column;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.cs-related-card:hover {
  transform: translateY(-5px);
  border-color: rgba(242, 105, 52, 0.3);
  box-shadow: 0 15px 35px -10px rgba(12, 2, 56, 0.08);
}

.cs-related-img-wrap {
  width: 100%;
  height: 220px;
  position: relative;
  overflow: hidden;
  background-color: #0c0238;
}

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

.cs-related-card:hover .cs-related-img {
  transform: scale(1.05);
}

.cs-related-category-tag {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background: rgba(12, 2, 56, 0.85);
  backdrop-filter: blur(8px);
  color: #ffffff;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.3rem 0.75rem;
  border-radius: 9999px;
}

.cs-related-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.cs-related-client {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--cs-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.4rem;
}

.cs-related-card-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--cs-text-primary);
  line-height: 1.35;
  margin: 0 0 0.85rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.cs-related-metric {
  display: inline-block;
  align-self: flex-start;
  padding: 0.3rem 0.75rem;
  background-color: var(--cs-accent-subtle);
  border: 1px solid rgba(242, 105, 52, 0.2);
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--cs-accent);
  margin-top: auto;
}

/* --------------------------------------------------------------------------
   9. Responsive Breakpoints
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .cs-body-layout {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .cs-sidebar {
    position: static;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
  }

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

  .cs-next-thumb {
    height: 200px;
  }

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

@media (max-width: 768px) {
  .cs-hero {
    padding-top: 110px;
    padding-bottom: 30px;
  }

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

  .cs-metrics-banner,
  .cs-results-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .cs-meta-strip {
    grid-template-columns: 1fr;
    padding: 1.25rem;
  }

  .cs-step-card {
    grid-template-columns: 1fr;
    gap: 1rem;
    padding: 1.25rem;
  }

  .cs-step-badge {
    width: 42px;
    height: 42px;
    font-size: 1rem;
  }

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

  .cs-next-card {
    padding: 1.5rem;
  }

  .cs-visual-showcase {
    margin-bottom: 2.5rem;
  }

  .cs-testimonial-card {
    padding: 1.5rem;
  }
}