/* ============================================================
   Case Study Detail Page — light theme (site palette)
   bg #ffffff · headings #1a1a2e · text #555 · borders #dde0e8
   accent var(--primary_color) #9d11cf · tints #f8f4ff
   ============================================================ */

.cs-page {
  padding-bottom: 60px;
}

.cs-section {
  margin-bottom: 24px;
}

/* ---------- Hero ---------- */

.cs-hero {
  padding-top: 68px;
}

.cs-hero h1 {
  font-size: 56px;
  line-height: 1.15;
  font-weight: 400;
  color: #1a1a2e;
  margin-bottom: 26px;
}

.cs-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 30px;
}

.cs-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #ffffff;
  border: 1px solid #dde0e8;
  border-radius: 30px;
  padding: 8px 18px;
  font-size: 13px;
  color: #555;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.cs-meta-item i {
  color: var(--primary_color);
  font-size: 16px;
}

.cs-meta-item.cs-status i {
  font-size: 10px;
}

.cs-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 36px;
}

.cs-actions .theme-btn {
  padding: 12px 28px;
  font-size: 14px;
}

.cs-btn-outline {
  background: #ffffff;
  color: var(--primary_color);
}

.cs-btn-outline:hover {
  background: var(--primary_color);
  color: #ffffff;
}

.cs-hero-img {
  border: 1px solid #dde0e8;
  border-radius: 20px;
  overflow: hidden;
  margin-bottom: 40px;
  box-shadow: 0 10px 36px rgba(26, 26, 46, 0.1);
  background: #ffffff;
}

.cs-hero-img img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  object-position: top center;
  transition: transform 0.4s ease;
}

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

/* ---------- Cards ---------- */

.cs-card {
  background: #ffffff;
  border: 1px solid #dde0e8;
  border-radius: 20px;
  padding: 36px 40px;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.cs-card:hover {
  border-color: var(--primary_color);
  box-shadow: 0 6px 24px rgba(157, 17, 207, 0.1);
}

.cs-card-title {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
}

.cs-card-title i {
  width: 42px;
  height: 42px;
  flex: 0 0 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #f8f4ff;
  border: 1px solid #ede4fa;
  border-radius: 50%;
  color: var(--primary_color);
  font-size: 20px;
}

.cs-card-title h2 {
  font-size: 24px;
  font-weight: 600;
  color: #1a1a2e;
  margin: 0;
}

.cs-card > p,
.cs-card-body p {
  color: #555;
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 0;
}

/* ---------- Mini card grid (narrative fields) ---------- */

.cs-fact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.cs-mini-card {
  background: #ffffff;
  border: 1px solid #dde0e8;
  border-radius: 20px;
  padding: 30px 32px;
  transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}

.cs-mini-card:hover {
  border-color: var(--primary_color);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(157, 17, 207, 0.1);
}

.cs-mini-card i {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: #f8f4ff;
  border: 1px solid #ede4fa;
  border-radius: 50%;
  color: var(--primary_color);
  font-size: 20px;
  margin-bottom: 18px;
}

.cs-mini-card h3 {
  font-size: 17px;
  font-weight: 600;
  color: #1a1a2e;
  margin-bottom: 10px;
}

.cs-mini-card p {
  font-size: 15px;
  line-height: 1.75;
  color: #555;
  margin: 0;
}

/* ---------- Markdown prose ---------- */

.cs-prose h1,
.cs-prose h2 {
  font-size: 24px;
  font-weight: 600;
  color: #1a1a2e;
  margin: 28px 0 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid #eef0f4;
}

.cs-prose h1:first-child,
.cs-prose h2:first-child {
  margin-top: 0;
}

.cs-prose h3 {
  font-size: 18px;
  font-weight: 600;
  color: #1a1a2e;
  margin: 22px 0 10px;
}

.cs-prose p,
.cs-prose li {
  color: #555;
  font-size: 15.5px;
  line-height: 1.8;
}

.cs-prose p {
  margin-bottom: 14px;
}

.cs-prose ul,
.cs-prose ol {
  padding-left: 22px;
  margin-bottom: 16px;
}

.cs-prose ul {
  list-style: none;
}

.cs-prose ul li {
  position: relative;
  padding-left: 16px;
  margin-bottom: 6px;
}

.cs-prose ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 12px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary_color);
}

.cs-prose ol {
  list-style: decimal;
}

.cs-prose ol li {
  margin-bottom: 6px;
}

.cs-prose strong {
  color: #1a1a2e;
  font-weight: 600;
}

.cs-prose a {
  color: var(--primary_color);
}

.cs-prose hr {
  border: none;
  border-top: 1px solid #eef0f4;
  margin: 28px 0;
}

.cs-prose blockquote {
  border-left: 3px solid var(--primary_color);
  padding: 4px 0 4px 20px;
  margin: 20px 0;
  color: #444;
  font-style: italic;
}

.cs-prose code {
  background: #f8f4ff;
  border: 1px solid #ede4fa;
  border-radius: 6px;
  padding: 2px 8px;
  font-size: 13.5px;
  color: var(--primary_color);
}

/* ---------- Challenges & Solutions ---------- */

.cs-dual {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.challenge-box,
.solution-box {
  background: #ffffff;
  border: 1px solid #dde0e8;
  border-radius: 20px;
  padding: 32px 34px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.challenge-box {
  border-left: 4px solid #dc4c64;
}

.solution-box {
  border-left: 4px solid var(--primary_color);
}

.challenge-box:hover,
.solution-box:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(26, 26, 46, 0.08);
}

.challenge-box h3,
.solution-box h3 {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #1a1a2e;
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 20px;
}

.challenge-box h3 i {
  color: #dc4c64;
}

.solution-box h3 i {
  color: var(--primary_color);
}

.challenge-box ul li,
.solution-box ul li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  color: #555;
  font-size: 15.5px;
  line-height: 1.7;
  margin-bottom: 14px;
}

.challenge-box ul li i {
  color: #dc4c64;
  font-size: 18px;
  margin-top: 3px;
}

.solution-box ul li i {
  color: var(--primary_color);
  font-size: 18px;
  margin-top: 3px;
}

/* ---------- Tech stack chips ---------- */

.cs-chip-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.cs-chip {
  background: #f8f4ff;
  border: 1px solid #ede4fa;
  border-radius: 30px;
  padding: 10px 22px;
  font-size: 14px;
  color: #444;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: border-color 0.3s ease, color 0.3s ease;
}

.cs-chip i {
  color: var(--primary_color);
  font-size: 15px;
}

.cs-chip:hover {
  border-color: var(--primary_color);
  color: #1a1a2e;
}

/* ---------- Integration list ---------- */

.cs-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 4px 28px;
}

.cs-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  color: #555;
  font-size: 15.5px;
  line-height: 1.7;
  padding: 8px 0;
}

.cs-list li i {
  color: var(--primary_color);
  font-size: 18px;
  margin-top: 3px;
}

/* ---------- Screenshots ---------- */

.screenshots-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.screenshot-item {
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid #dde0e8;
  background: #ffffff;
  transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}

.screenshot-item:hover {
  border-color: var(--primary_color);
  transform: translateY(-4px);
  box-shadow: 0 10px 28px rgba(26, 26, 46, 0.12);
}

.screenshot-item a {
  display: block;
}

.screenshot-item img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}

.screenshot-item:hover img {
  transform: scale(1.04);
}

/* ---------- Metrics ---------- */

.cs-metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
}

.metric-card {
  background: #ffffff;
  border: 1px solid #dde0e8;
  border-radius: 20px;
  padding: 30px 24px;
  text-align: center;
  transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}

.metric-card:hover {
  border-color: var(--primary_color);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(157, 17, 207, 0.1);
}

.metric-value {
  font-size: 42px;
  font-weight: 600;
  color: var(--primary_color);
  line-height: 1;
  margin-bottom: 12px;
}

.metric-label {
  font-size: 14px;
  color: #666;
  line-height: 1.5;
  margin: 0;
}

.metric-card.metric-plain .metric-label {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60px;
  font-size: 15px;
}

/* ---------- Testimonial ---------- */

.testimonial-card {
  background: #ffffff;
  border: 1px solid #dde0e8;
  border-radius: 20px;
  padding: 40px 44px;
}

.testimonial-card > i {
  color: var(--primary_color);
  font-size: 34px;
  display: block;
  margin-bottom: 18px;
}

.testimonial-text {
  font-size: 19px;
  line-height: 1.8;
  color: #444;
  font-style: italic;
  margin-bottom: 24px;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 14px;
}

.testimonial-author .author-initial {
  width: 46px;
  height: 46px;
  flex: 0 0 46px;
  border-radius: 50%;
  background: #f8f4ff;
  border: 1px solid var(--primary_color);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--primary_color);
  font-weight: 600;
  font-size: 18px;
}

.testimonial-author h5 {
  color: #1a1a2e;
  font-size: 16px;
  font-weight: 600;
  margin: 0;
}

.testimonial-author small {
  color: #999;
  font-size: 13px;
}

/* ---------- Timeline ---------- */

.timeline {
  position: relative;
  padding-left: 8px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 15px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: #dde0e8;
}

.timeline-item {
  position: relative;
  padding-left: 52px;
  margin-bottom: 20px;
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-marker {
  position: absolute;
  left: 8px;
  top: 22px;
  width: 15px;
  height: 15px;
  background: #ffffff;
  border: 2px solid var(--primary_color);
  border-radius: 50%;
}

.timeline-content {
  background: #fafbfd;
  border: 1px solid #dde0e8;
  border-radius: 14px;
  padding: 18px 24px;
  transition: border-color 0.3s ease, background 0.3s ease;
}

.timeline-content:hover {
  border-color: var(--primary_color);
  background: #ffffff;
}

.timeline-content h4 {
  color: #1a1a2e;
  font-size: 16.5px;
  font-weight: 600;
  margin: 0 0 4px;
}

.timeline-content p {
  color: #999;
  font-size: 13.5px;
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ---------- Demo card ---------- */

.demo-card {
  background: #ffffff;
  border: 1px solid #dde0e8;
  border-radius: 20px;
  padding: 40px;
  text-align: center;
}

.demo-card > i {
  font-size: 40px;
  color: var(--primary_color);
  display: block;
  margin-bottom: 16px;
}

.demo-header h3 {
  color: #1a1a2e;
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 8px;
}

.demo-header p {
  color: #666;
  font-size: 15px;
  margin-bottom: 26px;
}

.demo-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.demo-credentials {
  background: #fafbfd;
  border: 1px solid #dde0e8;
  border-radius: 14px;
  padding: 22px;
  margin-top: 28px;
  text-align: left;
}

.demo-credentials h5 {
  color: #1a1a2e;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.demo-credentials h5 i {
  color: var(--primary_color);
}

.credentials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
}

.credential-item {
  background: #ffffff;
  padding: 12px 16px;
  border-radius: 10px;
  border: 1px solid #dde0e8;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}

.credential-label {
  color: #888;
  font-size: 13px;
}

.credential-value {
  color: #1a1a2e;
  font-size: 13.5px;
  font-weight: 600;
  font-family: 'Courier New', monospace;
}

/* ---------- Outcomes highlight ---------- */

.cs-outcome {
  border-left: 4px solid var(--primary_color);
}

/* ---------- CTA ---------- */

.case-study-cta {
  background: #f8f4ff;
  border: 1px solid var(--primary_color);
  border-radius: 20px;
  padding: 48px 40px;
  text-align: center;
}

.case-study-cta h2 {
  color: #1a1a2e;
  font-size: 30px;
  font-weight: 400;
  margin-bottom: 10px;
}

.case-study-cta h2 span {
  color: var(--primary_color);
}

.case-study-cta p {
  color: #666;
  font-size: 15.5px;
  margin-bottom: 28px;
}

.case-study-cta .cta-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---------- Responsive ---------- */

@media (max-width: 1099px) {
  .cs-hero {
    padding-top: 40px;
  }

  .cs-hero h1 {
    font-size: 40px;
  }
}

@media (max-width: 767px) {
  .cs-hero h1 {
    font-size: 32px;
  }

  .cs-card,
  .demo-card,
  .testimonial-card {
    padding: 26px 22px;
  }

  .cs-fact-grid,
  .cs-dual,
  .cs-list {
    grid-template-columns: 1fr;
  }

  .metric-value {
    font-size: 34px;
  }

  .screenshots-grid {
    grid-template-columns: 1fr;
  }

  .case-study-cta {
    padding: 34px 22px;
  }

  .case-study-cta h2 {
    font-size: 24px;
  }
}