/* Case Study Details Styles */
.cs-hero {
  padding: 8rem 0 4rem 0;
  position: relative;
  overflow: hidden;
}

.cs-header {
  max-width: 800px;
  margin-bottom: 3rem;
}

.cs-tagline {
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  color: var(--text-secondary);
  margin-top: 1rem;
  line-height: 1.4;
}

/* Metadata Grid */
.cs-meta-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  padding: 2.5rem;
  border-radius: 24px;
  background: var(--surface-color);
  border: 1px solid var(--surface-border);
  margin-bottom: 4rem;
}

@media (max-width: 768px) {
  .cs-meta-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    padding: 1.75rem;
  }
}

@media (max-width: 480px) {
  .cs-meta-grid { grid-template-columns: 1fr; }
}

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

.cs-meta-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
  font-family: var(--font-display);
  font-weight: 600;
}

.cs-meta-val {
  font-size: 1.05rem;
  color: var(--text-primary);
  font-weight: 500;
}

/* Two-column layout */
.cs-split-layout {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 4rem;
  margin-bottom: 6rem;
}

@media (max-width: 900px) {
  .cs-split-layout { grid-template-columns: 1fr; gap: 2.5rem; }
}

.cs-sidebar-title {
  font-size: 1.75rem;
  position: sticky;
  top: 100px;
}

.cs-body-content p {
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
  line-height: 1.8;
}

.cs-challenge-box {
  border-left: 4px solid var(--accent-secondary);
  padding-left: 2rem;
  margin: 2rem 0;
}

.cs-challenge-box p {
  font-style: italic;
  color: var(--text-primary);
}

/* Process Timeline */
.cs-process-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  margin-top: 2rem;
}

@media (max-width: 640px) {
  .cs-process-list { grid-template-columns: 1fr; }
}

.cs-process-step { padding: 2rem; }

.cs-process-step-num {
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--accent-primary);
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}

.cs-process-step-title {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

/* Outcomes grid */
.cs-outcome-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin: 3rem 0;
}

@media (max-width: 768px) {
  .cs-outcome-grid { grid-template-columns: 1fr; gap: 1.5rem; }
}

.cs-outcome-card { text-align: center; padding: 2rem; }

.cs-outcome-val {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cs-outcome-label {
  font-family: var(--font-display);
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Gallery Grid */
.cs-gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  margin-top: 3rem;
}

@media (max-width: 768px) {
  .cs-gallery-grid { grid-template-columns: 1fr; gap: 1.5rem; }
}

.cs-gallery-item {
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--surface-border);
  cursor: pointer;
  background: #141033;
  height: 300px;
}

.cs-gallery-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

.cs-gallery-item:hover .cs-gallery-img { transform: scale(1.03); }

/* Lightbox overlay */
.lightbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(7, 4, 23, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s ease;
}

.lightbox.active {
  opacity: 1;
  pointer-events: all;
}

.lightbox-content-wrapper {
  position: relative;
  max-width: 90%;
  max-height: 85%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox-img {
  max-width: 100%;
  max-height: 80vh;
  border-radius: 12px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.lightbox-btn {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  position: absolute;
  z-index: 2100;
  transition: all var(--transition-fast);
  font-size: 1.1rem;
  /* Minimum 44px tap target for accessibility */
  min-width: 44px;
  min-height: 44px;
}

.lightbox-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.25);
  transform: scale(1.05);
}

.lightbox-btn:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 3px;
}

.lightbox-close { top: -60px; right: 0; }
.lightbox-prev { left: -70px; }
.lightbox-next { right: -70px; }

/* Mobile lightbox — move buttons below image, proper tap targets */
@media (max-width: 768px) {
  .lightbox-prev {
    left: 10px;
    bottom: -65px;
    top: auto;
    width: 44px;
    height: 44px;
  }
  .lightbox-next {
    right: 10px;
    bottom: -65px;
    top: auto;
    width: 44px;
    height: 44px;
  }
  .lightbox-close {
    top: -55px;
    right: 0;
    width: 44px;
    height: 44px;
  }
}