/* ===========================
   Case Study Page Styles
   =========================== */

.back-link {
  position: fixed;
  top: 32px;
  left: 40px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  z-index: 100;
  transition: color 0.3s ease;
}

.back-link:hover {
  color: var(--text);
}

.case-study {
  max-width: 720px;
  margin: 0 auto;
  padding: 120px 40px 80px;
}

/* Hero */
.cs-hero {
  margin-bottom: 64px;
  padding-bottom: 48px;
  border-bottom: 1px solid #1C2235;
}

.cs-tag {
  display: inline-block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  padding: 4px 12px;
  border: 1px solid #2A3248;
  border-radius: 100px;
  margin-bottom: 24px;
}

.cs-title {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 24px;
}

.cs-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 600px;
}

/* Context Bar */
.cs-context {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px 40px;
  margin-bottom: 72px;
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid #1C2235;
  border-radius: 12px;
}

.cs-context-label {
  display: block;
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 6px;
}

.cs-context-item p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Sections */
.cs-section {
  margin-bottom: 72px;
}

.cs-section-title {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 24px;
}

.cs-body {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 16px;
}

.cs-body--muted {
  color: var(--text-dim);
  margin-bottom: 40px;
}

/* Process Steps */
.cs-process-steps {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 16px;
}

.cs-step {
  display: flex;
  align-items: baseline;
  gap: 16px;
}

.cs-step-number {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.05em;
  flex-shrink: 0;
}

.cs-step p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Findings */
.cs-finding {
  margin-top: 48px;
  padding: 40px 0;
  border-top: 1px solid #1C2235;
}

.cs-finding-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.cs-finding-number {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.1em;
}

.cs-finding-heuristic {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-dim);
  padding: 3px 10px;
  border: 1px solid #2A3248;
  border-radius: 100px;
}

.cs-finding-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 24px;
}

.cs-finding-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 32px;
}

.cs-detail-label {
  display: block;
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 8px;
}

.cs-finding-detail p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.cs-finding-visual {
  margin-top: 16px;
}

.cs-finding-visual .visual-placeholder {
  height: 280px;
}

.cs-finding-visual img {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  border: 1px solid #1C2235;
  display: block;
  margin: 0 auto;
  max-height: 500px;
  object-fit: contain;
}

/* List */
.cs-list {
  list-style: none;
  margin: 16px 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.cs-list li {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
  padding-left: 20px;
  position: relative;
}

.cs-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

/* Outcome Grid */
.cs-outcome-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 32px;
}

.cs-outcome-item {
  text-align: center;
  padding: 24px 16px;
  background: var(--bg-card);
  border: 1px solid #1C2235;
  border-radius: 12px;
}

.cs-outcome-number {
  display: block;
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}

.cs-outcome-label {
  font-size: 0.75rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Footer Nav */
.cs-footer-nav {
  margin-top: 80px;
  padding-top: 32px;
  border-top: 1px solid #1C2235;
}

.cs-footer-link {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color 0.3s ease;
}

.cs-footer-link:hover {
  color: var(--text);
}

/* Figures & Image Groups */
.cs-image-group {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.cs-figure {
  margin: 0;
}

.cs-figure img {
  width: 100%;
  height: auto;
  border-radius: 12px;
  border: 1px solid #1C2235;
  display: block;
}

.cs-figure figcaption {
  margin-top: 10px;
  font-size: 0.75rem;
  color: var(--text-dim);
  text-align: center;
}

/* Outcome variant for text labels */
.cs-outcome-number--small {
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
}

/* Lightbox */
.lightbox-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(10, 14, 24, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  cursor: zoom-out;
}

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

.lightbox-overlay img {
  max-width: 90vw;
  max-height: 90vh;
  border-radius: 8px;
  object-fit: contain;
  transform: scale(0.95);
  transition: transform 0.3s ease;
}

.lightbox-overlay.active img {
  transform: scale(1);
}

/* Make case study images clickable */
.cs-finding-visual img,
.cs-figure img {
  cursor: zoom-in;
  transition: border-color 0.3s ease, transform 0.2s ease;
}

.cs-finding-visual img:hover,
.cs-figure img:hover {
  border-color: var(--accent);
  transform: scale(1.005);
}

/* Responsive */
@media (max-width: 700px) {
  .case-study {
    padding: 100px 24px 60px;
  }

  .cs-title {
    font-size: 1.75rem;
  }

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

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

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

  .back-link {
    top: 20px;
    left: 20px;
  }
}