/* ─────────────────────────────────────────────────────────────────
   CASE STUDY STYLES
───────────────────────────────────────────────────────────────── */

/* ── Hero ── */
.cs-hero {
    min-height: 70vh;
    display: flex;
    align-items: flex-end;
    padding-top: var(--nav-h);
    padding-bottom: var(--space-lg);
  }
  
  .cs-hero-inner { width: 100%; }
  
  .cs-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
    opacity: 0;
    transform: translateY(16px);
  }
  
  .cs-tag {
    padding: 0.3rem 0.75rem;
    border-radius: 999px;
    border: 1px solid var(--border);
    font-size: var(--fs-xs);
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-muted);
  }
  
  .cs-year {
    font-size: var(--fs-xs);
    color: var(--text-faint);
    letter-spacing: 0.1em;
  }
  
  .cs-title {
    display: flex;
    flex-direction: column;
    margin-bottom: 2.5rem;
    line-height: 0.9;
  }
  
  .cs-title-line { overflow: hidden; display: block; }
  
  .cs-subtitle {
    font-size: clamp(1rem, 1.8vw, 1.25rem);
    color: var(--text-muted);
    max-width: 600px;
    line-height: 1.7;
  }
  
  /* ── Cover image ── */
  .container-full { padding: 0 var(--gutter) var(--space-lg); }
  
  .cs-cover-inner {
    width: 100%;
    aspect-ratio: 16 / 8;
    border-radius: 20px;
    overflow: hidden;
    background: var(--surface);
  }
  
  .cs-cover-inner img {
    width: 100%; height: 100%;
    object-fit: cover;
  }
  
   .cs-cover-placeholder {
    width: 100%; height: 100%;
    display: flex;
    align-items: flex-end;
    justify-content: flex-start;
    padding: 2.5rem;
    font-family: var(--font-sans);
    font-size: clamp(3rem, 8vw, 7rem);
    font-weight: 900;
    letter-spacing: -0.05em;
    color: rgba(255,255,255,0.06);
    background: linear-gradient(135deg, var(--surface) 0%, var(--card-bg) 100%);
    position: relative;
    overflow: hidden;
  }

  .cs-cover-placeholder::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
      105deg,
      transparent 40%,
      rgba(200,255,0,0.03) 50%,
      transparent 60%
    );
    background-size: 200% 100%;
    animation: shimmer 5s ease-in-out infinite;
  }
  
  /* ── Overview ── */
  .cs-overview { padding: var(--space-lg) 0; }
  
  .cs-grid {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 5rem;
    align-items: start;
  }
  
  .cs-details {
    display: flex;
    flex-direction: column;
    gap: 1.75rem;
    position: sticky;
    top: calc(var(--nav-h) + 2rem);
  }
  
  .cs-detail-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
  }
  
  .cs-detail-label {
    font-size: var(--fs-xs);
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-faint);
  }
  
  .cs-detail-val {
    font-size: var(--fs-sm);
    font-weight: 600;
    color: var(--text);
  }
  
  .cs-section-title {
    font-family: var(--font-sans);
    font-size: var(--fs-lg);
    font-weight: 900;
    letter-spacing: -0.03em;
    margin-bottom: 1.25rem;
  }
  
  .cs-body {
    font-size: 1rem;
    color: var(--text-muted);
    line-height: 1.85;
    max-width: 620px;
  }
  
  .cs-body + .cs-body { margin-top: 1.25rem; }
  
  /* ── Image blocks ── */
  .cs-img-block {
    margin-bottom: var(--space-lg);
  }
  
   .cs-img-placeholder {
    width: 100%;
    aspect-ratio: 16 / 9;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--surface) 0%, var(--card-bg) 100%);
    display: flex;
    align-items: flex-end;
    justify-content: flex-start;
    padding: 1.5rem;
    font-family: var(--font-sans);
    font-size: clamp(2rem, 5vw, 4rem);
    font-weight: 900;
    letter-spacing: -0.05em;
    color: rgba(255,255,255,0.05);
    position: relative;
    overflow: hidden;
  }
  
  .cs-img-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: var(--space-lg);
  }
  
  /* ── Two col ── */
  .cs-two-col { padding: var(--space-lg) 0; }
  
  .cs-two-col-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
  }
  
  /* ── Results ── */
  .cs-results { padding: var(--space-lg) 0; border-top: 1px solid var(--border); }
  
  .cs-results-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 2.5rem;
  }
  
  .cs-result-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid var(--border);
    background: var(--card-bg);
    transition: border-color 0.3s;
  }
  
  .cs-result-item:hover { border-color: var(--accent); }
  
  .cs-result-num {
    font-family: var(--font-sans);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 900;
    letter-spacing: -0.04em;
    color: var(--text);
  }
  
  .cs-result-label {
    font-size: var(--fs-sm);
    color: var(--text-muted);
  }
  
  /* ── Next project ── */
  .cs-next {
    padding: var(--space-xl) 0 var(--space-lg);
    border-top: 1px solid var(--border);
  }
  
  .cs-next-label {
    font-size: var(--fs-xs);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--text-faint);
    margin-bottom: 1rem;
  }
  
  .cs-next-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
    cursor: none;
    transition: color 0.3s;
  }
  
  .cs-next-link:hover { color: var(--text-muted); }
  
  .cs-next-title {
    font-family: var(--font-sans);
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 900;
    letter-spacing: -0.04em;
    line-height: 1;
  }
  
  .cs-next-arrow {
    font-size: clamp(2rem, 4vw, 3.5rem);
    flex-shrink: 0;
    transition: transform 0.4s var(--ease-expo);
  }
  
  .cs-next-link:hover .cs-next-arrow {
    transform: translateX(12px);
  }
  
  /* ── Responsive ── */
  @media (max-width: 900px) {
    .cs-grid {
      grid-template-columns: 1fr;
      gap: 2.5rem;
    }
    .cs-details { position: static; flex-direction: row; flex-wrap: wrap; gap: 1.5rem; }
    .cs-two-col-inner { grid-template-columns: 1fr; gap: 2.5rem; }
    .cs-results-grid { grid-template-columns: 1fr 1fr; }
    .cs-img-grid { grid-template-columns: 1fr; }
  }
  
  @media (max-width: 480px) {
    .cs-results-grid { grid-template-columns: 1fr; }
  }