/* Case study — only loaded on project pages */

.cs-wrap {
  max-width: 860px;
  margin: 0 auto;
  padding: 4rem 3rem 6rem;
}

.cs-back {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-2);
  text-decoration: none;
  margin-bottom: 2.5rem;
  transition: color 0.2s ease;
}
.cs-back:hover { color: var(--primary); }

.cs-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
}

.cs-tag {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--primary);
  background: var(--bg-2);
  padding: 0.3rem 0.75rem;
  border-radius: 100px;
}

.cs-year {
  font-size: 0.75rem;
  color: var(--text-2);
  font-weight: 500;
  margin-left: 0.25rem;
}

.cs-title {
  font-size: clamp(2.5rem, 5vw, 3.75rem);
  font-weight: 800;
  color: var(--text);
  line-height: 1.1;
  margin-bottom: 1.25rem;
}

.cs-lead {
  font-size: 1.1rem;
  color: var(--text-2);
  line-height: 1.75;
  max-width: 58ch;
}

.cs-visual {
  width: 100%;
  height: 380px;
  border-radius: 1rem;
  margin: 3rem 0;
}

.cs-section { padding: 3.5rem 0; }
.cs-section--border { border-top: 1px solid var(--bg-2); }

.cs-heading {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text);
  margin: 0.75rem 0 1rem;
  line-height: 1.2;
}

.cs-body {
  font-size: 0.975rem;
  color: var(--text-2);
  line-height: 1.8;
  max-width: 60ch;
}

.cs-body code {
  background: var(--bg-2);
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  font-size: 0.85em;
  color: var(--text);
}

.cs-overview {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-bottom: 2rem;
  border: 1px solid var(--bg-2);
  border-radius: 0.75rem;
  overflow: hidden;
}

.cs-ov-item {
  padding: 1.25rem 1.5rem;
  border-right: 1px solid var(--bg-2);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.cs-ov-item:last-child { border-right: none; }

.cs-ov-label {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-2);
  opacity: 0.6;
}

.cs-ov-value {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
}

.cs-palette {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  margin-top: 2rem;
}

.cs-palette-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-2);
  margin-bottom: 0.75rem;
}

.cs-swatches { display: flex; gap: 1rem; flex-wrap: wrap; }

.cs-swatch {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  flex: 1;
  min-width: 80px;
}

.cs-swatch-block { width: 100%; aspect-ratio: 1; border-radius: 0.5rem; }
.cs-swatch-name { font-size: 0.72rem; font-weight: 600; color: var(--text); }
.cs-swatch-hex  { font-size: 0.68rem; color: var(--text-2); font-family: monospace; }

.cs-contrasts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 2rem;
}

.cs-contrast {
  border-radius: 0.75rem;
  overflow: hidden;
  border: 1px solid var(--bg-2);
}

.cs-contrast-preview { padding: 1.5rem; font-size: 1rem; font-weight: 600; }

.cs-contrast-info {
  padding: 0.75rem 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-2);
  gap: 0.5rem;
  flex-wrap: wrap;
}

.cs-contrast-label { font-size: 0.7rem; color: var(--text-2); font-family: monospace; }

.cs-badge {
  font-size: 0.68rem;
  font-weight: 700;
  padding: 0.25rem 0.65rem;
  border-radius: 100px;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.cs-badge--pass { background: #1a3a1a; color: #6fcf6f; }
[data-theme="light"] .cs-badge--pass { background: #e6f4e6; color: #276a27; }
.cs-badge--warn { background: #3a2a0a; color: #e0a030; }
[data-theme="light"] .cs-badge--warn { background: #fdf3e0; color: #8a5a00; }

.cs-dm-demo {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-top: 2rem;
}

.cs-dm-label {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-2);
  margin-bottom: 0.6rem;
}

.cs-dm-preview { border-radius: 0.75rem; overflow: hidden; }
.cs-dm-nav { display: flex; justify-content: space-between; align-items: center; padding: 0.75rem 1rem; }
.cs-dm-content { padding: 1rem; }

.cs-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}
.cs-cta .cs-heading { margin-bottom: 0.5rem; }

@media (max-width: 900px) {
  .cs-wrap { padding: 3rem 1.5rem 4rem; }
  .cs-overview { grid-template-columns: 1fr 1fr; }
  .cs-ov-item:nth-child(2) { border-right: none; }
  .cs-ov-item:nth-child(n+3) { border-top: 1px solid var(--bg-2); }
  .cs-contrasts { grid-template-columns: 1fr; }
  .cs-dm-demo { grid-template-columns: 1fr; }
  .cs-cta { flex-direction: column; align-items: flex-start; gap: 1.5rem; }
}