/* ── Case Study Layout ── */

.cs-hero {
  padding: 56px 0 64px;
}

.cs-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.cs-hero__category {
  font-family: var(--font-label);
  font-weight: 700;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--accent-teal);
  text-transform: uppercase;
  margin-bottom: 16px;
}

.cs-hero__h1 {
  font-size: 56px;
  font-weight: 700;
  line-height: 1.08;
  color: var(--text-primary);
  max-width: 900px;
  margin-bottom: 20px;
}

.cs-hero__subtitle {
  font-size: 28px;
  font-weight: 700;
  color: var(--accent-cyan);
  line-height: 1.25;
  margin-bottom: 24px;
}

.cs-hero__summary {
  font-size: 16px;
  color: var(--text-muted);
  max-width: 720px;
  line-height: 1.75;
}

/* Quick summary cards */
.cs-summary-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 48px;
}

.cs-summary-card {
  background: var(--bg-card);
  border-radius: var(--radius-card);
  padding: 24px 28px;
}

.cs-summary-card__label {
  font-family: var(--font-label);
  font-weight: 700;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--accent-teal);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.cs-summary-card__text {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* Stats row */
.cs-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin: 48px 0;
}

/* Section */
.cs-section {
  padding: 56px 0;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.cs-section__h2 {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
  margin-bottom: 24px;
}

.cs-section__intro {
  font-size: 15px;
  color: var(--text-muted);
  max-width: 720px;
  line-height: 1.75;
  margin-bottom: 20px;
}

.cs-section__body {
  font-size: 15px;
  color: var(--text-muted);
  max-width: 720px;
  line-height: 1.75;
  margin-bottom: 16px;
}

/* Detail cards (what was built) */
.cs-detail-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 32px;
}

.cs-detail-card {
  background: var(--bg-card);
  border-radius: var(--radius-card);
  padding: 28px 32px;
}

.cs-detail-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.cs-detail-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* Tech stack */
.cs-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}

/* CTA */
.cs-cta {
  background: var(--bg-card);
  border-radius: var(--radius-card);
  padding: 48px;
  text-align: left;
  margin: 64px 0 32px;
}

.cs-cta h2 {
  font-size: 24px;
  max-width: 560px;
  margin: 0 0 28px;
  line-height: 1.35;
}

/* Back link */
.cs-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  font-size: 12px;
  color: var(--text-muted);
  padding: 16px 0 48px;
  transition: color var(--transition);
}

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

/* Responsive */
@media (max-width: 1024px) {
  .cs-hero__h1 {
    font-size: 42px;
  }

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

  .cs-stats {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 768px) {
  .cs-hero__h1 {
    font-size: 32px;
  }

  .cs-hero__subtitle {
    font-size: 20px;
  }

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

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

  .cs-cta {
    padding: 32px 24px;
  }
}

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