/* ---------- Case Studies ---------- */
.case-studies { background: var(--mist); padding: 5.5rem 0; }
.cs-inner { max-width: 1100px; margin: 0 auto; padding: 0 1.5rem; }

.cs-heading {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.8rem, 2.3vw + 1rem, 2.45rem);
  color: var(--navy-900);
  text-align: center;
  margin: 0 0 2.8rem;
}

/* Empty state */
.cs-empty {
  max-width: 560px;
  margin: 0 auto;
  text-align: center;
  background: var(--white);
  border: 1px dashed var(--navy-500);
  border-radius: 16px;
  padding: 3rem 2rem;
}
.cs-empty-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--navy-900);
  margin: 0 0 0.9rem;
}
.cs-empty-text {
  font-size: 0.96rem;
  line-height: 1.65;
  color: var(--navy-500);
  margin: 0 0 1.6rem;
}

/* Card grid (used once real case studies exist) */
.cs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.8rem;
}
.cs-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.6rem 1.7rem;
  display: flex;
  flex-direction: column;
}
.cs-card-head { margin: 0 0 1.2rem; }
.cs-card-head h3 { font-family: var(--font-display); font-size: 1.15rem; margin: 0; color: var(--navy-900); }
.cs-card-head span { font-size: 0.82rem; color: var(--green-600); font-weight: 600; }
.cs-block { margin-bottom: 1rem; }
.cs-block h4 {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--navy-500);
  margin: 0 0 0.3rem;
}
.cs-block p { margin: 0; font-size: 0.92rem; line-height: 1.55; color: var(--navy-700); }
.cs-link {
  margin-top: auto;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--navy-700);
  padding-top: 0.5rem;
}
.cs-link:hover { color: var(--green-600); }