/* case-studies.css — Case study cards with KPI grid */

.case-studies {
  background: var(--bg-primary);
}

.case-studies h2 {
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
  max-width: 400px;
}

.case-studies__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(1.5rem, 3vw, 2rem);
}

/* ── Card ── */
.case-card {
  background: white;
  border: 1px solid var(--whisper-border);
  border-radius: var(--radius-card);
  padding: clamp(1.5rem, 3vw, 2.5rem);
  transition:
    transform var(--transition-fast),
    border-color var(--transition-fast);
  cursor: default;
}

@media (hover: hover) and (pointer: fine) {
  .case-card:hover {
    transform: translateY(-2px);
    border-color: var(--blue);
  }
}

/* Experiment ID bar */
.case-card__exp {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--whisper-border);
}

.case-card__exp-id {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.06em;
}

.case-card__status {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: #16a34a;
}

.case-card__status::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #16a34a;
  flex-shrink: 0;
}

/* Hypothesis line */
.case-card__hypothesis {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.625rem;
  padding: 0.5rem 0.75rem;
  background: var(--blue-tint);
  border-radius: 0.375rem;
  border: 1px solid rgba(26, 111, 212, 0.12);
  line-height: 1.5;
}

/* Header */
.case-card__header {
  margin-bottom: 2rem;
}

.case-card__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--blue);
  background: var(--blue-tint);
  padding: 0.25rem 0.75rem;
  border-radius: 2rem;
  margin-bottom: 0.75rem;
}

.case-card__header h3 {
  margin-bottom: 0.5rem;
}

.case-card__header p {
  color: var(--text-mid);
  font-size: var(--text-caption);
  max-width: 45ch;
}

/* KPI grid */
.case-card__kpis {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--whisper-border);
  margin-bottom: 1.5rem;
}

.case-card__kpi-value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.25rem, 2vw, 1.75rem);
  font-weight: 600;
  color: var(--blue);
  line-height: 1.2;
}

.case-card__kpi-label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* Meta row */
.case-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--whisper-border);
}

.case-card__meta-item {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .case-studies__grid {
    grid-template-columns: 1fr;
  }
}