.card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  min-height: 0;
  transition: border-color .15s ease;
}
.card:hover { border-color: var(--border-strong); }
.card > header {
  padding: 8px 12px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}
.card-body { flex: 1 1 auto; min-height: 0; overflow: hidden; position: relative; }