.certs-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 40px; }
.cert-card-click { cursor: pointer; }

/* ── Cert Lightbox Modal ── */
.modal {
  display: none; position: fixed; z-index: 2000; inset: 0;
  background: rgba(0,0,0,0.92);
  align-items: center; justify-content: center;
  padding: 40px;
}
.modal.open { display: flex; }
.modal-content {
  max-width: 90vw; max-height: 90vh; object-fit: contain;
  border-radius: 8px; box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.modal-close {
  position: absolute; top: 24px; right: 32px;
  font-size: 2.5rem; color: #fff; cursor: pointer;
  transition: color 0.25s; line-height: 1;
}
.modal-close:hover { color: var(--accent); }