/* ==========================================
   4. MODAL Y CARRITO
   ========================================== */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.modal[aria-hidden="false"] { opacity: 1; visibility: visible; }

.modal-content {
  background: white;
  padding: 2rem;
  border-radius: 20px;
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
}