.modal.hidden { display: none; }
.modal {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}
.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.5);
}
.modal-content {
  position: relative;
  background: var(--background);
  padding: var(--size-2xl);
  z-index: 1;
  border-radius: var(--radius-m);
  max-height: 90vh;
  overflow-y: auto;
}