.drop-zone {
  position: absolute;
  inset: 0;
  background: rgba(0, 113, 227, 0.08);
  border: 3px dashed var(--accent);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 600;
  color: var(--accent);
  z-index: 50;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s;
}

.drop-zone.show {
  opacity: 1;
  pointer-events: auto;
}