.sm-dropzone {
  border: 2px dashed #cfd4dc;
  border-radius: 12px;
  padding: 20px;
  text-align: center;
  cursor: pointer;
  background: #fff;
  transition: .15s;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.sm-dropzone.drag-over {
  border-color: #0d6efd;
  background: rgba(13,110,253,.05);
}

.sm-dropzone .dz-title {
  font-weight: 600;
}

.sm-dropzone .dz-placeholder,
.sm-dropzone .dz-preview { width: 100%; }

.sm-dropzone img.dz-img {
  max-height: 120px;
  max-width: 100%;
  object-fit: contain;
  background: #f8f9fa;
  border-radius: 8px;
  padding: 6px;
}

.hint {
  font-size: .8rem;
  color: #6c757d;
  margin-top: 4px;
}