.za-file-picker {
  --opacity-disabled: var(--za-file-picker-opacity-disabled, var(--za-opacity-disabled));
  position: relative;
}
.za-file-picker__input {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
}

.za-file-picker--disabled {
  opacity: var(--opacity-disabled);
}