frontend-inversiones/src/app/components/investment-proposals/payment-requirement/payment-requirement.component.scss

.area {
  width: 77%;
  padding: 15px;
  margin: 15px;
  border: 1px solid #333;
  background: rgba(0, 0, 0, 0.7);
}

#dropZone {
  border: 2px dashed #bbb;
  -webkit-border-radius: 5px;
  border-radius: 5px;
  padding: 50px;
  text-align: center;
  font: 21pt bold arial;
  color: #bbb;
}

.drop-file-over {
  background: #333;
}

.form-group input[type="file"] {
  opacity: 1;
  z-index: 1;
  position: relative;
}