.invalid-feedback {
    display: block !important;
}
input::placeholder {
    color: #b5b5b7 !important;
    opacity: 1; /* Firefox */
  }
  
  input::-ms-input-placeholder { /* Internet Explorer 10-11 */
   color: #b5b5b7 !important;
  }
  
  input ::-ms-input-placeholder { /* Microsoft Edge */
   color: #b5b5b7 !important;
  }