Modal window is behing the backdrop

[SzabKel]

The bootsketch.css contains a wrong definition for ".modal-backdrop" class.

The css in bootsketch:

.modal-backdrop{
position:fixed;
top:0;
right:0;
bottom:0;
left:0;
z-index:1040;
background-color:#000}

But this couses the backdrop to be in front and the modal is displayed behind it.
If you change it back to the original (from bootstrap 3.3.2):

.modal-backdrop {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  background-color: #000;
}

It is working again. Cheers.