ul.file-list li a.file {
  text-indent: -999em;
  width: 32px;
  height: 32px;
  display: block;
}

ul.file-list a.file {
  background: url(img/icons/_page.png);
}
ul.file-list a.file.text-plain {
  background: url(img/icons/txt.png);
}
ul.file-list a.file.application-pdf {
  background: url(img/icons/pdf.png);
}

.asset-page ul.file-list li a.file {
  text-indent: 35px;
  width: auto;
  background-repeat: no-repeat;
}