gitlabhq/app/assets/stylesheets/tree.scss

#tree-breadcrumbs { 
  div {
    margin:0;
    margin-bottom:20px;
    float:left;
    font-size:14px;
  }
}

.tree_progress { 
  display:none;
  margin:20px;
  &.loading { 
    display:block;
  }
}


/** FILE CONTENT VIEW **/
.view_file_content{
  .old_line, .new_line {
    background:#ECECEC;
    color:#777;
    width:15px;
    float:left;
    padding: 0px 10px;
    border-right: 1px solid #ccc;
  }
  .old_line{
    display:none;
  }
}

.view_file .view_file_header,
.diff_file .diff_file_header {
    background-image: -webkit-gradient(linear, 0 0, 0 26, color-stop(0.076, #fefefe), to(#F6F7F8));
    background-image: -webkit-linear-gradient(#fefefe 7.6%, #F6F7F8);
    background-image: -moz-linear-gradient(#fefefe 7.6%, #F6F7F8);
    background-image: -o-linear-gradient(#fefefe 7.6%, #F6F7F8);
    margin: 0;
    font-weight: normal;
    font-weight: bold;
    text-align: left;
    color: #666;
    border-bottom: 1px solid #DEE2E3;
    padding: 7px 10px;

    .mode_text,
    .file_icon { 
      margin-right:15px;
      padding-right:15px;
      border-right:1px solid $lite_border_color;
      float:left;
      color:#aaa;
    }

    .file_icon { 
      padding-left:15px;
    }
}

.view_file {
  border:1px solid #CCC;
  margin-bottom:1em;

  .view_file_content {
    background:#fff;
    color:#514721;
    font-size: 11px;
  }
  .view_file_content_image {
    background:#eee;
    text-align:center;
    img {
      padding:100px;
      max-width:300px;
    }
  }
}

td.code {
  width: 100%;
  .highlight {
    margin-left: 55px;
    overflow:auto;
    overflow-y:hidden;
    border-left: 1px solid #DEE2E3;
    background: white;
  }
}
.highlight pre {
  white-space: pre;
  word-wrap:normal;
}

table.highlighttable {
  border: none;
  background: #F7F7F7;
}
body.project-page table.highlighttable td { border: none }
table.highlighttable tr:hover { background:none;}

table.highlighttable pre{
  line-height:16px !important;
  font-size:12px !important;
}

table.highlighttable .linenodiv pre {
  text-align: right;
  padding-right: 4px;
  color:#888;
}

.tree-item { 
  &:hover { 
    background: #FFFFCF;
    cursor:pointer;
  }

  .tree-item-file-name { 
    font-weight:bold;

    img { 
      position: relative;
      top: 2px;
    }
  }
}