uppy/packages/@uppy/dashboard/src/components/FileItem/FilePreviewAndLink/index.scss

.uppy-DashboardItem-previewInnerWrap {
  width: 100%;
  height: 100%;
  overflow: hidden;
  // For :after positioning
  position: relative;

  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;

  box-shadow: 0 0 2px 0 rgba($black, 0.4);
  border-radius: 3px;

  .uppy-size--md & {
    box-shadow: 0 1px 2px rgba($black, 0.15);
  }
}
  .uppy-DashboardItem-previewInnerWrap:after {
    content: '';
    position: absolute;
    left: 0; right: 0;
    top: 0; bottom: 0;
    background-color: rgba($black, 0.65);
    display: none;
    z-index: $zIndex-2;
  }

  .uppy-DashboardItem-previewLink {
    position: absolute;
    left: 0; right: 0;
    top: 0; bottom: 0;

    z-index: $zIndex-3;
    &:focus{
      box-shadow: inset 0 0 0 3px lighten($blue, 20%);
    }
  }

  .uppy-DashboardItem-preview img.uppy-DashboardItem-previewImg {
    width: 100%;
    height: 100%;
    object-fit: cover;
    // Fixes file previews being partially invisible in safari (for some pics only).
    // (https://stackoverflow.com/a/27971913/3192470)
    transform: translateZ(0);
    // We need a repeated border-radius because of the transform.
    border-radius: 3px;
  }
// ...uppy-DashboardItem-previewInnerWrap|