lbry-desktop/src/ui/scss/component/_file-render.scss

.file-render {
  width: 100%;
  height: 100%;
  z-index: 1;
  overflow: hidden;
}

.file-render__viewer {
  width: 100%;
  height: 100%;

  iframe,
  webview,
  img {
    width: 100%;
    height: 100%;
    object-fit: contain;
  }
}

.file-render__viewer--document {
  @extend .file-render__viewer;
  overflow: auto;
  background-color: $lbry-white;

  [data-mode='dark'] & {
    background-color: transparent;
  }

  .markdown-preview {
    height: 100%;
    overflow: auto;
    padding: var(--spacing-large);
  }
}

.file-render__viewer--pdf {
  @extend .file-render__viewer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5em;
}

.file-render__content {
  width: 100%;
  height: 100%;
  overflow: auto;
}

//
// Custom viewers live below here
// These either have custom class names that can't be changed or have styles that need to be ovverridden
//

// Code-viewer
.CodeMirror {
  @extend .file-render__content;

  .cm-invalidchar {
    display: none;
  }

  .CodeMirror .CodeMirror-lines {
    // is there really a .CodeMirror inside a .CodeMirror?
    padding: var(--spacing-small) 0;
  }

  .CodeMirror-code {
    @include font-mono;
    letter-spacing: 0.1rem;
  }

  .CodeMirror-gutters {
    background-color: $lbry-gray-1;
    border-right: 1px solid $lbry-gray-2;
    padding-right: var(--spacing-medium);
  }

  .CodeMirror-line {
    padding-left: var(--spacing-medium);
  }

  .CodeMirror-linenumber {
    color: $lbry-gray-5;
  }
}

.video-js {
  height: 100%;
  width: 100%;

  // Removing the play button because we have autoplay turned on
  // These are classes added by video.js
  .vjs-big-play-button {
    display: none;
  }
}