message: Button: overlay levels
diff: color: #fff;
  }
  +.Button--lvl-overlay_primary {
  + background-color: var(--media_overlay_button_background);
  + color: var(--media_overlay_button_foreground);
  +}
  +
  +.Button--lvl-overlay_outline {
  + background-color: transparent;
  + border: 1px solid var(--media_overlay_button_background);
  + color: var(--media_overlay_button_background);
  +}
  +
  .Button--sz-m {
  padding: 0 16px;
  }
  