message: ssr and video fixes
diff: rounded-corners-lg()
  change-bg('bg-offset')
  display: block
  - height: 100%
  - width: auto
  + width: inherit
  margin-left: auto
  margin-right: auto
  position: absolute
  // show it.
  .-ssr &
  position: static
  + width: 100%
  </style>
  <script lang="ts" src="./item"></script>
  