@layer compositions {
  .frame {
    aspect-ratio: var(--frame-ratio, 16 / 9);
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
  }

  .frame > img,
  .frame > video {
    inline-size: 100%;
    block-size: 100%;
    object-fit: cover;
  }
}