/* OBS 透明背景対応 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background: transparent;
  overflow: hidden;
  width: 1920px;
  height: 1080px;
}

#overlay-canvas {
  display: block;
  width: 1920px;
  height: 1080px;
}