.effect {
  display: table;
  width: 98%;
  position: absolute;
  top: 50px;
}

.effect > div {
  display: table-cell;
  vertical-align: middle;
}

.bgm {
  text-align: center;
}

img.fit {
  display: block;
  max-width: 60%;
  max-height: 60%;
  margin: 0 auto;
}

#browser_error {
  text-align: center;
  height: 80%;
  vertical-align: middle;
}