.accessibility-invert {
  filter: url(data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPgogIDxmaWx0ZXIKICAgICAgaWQ9ImludmVydEZpbHRlciIKICAgICAgY29sb3ItaW50ZXJwb2xhdGlvbi1maWx0ZXJzPSJzUkdCIj4KICAgIDxmZUNvbG9yTWF0cml4CiAgICAgICAgdmFsdWVzPSItMSAwIDAgMCAxIDAgLTEgMCAwIDEgMCAwIC0xIDAgMSAwIDAgMCAxIDAgIiAvPgogIDwvZmlsdGVyPgo8L3N2Zz4K#invertFilter);
}

#accessibility-captions-box {
  padding: 0.5rem;
  font-size: 1.6rem;
  position: fixed;
  bottom: 0;
  left: calc(15% - 0.5rem);
  pointer-events: none;
  background-color: black;
  width: 70%;
  margin: 0 auto;
  visibility: hidden;
  opacity: 0;
  text-align: center;
  transition: visibility 0.5s, opacity 0.5s;
  border-radius: 0.5rem 0.5rem 0 0;
}

#accessibility-captions-box.visible {
  visibility: visible;
  opacity: 0.9;
}