 In this case, inject the `light` CSS before the others, with
  // no media filter so that it will be downloaded with highest priority.
  if (window.matchMedia("(prefers-color-scheme: dark)").media === "not all") {
    document.documentElement.style.display = "none";
    document.head.insertAdjacentHTML(
      "beforeend",
      "<link id=\"css\" rel=\"stylesheet\" href=\"https://bootswatch.com/3/flatly/bootstrap.css\" onload=\"document.documentElement.style.display = ''\">"
    );
  }
</script>

<title>Plo