internal-import {
  from { background-image: url("internal-import.bmp"); }
  to { transform: translateX(40px); }
}
@keyframes internal-import-unused {
  from { background-image: url("internal-import-unused.bmp"); }
  to { transform: translateX(40px); }
}
</style>
<link rel="stylesheet" href="link.css">
<style>@import "import.css";</style>

<style>
#internal-internal { animation: internal-internal 3s linear infinite; }
#link-internal { animation: link-internal 3s linear infinite; }
#import-internal { animati