.loader {
  width: fit-content;
  font-weight: bold;
  font-family: sans-serif;
  font-size: 20px;
  padding-bottom: 8px;
  background: linear-gradient(currentColor 0 0) 0 100%/0% 3px no-repeat;
  animation: l2 2s linear infinite;
}
.loader:before {
  content:"Loading applet..."
}
@keyframes l2 {to{background-size: 100% 3px}}