/* Fast press feedback, without bounce or persistent compositing layers. */
:where(button:not(:disabled),a.btn,[role="button"][tabindex]){
  scale:1;
  transform-origin:center;
  transition:scale 140ms ease,filter 120ms ease;
  -webkit-tap-highlight-color:transparent;
}
:where(button:not(:disabled),a.btn,[role="button"][tabindex]):active{
  scale:.98;
  filter:brightness(.96);
  transition:scale 120ms ease,filter 120ms ease;
}
@media(prefers-reduced-motion:reduce){
  :where(button:not(:disabled),a.btn,[role="button"][tabindex]){
    scale:1!important;
    transition:none!important;
  }
}