:root{
  --duration-fast:120ms; --duration-base:200ms; --duration-slow:320ms;
  --ease-standard:cubic-bezier(.2,.6,.2,1);
  --ease-out:cubic-bezier(0,0,.2,1);
  --transition-control:background-color var(--duration-fast) var(--ease-standard),
    color var(--duration-fast) var(--ease-standard),
    border-color var(--duration-fast) var(--ease-standard);
}
@media (prefers-reduced-motion: reduce){
  :root{ --duration-fast:0ms; --duration-base:0ms; --duration-slow:0ms; }
}