:root{
  --dur-instant:60ms;
  --dur-fast:120ms;
  --dur-base:200ms;
  --dur-slow:360ms;
  --dur-sweep:1600ms;   /* trace sweep */
  --ease-standard:cubic-bezier(.2,.6,.2,1);
  --ease-out:cubic-bezier(.16,1,.3,1);
  --ease-in:cubic-bezier(.4,0,1,1);
  --ease-linear:linear;
  --dur-spin:5000ms;   /* loader revolution */
  --ease-spin:cubic-bezier(.17,.49,.96,.79);   /* loader: slow haul, fast snap */
  --transition-control:background-color var(--dur-fast) var(--ease-standard),border-color var(--dur-fast) var(--ease-standard),color var(--dur-fast) var(--ease-standard),box-shadow var(--dur-fast) var(--ease-standard);
}

@keyframes tch-spin{from{transform:rotate(0deg)}to{transform:rotate(360deg)}}
@media (prefers-reduced-motion:reduce){[data-tch-spin]{animation:none!important}}