:root{
  --duration-instant:80ms; /* @kind other */
  --duration-fast:140ms; /* @kind other */
  --duration-base:220ms; /* @kind other */
  --duration-slow:360ms; /* @kind other */

  --ease-out:cubic-bezier(0.2,0,0,1); /* @kind other */
  --ease-in-out:cubic-bezier(0.4,0,0.2,1); /* @kind other */
  --ease-linear:linear; /* @kind other */

  --transition-hover:color var(--duration-fast) var(--ease-out),background-color var(--duration-fast) var(--ease-out),border-color var(--duration-fast) var(--ease-out),opacity var(--duration-fast) var(--ease-out);
}