:root{
  --ease-standard:cubic-bezier(.4,0,.2,1); /* @kind other */
  --ease-out:cubic-bezier(0,0,.2,1); /* @kind other */
  --duration-fast:150ms; /* @kind other */
  --duration-base:250ms; /* @kind other */
  --duration-slow:400ms; /* @kind other */
  --transition-base:all var(--duration-base) var(--ease-standard);
}