:root {
  /* Sine */
  --ease-in-sine: cubic-bezier(0.12, 0, 0.39, 0);
  --ease-out-sine: cubic-bezier(0.61, 1, 0.88, 1);
  --ease-in-out-sine: cubic-bezier(0.37, 0, 0.63, 1);

  /* Cubic */
  --ease-in-cubic: cubic-bezier(0.32, 0, 0.67, 0);
  --ease-out-cubic: cubic-bezier(0.33, 1, 0.68, 1);
  --ease-in-out-cubic: cubic-bezier(0.65, 0, 0.35, 1);

  /* Quint */
  --ease-in-quint: cubic-bezier(0.64, 0, 0.78, 0);
  --ease-out-quint: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out-quint: cubic-bezier(0.83, 0, 0.17, 1);

  /* Circ */
  --ease-in-circ: cubic-bezier(0.55, 0, 1, 0.45);
  --ease-out-circ: cubic-bezier(0, 0.55, 0.45, 1);
  --ease-in-out-circ: cubic-bezier(0.85, 0, 0.15, 1);

  /* Quad */
  --ease-in-quad: cubic-bezier(0.11, 0, 0.5, 0);
  --ease-out-quad: cubic-bezier(0.5, 1, 0.89, 1);
  --ease-in-out-quad: cubic-bezier(0.45, 0, 0.55, 1);

  /* Quart */
  --ease-in-quart: cubic-bezier(0.5, 0, 0.75, 0);
  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
  --ease-in-out-quart: cubic-bezier(0.76, 0, 0.24, 1);

  /* Expo */
  --ease-in-expo: cubic-bezier(0.7, 0, 0.84, 0);
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out-expo: cubic-bezier(0.87, 0, 0.13, 1);

  /* Back */
  --ease-in-back: cubic-bezier(0.36, 0, 0.66, -0.56);
  --ease-out-back: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-in-out-back: cubic-bezier(0.68, -0.6, 0.32, 1.6);
}