body.wp-admin {
  transition: background-color 0.2s ease, color 0.2s ease;
}

body.wp-admin #adminmenu a,
body.wp-admin #wpadminbar a {
  transition: color 0.2s ease, background-color 0.2s ease;
}

body.wp-admin .button.button-primary:hover,
body.wp-admin .button.button-primary:focus {
  filter: brightness(0.92);
}
