message: Update the trigger animation with combination of scale transformation and opacity
diff: .trigger_menu {
  transform: scale(0);
  transform-origin: top left;
  - transition: all 450ms ease-in;
  + opacity: 0;
  + transition: all 250ms ease-in;
  position: absolute;
  top: 1px;
  left: 40px;
  .trigger_menu--open {
  transform: scale(1);
  + opacity: 1;
  z-index: 2;
  }
  }
  