Why doesn't transition work for span of main items?

Question

css

The people why moveFromLeft does not work on the span of the main points, here:
codepen.io/anon/pen/wgvOXQ
The original is taken, here:
codepen.io/rizky_k_r/full/sqcAn

Answer 1

Give them display: block

Answer 2

set span to inline-block span is an inline element by default.

.m__menu li a span {
  display:inline-block;
}