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                <button class="giganto">
  <span>This button fails current proposed Focus Appearance SC<br>because the author dared to try and make a clickable area much larger than the apparent visual size of the button</span>

<span class="giganto">
  <button>This button passes the current proposed Focus Appearance SC<br>but has a small active area - so why would it be "safer" for an author to do this? the perceived/visual result is the same for a user</button>


                .giganto { width: 85vw; height: 30em; display: flex; justify-content: center; align-items: center; background: transparent; border: none; }
.giganto > * { background: #eee; padding: 1em; border: 1px solid #555; }

.giganto:focus { outline: none; }
.giganto:focus > *,
.giganto > *:focus { outline: 1px solid red; }