box-shadow on <button> is cut off on Safari ONLY - css

Question

I'm trying to achieve a 'press' button effect with a <button> and a <span> but for some reason the shadow is getting cut off on Safari ONLY.
I'm using two tags here because that's a limitation of the website i'm editing, I can't change the markup.
It's simple as this, HTML:
<button><span>A simple fucking button</span></button>
CSS:
button {
-webkit-appearance: none;
border: none;
background: none;
padding: 0;
margin: 0;
}
button span {
text-transform: uppercase;
font-weight: bold;
border: 3px solid black;
padding: 10px 35px;
border-radius: 2em;
display: block;
background-color: #fff;
box-shadow: 0px 4px 0px -2px #bfbfbf,
0px 5px 0px 0px black;
}
button:active,
button:hover {
color: inherit;
}
button:hover {
span {
transform: translate(0px, 5px);
box-shadow: 0px 0px 0px 0px;
}
}
codepen.io example:
https://codepen.io/marlonmarcello/pen/dVBKpd

Answer 1

If you are open to dropping the span, then the button and styles can be adjusted to achieve the desired effect:
https://codepen.io/enquiren/pen/qMzLrd
button {
-webkit-appearance: none;
border: none;
background: none;
padding: 0;
margin: 0;
cursor: pointer;
&.pushable {
text-transform: uppercase;
font-weight: bold;
border: 3px solid black;
padding: 10px 35px;
border-radius: 2em;
display: block;
background-color: #fff;
box-shadow: 0px 4px 0px -2px #bfbfbf,
0px 5px 0px 0px black;
&:hover {
transform: translate(0px, 5px);
box-shadow: 0px 0px 0px 0px;
}
}
}
<button class="pushable">A simple button</button>