JSFiddle - React, Tailwind, and code Playground

HTML

<p class="submit">
    <input id="submit-button" type="submit" value="Post">
    <br><br>
    <input id="submit-cb" type="checkbox" checked>
    <input id="" type="hidden" value="" name="">
</p>

CSS

#submit-button::before,
#submit-cb::before {
    content: ' ';
    background: transparent;
    border: 3px solid crimson;
    display: inline-block;
    width: 100%;
    height: 100%;
    padding: 0;
    margin: -3px -3px;
}