how to make text input and button the same height when assigning the text input fixed font-size?
<p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
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<pre class="snippet-code-css lang-css prettyprint-override"><code>* {
    padding: 0;
    margin: 0;
    border: 1px solid red;
    box-sizing: border-box;
}

form {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
}

form input {
    width: 90%;
    font-size: 50px;
    vertical-align: middle;
}

form button {
    width: 9%;
    vertical-align: middle;
}</code></pre>
<pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;!DOCTYPE html&gt;
&lt;html&gt;
&lt;body&gt;
    &lt;form&gt;
        &lt;input id="m" type="text"&gt;
        &lt;button&gt;POST&lt;/button&gt;
    &lt;/form&gt;
&lt;/body&gt;
&lt;/html&gt;</code></pre>
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<p>I'd like to create a simple text and button page. The requirement is:</p>

<ol>
<li>The text and button are both on the bottom,</li>
<li>The text and button have the same height and are aligned,</li>
<li>The text has fixed font-size (e.g. 50px)</li>
</ol>

<p>How can I achieve that? The text is much bigger than the button now.</p>