Here's the code I was using. Like I said, when I swap out the <a> for a <p> element, remove the href, and change it accordingly in the CSS the styles then apply.
In the <> block:
<a class=“g_button” href="https://fumcpdx.churchcenter.com/giving?open-in-church-center-modal=true">
Give Online Now
</a>
In the custom CSS:
/* Give Button Styling */
a.g_button {
background: #D34B2A;
color: #F5F1E9;
text-transform: Uppercase;
font-family: “Merriweather”, serif;
text-align: center;
letter-spacing: 1.5px;
font-weight: 600;
font-size: 1.2em;
padding:15px 50px 15px 50px;
border: none;
border-radius:5px;
display: inline-block;
}
a.g_button:hover {
background: #EB693B;
}