I need some help with CSS, Bootstrap, and Rock it seems. Learning the nuance of this as I go...

I'm attempting to append the h4 tag with the CSS Property style="text-indent: 50px;". I'm specifically using the section below that I believe should work, but does not

<h4 style="text-indent: 50px;">
{{ Salutation }} <br />
{{ StreetAddress1 }} <br />
{% if StreetAddress2 != '' %}
 {{ StreetAddress2 }} &lt;br /&gt;
{% endif %}
{{ City }}, {{ State }} {{ PostalCode }}
</h4>
If I write the following HTML in Lava tester, it works:
<h4 style="text-indent: 50px;">
Example indented text via CSS Property appended to h4
</h4>
References I'm using that make me think my format should work:

Any insight or help appreciated!