Set CSS for inline HTML.
.btn {
border-radius: {{ RADIUS }};
background: {{ COLOR }};
}
.btn a {
border-radius: {{ RADIUS }};
border: solid 1px {{ COLOR }};
padding: 1em 1.5em;
color: #fff;
}
<table border="0" cellspacing="0" cellpadding="0" align="center">
<tr>
<td class="btn">
<a href="{{ URL }}">
{{ LABEL }}
</a>
</td>
</tr>
</table>
Anchor's display: block
didn't work.
padding
didn't work without set border
.