takahe/templates/emails/_button.html

{% autoescape off %}
    <table role="presentation" border="0" cellpadding="0" cellspacing="0" class="btn btn-primary" style="border-collapse: separate; mso-table-lspace: 0pt; mso-table-rspace: 0pt; box-sizing: border-box; width: 100%;" width="100%">
        <tbody>
            <tr>
                <td align="left" style="font-family: sans-serif; font-size: 14px; vertical-align: top; padding-bottom: 15px;" valign="top">
                    <table role="presentation" border="0" cellpadding="0" cellspacing="0" style="border-collapse: separate; mso-table-lspace: 0pt; mso-table-rspace: 0pt; width: auto;">
                        <tbody>
                            <tr>
                                <td style="font-family: sans-serif; font-size: 14px; vertical-align: top; border-radius: 5px; text-align: center; background-color: #3498db;" valign="top" align="center" bgcolor="#3498db"> <a href="{{ button_link }}" target="_blank" style="border: solid 1px #3498db; border-radius: 5px; box-sizing: border-box; cursor: pointer; display: inline-block; font-size: 14px; font-weight: bold; margin: 0; padding: 12px 25px; text-decoration: none; text-transform: capitalize; background-color: #3498db; border-color: #3498db; color: #ffffff;">{{ button_text }}</a> </td>
                            </tr>
                        </tbody>
                    </table>
                </td>
            </tr>
        </tbody>
    </table>
{% endautoescape %}