app/views/layouts/mailer.html.erb
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<style>
body { margin: 0; padding: 0; width: 100%; background-color: #F2F4F6; }
.email-wrapper { width: 100%; margin: 0; padding: 0; background-color: #F2F4F6; }
.email-masthead { padding: 25px 0; text-align: center; }
.email-masthead_name { font-size: 16px; font-weight: bold; color: #2F3133; text-decoration: none; text-shadow: 0 1px 0 white; }
.email-body { width: 100%; margin: 0; padding: 0; border-top: 1px solid #EDEFF2; border-bottom: 1px solid #EDEFF2; background-color: #FFF; }
.email-body_inner { width: auto; max-width: 570px; margin: 0 auto; padding: 0; }
.email-body_cell { padding: 35px; }
.email-footer { width: auto; max-width: 570px; margin: 0 auto; padding: 0; text-align: center; }
.email-footer_cell { color: #AEAEAE; padding: 35px; text-align: center; }
.body_action { width: 100%; margin: 30px auto; padding: 0; text-align: center; }
.body_sub { margin-top: 25px; padding-top: 25px; border-top: 1px solid #EDEFF2; }
.anchor { color: #3869D4; }
.header { margin-top: 0; color: #2F3133; font-size: 19px; font-weight: bold; text-align: left; }
.paragraph { margin-top: 0; color: #74787E; font-size: 16px; line-height: 1.5em; }
.paragraph-sub { margin-top: 0; color: #74787E; font-size: 12px; line-height: 1.5em; }
.paragraph-center { text-align: center; }
.button { display: block; display: inline-block; width: 200px; min-height: 20px; padding: 10px;
background-color: #3869D4; border-radius: 3px; color: #ffffff; font-size: 15px; line-height: 25px;
text-align: center; text-decoration: none; -webkit-text-size-adjust: none; }
.button--green { background-color: #22BC66; }
.button--red { background-color: #dc4d2f; }
.button--blue { background-color: #3869D4; }
.font { font-family: Arial, \'Helvetica Neue\', Helvetica, sans-serif; }
@media only screen and (max-width: 500px) { .button { width: 100% !important; } }
</style>
</head>
<body>
<table width="100%" cellpadding="0" cellspacing="0">
<tr>
<td class="email-wrapper" align="center">
<table width="100%" cellpadding="0" cellspacing="0">
<!-- head -->
<tr>
<td class="email-masthead">
<a href="http://asistenciaclinica.com/" class="font email-masthead_name" target="_blank">
<h1>Asistencia Clinica</h1>
</a>
</td>
</tr>
<!-- body -->
<tr>
<td class="email-body" width="100%">
<table class="email-body_inner" align="center" width="570" cellpadding="0" cellspacing="0">
<tr>
<td class="email-body_cell">
<%= yield %>
</td>
</tr>
</table>
</td>
</tr>
<!-- footer -->
<tr>
<td>
<table class="email-footer" align="center" width="570" cellpadding="0" cellspacing="0">
<tr>
<td class="font email-footer_cell">
<p class="paragraph-sub paragraph-center">
<a href="https://asistenciaclinica.com/" class="font email-masthead_name" target="_blank"> asistenciaclinica.com </a>
<br>
Todos los derechos reservados.© <%= Date.today.year %>
</p>
</td>
</tr>
</table>
</td>
</tr>
</table>
</td>
</tr>
</table>
</body>
</html>