app/views/layouts/mailer.html.erb
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<style>
body {
font-family: "Fira Sans", Helvetica, Arial, sans-serif;
}
img.img-icon {
width: 1.2em;
}
ul {
padding: 0.2em;
}
li {
border-radius: 0;
border-top: 1px solid rgba(0, 0, 0, 0.12);
box-shadow: none;
display: block;
font-size: 0.9375rem;
line-height: 1.428572;
min-height: 3rem;
position: relative;
}
section {
margin: .5em 0 0;
padding: 0 0 1em;
}
section h2 {
background-color: #5f8e43;
color: #ffffff;
box-shadow: 1px 1px 1px 1px #c9c0b2;
color: $white;
padding: .2em;
}
</style>
</head>
<body><%= yield %></body>
</html>