app/views/email_notifications_mailer/registration_confirmed.html.erb
<html>
<body>
<%= render 'email_header' %>
<div style="padding-left: 100px;padding-right: 100px;padding-top: 30px;">
<%= render 'greetings', event: @event, attendance: @attendance %>
<p><%= I18n.t('attendances.confirmed_message', event_name: @event.name) %></p>
<p><%= I18n.t('attendances.confirmed_message_event_date', event_start_date: l(@event.start_date, format: :short)) %></p>
<p><%= link_to I18n.t('attendances.registrations_page'), event_attendance_url(@event, @attendance) %></p>
<br/>
<p><%= I18n.t('attendances.confirmed.see_ya') %></p>
<p><%= I18n.t('attendances.event_team', event_name: @event.name) %></p>
</div>
</body>
</html>