cryptcheck-rails/app/views/site/index.html.erb

<div id="check" class="container">
	<div class="row">
		<div class="col-sm-8 col-sm-offset-2">
			<h1>Vérifier votre domaine</h1>
			<form id="check_form" class="form form-horizontal">
				<div class="form-group">
					<div class="col-sm-9">
						<%= text_field_tag :check_host, nil, class: %i(form-control input-lg), placeholder: 'your-site.com' %>
					</div>
					<div class="col-sm-3">
						<%= submit_tag 'Test-moi !', class: %i(form-control btn btn-primary input-lg pull-right) %>
					</div>
				</div>
			</form>
		</div>
	</div>
</div>