make stlye of reset password page match design

app/views/devise/passwords/new.html.erb

@@ -1,15 +1,23 @@
-<h2>Forgot your password?</h2>
+<% content_for :before_content do %>
+  <%= link_to 'Back', :back, class: "govuk-back-link" %>
+<% end %>
 
 <%= form_for(resource, as: resource_name, url: password_path(resource_name), html: { method: :post }) do |f| %>
+  <div class="govuk-grid-row">
+    <div class="govuk-grid-column-two-thirds">
+      <h1 class="govuk-heading-l">Reset password</h1>
       <%= render "devise/shared/error_messages", resource: resource %>
 
-  <div class="field">
-    <%= f.label :email %><br />
-    <%= f.email_field :email, autofocus: true, autocomplete: "email" %>
+      <p class="govuk-body">Enter the email address you used to create your account.</p>
+      <p class="govuk-body">We’ll email you a link to reset your password. This link will expire in 3 hours.</p>
+
+      <div class="govuk-form-group">
+        <%= f.label :email, "Email address", class: "govuk-label" %>
+        <%= f.email_field :email, autofocus: true, autocomplete: "email", class: "govuk-input" %>
       </div>
 
-  <div class="actions">
-    <%= f.submit "Send me reset password instructions" %>
+      <%= f.submit "Send email", class: "govuk-button" %>
+    </div>
   </div>
 <% end %>
 

app/views/devise/shared/_links.html.erb

@@ -1,5 +1,5 @@
 <%- if controller_name != 'sessions' %>
-  <%= link_to "Log in", new_session_path(resource_name) %><br />
+  <p class="govuk-body">Already have an account?<%= link_to "Sign in", new_session_path(resource_name) %>.</p><br />
 <% end %>
 
 <%- if devise_mapping.registerable? && controller_name != 'registrations' %>