min or ui fixes

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

@@ -1,6 +1,9 @@
-<h2>Login</h2>
+<h2 class="mb-4 text-center">Login</h2>
 
-<%= form_for(resource, as: resource_name, url: session_path(resource_name)) do |f| %>
+<div class="container">
+  <div class="row justify-content-center">
+    <div class="col-12 col-md-6 col-lg-4">
+      <%= form_for(resource, as: resource_name, url: session_path(resource_name)) do |f| %>
         <div class="mb-3">
           <%= f.label :email %>
           <%= f.email_field :email, autofocus: true, class: "form-control" %>
@@ -16,7 +19,10 @@
           <%= f.label :remember_me, class: "form-check-label" %>
         </div>
 
-  <%= f.submit "Login", class: "btn btn-primary" %>
-<% end %>
+        <%= f.submit "Login", class: "btn btn-primary w-100" %>
+      <% end %>
 
-<%= render "devise/shared/links" %>
+      <%= render "devise/shared/links" %>
+    </div>
+  </div>
+</div>

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

@@ -0,0 +1,21 @@
+<div class="mt-4">
+      <div class="mb-3">
+        <% if controller_name != 'sessions' %>
+          <%= link_to "➡️ Login", new_session_path(resource_name), class: "btn btn-outline-primary w-100 mb-2" %>
+        <% end %></div>
+
+      <div class="mb-3">
+        <% if devise_mapping.registerable? && controller_name != 'registrations' %>
+          <%= link_to "📝 Registrieren", new_registration_path(resource_name), class: "btn btn-outline-success w-100 mb-2" %>
+        <% end %></div>
+
+      <div class="mb-3">
+        <% if devise_mapping.recoverable? && controller_name != 'passwords' %>
+          <%= link_to "🔁 Passwort vergessen?", new_password_path(resource_name), class: "btn btn-outline-warning w-100 mb-2" %>
+        <% end %></div>
+      <div class="mb-3">
+        <% if devise_mapping.confirmable? && controller_name != 'confirmations' %>
+          <%= link_to "📨 Bestätigung erneut senden", new_confirmation_path(resource_name), class: "btn btn-outline-info w-100" %>
+        <% end %>
+      </div>
+</div>