diff --git a/core/modules/system/templates/datetime-wrapper.html.twig b/core/modules/system/templates/datetime-wrapper.html.twig
index 45ba069..bce6533 100644
--- a/core/modules/system/templates/datetime-wrapper.html.twig
+++ b/core/modules/system/templates/datetime-wrapper.html.twig
@@ -26,5 +26,5 @@
 {% endif %}
 {{ content }}
 {% if description %}
-  <div class="description">{{ description }}</div>
+  <div>{{ description }}</div>
 {% endif %}
diff --git a/core/modules/system/templates/details.html.twig b/core/modules/system/templates/details.html.twig
index 17ea820..7fa1154 100644
--- a/core/modules/system/templates/details.html.twig
+++ b/core/modules/system/templates/details.html.twig
@@ -21,7 +21,7 @@
   {%- endif -%}
   <div class="details-wrapper">
     {%- if description -%}
-      <div class="details-description">{{ description }}</div>
+      <div>{{ description }}</div>
     {%- endif -%}
     {%- if children -%}
       {{ children }}
diff --git a/core/modules/system/templates/dropbutton-wrapper.html.twig b/core/modules/system/templates/dropbutton-wrapper.html.twig
index ca0ff7e..599c6d8 100644
--- a/core/modules/system/templates/dropbutton-wrapper.html.twig
+++ b/core/modules/system/templates/dropbutton-wrapper.html.twig
@@ -14,8 +14,8 @@
 #}
 {% if children %}
   {% spaceless %}
-    <div class="dropbutton-wrapper">
-      <div class="dropbutton-widget">
+    <div>
+      <div>
         {{ children }}
       </div>
     </div>
diff --git a/core/themes/classy/templates/links.html.twig b/core/themes/classy/templates/links.html.twig
new file mode 100644
index 0000000..56c7ec2
--- /dev/null
+++ b/core/themes/classy/templates/links.html.twig
@@ -0,0 +1,60 @@
+{#
+/**
+ * @file
+ * Default theme implementation for a set of links.
+ *
+ * Available variables:
+ * - attributes: Attributes for the UL containing the list of links.
+ * - links: Links to be output.
+ *   Each link will have the following elements:
+ *   - title: The link text.
+ *   - href: The link URL. If omitted, the 'title' is shown as a plain text
+ *     item in the links list. If 'href' is supplied, the entire link is passed
+ *     to l() as its $options parameter.
+ *   - html: (optional) Whether or not 'title' is HTML. If set, the title will
+ *     not be passed through \Drupal\Component\Utility\String::checkPlain().
+ *   - attributes: (optional) HTML attributes for the anchor, or for the <span>
+ *     tag if no 'href' is supplied.
+ *   - link_key: The link CSS class.
+ * - heading: (optional) A heading to precede the links.
+ *   - text: The heading text.
+ *   - level: The heading level (e.g. 'h2', 'h3').
+ *   - attributes: (optional) A keyed list of attributes for the heading.
+ *   If the heading is a string, it will be used as the text of the heading and
+ *   the level will default to 'h2'.
+ *
+ *   Headings should be used on navigation menus and any list of links that
+ *   consistently appears on multiple pages. To make the heading invisible use
+ *   the 'visually-hidden' CSS class. Do not use 'display:none', which
+ *   removes it from screen readers and assistive technology. Headings allow
+ *   screen reader and keyboard only users to navigate to or skip the links.
+ *   See http://juicystudio.com/article/screen-readers-display-none.php and
+ *   http://www.w3.org/TR/WCAG-TECHS/H42.html for more information.
+ *
+ * @see template_preprocess_links()
+ *
+ * @ingroup themeable
+ */
+#}
+{% if links -%}
+  {%- if heading -%}
+    {%- if heading.level -%}
+      <{{ heading.level }}{{ heading.attributes }}>{{ heading.text }}</{{ heading.level }}>
+    {%- else -%}
+      <h2{{ heading.attributes }}>{{ heading.text }}</h2>
+    {%- endif -%}
+  {%- endif -%}
+  <ul{{ attributes }}>
+    {%- for key, item in links -%}
+      <li{{ item.attributes.addClass(key|clean_class) }}>
+        {%- if item.link -%}
+          {{ item.link }}
+        {%- elseif item.text_attributes -%}
+          <span{{ item.text_attributes }}>{{ item.text }}</span>
+        {%- else -%}
+          {{ item.text }}
+        {%- endif -%}
+      </li>
+    {%- endfor -%}
+  </ul>
+{%- endif %}