diff --git a/django/contrib/admin/static/admin/css/base.css b/django/contrib/admin/static/admin/css/base.css
index 76316dbb1f3..18ff846d3b5 100644
--- a/django/contrib/admin/static/admin/css/base.css
+++ b/django/contrib/admin/static/admin/css/base.css
@@ -228,7 +228,6 @@ td, th {
     border-bottom: 1px solid #eee;
     vertical-align: top;
     padding: 8px;
-    font-family: "Roboto", "Lucida Grande", Verdana, Arial, sans-serif;
 }
 
 th {
@@ -615,7 +614,6 @@ div.breadcrumbs {
     background: #79aec8;
     padding: 10px 40px;
     border: none;
-    font-size: 14px;
     color: #c4dce8;
     text-align: left;
 }
@@ -670,14 +668,6 @@ a.deletelink:focus, a.deletelink:hover {
     margin-top: -48px;
 }
 
-.form-row .object-tools {
-    margin-top: 5px;
-    margin-bottom: 5px;
-    float: none;
-    height: 2em;
-    padding-left: 3.5em;
-}
-
 .object-tools li {
     display: block;
     float: left;
@@ -709,13 +699,13 @@ a.deletelink:focus, a.deletelink:hover {
     text-decoration: none;
 }
 
-.object-tools a.viewsitelink, .object-tools a.golink,.object-tools a.addlink {
+.object-tools a.viewsitelink, .object-tools a.addlink {
     background-repeat: no-repeat;
     background-position: right 7px center;
     padding-right: 26px;
 }
 
-.object-tools a.viewsitelink, .object-tools a.golink {
+.object-tools a.viewsitelink {
     background-image: url(../img/tooltag-arrowright.svg);
 }
 
@@ -890,7 +880,6 @@ table#change-history tbody th {
 }
 
 #content-related h3 {
-    font-size: 14px;
     color: #666;
     padding: 0 16px;
     margin: 0 0 16px;
diff --git a/django/contrib/admin/static/admin/css/changelists.css b/django/contrib/admin/static/admin/css/changelists.css
index 477429df14c..aec7404ce2f 100644
--- a/django/contrib/admin/static/admin/css/changelists.css
+++ b/django/contrib/admin/static/admin/css/changelists.css
@@ -142,7 +142,6 @@
 
 #changelist-filter h3 {
     font-weight: 400;
-    font-size: 14px;
     padding: 0 15px;
     margin-bottom: 10px;
 }
diff --git a/django/contrib/admin/static/admin/css/login.css b/django/contrib/admin/static/admin/css/login.css
index 062b36e0512..b60be906423 100644
--- a/django/contrib/admin/static/admin/css/login.css
+++ b/django/contrib/admin/static/admin/css/login.css
@@ -34,10 +34,6 @@
     height: auto;
 }
 
-.login #content-main {
-    width: 100%;
-}
-
 .login .form-row {
     padding: 4px 0;
     float: left;
@@ -48,9 +44,7 @@
 .login .form-row label {
     padding-right: 0.5em;
     line-height: 2em;
-    font-size: 1em;
     clear: both;
-    color: #333;
 }
 
 .login .form-row #id_username, .login .form-row #id_password {
@@ -60,11 +54,6 @@
     box-sizing: border-box;
 }
 
-.login span.help {
-    font-size: 10px;
-    display: block;
-}
-
 .login .submit-row {
     clear: both;
     padding: 1em 0 0 9.4em;
diff --git a/django/contrib/admin/static/admin/css/responsive.css b/django/contrib/admin/static/admin/css/responsive.css
index e1ce9c27d1f..642640d2e5f 100644
--- a/django/contrib/admin/static/admin/css/responsive.css
+++ b/django/contrib/admin/static/admin/css/responsive.css
@@ -907,7 +907,7 @@ input[type="submit"], button {
         padding: 15px 0 0;
     }
 
-    .login br, .login .submit-row label {
+    .login br {
         display: none;
     }
 
diff --git a/django/contrib/admin/static/admin/css/rtl.css b/django/contrib/admin/static/admin/css/rtl.css
index f4916d32822..a4dae47d478 100644
--- a/django/contrib/admin/static/admin/css/rtl.css
+++ b/django/contrib/admin/static/admin/css/rtl.css
@@ -1,7 +1,3 @@
-body {
-    direction: rtl;
-}
-
 /* LOGIN */
 
 .login .form-row {
diff --git a/tests/admin_views/tests.py b/tests/admin_views/tests.py
index 5fe6919ea88..a3a60ba1810 100644
--- a/tests/admin_views/tests.py
+++ b/tests/admin_views/tests.py
@@ -4822,6 +4822,23 @@ class SeleniumTests(AdminSeleniumTestCase):
         value = self.selenium.find_element_by_id('id_form-0-parent').get_attribute('value')
         self.assertEqual(value, str(parent2.pk))
 
+    def test_input_element_font(self):
+        """
+        Browsers' default stylesheets override the font of inputs. The admin
+        adds additional CSS to handle this.
+        """
+        self.selenium.get(self.live_server_url + reverse('admin:login'))
+        element = self.selenium.find_element_by_id('id_username')
+        # Some browsers quotes the fonts, some don't.
+        fonts = [
+            font.strip().strip('"')
+            for font in element.value_of_css_property('font-family').split(',')
+        ]
+        self.assertEqual(
+            fonts,
+            ['Roboto', 'Lucida Grande', 'Verdana', 'Arial', 'sans-serif'],
+        )
+
 
 @override_settings(ROOT_URLCONF='admin_views.urls')
 class ReadonlyTest(AdminFieldExtractionMixin, TestCase):