diff --git a/app/javascript/images/background-kosmos.jpg b/app/javascript/images/background-kosmos.jpg
new file mode 100644
index 000000000..6be143274
Binary files /dev/null and b/app/javascript/images/background-kosmos.jpg differ
diff --git a/app/javascript/styles/custom.scss b/app/javascript/styles/custom.scss
new file mode 100644
index 000000000..2f4eb176f
--- /dev/null
+++ b/app/javascript/styles/custom.scss
@@ -0,0 +1,26 @@
+@import 'application';
+
+body {
+  background-color: $ui-base-color;
+  background-image: url('../images/background-kosmos.jpg');
+  background-size: cover;
+  background-attachment: fixed;
+}
+
+body.about-body {
+  background-color: transparent;
+  background-image: url('../images/background-kosmos.jpg');
+  background-size: cover;
+  background-attachment: fixed;
+}
+
+.landing-page .learn-more-cta {
+  background: rgba(31,35,43,0.5);
+}
+
+.ui {
+  background-color: darken($ui-base-color, 7%);
+  background-image: url('../images/background-kosmos.jpg');
+  background-size: cover;
+  background-attachment: fixed;
+}
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 829cd61d0..acc0707de 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -52,8 +52,8 @@ en:
       suspended_title: Suspended servers
     unavailable_content_html: Mastodon generally allows you to view content from and interact with users from any other server in the fediverse. These are the exceptions that have been made on this particular server.
     user_count_after:
-      one: user
-      other: users
+      one: kosmonaut
+      other: kosmonauts
     user_count_before: Home to
     what_is_mastodon: What is Mastodon?
   accounts:
diff --git a/config/themes.yml b/config/themes.yml
index 9c21c9459..d032b009d 100644
--- a/config/themes.yml
+++ b/config/themes.yml
@@ -1,3 +1,3 @@
-default: styles/application.scss
+default: styles/custom.scss
 contrast: styles/contrast.scss
 mastodon-light: styles/mastodon-light.scss