diff --git a/app/javascript/styles/application.scss b/app/javascript/styles/application.scss
index 81a040108e..01c840180a 100644
--- a/app/javascript/styles/application.scss
+++ b/app/javascript/styles/application.scss
@@ -1,7 +1,5 @@
 @import 'mastodon/mixins';
 @import 'mastodon/variables';
-@import 'fonts/roboto';
-@import 'fonts/roboto-mono';
 
 @import 'mastodon/reset';
 @import 'mastodon/basics';
diff --git a/app/javascript/styles/mailer.scss b/app/javascript/styles/mailer.scss
index 18fe522eb2..16ffb8b2fe 100644
--- a/app/javascript/styles/mailer.scss
+++ b/app/javascript/styles/mailer.scss
@@ -1,5 +1,4 @@
 @import 'mastodon/variables';
-@import 'fonts/roboto';
 
 table,
 td,
diff --git a/app/javascript/styles/mastodon/basics.scss b/app/javascript/styles/mastodon/basics.scss
index 1d08b12e57..893e86a97a 100644
--- a/app/javascript/styles/mastodon/basics.scss
+++ b/app/javascript/styles/mastodon/basics.scss
@@ -19,23 +19,6 @@ body {
   -webkit-tap-highlight-color: rgba(0, 0, 0, 0%);
   -webkit-tap-highlight-color: transparent;
 
-  &.system-font {
-    // system-ui => standard property (Chrome/Android WebView 56+, Opera 43+, Safari 11+)
-    // -apple-system => Safari <11 specific
-    // BlinkMacSystemFont => Chrome <56 on macOS specific
-    // Segoe UI => Windows 7/8/10
-    // Oxygen => KDE
-    // Ubuntu => Unity/Ubuntu
-    // Cantarell => GNOME
-    // Fira Sans => Firefox OS
-    // Droid Sans => Older Androids (<4.0)
-    // Helvetica Neue => Older macOS <10.11
-    // $font-sans-serif => web-font (Roboto) fallback and newer Androids (>=4.0)
-    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI',
-      Oxygen, Ubuntu, Cantarell, 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
-      $font-sans-serif, sans-serif;
-  }
-
   &.app-body {
     padding: 0;
 
diff --git a/app/javascript/styles/mastodon/variables.scss b/app/javascript/styles/mastodon/variables.scss
index 7de25f8fd4..e0a8ab5751 100644
--- a/app/javascript/styles/mastodon/variables.scss
+++ b/app/javascript/styles/mastodon/variables.scss
@@ -58,6 +58,6 @@ $media-modal-media-max-height: 80%;
 
 $no-gap-breakpoint: 1175px;
 
-$font-sans-serif: 'mastodon-font-sans-serif' !default;
-$font-display: 'mastodon-font-display' !default;
-$font-monospace: 'mastodon-font-monospace' !default;
+$font-sans-serif: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue" !default;
+$font-display: $font-sans-serif !default;
+$font-monospace: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono" !default;