diff --git a/dot_config/fontconfig/conf.d/10-sans-serif.conf b/dot_config/fontconfig/conf.d/10-sans-serif.conf
new file mode 100644
index 0000000..2e93ff1
--- /dev/null
+++ b/dot_config/fontconfig/conf.d/10-sans-serif.conf
@@ -0,0 +1,14 @@
+<?xml version='1.0'?>
+<!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>
+<fontconfig>
+  <alias>
+    <family>sans-serif</family>
+    <prefer>
+      <family>Noto Sans</family>
+      <family>Noto Color Emoji</family>
+      <family>Noto Emoji</family>
+      <family>DejaVu Sans</family>
+    </prefer>
+  </alias>
+</fontconfig>
+
diff --git a/dot_config/fontconfig/conf.d/20-serif.conf b/dot_config/fontconfig/conf.d/20-serif.conf
new file mode 100644
index 0000000..bf854c5
--- /dev/null
+++ b/dot_config/fontconfig/conf.d/20-serif.conf
@@ -0,0 +1,14 @@
+<?xml version='1.0'?>
+<!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>
+<fontconfig>
+  <alias>
+    <family>serif</family>
+    <prefer>
+      <family>Noto Serif</family>
+      <family>Noto Color Emoji</family>
+      <family>Noto Emoji</family>
+      <family>DejaVu Serif</family>
+    </prefer>
+  </alias>
+</fontconfig>
+
diff --git a/dot_config/fontconfig/conf.d/30-monospace.conf b/dot_config/fontconfig/conf.d/30-monospace.conf
new file mode 100644
index 0000000..1f971d2
--- /dev/null
+++ b/dot_config/fontconfig/conf.d/30-monospace.conf
@@ -0,0 +1,19 @@
+<?xml version="1.0"?>
+<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
+<fontconfig>
+  <alias>
+    <family>monospace</family>
+    <prefer>
+      <family>Operator Mono</family>
+    </prefer>
+  </alias>
+  <match target="pattern">
+    <test qual="any" name="family">
+      <string>Operator Mono</string>
+    </test>
+    <edit name="weight" mode="assign">
+      <int>200</int> <!-- 200 is commonly used for bold weights -->
+    </edit>
+  </match>
+</fontconfig>
+