diff --git a/tailwind.config.cjs b/tailwind.config.cjs
index 5722cf4..f175ff3 100644
--- a/tailwind.config.cjs
+++ b/tailwind.config.cjs
@@ -3,6 +3,16 @@ const config = {
 
   theme: {
     extend: {},
+    screens: {
+      'lg': {'min': '1024px'},
+      // => @media (max-width: 1023px) { ... }
+
+      'md': {'max': '1023px'},
+      // => @media (max-width: 767px) { ... }
+
+      'sm': {'max': '639px'},
+      // => @media (max-width: 639px) { ... }
+    }
   },
 
   plugins: [