diff --git a/public/main.css b/public/main.css
index 9c48afb..7a3d058 100644
--- a/public/main.css
+++ b/public/main.css
@@ -25,6 +25,10 @@
     --textarea-border-dark: #454545;
 }
 
+* {
+    box-sizing: border-box;
+}
+
 body {
     color: var(--text-light);
     background-color: var(--bg-light);