diff --git a/src/css/styles.css b/src/css/styles.css
index 19ed457..86022a8 100644
--- a/src/css/styles.css
+++ b/src/css/styles.css
@@ -1,3 +1,8 @@
+* {
+  box-sizing: border-box;
+  margin: 0 auto;
+}
+
 header {
   background-color: grey;
   color: white;