diff --git a/index.html b/index.html
index 9b2bb2a..0b828cb 100644
--- a/index.html
+++ b/index.html
@@ -24,12 +24,13 @@
   }
 
   ul {
-    display: flex;
-    flex-direction: column;
-    align-items: flex-start;
-    justify-content: center;
-    margin: 0 auto;
-    padding-left: 1.5em;
+  display: flex;
+  flex-direction: column;
+  align-items: flex-start; /* liを左揃え */
+  justify-content: center;
+  margin: 1em auto;
+  padding-left: 1.5em; /* マーカーの余白 */
+  width: max-content;  /* 中身に合わせた幅 */
   }
 
   .section {