diff --git a/src/modify_ssh.html b/src/modify_ssh.html
index 8d0d47a..3612ef6 100644
--- a/src/modify_ssh.html
+++ b/src/modify_ssh.html
@@ -11,16 +11,17 @@
     .center {
         margin-left: auto;
         margin-right: auto;
+    }
+    .center, .center th, .center td {
+        border: 1px solid white;
+    }
 
-        & table, & th {
-            border: 1px solid;
-        }
+    .center {
+        border-spacing: 0;
+    }
 
-        & td {
-            border: 1px solid;
-            width: fit-content;
-            white-space: nowrap;
-        }
+    .center th, .center td {
+        margin: 3px;
     }
 
     #key_table {