diff --git a/manage.html b/manage.html
index 84626962..67c32225 100644
--- a/manage.html
+++ b/manage.html
@@ -190,7 +190,7 @@
 
 <body id="stylus-manage" i18n-dragndrop-hint="dragDropMessage">
 
-<h1 id="header">
+<h1 id="main-header">
   <svg id="stylus-logo" width="32" height="32" viewBox="0 0 48 48">
     <path fill="#285959" d="M44.59 20.14c-.02-.86 0-13.6 0-13.6-.02-4.13-2.5-5.62-6.6-5.64H11.28C7.17.92
       4.59 2.44 4.65 6.54v14.2c0 1.64-3.02 1.55-3.02 1.55v3.48s3.05.03 3.02 1.97v13.88c0 4.15 2.5 5.63
diff --git a/manage/manage.css b/manage/manage.css
index 614d9475..a3b7ca72 100644
--- a/manage/manage.css
+++ b/manage/manage.css
@@ -81,7 +81,7 @@ a:hover {
   fill: #000;
 }
 
-#header {
+#main-header {
   background: #111;
   color: #ddd;
   position: fixed;
@@ -93,31 +93,31 @@ a:hover {
   margin: 0;
 }
 
-#header .ext-version {
+#main-header .ext-version {
   font-size: .5em;
 }
 
-#header svg {
+#main-header svg {
   vertical-align: bottom;
 }
 
-#header .tabs {
+#main-header .tabs {
   float: right;
   margin-right: 20px;
 }
 
-#header .tabs a {
+#main-header .tabs a {
   font-size: .7em;
   color: #aaa;
   text-decoration: none;
 }
 
-#header .tabs a.active,
-#header .tabs a:hover {
+#main-header .tabs a.active,
+#main-header .tabs a:hover {
   color: #c0fff0;
 }
 
-#header:lang(ja) {
+#main-header:lang(ja) {
   font-weight: normal;
 }
 
