diff --git a/web/public/css/general.css b/web/public/css/general.css
index 53c0f19..465cc41 100644
--- a/web/public/css/general.css
+++ b/web/public/css/general.css
@@ -147,4 +147,5 @@ td {
 	flex-direction: row;
 	justify-content: space-between;
 	flex-wrap: wrap;
+	row-gap: 10px;
 }
diff --git a/web/public/index.html b/web/public/index.html
index c2f7235..00c6d28 100644
--- a/web/public/index.html
+++ b/web/public/index.html
@@ -29,7 +29,7 @@
 <h1>Welcome to Tanabata!</h1>
 <main>
 	<h2>Select Tanabata service</h2>
-	<div class="contents-wrapper">
+	<div class="contents-wrapper button-flex">
 		<a href="/auth" class="btn btn-primary">Authorize</a>
 		<a href="/tfm" class="btn btn-primary">File Manager</a>
 		<a href="/tdbms" class="btn btn-primary">Database Management</a>
diff --git a/web/public/tdbms/index.html b/web/public/tdbms/index.html
index eb26007..97a4b32 100644
--- a/web/public/tdbms/index.html
+++ b/web/public/tdbms/index.html
@@ -32,19 +32,19 @@
 <h1>Tanabata Database Management</h1>
 <main>
 	<h2><span>TDB: 「<span class="db_name"><i>none</i></span>」</span></h2>
-	<div class="contents-wrapper">
+	<div class="contents-wrapper button-flex">
 		<a href="/tdbms/stats" class="btn btn-primary">Stats</a>
 		<a href="/tdbms/sasahyou" class="btn btn-primary">Sasahyou</a>
 		<a href="/tdbms/sappyou" class="btn btn-primary">Sappyou</a>
 		<a href="/tdbms/shoppyou" class="btn btn-primary">Shoppyou</a>
 	</div>
-	<div class="contents-wrapper">
+	<div class="contents-wrapper button-flex">
 		<button class="btn btn-outline-success" id="btn-save">Save database</button>
 		<button class="btn btn-outline-warning" id="btn-reload">Reload database</button>
 		<a href="/tdbms/new" class="btn btn-outline-info">Create database</a>
 		<button class="btn btn-outline-danger" id="btn-remove">Remove database</button>
 	</div>
-	<div class="contents-wrapper">
+	<div class="contents-wrapper button-flex">
 		<a href="/" class="btn btn-secondary">Home</a>
 		<a href="/tdbms/settings" class="btn btn-secondary">Settings</a>
 	</div>
diff --git a/web/public/tfm/index.html b/web/public/tfm/index.html
index 47a5f14..d3f9142 100644
--- a/web/public/tfm/index.html
+++ b/web/public/tfm/index.html
@@ -30,15 +30,15 @@
 <h1>Tanabata File Manager</h1>
 <main>
 	<h2>Come on, what to do?</h2>
-	<div class="contents-wrapper">
+	<div class="contents-wrapper button-flex">
 		<a href="/tfm/files" class="btn btn-primary">Files</a>
 		<a href="/tfm/tags" class="btn btn-primary">Tags</a>
 	</div>
-	<div class="contents-wrapper">
+	<div class="contents-wrapper button-flex">
 		<button class="btn btn-outline-success" id="btn-save">Save database</button>
 		<button class="btn btn-outline-warning" id="btn-reload">Reload database</button>
 	</div>
-	<div class="contents-wrapper">
+	<div class="contents-wrapper button-flex">
 		<a href="/" class="btn btn-secondary">Home</a>
 		<a href="/tfm/settings" class="btn btn-secondary">Settings</a>
 	</div>