diff --git a/index.php b/index.php
index aa56ba8..b65028a 100644
--- a/index.php
+++ b/index.php
@@ -61,28 +61,7 @@
 
 	<title>停留所のNexTrip情報</title>
 
-	<style>
-		* { box-sizing: border-box; }
-		@media screen and (min-width: 780px) {
-			body { max-width: 768px; margin: 0 auto; }
-		}
-		h1, h2, h3 { margin-bottom: 0.5rem; }
-		h2 { border-bottom: 1px solid gray; margin-bottom: 0.5rem; }
-		hr { border: none; border-top: 1px solid gray; }
-		.alert { margin-left: 0; padding-left: 1rem; border-left: 3px solid black; }
-		.alert.success { border-color: lime; }
-		.alert.info { border-color: blue; }
-		.alert.warning { border-color: gold; }
-		.alert.danger { border-color: red; }
-		.btn.danger, span.danger { color: red; }
-		.btn.warning, span.warning { color: gold; }
-		.unstyled-list { list-style: none; padding-left: 0; }
-		.inline-list { list-style: none; margin-top: 0; }
-		.inline-list li { display: inline-block; }
-		.grid-wrapper { display: grid; grid-template-columns: repeat(auto-fill, 100px); }
-		.d-flex { display: -webkit-flex; display: -moz-flex; display: flex; }
-		.flex-fill { -webkit-flex: 1 1 auto; -moz-flex: 1 1 auto; flex: 1 1 auto; }
-	</style>
+	<link href="style.css" rel="stylesheet">
 </head>
 <body>
 	<?php
