Set a maxwidth for content

Closes #10

static/style.css

@@ -97,4 +97,9 @@ button.round {
 div.centered {
 	align-content: center;
 	display: flex;
+}
+
+.maxwidth {
+	max-width: 70em;
+	margin: auto;
 }
\ No newline at end of file

templates/index.tpl

@@ -4,7 +4,7 @@
 
 {{ define "content" }}
 <div class="content pure-u-1">
-	<table class="box pure-table">
+	<table class="maxwidth box pure-table">
 		<thead><tr><th>#</th><th>Rating</th><th class="fill">Name</th></tr></thead>
 		<tbody>
 		{{ range .Wines }}
@@ -19,7 +19,7 @@
 </div>
 
 <footer class="box pure-u-1">
-	<form class="pure-form" method="POST" enctype="multipart/form-data" action="/add">
+	<form class="maxwidth pure-form" method="POST" enctype="multipart/form-data" action="/add">
 		<fieldset>
 			<div class="pure-g">
 				<div class="pad-right pure-u-3-4">