diff --git a/public_html/css/post-list.css b/public_html/css/post-list.css
index 82de7aed..7db2c1b0 100644
--- a/public_html/css/post-list.css
+++ b/public_html/css/post-list.css
@@ -3,16 +3,26 @@
 }
 
 .post-list .search {
-	margin-bottom: 1em;
+	margin: 0 auto 1em auto;
 	text-align: left;
 }
+@media all and (min-width: 57em) {
+	.post-list .search {
+		min-width: 50em;
+	}
+}
+@media all and (max-width: 57em) {
+	.post-list .search {
+		min-width: 100%;
+	}
+}
 .post-list .search:after {
 	display: block;
 	content: '';
 	clear: both;
 }
 .post-list .search input {
-	width: 20em;
+	max-width: 20em;
 }
 .post-list .search button {
 	margin-left: 0.25em;
diff --git a/public_html/js/Presenters/PostListPresenter.js b/public_html/js/Presenters/PostListPresenter.js
index b1f500a5..c2e503c0 100644
--- a/public_html/js/Presenters/PostListPresenter.js
+++ b/public_html/js/Presenters/PostListPresenter.js
@@ -158,8 +158,7 @@ App.Presenters.PostListPresenter = function(
 		if ($firstPost.length === 0) {
 			return;
 		}
-		$el.find('.search').css('margin-left', $firstPost.offset().left - $list.offset().left);
-		$el.find('.search').css('margin-right', $list.width() - ($lastPost.offset().left - $list.offset().left + $lastPost.width()));
+		$el.find('.search').width($lastPost.offset().left + $lastPost.width() - $firstPost.offset().left);
 	}
 
 	function postTagButtonClicked(e) {