Improve search style

src/librustdoc/html/static/rustdoc.css

@@ -179,7 +179,6 @@ nav.sub {
 	top: 0;
 	height: 100vh;
 	overflow: auto;
-	z-index: 1;
 }
 
 .sidebar .current {
@@ -273,9 +272,19 @@ nav.sub {
 	overflow: auto;
 	padding-left: 0;
 }
+
 #search {
 	margin-left: 230px;
+	position: relative;
+}
+
+#results {
+	position: absolute;
+	right: 0;
+	left: 0;
+	overflow: auto;
 }
+
 .content pre.line-numbers {
 	float: left;
 	border: none;