rustdoc: don't use overflow for main, instead make the sidebar sticky

Author: cynecx

src/librustdoc/html/static/css/rustdoc.css

@@ -257,8 +257,7 @@ main {
 	position: relative;
 	flex-grow: 1;
 	padding: 10px 15px 40px 45px;
-	height: 100vh;
-	overflow-y: auto;
+	min-width: 0;
 }
 
 .source main {
@@ -325,12 +324,13 @@ nav.sub {
 .sidebar {
 	width: 200px;
 	overflow-y: scroll;
+	position: sticky;
+	min-width: 200px;
+	height: 100vh;
 }
 
 .rustdoc.source .sidebar {
-	overflow-y: auto;
-	min-width: 200px;
-	height: 100vh;
+	overflow: auto;
 }
 
 .source .sidebar {
@@ -1675,10 +1675,8 @@ details.rustdoc-toggle[open] > summary.hideme::after {
 	}
 
 	main {
-		height: auto;
 		padding-left: 15px;
 		padding-top: 0px;
-		overflow-y: visible;
 	}
 
 	.rustdoc {
@@ -1704,6 +1702,15 @@ details.rustdoc-toggle[open] > summary.hideme::after {
 		z-index: 11;
 	}
 
+	.sidebar.mobile {
+		position: sticky !important;
+		top: 0;
+		left: 0;
+		width: 100%;
+		margin-left: 0;
+		background-color: rgba(0,0,0,0);
+	}
+
 	.sidebar > .location {
 		float: right;
 		margin: 0px;
@@ -1839,15 +1846,6 @@ details.rustdoc-toggle[open] > summary.hideme::after {
 		height: 50px;
 	}
 
-	.sidebar.mobile {
-		position: sticky;
-		top: 0;
-		left: 0;
-		width: 100%;
-		margin-left: 0;
-		background-color: rgba(0,0,0,0);
-	}
-
 	.show-it, .sidebar-elems:focus-within {
 		z-index:  2;
 		left: 0;