Make every standalone doc use rustdoc.css

src/bootstrap/doc.rs

@@ -374,9 +374,15 @@ fn run(self, builder: &Builder<'_>) {
             }
 
             if filename == "not_found.md" {
-                cmd.arg("--markdown-css").arg("https://doc.rust-lang.org/rust.css");
+                cmd.arg("--markdown-css")
+                    .arg(format!("https://doc.rust-lang.org/rustdoc{}.css", &builder.version))
+                    .arg("--markdown-css")
+                    .arg("https://doc.rust-lang.org/rust.css");
             } else {
-                cmd.arg("--markdown-css").arg("rust.css");
+                cmd.arg("--markdown-css")
+                    .arg(format!("rustdoc{}.css", &builder.version))
+                    .arg("--markdown-css")
+                    .arg("rust.css");
             }
             builder.run(&mut cmd);
         }

src/doc/rust.css

@@ -38,6 +38,7 @@ h5, h6 {
 
 h1 {
 	font-size: 28px;
+	font-weight: 500;
 	padding: .1em .4em;
 	border-bottom: 2px solid #ddd;
 }
@@ -47,10 +48,12 @@ h1.title {
 h2 {
 	font-size: 26px;
 	padding: .2em .5em;
+	border-bottom: 1px solid #ddd;
 }
 h3 {
 	font-size: 24px;
 	padding: .2em .7em;
+	border-bottom: 1px solid #DDE8FC;
 }
 h4 {
 	font-size: 22px;
@@ -105,7 +108,9 @@ footer {
 /* Links layout */
 
 a {
+	text-decoration: none;
 	color: #428BCA;
+	background: transparent;
 }
 a:hover, a:focus {
 	color: #2A6496;