Rustdoc accessibility: use real headers for doc items

Part of #87059

Partially reverts #84703

Preview at: https://notriddle.com/notriddle-rustdoc-test/real-headers/std/index.html

4 files changed, 15 insertions, 8 deletions

diff --git a/src/librustdoc/html/static/css/rustdoc.css b/src/librustdoc/html/static/css/rustdoc.css
index 6672093eb7b..f124d7aec6c 100644
--- a/src/librustdoc/html/static/css/rustdoc.css
+++ b/src/librustdoc/html/static/css/rustdoc.css
@@ -146,6 +146,13 @@ h1.fqn > .in-band > a:hover {
 h2, h3, h4 {
 	border-bottom: 1px solid;
 }
+h3.code-header, h4.code-header {
+	font-size: 1em;
+	font-weight: 600;
+	border: none;
+	padding: 0;
+	margin: 0;
+}
 .impl,
 .impl-items .method,
 .methods .method,
@@ -233,7 +240,7 @@ details:not(.rustdoc-toggle) summary {
 	margin-bottom: .6em;
 }
 
-code, pre, a.test-arrow {
+code, pre, a.test-arrow, .code-header {
 	font-family: "Source Code Pro", monospace;
 }
 .docblock code, .docblock-short code {
@@ -520,7 +527,7 @@ nav.sub {
 	font-weight: normal;
 }
 
-.method > code, .trait-impl > code, .invisible > code {
+.method > .code-header, .trait-impl > .code-header, .invisible > .code-header {
 	max-width: calc(100% - 41px);
 	display: block;
 }
@@ -536,7 +543,7 @@ nav.sub {
 	padding: 0px;
 }
 
-.in-band > code {
+.in-band > code, .in-band > .code-header {
 	display: inline-block;
 }
 
@@ -742,7 +749,7 @@ a {
 }
 
 .invisible > .srclink,
-.method > code + .srclink {
+.method > .code-header + .srclink {
 	position: absolute;
 	top: 0;
 	right: 0;
@@ -1103,7 +1110,7 @@ a.test-arrow:hover{
 	left: -10px;
 }
 
-:target > code {
+:target > code, :target > .code-header {
 	opacity: 1;
 }
 
diff --git a/src/librustdoc/html/static/css/themes/ayu.css b/src/librustdoc/html/static/css/themes/ayu.css
index 354cdd2fb03..df386fb66a3 100644
--- a/src/librustdoc/html/static/css/themes/ayu.css
+++ b/src/librustdoc/html/static/css/themes/ayu.css
@@ -334,7 +334,7 @@ a.test-arrow:hover {
 	color: #999;
 }
 
-:target, :target * {
+:target, :target > * {
 	background: rgba(255, 236, 164, 0.06);
 }
 
diff --git a/src/librustdoc/html/static/css/themes/dark.css b/src/librustdoc/html/static/css/themes/dark.css
index b4f5a13c815..c8a5dbdc66a 100644
--- a/src/librustdoc/html/static/css/themes/dark.css
+++ b/src/librustdoc/html/static/css/themes/dark.css
@@ -282,7 +282,7 @@ a.test-arrow:hover{
 	color: #999;
 }
 
-:target, :target * {
+:target, :target > * {
 	background-color: #494a3d;
 }
 
diff --git a/src/librustdoc/html/static/css/themes/light.css b/src/librustdoc/html/static/css/themes/light.css
index 29cbcd65ce8..bc18a724508 100644
--- a/src/librustdoc/html/static/css/themes/light.css
+++ b/src/librustdoc/html/static/css/themes/light.css
@@ -274,7 +274,7 @@ a.test-arrow:hover{
 	color: #999;
 }
 
-:target, :target * {
+:target, :target > * {
 	background: #FDFFD3;
 }