Migrate no result page link color to CSS variables

Author: GuillaumeGomez

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

@@ -1331,6 +1331,10 @@ h3.variant {
 	display: none;
 }
 
+.search-failed a {
+	color: var(--search-failed-link-color);
+}
+
 .search-failed.active {
 	display: block;
 }

src/librustdoc/html/static/css/themes/ayu.css

@@ -39,6 +39,7 @@ Original by Dempfi (https://github.com/dempfi/ayu)
 	--sidebar-current-link-background-color: transparent;
 	--search-result-link-focus-background-color: #3c3c3c;
 	--search-result-border-color: #aaa3;
+	--search-failed-link-color: #39afd7;
 	--stab-background-color: #314559;
 	--stab-code-color: #e6e1cf;
 	--search-color: #fff;
@@ -160,10 +161,6 @@ details.rustdoc-toggle > summary::before {
 	color: #788797;
 }
 
-.search-failed a {
-	color: #39AFD7;
-}
-
 .tooltip::after {
 	background-color: #314559;
 	color: #c5c5c5;

src/librustdoc/html/static/css/themes/dark.css

@@ -34,6 +34,7 @@
 	--sidebar-current-link-background-color: #444;
 	--search-result-link-focus-background-color: #616161;
 	--search-result-border-color: #aaa3;
+	--search-failed-link-color: #0089ff;
 	--stab-background-color: #314559;
 	--stab-code-color: #e6e1cf;
 	--search-color: #111;
@@ -82,10 +83,6 @@ details.rustdoc-toggle > summary::before {
 	filter: invert(100%);
 }
 
-.search-failed a {
-	color: #0089ff;
-}
-
 .tooltip::after {
 	background-color: #000;
 	color: #fff;

src/librustdoc/html/static/css/themes/light.css

@@ -34,6 +34,7 @@
 	--sidebar-current-link-background-color: #fff;
 	--search-result-link-focus-background-color: #ccc;
 	--search-result-border-color: #aaa3;
+	--search-failed-link-color: #3873ad;
 	--stab-background-color: #fff5d6;
 	--stab-code-color: #000;
 	--search-color: #000;
@@ -69,17 +70,12 @@
 	--crate-search-hover-border: #717171;
 }
 
-
 .content .item-info::before { color: #ccc; }
 
 body.source .example-wrap pre.rust a {
 	background: #eee;
 }
 
-.search-failed a {
-	color: #3873AD;
-}
-
 .tooltip::after {
 	background-color: #000;
 	color: #fff;