[PATCH v2 3/3] docs: CSS: make cross-reference links more evident

[Jonathan Corbet <corbet@lwn.net>]

The Sphinx Alabaster theme uses border-bottom to mark reference links; the
result does not render correctly (the underline is missing) in some browser
configurations.  Switch to using the standard text-underline property, and
use text-underline-offset to place that underline below any underscores in
the underlined text.

Suggested-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
---
 Documentation/sphinx-static/custom.css | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/sphinx-static/custom.css b/Documentation/sphinx-static/custom.css
index f4285417c71a..c9991566f914 100644
--- a/Documentation/sphinx-static/custom.css
+++ b/Documentation/sphinx-static/custom.css
@@ -136,3 +136,10 @@ div.language-selection:hover ul {
 div.language-selection ul li:hover {
     background: #dddddd;
 }
+
+/* Make xrefs more universally visible */
+a.reference, a.reference:hover {
+    border-bottom: none;
+    text-decoration: underline;
+    text-underline-offset: 0.3em;
+}
-- 
2.49.0