From 100abd26afcae36ef678f443cf2ff5431756924c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micka=C3=ABl=20Canouil?=
 <8896044+mcanouil@users.noreply.github.com>
Date: Thu, 5 Nov 2026 15:48:57 +0100
Subject: [PATCH 1/2] fix: centre the highlighted-lines chip text

The chip's line box keeps room for descenders that a label such as
"L1-3" never uses, so in Chromium the text sat about 1px above the
middle. Browsers that support text-box now trim the line box to the
cap height and the baseline, and the padding sets the space instead.
Firefox does not support text-box yet and keeps the old layout.
---
 CHANGELOG.md                      |  4 ++++
 _extensions/code-window/style.css | 10 ++++++++++
 2 files changed, 14 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9de8113..e783dee 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+### Bug Fixes
+
+- fix: Centre the text of the highlighted-lines chip vertically in browsers that support `text-box`. The label no longer sits closer to the top border.
+
 ## 1.8.1 (2026-11-05)
 
 ### Bug Fixes
diff --git a/_extensions/code-window/style.css b/_extensions/code-window/style.css
index c739eb2..c4f886d 100644
--- a/_extensions/code-window/style.css
+++ b/_extensions/code-window/style.css
@@ -95,6 +95,16 @@ body.quarto-dark .code-with-filename .code-with-filename-file {
   overflow-wrap: break-word;
 }
 
+/* The line box keeps room for descenders that a label such as "L1-3" does not
+ * have. Trim it to the cap height and the baseline, so the padding alone sets
+ * the space above and below the text. */
+@supports (text-box: trim-both cap alphabetic) {
+  .code-with-filename .code-with-filename-file .code-with-filename-lines {
+    padding-block: 0.3em;
+    text-box: trim-both cap alphabetic;
+  }
+}
+
 /* Code block content area */
 .code-with-filename .sourceCode,
 .code-with-filename div.sourceCode,

From c7b146e3d2c57c5ac5d5464abb564218c7665434 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micka=C3=ABl=20Canouil?=
 <8896044+mcanouil@users.noreply.github.com>
Date: Thu, 5 Nov 2026 15:50:16 +0100
Subject: [PATCH 2/2] docs: shorten the chip changelog entry [skip ci]

---
 CHANGELOG.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index e783dee..dc0a7ee 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,7 @@
 
 ### Bug Fixes
 
-- fix: Centre the text of the highlighted-lines chip vertically in browsers that support `text-box`. The label no longer sits closer to the top border.
+- fix: Centre the text of the highlighted-lines chip vertically in browsers that support `text-box`. (#86)
 
 ## 1.8.1 (2026-11-05)