From 0f4312bd2ff84017e786f25601c6805c540729d8 Mon Sep 17 00:00:00 2001
From: Cristan Meijer <cristan.meijer@gmail.com>
Date: Tue, 26 May 2026 12:27:58 +0200
Subject: [PATCH 1/3] Add a job to validate the CSS

---
 .github/workflows/validate-css.yml | 13 +++++++++++++
 1 file changed, 13 insertions(+)
 create mode 100644 .github/workflows/validate-css.yml

diff --git a/.github/workflows/validate-css.yml b/.github/workflows/validate-css.yml
new file mode 100644
index 0000000..428c1b5
--- /dev/null
+++ b/.github/workflows/validate-css.yml
@@ -0,0 +1,13 @@
+name: Validate CSS
+
+on: [push, pull_request]
+
+jobs:
+  validate:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+      - uses: actions/setup-node@v6
+        with:
+          node-version: 26
+      - run: npx -y csstree-validator css/flat-remix.css

From 063fba907400022dd3a49c61b7a0d7b36e8a8bb5 Mon Sep 17 00:00:00 2001
From: Cristan Meijer <cristan.meijer@gmail.com>
Date: Tue, 26 May 2026 12:41:39 +0200
Subject: [PATCH 2/3] Fix the CSS

This wasn't valid CSS: `-webkit-touch-callout: text;`

Alternatively, we could stop doing this altogether by removing these lines and the global `-webkit-touch-callout: none` as well.
---
 css/flat-remix.css | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/css/flat-remix.css b/css/flat-remix.css
index 2751d93..3501985 100644
--- a/css/flat-remix.css
+++ b/css/flat-remix.css
@@ -188,7 +188,7 @@ code, pre {
     line-height: 2em;
     cursor: auto;
     user-select: text;
-    -webkit-touch-callout: text;
+    -webkit-touch-callout: default;
     -webkit-user-select: text;
 }
 
@@ -213,7 +213,7 @@ textarea, select {
     font-weight: bold;
     cursor: text;
     user-select: text;
-    -webkit-touch-callout: text;
+    -webkit-touch-callout: default;
     -webkit-user-select: text;
 }
 
@@ -494,6 +494,6 @@ input[type=reset]:active, input[type=reset].active,
 .selectable {
     cursor: auto;
     user-select: text;
-    -webkit-touch-callout: text;
+    -webkit-touch-callout: default;
     -webkit-user-select: text;
 }

From d807d84fc83d864f7e2b7dc12c83e069e87b59ef Mon Sep 17 00:00:00 2001
From: Cristan Meijer <cristan.meijer@gmail.com>
Date: Tue, 26 May 2026 14:11:37 +0200
Subject: [PATCH 3/3] Allow manually running the GitHub action

---
 .github/workflows/validate-css.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/validate-css.yml b/.github/workflows/validate-css.yml
index 428c1b5..b325b82 100644
--- a/.github/workflows/validate-css.yml
+++ b/.github/workflows/validate-css.yml
@@ -1,6 +1,6 @@
 name: Validate CSS
 
-on: [push, pull_request]
+on: [push, pull_request, workflow_dispatch]
 
 jobs:
   validate: