Don't freeze Emacs on colour codes in sccs-mode

* lisp/textmodes/css-mode.el (css--font-lock-keywords): Don't
freeze Emacs on #ffffff #ffffff, and be more strict in parsing
selectors (bug#53203).

1 files changed, 6 insertions, 0 deletions

diff --git a/test/lisp/textmodes/css-mode-resources/scss-selectors.txt b/test/lisp/textmodes/css-mode-resources/scss-selectors.txt
new file mode 100644
index 00000000000..86e58110b72
--- /dev/null
+++ b/test/lisp/textmodes/css-mode-resources/scss-selectors.txt
@@ -0,0 +1,6 @@
+p.#{$name} var
+p.#{$name}:active var
+p.#{$name}::after var
+f.#{$bar}::after p::after
+p.#{$name} f.#{$bar} k.var #{$bar}  #{$bar}
+p.#{$name}