see if this makes a diff..

Gemfile

@@ -48,7 +48,6 @@ gem 'rails-html-sanitizer'
 gem 'rack-cors', '~> 2.0'
 gem 'responders'
 gem 'rubyzip', '~> 2.3.0' # 3.0 will be breaking
-gem 'sassc-rails', '~> 2.1'
 gem 'solid_cable', '~> 3.0'
 gem 'solid_queue'
 gem 'thor'
@@ -94,3 +93,9 @@ group :test do
   gem 'capybara'
   gem 'selenium-webdriver'
 end
+
+gem "dartsass-rails", "~> 0.5.1"
+
+gem "sprockets-rails", "~> 3.5"
+
+gem "sassc-rails", "~> 2.1"

Gemfile.lock

@@ -148,6 +148,9 @@ GEM
     csv (3.3.0)
     d3-rails (3.5.17)
       railties (>= 3.1)
+    dartsass-rails (0.5.1)
+      railties (>= 6.0.0)
+      sass-embedded (~> 1.63)
     date (3.4.0)
     debug (1.9.2)
       irb (~> 1.10)
@@ -206,6 +209,15 @@ GEM
       ffi (~> 1.0)
     globalid (1.2.1)
       activesupport (>= 6.1)
+    google-protobuf (4.29.0-aarch64-linux)
+      bigdecimal
+      rake (>= 13)
+    google-protobuf (4.29.0-x86_64-darwin)
+      bigdecimal
+      rake (>= 13)
+    google-protobuf (4.29.0-x86_64-linux)
+      bigdecimal
+      rake (>= 13)
     hashdiff (1.1.1)
     hashie (5.0.0)
     heapy (0.2.0)
@@ -451,6 +463,12 @@ GEM
     ruby-statistics (4.0.1)
     ruby2_keywords (0.0.5)
     rubyzip (2.3.2)
+    sass-embedded (1.81.0-aarch64-linux-gnu)
+      google-protobuf (~> 4.28)
+    sass-embedded (1.81.0-x86_64-darwin)
+      google-protobuf (~> 4.28)
+    sass-embedded (1.81.0-x86_64-linux-gnu)
+      google-protobuf (~> 4.28)
     sassc (2.4.0)
       ffi (~> 1.9)
     sassc-rails (2.1.2)
@@ -554,6 +572,7 @@ DEPENDENCIES
   colorize
   cookies_eu
   d3-rails (~> 3.5.5)
+  dartsass-rails (~> 0.5.1)
   debug
   derailed_benchmarks
   devise (>= 4.6.2)
@@ -597,6 +616,7 @@ DEPENDENCIES
   simplecov
   solid_cable (~> 3.0)
   solid_queue
+  sprockets-rails (~> 3.5)
   thor
   turbo-rails (~> 2.0, >= 2.0.5)
   vega