diff --git a/.gitignore b/.gitignore
index bdef460f..5117c8d0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,14 +1,15 @@
 # Deps
-node_modules
+node_modules/
 
 # Output
-/.svelte-kit
-/build
-/dist
-/dist_*
-/target
-/.gro
-/.zzz
+.svelte-kit/
+build/
+dist/
+dist_*/
+target/
+.gro/
+.fuz/
+.zzz/
 
 # Env
 .env*
diff --git a/CLAUDE.md b/CLAUDE.md
index 82afa1ba..2baa8b86 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -6,6 +6,16 @@ A modernized fork of PrismJS optimized for runtime syntax highlighting.
 
 See [README.md](./README.md).
 
+## Gro commands
+
+```bash
+gro check     # typecheck, test, lint, format check (run before committing)
+gro typecheck # typecheck only (faster iteration)
+gro test      # run tests with vitest
+gro gen       # regenerate .gen files
+gro build     # build the package for production
+```
+
 ## Commands
 
 ```bash
diff --git a/src/routes/benchmark/+page.svelte b/src/routes/benchmark/+page.svelte
index 21fb82d2..2e1fbeed 100644
--- a/src/routes/benchmark/+page.svelte
+++ b/src/routes/benchmark/+page.svelte
@@ -84,7 +84,7 @@
 <div class="box width_upto_lg mx_auto">
 	<h1 class="mt_xl5">benchmark</h1>
 	<p>
-		<code class="font_weight_400 font_size_sm">chromium --js-flags="--expose-gc"</code>
+		<code class="font-weight:400 font_size_sm">chromium --js-flags="--expose-gc"</code>
 	</p>
 
 	<section class="panel p_lg">
diff --git a/src/routes/samples/+page.svelte b/src/routes/samples/+page.svelte
index eec11ed2..d07be531 100644
--- a/src/routes/samples/+page.svelte
+++ b/src/routes/samples/+page.svelte
@@ -15,7 +15,7 @@
 	</header>
 
 	<section class="mb_xl5">
-		<h2 class="text_align_center">HTML rendering (default)</h2>
+		<h2 class="text-align:center">HTML rendering (default)</h2>
 		<aside
 			class="panel p_md mb_xl3 width_upto_md mx_auto
 		"
@@ -37,7 +37,7 @@
 	<hr class="my_xl5" />
 
 	<section id="experimental">
-		<h2 class="text_align_center">CSS Custom Highlight API (experimental)</h2>
+		<h2 class="text-align:center">CSS Custom Highlight API (experimental)</h2>
 		<aside
 			class="panel p_md mb_xl3 width_upto_md mx_auto
 		"
@@ -66,7 +66,7 @@
 		{#each Object.values(samples) as sample (sample.name)}
 			<section>
 				<h2 class="panel p_md mb_0 box">{sample.lang}</h2>
-				<div class="display_flex justify_content_center flex_wrap_wrap gap_sm py_xl5">
+				<div class="display:flex justify-content:center flex-wrap:wrap gap_sm py_xl5">
 					<div class="constrain_width">
 						<h3>{sample.lang} html strings</h3>
 						<CodeHighlight content={sample.content} lang={sample.lang} mode="html" />