inject CSS via inline <style> so it survives Spaces auto-launch

app.py

@@ -216,6 +216,7 @@ CSS = """
 """
 
 HERO_HTML = """
+<style>__MATTER_CSS__</style>
 <div id="hero">
   <span class="chip"><span class="dot"></span> Powered by Gemma 4 · On-device · CC0 Passport</span>
   <h1 style="margin-top:18px;">Material in. <em>Passport out.</em></h1>
@@ -236,7 +237,7 @@ def build_examples() -> list[list]:
 
 
 with gr.Blocks(title="Matter — Material Intelligence") as demo:
-    gr.HTML(HERO_HTML)
+    gr.HTML(HERO_HTML.replace("__MATTER_CSS__", CSS))
 
     with gr.Row():
         with gr.Column(scale=5):
@@ -297,10 +298,4 @@ with gr.Blocks(title="Matter — Material Intelligence") as demo:
 
 
 if __name__ == "__main__":
-    demo.queue(max_size=8).launch(
-        server_name="0.0.0.0",
-        show_error=True,
-        css=CSS,
-        theme=gr.themes.Base(),
-        ssr_mode=False,
-    )
+    demo.queue(max_size=8).launch(server_name="0.0.0.0", show_error=True, ssr_mode=False)