diff --git a/rio/session.py b/rio/session.py
index d3880280..4f87cf3c 100644
--- a/rio/session.py
+++ b/rio/session.py
@@ -2913,7 +2913,7 @@ a.remove();
         return fill._serialize(self)
 
     def _host_and_get_fill_as_css_variables(
-        self, fill: fills._FillLike
+        self, fill: text_style._TextFill
     ) -> dict[str, str]:
         if isinstance(fill, rio.Color):
             return {
@@ -2933,16 +2933,10 @@ a.remove();
                 "backdrop-filter": "none",
             }
 
-        if isinstance(fill, rio.FrostedGlassFill):
-            return {
-                "color": f"#{fill.color.hexa}",
-                "background": "none",
-                "background-clip": "unset",
-                "fill-color": "unset",
-                "backdrop-filter": f"blur({fill.blur_size}rem)",
-            }
-
-        assert isinstance(fill, (rio.LinearGradientFill, rio.ImageFill)), fill
+        assert isinstance(
+            fill,
+            (rio.LinearGradientFill, rio.ImageFill, rio.RadialGradientFill),
+        ), fill
         return {
             "color": "var(--rio-local-text-color)",
             "background": fill._as_css_background(self),
diff --git a/rio/text_style.py b/rio/text_style.py
index 8a3dff06..ed9a539a 100644
--- a/rio/text_style.py
+++ b/rio/text_style.py
@@ -13,7 +13,12 @@ import rio
 from . import utils
 from .assets import Asset, HostedAsset, PathAsset
 from .color import Color
-from .fills import ImageFill, LinearGradientFill, SolidFill
+from .fills import (
+    ImageFill,
+    LinearGradientFill,
+    RadialGradientFill,
+    SolidFill,
+)
 from .self_serializing import SelfSerializing
 
 __all__ = [
@@ -26,7 +31,9 @@ __all__ = [
 logging.getLogger("CSSUTILS").setLevel(logging.CRITICAL)
 
 
-_TextFill = SolidFill | LinearGradientFill | ImageFill | Color
+_TextFill = (
+    SolidFill | LinearGradientFill | ImageFill | Color | RadialGradientFill
+)
 
 
 @dataclasses.dataclass(frozen=True)