Integrate bevel rendering capability natively into Backplate container widget

 src/backend/window_runner.rs      |  4 ++++
 src/widget/container/backplate.rs | 18 ++++++++++++++++++
 src/widget/mod.rs                 |  1 +
 3 files changed, 23 insertions(+)

diff --git a/src/backend/window_runner.rs b/src/backend/window_runner.rs
index e15590c..6f3aa38 100644
--- a/src/backend/window_runner.rs
+++ b/src/backend/window_runner.rs
@@ -797,6 +797,10 @@ pub fn push_widget_vertices(w: &dyn crate::widget::Element, sw: f32, sh: f32, cl
         push_plate_solid_border_vertices(x, y, ww, h, radii, thickness, sw, sh, color, clip_circle, out);
     }
 
+    if let Some(thickness) = w.plate_bevel() {
+        push_plate_bevel_vertices(x, y, ww, h, radii.top_left, thickness, sw, sh, clip_circle, out);
+    }
+
     for (cx, cy, r, t, start, end, qc) in w.extra_arcs() {
         push_arc_background_vertices(cx, cy, r, t, start, end, sw, sh, qc, 16, clip_circle, out);
     }
diff --git a/src/widget/container/backplate.rs b/src/widget/container/backplate.rs
index bf8eda2..e844a99 100644
--- a/src/widget/container/backplate.rs
+++ b/src/widget/container/backplate.rs
@@ -13,6 +13,8 @@ pub struct Backplate {
     pub background_color: Option<[f32; 4]>,
     pub visible: bool,
     pub movable: bool,
+    pub bevel: bool,
+    pub bevel_thickness: f32,
 }
 
 impl Backplate {
@@ -27,6 +29,8 @@ impl Backplate {
             background_color: None,
             visible: true,
             movable: true,
+            bevel: false,
+            bevel_thickness: 1.5,
         }
     }
 
@@ -50,6 +54,12 @@ impl Backplate {
         self.radius = radius;
         self
     }
+
+    pub fn with_bevel(mut self, bevel: bool, thickness: f32) -> Self {
+        self.bevel = bevel;
+        self.bevel_thickness = thickness;
+        self
+    }
 }
 
 impl Element for Backplate {
@@ -147,6 +157,14 @@ impl Element for Backplate {
         self.border_color.map(|c| (c, self.border_thickness))
     }
 
+    fn plate_bevel(&self) -> Option<f32> {
+        if self.bevel {
+            Some(self.bevel_thickness)
+        } else {
+            None
+        }
+    }
+
     fn corner_radius(&self) -> f32 {
         if self.radius < 0.0 {
             crate::color::backplate_corner_radius()
diff --git a/src/widget/mod.rs b/src/widget/mod.rs
index 5097b11..8ff3950 100644
--- a/src/widget/mod.rs
+++ b/src/widget/mod.rs
@@ -420,6 +420,7 @@ pub trait Element {
 
     fn color(&self) -> [f32; 4];
     fn solid_border(&self) -> Option<([f32; 4], f32)> { None }
+    fn plate_bevel(&self) -> Option<f32> { None }
 
     fn is_dragging(&self) -> bool { false }
     fn drag_update(&mut self, _px: f32, _py: f32) -> bool { false }