diff --git a/modules/OverviewBackdrop.qml b/modules/OverviewBackdrop.qml
index 7051114..e369b0a 100644
--- a/modules/OverviewBackdrop.qml
+++ b/modules/OverviewBackdrop.qml
@@ -31,10 +31,11 @@ PanelWindow {
         anchors.fill: parent
         fragmentShader: Qt.resolvedUrl("hex_wave.frag.qsb")
 
-        // Uniforms
-        property size uResolution: Qt.size(width, height)
+        // Uniforms — order must match shader std140 layout
         property real uSize: 50.0
         property real uWavePhase: -200
+        property real _pad0: 0
+        property vector4d uResolution: Qt.vector4d(width, height, 0, 0)
         property color uC0: M.Theme.base0C
         property color uC1: M.Theme.base0E
         property color uC2: M.Theme.base09
diff --git a/modules/hex_wave.frag b/modules/hex_wave.frag
index 8ba8be2..3335303 100644
--- a/modules/hex_wave.frag
+++ b/modules/hex_wave.frag
@@ -6,14 +6,13 @@ layout(location = 0) out vec4 fragColor;
 layout(std140, binding = 0) uniform buf {
     mat4 qt_Matrix;
     float qt_Opacity;
-
-    vec2 uResolution;
     float uSize;
     float uWavePhase;
+    float _pad0;
+    vec4 uResolution;  // xy = resolution, zw unused
     vec4 uC0;
     vec4 uC1;
     vec4 uC2;
-
     vec4 uSpinners0;
     vec4 uSpinners1;
     vec4 uSpinners2;
@@ -37,7 +36,8 @@ float sdHexFlat(vec2 p, float r) {
 }
 
 void main() {
-    vec2 frag = qt_TexCoord0 * uResolution;
+    vec2 res = uResolution.xy;
+    vec2 frag = qt_TexCoord0 * res;
 
     float dx = uSize * 1.5;
     float dy = uSize * 1.7320508;
@@ -47,14 +47,12 @@ void main() {
     float row = round((frag.y - yoff) / dy);
     vec2 center = vec2(col * dx, row * dy + yoff);
 
-    // Wave factor
     float dist = center.x - uWavePhase;
     float wf = exp(-dist * dist / 9000.0);
 
     float baseR = uSize * 0.48;
     float inradius = baseR * (1.0 + 0.35 * wf);
 
-    // Check spinners
     float spinAngle = 0.0;
     vec4 spinners[12] = vec4[12](
         uSpinners0, uSpinners1, uSpinners2, uSpinners3,
@@ -81,22 +79,18 @@ void main() {
         return;
     }
 
-    // Gradient color
-    float fx = clamp(center.x / uResolution.x, 0.0, 1.0);
+    float fx = clamp(center.x / res.x, 0.0, 1.0);
     vec3 rgb = fx < 0.5
         ? mix(uC0.rgb, uC1.rgb, fx * 2.0)
         : mix(uC1.rgb, uC2.rgb, (fx - 0.5) * 2.0);
 
-    // Alpha from distance to center
-    float fy = clamp(center.y / uResolution.y, 0.0, 1.0);
+    float fy = clamp(center.y / res.y, 0.0, 1.0);
     float dc = length(vec2(fx - 0.5, fy - 0.5));
     float a = 0.03 + dc * 0.06;
 
-    // Wave brighten
     rgb = min(rgb + vec3(0.3 * wf), vec3(1.0));
     a += 0.12 * wf;
 
-    // Anti-alias
     float aa = 1.0 - smoothstep(-1.0, 0.0, d);
     a *= aa;