diff --git a/src/App.vue b/src/App.vue
index cceb156..24bbbf3 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -83,6 +83,8 @@ const polarHalfChart = reactive({
     width 100%
     height 100%
     background-image url('assets/imgs/bg.png')
+    background-size 100% 120%
+    background-position center
     .main-body
         display grid
         grid-template-columns 400px 1fr 400px