Update style.css

css/style.css

@@ -19,6 +19,10 @@ body {
     font-weight: initial;
 }
 
+.modal-overlay {
+    opacity: 0.8 !important;   
+}
+
 .btn-flat.disabled, .btn-flat:disabled, .btn-flat[disabled], .btn-floating.disabled, .btn-floating:disabled, .btn-floating[disabled], .btn-large.disabled, .btn-large:disabled, .btn-large[disabled], .btn-small.disabled, .btn-small:disabled, .btn-small[disabled], .btn.disabled, .btn:disabled, .btn[disabled], .disabled.btn-large, .disabled.btn-small {
     pointer-events: none;
     background-color: grey !important;