fix: positioned bytmdialog padding

src/components/BytmDialog.css

@@ -36,12 +36,12 @@
 
 .bytm-dialog.align-top {
   top: 0;
-  transform: translate(-50%, 40px);
+  transform: translate(-50%, 20px);
 }
 
 .bytm-dialog.align-bottom {
   top: 100%;
-  transform: translate(-50%, -100%);
+  transform: translate(-50%, calc(-100% - 20px));
 }
 
 .bytm-dialog-body {