diff --git a/app/components/preview/PaperSimulator.vue b/app/components/preview/PaperSimulator.vue
index c1ad2e8..2701668 100644
--- a/app/components/preview/PaperSimulator.vue
+++ b/app/components/preview/PaperSimulator.vue
@@ -149,13 +149,21 @@ function handleVariableClick(segment: TextSegment) {
 /* Font B con doble alto */
 .line-content.font-b.text-double-height {
   transform: scaleX(0.825) scaleY(2);
-  transform-origin: top left;
 }
 
 /* Font B con doble ancho Y alto */
 .line-content.font-b.text-double-width.text-double-height {
   transform: scale(1.65, 2);
-  transform-origin: top left;
+}
+
+/* Transform origin para líneas centradas - permite que scale funcione correctamente con flexbox center */
+.align-center .line-content.font-b.text-double-width,
+.align-center .line-content.font-b.text-double-height,
+.align-center .line-content.font-b.text-double-width.text-double-height,
+.align-center .line-content.text-double-width,
+.align-center .line-content.text-double-height,
+.align-center .line-content.text-double-width.text-double-height {
+  transform-origin: center;
 }
 
 /* Línea vacía (feed) */