diff --git a/apps/web/src/lib/ui/data/TaskItem.svelte b/apps/web/src/lib/ui/data/TaskItem.svelte
index fce5f16..e7734f2 100644
--- a/apps/web/src/lib/ui/data/TaskItem.svelte
+++ b/apps/web/src/lib/ui/data/TaskItem.svelte
@@ -590,6 +590,14 @@
 		.actions .secondary-action {
 			flex: 0 0 auto;
 		}
+		/* Botón de completar a ancho completo en mobile */
+		.complete {
+			grid-column: 1/-1;
+			justify-self: stretch;
+		}
+		.complete .btn {
+			width: 100%;
+		}
 	}
 	@media (max-width: 480px) {
 		.task {