diff --git a/public/src/uncloseai-embed-modal.js b/public/src/uncloseai-embed-modal.js
index 6320da0..b2b3b36 100644
--- a/public/src/uncloseai-embed-modal.js
+++ b/public/src/uncloseai-embed-modal.js
@@ -372,7 +372,9 @@ async function openUncloseaiEmbeddedModalNew() {
 		} else {
 			// Vault locked or doesn't exist - show centered prompt using CSS grid
 			vaultSection.style.display = 'grid';
-			vaultSection.style.placeItems = 'center';
+			vaultSection.style.placeContent = 'center';
+			vaultSection.style.height = '100%';
+			vaultSection.style.minHeight = '400px';
 			vaultSection.style.border = 'none';
 			vaultSection.style.padding = '20px';
 			const hasVault = UncloseVault.hasVault();