Update static/index.html

static/index.html

@@ -117,7 +117,14 @@
   .status.error { color: #ef4444; }
   .status.success { color: #22c55e; }
   .preview { display: flex; flex-direction: column; align-items: center; gap: 0.5rem; }
-  .preview img { max-width: 160px; border-radius: 8px; border: 1px solid #222238; image-rendering: pixelated; }
+  .preview img {
+    max-width: 100%;
+    width: 300px;
+    height: 300px;
+    border-radius: 8px;
+    border: 1px solid #222238;
+    image-rendering: pixelated;
+}
   .download { font-size: 0.8rem; color: #a78bfa; cursor: pointer; text-decoration: underline; }
   .size-tag { font-size: 0.75rem; color: #444460; }
   .decoded-text {