diff --git a/assets/js/lightbox.js b/assets/js/lightbox.js
index fd27ff3..af7e428 100644
--- a/assets/js/lightbox.js
+++ b/assets/js/lightbox.js
@@ -1,5 +1,6 @@
-$(document).ready(function() {
-    $('div.wp-caption a:first').click(function(event) {
+jQuery(document).ready(function() {
+    const $ = jQuery;
+    $('div.wp-caption a:first-child').click(function(event) {
         event.preventDefault();
         var imgSrc = $(this).attr('href');
         $('#lightbox-img').attr('src', imgSrc);
diff --git a/style.css b/style.css
index 0bb9d12..762dc3e 100644
--- a/style.css
+++ b/style.css
@@ -181,8 +181,8 @@ a h5 {
 .lightbox-content {
     margin: auto;
     display: block;
-    width: 80%;
-    max-width: 700px;
+    max-width: 80vw;
+    max-height: 90vh;
 }
 
 .lightbox-close {