leave more space on the sides

components/notebook.js

@@ -38,13 +38,13 @@ class AgenticNotebook extends HTMLElement {
                 .add-cell-btn:hover {
                     transform: translateY(-1px);
                 }
-                
                 .cells-container {
                     display: flex;
                     flex-direction: column;
                     gap: 1.5rem;
+                    padding: 0 1rem;
                 }
-            </style>
+</style>
             
             <div class="notebook-container">
                 <div class="notebook-header">