Add DL/DeepLearning.html card to index + remove mac junk file

index.html

@@ -179,6 +179,15 @@
         .prompt-card:hover {
             border-color: #f771b6;
         }
+
+        .dl2-card .badge {
+            background: rgba(255, 107, 53, 0.1);
+            color: #ff9a5c;
+        }
+
+        .dl2-card:hover {
+            border-color: #ff9a5c;
+        }
     </style>
 </head>
 
@@ -204,7 +213,19 @@
                 </div>
             </a>
 
-            <!-- Machine Learning -->
+            <!-- DL In-Depth Tutorial -->
+            <a href="DL/DeepLearning.html" class="card dl2-card">
+                <div>
+                    <span class="badge">🧠 Deep Dive</span>
+                    <h2>Deep Learning — In-Depth Tutorial</h2>
+                    <p>Comprehensive single-page deep learning reference. Detailed theory, math derivations, and hands-on code for every major topic.</p>
+                </div>
+                <div class="card-footer">
+                    <span style="color: #ff9a5c">Read Tutorial</span>
+                    <span class="arrow">→</span>
+                </div>
+            </a>
+
             <a href="ml_complete-all-topics/index.html" class="card ml-card">
                 <div>
                     <span class="badge">Core</span>