Wording.

app.py

@@ -345,8 +345,8 @@ with blocks:
         <div class="f1-container">
         <p class="f1-hero">
             A benchmark of <strong>220</strong> novel, expert-level algorithmic problems over graphs that demand deep dynamic
-            programming and logical reasoning. <strong>Warmup</strong> and <strong>Tier&nbsp;1</strong> span moderate through
-            challenging problems, while <strong>Tier&nbsp;2</strong> is research-level.
+            programming and logical reasoning. <strong>Shallow</strong> and <strong>Deeper</strong> tiers span moderate through
+            challenging problems, while <strong>Deepest</strong> is research-level.
         </p>
         </div>
         """,