Update index.html

it's better

Author: avweigel

output/visualizations/index.html

@@ -342,13 +342,7 @@ <h1>Experiment Timeline Dashboard</h1>
             </div>
         </div>
     </div>
-    
-    <div class="highlight-box">
-        <div class="container">
-            <h3>🎯 Join the CellMap Segmentation Challenge</h3>
-            <p>Compete to create the next, best AI-driven image segmentation model using hundreds of our meticulously annotated high-resolution EM images as training data.</p>
-        </div>
-    </div>
+
 
     <div class="visualizations-section">
         <div class="container">
@@ -377,13 +371,13 @@ <h2>📈 Statistics Dashboard</h2>
                 </div>
 
                 <div class="viz-card">
-                    <h2>� Raw Dataset</h2>
+                    <h2>🗃️ Raw Dataset</h2>
                     <p>Access the complete experiment metadata in CSV format for custom analysis, including training parameters and performance metrics.</p>
                     <a href="https://github.com/janelia-cellmap/exp-overview/blob/main/data/processed/auto_generated_overview.csv" class="btn btn-secondary" target="_blank">Download CSV</a>
                 </div>
 
                 <div class="viz-card">
-                    <h2>� OpenOrganelle Portal</h2>
+                    <h2>🌐 OpenOrganelle Portal</h2>
                     <p>Explore our interactive data portal with high-resolution EM images and annotations used for training these models.</p>
                     <a href="https://openorganelle.janelia.org/" class="btn btn-secondary" target="_blank">Visit Portal</a>
                 </div>