Easter egg: bigger button, microscope emoji, more visible at rest

app.py

@@ -229,16 +229,16 @@ div[data-testid="stPopover"] {
     z-index: 9999;
 }
 div[data-testid="stPopover"] button {
-    opacity: 0.08;
+    opacity: 0.22;
     transition: opacity 0.25s ease;
-    font-size: 13px;
+    font-size: 22px;
     color: #aaa;
     border: none;
     background: transparent;
-    padding: 4px 8px;
+    padding: 4px 10px;
 }
 div[data-testid="stPopover"] button:hover {
-    opacity: 0.6;
+    opacity: 0.75;
 }
 </style>
 """, unsafe_allow_html=True)
@@ -255,7 +255,7 @@ with title_col:
     st.caption("Dual BERTweet model · type a social media post to classify it.")
 
 with egg_col:
-    with st.popover("◉"):
+    with st.popover("🔬"):
         st.markdown(ABOUT_MD)