Remove redundant table header CSS styling

Clean up previously added CSS selectors for table headers, removing duplicate styling rules while preserving the core design approach

app.py

@@ -100,22 +100,6 @@ st.markdown("""
         background-color: #DAA520;
         cursor: pointer;
     }
-
-    /* Table header styling */
-    .dvn-underlay [role="columnheader"] {
-        background-color: #FFD700 !important;
-        color: white !important;
-        font-weight: bold !important;
-        border-radius: 10px !important;
-        padding: 10px 20px !important;
-        text-align: center !important;
-    }
-
-    /* Hover effect for table headers */
-    .dvn-underlay [role="columnheader"]:hover {
-        background-color: #DAA520 !important;
-        cursor: pointer;
-    }
 </style>""", unsafe_allow_html=True)
 
 def calculate_poisson(row):