refactor

static/css/styles.css

@@ -26,18 +26,17 @@ table {
     margin-top: 20px;
 }
 
-table,
 th,
 td {
     border: 1px solid #ddd;
-}
-
-th,
-td {
     padding: 12px;
     text-align: left;
 }
 
+tfoot td {
+    border: none;
+}
+
 button {
     background-color: #4CAF50;
     color: white;