Add spacing below accuracy table

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

style.css

@@ -405,6 +405,10 @@ tbody tr.row-group-break td {
     scrollbar-color: var(--text-dim) var(--border);
     scrollbar-width: thin;
 }
+#accuracy-section {
+    margin-bottom: 1.5rem;
+}
+
 .legend-section {
     margin: 2rem 0;
     padding-top: 1.5rem;