refactor(css): streamline tab spacing and remove redundant rules

src/display/css_html_js.py

@@ -173,6 +173,36 @@ custom_css = """
     display: none !important;
 }
 
+
+/* Contenitore tab */
+div.tabs, .tab-nav {
+    padding: 0 !important;
+    margin: 0 !important;
+    display: flex !important;
+    flex-wrap: wrap !important;
+    gap: 0 !important;
+}
+
+/* Tutti i bottoni dei tab */
+.tab-nav button, .tab-buttons button, div[class*="tab-nav"] > button {
+    margin: 0 !important;
+    padding: 2px 6px !important;
+    font-size: 16px !important;
+    line-height: 1 !important;
+    min-width: unset !important;
+    min-height: unset !important;
+    border-radius: 0 !important;
+}
+
+/* Tab separatori disabilitati */
+.tab-nav button[disabled] {
+    padding: 2px 2px !important;
+    min-width: 10px !important;
+    opacity: 0.5;
+    pointer-events: none;
+}
+
+
 """
 
 get_window_url_params = """