+.devtools-menulist,
+.devtools-toolbarbutton {
+}
+
+/* Text-only buttons */
+.devtools-toolbarbutton[label]:not([text-as-image]):not([type=menu-button]),
+#toolbox-buttons .devtools-toolbarbutton[text-as-image] {
+/* background-color: rgba(0, 0, 0, .2); / Splitter */
+}
+
+/* Button States */
+.devtools-toolbarbutton:hover,
+#toolbox-buttons .devtools-toolbarbutton[text-as-image]:hover,
+.devtools-toolbarbutton[label]:not([text-as-image]):not([type=menu-button]):hover {
+/* background: rgba(0, 0, 0, .3); / Splitters */
+}
+
+.devtools-toolbarbutton:hover:active,
+#toolbox-buttons .devtools-toolbarbutton[text-as-image]:hover:active,
+.devtools-toolbarbutton[label]:not([text-as-image]):not([type=menu-button]):hover:active {
+/* background: rgba(0, 0, 0, .4); / Splitters */
+}
+
+/* Menu type buttons and checked states */
+.devtools-toolbarbutton[checked=true],
+#toolbox-buttons .devtools-toolbarbutton[text-as-image][checked] {
+/* background: rgba(29, 79, 115, .7); / Select highlight blue /
+ color: #f5f7fa;*/
+}
+
+.devtools-menulist[open=true],
+.devtools-toolbarbutton[open=true],
+.devtools-toolbarbutton[open=true]:hover,
+.devtools-toolbarbutton[open=true]:hover:active,
+.devtools-toolbarbutton[checked=true],
+.devtools-toolbarbutton[checked=true]:hover,
+#toolbox-buttons .devtools-toolbarbutton[text-as-image][checked] {
+/* background: rgba(29, 79, 115, .8); / Select highlight blue /
+ color: #f5f7fa; */
+}
+
+.devtools-toolbarbutton[checked=true]:hover {