/* defaultでの使用を前提（他のスタイルを考慮せず）*/
#nav-bar .toolbarbutton-1:not([type=menu-button]),
#nav-bar .toolbarbutton-1 > .toolbarbutton-menubutton-button,
#nav-bar .toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker {
/*
padding: var(--toolbarbutton-vertical-outer-padding) 2px;
*/
padding-top: 0px;
padding-bottom: 0px;
}
#back-button {
/*
padding-top: 3px !important;
padding-bottom: 3px !important;
*/
padding-top: 0px !important;
padding-bottom: 0px !important;
margin-top: -3px;
margin-bottom: -3px;
}