Vertical Tab Alignment

Thank you for the nice plugin. I am having an issue with the vertical tab option. The text box is below the tabs. I can change the width of the tabs column slightly 30% down to 25% and it pops up where it should be. I cannot change this in the customizer in the additional css on the site. The value is overwritten by what is in the plugin css file.

.child-pages-tab.style-vertical .ui-tabs-nav {
    float: left;
    width: 30%;
}