Customizing css

Trying to customize the .answer_area to text is centered. Showing in preview but not on WP page.

Using the following code:

.answer_area {text-align: center !important;
}
.cp-calc-widget .widgetForm .backButton, #preview_calc .widgetForm .backButton {
    margin: 16px 12px 12px 80px !important;}

https://www.ads-software.com/plugins/calculatorpro-calculators/