CSS cleanup for Premium promo modal

app/shared-components/PremiumPromoModal/PremiumPromoModal.jsx

@@ -51,7 +51,7 @@ const PremiumPromoModal = (props) => {
 					<ModalExitButton className="InsightsModal__exitButton" toggleModal={handleXClick} />
 				)}
 				<div className="PremiumPromoModal__midnight-logo" />
-				<div id="ivzflex">
+				<div className="PremiumPromoModal__main-content-container">
 					<div className="PremiumPromoModal__header">
 						<div className="PremiumPromoModal__header-text">
 							<span>{t('try_ghostery_midnight')}</span>

app/shared-components/PremiumPromoModal/PremiumPromoModal.scss

@@ -31,11 +31,11 @@ $condensed-font-family: Roboto Condensed, "Open Sans", "Helvetica Neue", Helveti
   background-image: url('/app/images/panel/midnight-logo.svg');
 }
 
-#ivzflex {
+.PremiumPromoModal__main-content-container {
+  height: 210px;
   display: flex;
   flex-direction: column;
   align-items: center;
-  height: 210px;
   justify-content: space-evenly;
 }