Hola,
Debe agregar el código en el archivo style.css presente en la carpeta de su tema.
Hi
You must add this code in your style.css file included in your theme directory.
.gdpr.gdpr-privacy-bar .gdpr-agreement, .gdpr.gdpr-reconsent-bar .gdpr-agreement {
position: relative;
font-size: 13px;
font-weight: normal;
padding: 0 10px 1px;
height: auto;
line-height: 26px;
white-space: normal;
margin: 0;
border-width: 1px;
border-style: solid;
border-radius: 3px;
-webkit-box-sizing: border-box;
box-sizing: border-box;
background: #0085ba;
border-color: #0073aa #006799 #006799;
-webkit-box-shadow: 0 1px 0 #006799;
box-shadow: 0 1px 0 #006799;
color: #fff;
text-decoration: none;
text-shadow: 0 -1px 1px #006799, 1px 0 1px #006799, 0 1px 1px #006799, -1px 0 1px #006799;
}