Yes, this is possible.
If you look in the class.Cookiebanner.php file and do a search for “static function getCSS” you will se some CSS code.
.cookieBannerContainer
{
padding: 0px 5%;
position: fixed;
{$options['cookieBannerPosition']}: 0px;
height: {$options['cookieBannerHeight']}px;
line-height: {$options['cookieBannerHeight']}px;
background: {$options['mainColour']};
color: {$options['textColour']};
z-index: 9999;
font-size: 14px; //Edit this bit right here
opacity: 0.8;
text-align: right;
left: 0px;
right: 0px;
}
Just edit the marked bit there and you will change the font-size.
NOTE: This css class only change the font-size in desktop-mode. If you wanto to change the fontside in the mobileview you have to change this css class.
.cookieBannerText
{
font-size: 9px;
width: 95%;
}
??