Ok we have figure out the issue. While customizing the styles on style.css file, on line no: 4194, you have missed the ;
on the end of the line. It should be like this as below:
font-size: 25px;
and on line no: 3983 and 3984. remove the below commented style properties.
/* top: 0px; */
/* left: -50px; */
You have customized the styles by making changes on the main theme style.css file but instead of customizing on main style.css file, we recommend you to customize the styles through ‘Additional CSS’ Option which you can find on ‘Appearance > Customize > Additional CSS’. other wise all your customizes styles will be lost when you update the theme to new version when available.
If you are customizing by making changes on other files with scripts then we recommend you make the Child Theme, then you can make changes on Child theme.
Thanks