Hello this is Manouwer Hussain a senior Drupal expert , php full stack developer & Linux server admin for more than 11 years.
I have developed some of the biggest website ,web applications, mobile app in Drupal(6,7,8,9,10) & php like CMS, e-commerce ,web
application, mobile app which is running world wide.
I am expert in Drupal,php front end and back end development.
My strength is module development designing , custom theming using php, HTML, css, javascript, jQuery, LESS,SASS etc
,custom functionality development ,api development, third party api integration in Drupal ,site Architecture ,SEO .
I am also expert in web service development, mobile app development using PhoneGap or DrupalGap.
I also do Website performance optimization ,caching using memcache, elastic cache, varnish caching, solar search integration etc .
I have read your job post
css change sis not possible though chrome for permsment change you need to change in its code and for that code access is required.
for front end interface if given then you can change some css from front end
Waiting for your reply