Correct errors site

I run a checkup of my site and found these errors. I need someone to correct all these errors of the CSS, html etc, without changing the design of the site. The site also has to be .htaccess

http://validator.w3.org/check?uri=zonnelichtkinderopvang.nl
http://jigsaw.w3.org/css-validator/validator?uri=www.zonnelichtkinderopvang.nl
http://validator.w3.org/unicorn/check?ucn_uri=zonnelichtkinderopvang.nl&ucn_task=conformance#
http://validator.w3.org/mobile/check?docAddr=zonnelichtkinderopvang.nl&async=false

thanks
Brendan