My blog looks without CSS style and I can’t go to Admin section

Quite strange. When, I try to connect to:
https://praguebuzz.com/home/wp-content/themes/chameleon-10/style.css
Your server behaves like this file doesn’t exist.
So, either there is a file permission (it should be 644), or your files were badly uploaded. Try to upload them again.

Thanks PoxHonks for the reply. How do you set the file permission?

I didn’t temper with any thing. All I did right before was creating a new homepage and delete the old one.

You change file permissions with your FTP software, then select a file, and try to find the “information”, or “file permission” menu or function.
Then, give read permission to User, Group and All (this is 444).
Removing all write permissions is a way to stop some hackers from editing your file, your file will be read only, locked. It works in most situation, but it is not 100% hacker proof !

Read this:
https://www.stadtaus.com/en/tutorials/chmod-ftp-file-permissions.php