[myuver]

solved the problem.

[myuver]

already solve the problem. Tnx

[myuver]

i think this plugin will help you to hide the top bar https://wordpress.org/plugins/wp-admin-no-show/ and about the size try this code

bbpress-forums .bbp-topic-content p,
bbpress-forums .bbp-reply-content p {

font-size: 12px; /* enter the size u want */

}