Delete backgound for ID with conditional if statement

Take a look at the classes offered by your body_class() function to your <body> element. Then overwrite your div with the ID #main on your posts page with a higher specifity and set this div to display: none;.

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)