How to make it responsive? [closed]

i have a Wordpress website called https://sibersaldirilar.com But it is not responsive correctly. When you go home page or other pages it is responsive. But if you go this page "https://sibersaldirilar.com/programlama/python-nesne-tabanli-programlama/" from your mobile devices it isnt responsive. The post body bigger than main container. How can make it responsive?