ruby on rails - nothing changes when making change in assets fiels -

i'm trying make change in css file seems not responding if deleted whole file, still loaded in page,

i've tried remove assets folder public , made

bundle exec rake assets:clean bundle exec rake assets:precompile 

but nothing changed that's development config file

rails.application.configure   # settings specified here take precedence on in config/application.rb.   config.action_mailer.default_url_options = { host: 'localhost', port: 3000 }   # in development environment application's code reloaded on   # every request. slows down response time perfect development   # since don't have restart web server when make code changes.    config.cache_classes = false    # not eager load code on boot.   config.eager_load = false    # show full error reports , disable caching.   config.consider_all_requests_local       = true   config.action_controller.perform_caching = false    # don't care if mailer can't send.   config.action_mailer.raise_delivery_errors = false    # print deprecation notices rails logger.   config.active_support.deprecation = :log    # raise error on page load if there pending migrations.   config.active_record.migration_error = :page_load    # debug mode disables concatenation , preprocessing of assets.   # option may cause significant delays in view rendering large   # number of complex assets.   config.assets.debug = true    # adds additional error checking when serving assets @ runtime.   # checks improperly declared sprockets dependencies.   # raises helpful error messages.   config.assets.raise_runtime_errors = true    # raises error missing translations   # config.action_view.raise_on_missing_translations = true end