Display the "Apply for job" button

I want to display the “Apply for job” button in mobile screen? I tried to copy these two lines css script in my responsive.css

.job-manager-application-wrapper .application .application_button,.single_job_listing .application .application_button{ display: block; }
.job-manager-application-wrapper .application,.single_job_listing .application{ padding:0; margin:0 0 1em; overflow:hidden; }

But still the button is not displayed. How to fix this?

Thanks

https://www.ads-software.com/plugins/wp-job-manager/