Make GitHub responsive and more readable on small screens

github.css

@media (max-width: 800px){
 
  body, 
  .header {
    min-width: 0;
	}
 
  .site-search {
    width: calc(100% - 38px);
    margin-bottom: 1em;
    }
    .site-search form {
      width: 100%;
      }
      
  .repository-with-sidebar.with-full-navigation .repository-content {
    width: auto;
    }
    
  .container,
  .repository-with-sidebar .repository-content {
      /* width: calc(100% - 70px); */
      float: none;
	  width: auto;
      margin: 15px;	
      }
    .header-logged-in,  
	.repohead,
    .pagehead-actions,  
    .repository-sidebar,
    .file-history-tease,
	.file-wrap {
      display: none;
      }
}