Expandable search using html css jquery

<div class="container">
  
   <div class="search">
                
                 <form action="">
                 <div class="searchBox">
                 <input type="text" name="" id="" class="form-control" placeholder="Search here..." >
                 <div class="close-btn">X</div>
                 <span>Search</span>
                 </div>
                 <div class="searchIcon" ><i class="fa fa-search"></i></div>
                 </form>
             
          </div>
  
  <div class="page">
      <div class="container">
    <h2>Expandable when you click on search icon</h2>
          </div>
  </div>
  
    </div>

.searchIcon { float: right; position: absolute; top: 0px;  right: 0;   width: 20px;  height: 40px; text-align: center; line-height: 40px; bottom: 5px; cursor: pointer; background: transparent; border: none;}
       .searchIcon:focus {outline: none;}
       .search {  position: relative; margin-top: 50px;  }
       .searchBox { display: none;}
       .showSearchBar { display: block; margin-top: 0px; position: relative; z-index: 9;}
       .close-btn { text-align: right; position: absolute; top: 7px;  padding-right: 10px; font-weight: 700; color: #00aff1;  font-size: 16px;  right: 0; }
       .searchBox span { display: none;}
       span.n {  position: absolute; right: 0; bottom: 0px; background: #00c5bc; height: 38px; border: none; border-radius: 0px 4px 4px 0px;  text-align: center; line-height: 38px; color: #fff;  font-weight: 600; text-transform: uppercase; font-size: 16px; padding: 0px 15px; }

<script>
        $(document).ready(function(){                        
            $('.searchIcon').click(function(){
               $('.searchBox').addClass('showSearchBar'); 
                $('.searchBox').show('showSearchBar'); 
            });            
             $(".searchBox input").focus(function(){
                 $('.searchBox span').addClass('n'); 
                 $("span").css("display", "inline").fadeIn(2000);
            });            
            $('.searchBox').focusout(function(){
                 $(this).hide(); 
            });
            $('.close-btn').click(function(){
                $('.searchBox').hide();
                //$('.searchBox').removeClass('showSearchBar');
            })
            
            $('.page').click(function(){
                $('.searchBox').hide();
            }); 
        });
    </script>