.fer{
     font-weight: bolder; 
      font-size:20px;  
      
  }
  
  body{
      
     font-family:Sans-Serif;
       
      
  }
  
  h1{
      
   text-align: center;
   
   color:forestgreen;
   margin: 30px 0 50px;
      
      
  }
  
  .gallery{
      
    margin:10px 50px ;  
      
  }
  
  
  
  .gallery img{
      
   width:230px;  
   padding:5px;
   filter:grayscale(100%);
   
   transition:1s;
      
  }
  
  .gallery img:hover{
      
      filter:grayscale(0);
      transform:scale(1.1);
      
  }