header{
       background:blue;
 text-align:center;
}


 nav a{  
    color:aqua;
    text-decoration:none;
    font-size:20px;
    padding: 20px;  
 }

 main h1{
   text-align: center; 
 }

 main img{
   display: block;
   margin-left:auto;
   margin-right: auto;
   width:270px;
   border-radius: 15px;
 }
 main img:hover{
   transform: scale(1,2);
 }

 body{
   background:gray ;
   font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
 }
 main{
   background-color: white;
   padding: 100px;
   margin-top: 20px;
   margin-left: auto;
   margin-right: auto;
   width: 80%;
 border-radius: 10px;
 }

 header nav a :hover{
  background: burlywood(95,95,213);
 }

 .footer_osn{
  background-color: black;
  padding: 23px 10;
  text-align: center;
  margin-left: 45px;
  margin-right: 45px;
  margin-top: 20px;
 }
 .footer_content{
  font-size: 20px;
 }
 .footer_content a{
  color: white;
  text-decoration: none;
transition: color 0.5s ease;
 }
 .footer_content a:hover{
  color: gray(95,95,200);
 }