body{
  background-color: #151515;
 
}
.link{
   color:#fff;
  text-decoration:none;
  font-size:20px;
}
.link:hover{
  color:white;
}

.center {
  display: block;
  margin-left: auto;
  margin-right: auto;
  
}
.head-cat{
 color:white; 
}