h1 {
text-align:center; 
font-size:2em;
color:navy;
padding:20px;
margin:15px
}

#huh {
  height:290px;
  text-align:center;
  margin:700px 20px auto 20px
  
}

#huh:hover {
   transition: height 0.4s;
   height:300px;
  
}