.op{
  display: none;;
}
h1{
  text-align: center;
  font-family: 'K2D', sans-serif;
  font-weight: bold;
  font-size: 60px;
  margin-top: 50px;
  margin-left: 30px;
  margin-bottom: 60px;
  padding: 10px;
  color: #ba2b0b;
}
h1:hover{
  font-size: 65px;
  color: #10a028 ;
}
body{
  background-image: url(../img/bg.jpg); ;
} 
form{
  padding-left: 40px; 
  font-size: 25px
}
.op{
  font-size: 30px;
  font-family: 'Libre Baskerville', serif; 
}
p{
  font-size: 35px;
  color: #3b33c6;
}
button{
  font-size: 25px;
}
#reverse, #output{
  color: #05a83b;
}
.btn: hover{
  font-size: 30px;
  color: orange;
}