h1, input{
  font-family:'Exo', sans-serif;
}

body{
  background-color:#d9d9db;
  transition:background-color 0.5s;
}

h1{
  font-weight:900;
  color:#424242;
  font-size:3em;
  text-align:center;
  transition:color 0.5s;
}

#text-input{
  width:100%;
  font-size:1.5em;
  text-align:center;
  padding:0;
  margin:0;
}

#text-input:focus{
  outline:none;
}

#check-btn{
  font-size:1.6em;
  display:none;
  width:15%;
  float:right;

  outline:none;
  border:none;
  background-color:#424242;
  color:white;
  cursor:pointer;
}

.main{
  width:70%;
  margin-left:5%;
  padding:20vh 10vw 25vh 10vw;

  border:5px solid #757575;
  background-color:white;
  transition:border 0.5s;
}