body{
  font-family:sans-serif;
  background:#0f172a;
  color:white;
  text-align:center;
}
.app{
  margin-top:100px;
}
input{
  padding:10px;
  width:250px;
}
button{
  padding:10px 20px;
  margin-left:10px;
}
img{
  margin-top:20px;
}