body {
  font-family: Arial, sans-serif;
  background-color: #0d0d0d;
  color: #00ffcc;
  text-align: center;
  padding: 50px;
}
.container {
  max-width: 600px;
  margin: auto;
}
h1 {
  font-size: 3em;
  color: #ff00ff;
  text-shadow: 0 0 10px #ff00ff;
}
input {
  padding: 10px;
  width: 60%;
  margin-top: 20px;
}
button {
  padding: 10px 20px;
  margin-left: 10px;
  background-color: #00ffcc;
  border: none;
  cursor: pointer;
}
button:hover {
  background-color: #00cc99;
}
#result {
  margin-top: 20px;
  font-size: 1.5em;
  color: #ffff66;
}