body {
  font-family: 'Segoe UI', sans-serif;
  background: #0f0f0f;
  color: #f0f0f0;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}
.container {
  text-align: center;
  background: #1a1a1a;
  padding: 40px;
  border-radius: 12px;
  box-shadow: 0 0 20px rgba(0, 255, 200, 0.2);
}
input {
  width: 100%;
  max-width: 400px;
  padding: 12px;
  margin-top: 20px;
  border: none;
  border-radius: 6px;
}
button {
  padding: 12px 24px;
  margin-top: 16px;
  background-color: #00ffc8;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-weight: bold;
}
button:hover {
  background-color: #00bfa6;
}
#result {
  margin-top: 20px;
}