body {
  font-family: 'Segoe UI', sans-serif;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  background: #f0f4f8;
  margin: 0;
}

.container {
  background: #ffffff;
  padding: 2rem 3rem;
  border-radius: 12px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
  max-width: 400px;
  width: 100%;
}

h1 {
  text-align: center;
  color: #333;
}

input {
  width: 100%;
  padding: 0.8rem;
  margin-top: 1rem;
  border: 1px solid #ccc;
  border-radius: 6px;
}

button {
  width: 100%;
  padding: 0.8rem;
  margin-top: 1rem;
  background-color: #0077ff;
  color: #fff;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 1rem;
  transition: background 0.3s;
}

button:hover {
  background-color: #005fcc;
}

.result {
  margin-top: 1.5rem;
  font-size: 1.1rem;
  text-align: center;
  color: #222;
}