body {
  background-color: #000;
  color: #fff;
  font-family: 'Arial', sans-serif;
  text-align: center;
  margin: 0;
  padding: 0;
}

.container {
  max-width: 500px;
  margin: 100px auto;
  padding: 30px;
  background-color: #111;
  border: 2px solid gold;
  border-radius: 10px;
}

h2 {
  color: gold;
}

input[type="email"] {
  width: 80%;
  padding: 10px;
  border-radius: 6px;
  border: 1px solid #ccc;
  margin-top: 10px;
}

.button {
  background-color: gold;
  color: black;
  padding: 10px 25px;
  margin-top: 20px;
  border: none;
  border-radius: 8px;
  font-weight: bold;
  cursor: pointer;
}

.button:hover {
  background-color: #fff;
  color: #000;
}

.message {
  color: lightgreen;
  margin-bottom: 15px;
  font-weight: bold;
}