.container {
  max-width: 400px;
  margin: auto;
  background: #fff;
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

input {
  width: 100%;
  padding: 10px;
  margin-bottom: 12px;
  border: 1px solid #ccc;
  border-radius: 6px;
}

button {
  width: 100%;
  padding: 12px;
  background: #007BFF;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
}

button:hover {
  background: #0056b3;
}

.message {
  margin-top: 20px;
  padding: 10px;
  background: #e6ffe6;
  border: 1px solid #b2ffb2;
  color: #2d662d;
  border-radius: 6px;
}

@media screen and (max-width: 480px) {
  .container {
    padding: 20px;
  }

  input, button {
    font-size: 16px;
  }

  h2 {
    font-size: 20px;
  }
}