body {
    font-family: Arial, sans-serif;
    background: linear-gradient(to right, #4facfe, #00f2fe);
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    overflow: hidden;
  }
  .container {
    background: white;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    padding: 30px;
    max-width: 600px;
    width: 100%;
    animation: fadeIn 1s ease;
  }
  @keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
  }
  h1, h2 {
    text-align: center;
  }
  .question {
    margin: 20px 0;
  }
  button {
    padding: 10px 20px;
    margin-top: 10px;
    background-color: #00c6ff;
    border: none;
    color: white;
    font-size: 16px;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.3s;
  }
  button:hover {
    background-color: #007a99;
  }
  .hidden {
    display: none;
  }
  input {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
    border-radius: 8px;
    border: 1px solid #ccc;
  }