body {
      font-family: 'Inter', sans-serif;
      background: #1a1a1a;
      color: #e5e5e5;
      margin: 0;
      padding: 2rem;
      max-width: 800px;
      margin: 0 auto;
    }
    h1 {
      text-align: center;
      color: #fff;
    }
    .question {
      margin-bottom: 2rem;
    }
    .question h2 {
      font-size: 1.2rem;
      margin-bottom: 0.5rem;
    }
    .options {
      list-style: none;
      padding: 0;
    }
    .options li {
      margin: 0.5rem 0;
    }
    button {
      background: linear-gradient(135deg, #4a4a4a 0%, #7a7a7a 100%);
      color: white;
      border: none;
      padding: 1rem 2rem;
      border-radius: 8px;
      cursor: pointer;
      font-weight: bold;
      transition: background 0.3s ease;
      margin: 1rem 0;
    }
    button:hover {
      background: linear-gradient(135deg, #7a7a7a 0%, #a0a0a0 100%);
    }
    .result {
      margin-top: 2rem;
      padding: 1.5rem;
      background: rgba(255, 255, 255, 0.1);
      border-radius: 12px;
    }
    .result p {
      font-size: 1.2rem;
    }
    .error {
      color: #ff4d4d;
    }