body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    margin: 0;
    flex-direction: column;
    animation: fadeIn 1s ease-in-out;
  }
  
  @keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
  }
  
  @keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
  }
  
  marquee {
    width: 100%;
    background-color: rgba(0, 0, 0, 0.4);
    padding: 10px;
    font-size: 18px;
    color: #fff;
    font-weight: bold;
  }
  
  .quiz-box {
    background: rgba(255, 255, 255, 0.1);
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
    width: 350px;
    text-align: center;
    backdrop-filter: blur(10px);
    animation: bounceIn 1s ease;
  }
  
  @keyframes bounceIn {
    0% {
      transform: scale(0.8);
      opacity: 0;
    }
    60% {
      transform: scale(1.1);
      opacity: 1;
    }
    100% {
      transform: scale(1);
    }
  }
  
  h2 {
    font-size: 22px;
    margin-bottom: 20px;
  }
  
  button {
    margin: 10px 0;
    padding: 12px 18px;
    width: 100%;
    border: none;
    background: linear-gradient(135deg, #1de9b6, #1dc4e9);
    color: #fff;
    font-size: 16px;
    border-radius: 8px;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  }
  
  button:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
  }
  
  .result {
    margin-top: 20px;
    font-weight: bold;
    font-size: 18px;
  }