body {
      background-color: #f8f9fa;
    }
    .sidebar {
      height: 100vh;
      background: #343a40;
      color: white;
    }
    .sidebar a {
      color: white;
      text-decoration: none;
      display: block;
      padding: 1rem;
    }
    .sidebar a:hover {
      background: #495057;
    }
    .card {
      border: none;
      transition: transform 0.3s;
    }
    .card:hover {
      transform: scale(1.05);
    }

    /*Start_Quiz*/

        .quiz-box {
      max-width: 800px;
      margin: 2rem auto;
      background: #fff;
      padding: 2rem;
      border-radius: 10px;
      box-shadow: 0 0 10px rgba(0,0,0,0.1);
    }
    .option-label:hover {
      background-color: #f1f1f1;
      cursor: pointer;
    }
    .hidden {
      display: none;
    }