body {
     font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
     line-height: 1.6;
     color: #333;
     background-color: #fff;
 }

 .quiz-container {
     max-width: 800px;
     margin: 0 auto;
     padding: 20px;
 }

 .container .quiz-container h1{
    text-align: center;
    margin-bottom: 20px;
    color: blue;
 }

 .quiz-question {
     background: #fff;
     border-radius: 8px;
     padding: 20px;
     margin-bottom: 20px;
     box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
 }

 .question-text {
     font-size: 1.2rem;
     margin-bottom: 15px;
     font-weight: 500;
 }


 .options {
     margin: 15px 0;
 }

 .option {
     margin: 10px 0;
     padding: 10px 15px;
     border: 1px solid #ddd;
     border-radius: 5px;
     cursor: pointer;
     transition: all 0.3s;
 }

 .option:hover {
     background: #f8f9fa;
 }

 .option.selected {
     background: #e7f4ff;
     border-color: #007bff;
 }

 .option.correct {
     background: #d4edda;
     border-color: #28a745;
 }

 .option.incorrect {
     background: #f8d7da;
     border-color: #dc3545;
 }

 .show-answer-btn {
     background: #007bff;
     color: white;
     border: none;
     padding: 8px 16px;
     border-radius: 4px;
     cursor: pointer;
     margin-top: 10px;
     transition: background 0.3s;
 }

 .show-answer-btn:hover {
     background: #0056b3;
 }

 .show-answer-btn.showing {
     background: #6c757d;
 }

 .answer-explanation {
     display: none;
     margin-top: 15px;
     padding: 15px;
     background: #f8f9fa;
     border-radius: 5px;
     border-right: 4px solid #007bff;
 }

 .quiz-navigation {
     display: flex;
     justify-content: space-between;
     margin-top: 30px;
 }

 .btn {
     padding: 10px 20px;
     border: none;
     border-radius: 5px;
     cursor: pointer;
     font-weight: 500;
     transition: all 0.3s;
 }

 .btn-primary {
     background: #007bff;
     color: white;
 }

 .btn-primary:hover {
     background: #0056b3;
 }

 .btn-outline {
     background: transparent;
     border: 1px solid #007bff;
     color: #007bff;
 }

 .btn-outline:hover {
     background: #f8f9fa;
 }