body {
     font-family: 'Segoe UI', sans-serif;
     background: #f7fafc;
     color: #333;
     text-align: center;
     margin: 0;
     padding: 0;
     padding-bottom: 80px;
 }

 h1 {
     background-color: #2e86c1;
     color: white;
     padding: 1rem;
     margin: 0;
     margin-bottom: 10px;
 }

 .boite {
     margin-top: 10px auto;
     font-weight: bold;
     margin: 10px auto;
     padding: 1rem;
     max-width: 600px;
     background: white;
     border-radius: 8px;
     box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
 }

 canvas {
     max-width: 100%;
     height: auto;
     display: block;
     margin: 0 auto;
 }

 nav button {
     margin: 0.5rem;
     padding: 0.5rem 1rem;
     border: none;
     background: rgb(199, 196, 196);
     color: #0a74da;
     border-radius: 5px;
     cursor: pointer;
 }

 nav button:hover {
     background: #eee;
 }

 main {
     flex: 1;
     padding: 1rem;
     display: flex;
     flex-direction: column;
     align-items: center;
 }

 .screen {
     display: none;
     text-align: center;
 }

 .screen.active {
     display: block;
 }

 canvas {
     border: 1px solid #333;
     margin-bottom: 1rem;
 }

 label {
     display: block;
     margin: 1rem 0;
 }

 .quiz {
     margin-top: 20px;
     text-align: center;
 }

 .question-box {
     font-size: 18px;
     margin-bottom: 15px;
 }

 .feedback {
     font-weight: bold;
     margin-top: 10px;
     min-height: 20px;
 }

 .feedback.correct {
     color: green;
 }

 .feedback.wrong {
     color: red;
 }

 .score {
     margin-top: 20px;
     font-size: 16px;

     colo .screen {
         display: none;
     }

     .screen.active {
         display: block;
     }

     #modules-container {
         margin-top: 20px;
     }

     r: #333;
 }