body {
    font-family: Arial, sans-serif;
    padding: 20px;
    background-color: #f4f4f4;
  }
  
  section {
    margin-bottom: 40px;
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  }
  
  input, button {
    margin: 5px;
    padding: 10px;
    font-size: 16px;
  }
  
  .resultat {
    margin-top: 10px;
    font-weight: bold;
  }
  
  #nombres-premiers-liste {
    background-color: #f1f1f1;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  }
  
  #nombres-premiers-resultat {
    margin-top: 10px;
    font-weight: bold;
    color: #2d6a4f;
  }
  #gestion-tableau {
    background-color: #eaf1f1;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    margin-top: 40px;
  }
  
  #tableau-list {
    list-style-type: none;
    padding: 0;
  }
  
  #tableau-list li {
    background-color: #fff;
    padding: 5px;
    margin-bottom: 5px;
    border-radius: 5px;
    box-shadow: 0 1px 5px rgba(0, 0, 0, 0.1);
  }