/* Reset et base */
body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', sans-serif;
    background: #f4f4f9;
    color: #333;
    line-height: 1.6;
  }
  
  /* Conteneur principal */
  .container {
    max-width: 900px;
    margin: 50px auto;
    padding: 20px;
    background: white;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    border-radius: 10px;
  }
  
  /* En-tête */
  header {
    text-align: center;
    margin-bottom: 40px;
  }
  
  h1 {
    font-size: 2.2em;
    color: #2c3e50;
  }
  
  h2 {
    font-size: 1.2em;
    color: #7f8c8d;
    font-style: italic;
    margin-top: 0.2em;
    margin-bottom: 0.2em;
  }
  
  /* Titres de section */
  h3 {
    color: #2980b9;
    margin-top: 0.2em;
    margin-bottom: 0.2em;
  }
  
  /* Paragraphes */
  p {
    text-align: justify;
    margin: 10px 0 20px 0;
  }
  
  /* Responsive */
  @media (max-width: 600px) {
    .container {
      margin: 20px;
      padding: 15px;
    }
  
    h1 {
      font-size: 1.6em;
    }
  
    h2 {
      font-size: 1em;
    }
  
    h3 {
      font-size: 1.1em;
    }
  }