* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #f5f5f5;
        }

        #conteneur {
            max-width: 1200px;
            margin: 0 auto;
            background-color: #fff;
            box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
        }

        #masthead {
            background: linear-gradient(135deg, #8b0000 0%, #a52a2a 100%);
            padding: 30px 40px;
            color: #fff;
            text-align: center;
        }

        #masthead h1 {
            font-size: 2.5em;
            font-weight: 300;
            letter-spacing: 2px;
            margin: 0;
        }

        main {
            padding: 50px 40px;
        }

        article {
            margin-bottom: 50px;
        }

        article h2 {
            color: #8b0000;
            font-size: 2em;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid #ddd;
        }

        article h3 {
            color: #a52a2a;
            font-size: 1.5em;
            margin-top: 30px;
            margin-bottom: 15px;
        }

        article h4 {
            color: #666;
            font-size: 1.2em;
            margin-top: 25px;
            margin-bottom: 12px;
        }

        article p {
            margin-bottom: 20px;
            text-align: justify;
            color: #444;
        }

        .transition-section {
            background-color: #f9f9f9;
            padding: 40px;
            margin: 40px 0;
            border-left: 4px solid #8b0000;
        }

        .transition-section p {
            margin-bottom: 15px;
            color: #555;
        }

        .links-section {
            background: linear-gradient(to bottom, #fff 0%, #f5f5f5 100%);
            padding: 50px 40px;
            margin-top: 40px;
        }

        .links-section h3 {
            color: #8b0000;
            font-size: 1.8em;
            margin-bottom: 25px;
            margin-top: 35px;
            padding-bottom: 10px;
            border-bottom: 2px solid #ddd;
        }

        .links-section h3:first-child {
            margin-top: 0;
        }

        .links-section ul {
            list-style: none;
            column-count: 2;
            column-gap: 40px;
            margin-bottom: 30px;
        }

        .links-section li {
            margin-bottom: 12px;
            break-inside: avoid;
        }

        .links-section a {
            color: #333;
            text-decoration: none;
            display: inline-block;
            padding: 8px 0;
            transition: all 0.3s ease;
            position: relative;
            padding-left: 20px;
        }

        .links-section a:before {
            content: "→";
            position: absolute;
            left: 0;
            color: #8b0000;
            transition: all 0.3s ease;
        }

        .links-section a:hover {
            color: #8b0000;
            padding-left: 25px;
        }

        .links-section a:hover:before {
            left: 5px;
        }

        #footnote {
            background-color: #2c2c2c;
            color: #fff;
            padding: 25px 40px;
            text-align: center;
            font-size: 0.9em;
        }

        @media (max-width: 768px) {
            #masthead {
                padding: 20px;
            }

            #masthead h1 {
                font-size: 1.8em;
                letter-spacing: 1px;
            }

            main {
                padding: 30px 20px;
            }

            article h2 {
                font-size: 1.6em;
            }

            article h3 {
                font-size: 1.3em;
            }

            article p {
                text-align: left;
            }

            .transition-section {
                padding: 25px 20px;
                margin: 30px 0;
            }

            .links-section {
                padding: 30px 20px;
            }

            .links-section ul {
                column-count: 1;
                column-gap: 0;
            }

            .links-section h3 {
                font-size: 1.4em;
                margin-top: 25px;
            }

            #footnote {
                padding: 20px;
            }
        }

        @media (max-width: 480px) {
            #masthead h1 {
                font-size: 1.5em;
            }

            article h2 {
                font-size: 1.4em;
            }

            article h3 {
                font-size: 1.2em;
            }

            .links-section h3 {
                font-size: 1.2em;
            }
        }