html, body {
            height: 100%;
            margin: 0;
            font-family: Arial, sans-serif;
            background-color: #f4f4f9;
        }

        body.calculateur {
            background-color: #f4f4f9;
        }

        .calculateur-container {
            max-width: 600px;
            margin: 20px auto;
            background: #fff;
            padding: 20px;
            border-radius: 8px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        }

        h1.calculateur-title {
            text-align: center;
            color: #333;
            font-size: 1.8em;
        }

        label {
            font-weight: bold;
            display: block;
            margin: 10px 0 5px;
        }

        input, select, button {
            width: 100%;
            padding: 10px;
            margin-bottom: 15px;
            border: 1px solid #ccc;
            border-radius: 4px;
            font-size: 1em;
        }

        button {
            background-color: #007BFF;
            color: white;
            border: none;
            cursor: pointer;
        }

        button:hover {
            background-color: #0056b3;
        }

        .resultat {
            margin-top: 20px;
            font-size: 1.2em;
            color: #333;
        }

        .info-section {
            background: #f0f0f5;
            padding: 15px;
            margin-top: 20px;
            border-left: 4px solid #007BFF;
        }

        .info-section h2 {
            margin-top: 0;
            font-size: 1.2em;
            color: #333;
        }

        .chart-container {
            margin-top: 30px;
        }

        @media (max-width: 768px) {
            .calculateur-container {
                margin: 10px;
                padding: 15px;
            }

            h1.calculateur-title {
                font-size: 1.5em;
            }

            input, select, button {
                font-size: 0.9em;
            }

            .info-section {
                padding: 10px;
            }
        }