body {
            font-family: Georgia, serif;
            max-width: 800px;
            margin: 0 auto;
            padding: 20px;
            background-color: #f5f5f5;
            color: #333;
        }

        .newsletter {
            position: relative;
            background-color: white;
            padding: 40px;
            border-radius: 8px;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
        }

        .site-logo {
            position: absolute;
            top: 16px;
            left: 16px;
            width: 50px;
            height: 50px;
        }

        .back-link {
            display: inline-block;
            margin: 0 0 24px 56px;
            padding: 8px 16px;
            background-color: #3498db;
            color: #fff;
            text-decoration: none;
            border-radius: 4px;
            font-weight: bold;
        }

        .back-link:hover {
            opacity: 0.92;
        }

        h1 {
            text-align: center;
            color: #2c3e50;
            border-bottom: 3px solid #3498db;
            padding-bottom: 10px;
        }

        .section {
            margin: 30px 0;
        }

        .section h2 {
            color: #3498db;
            border-left: 4px solid #3498db;
            padding-left: 10px;
        }

        .image-placeholder {
            width: 400px;
            height: auto;
            background-color: #ecf0f1;
            border: 2px dashed #bdc3c7;
            display: block;
            margin: auto;
            color: #95a5a6;
            font-size: 18px;
            border-radius: 4px;
        }

        .image-placeholder-wide {
            width: 720px;
            height: auto;
            background-color: #ecf0f1;
            border: 2px dashed #bdc3c7;
            display: block;
            margin: auto;
            color: #95a5a6;
            font-size: 18px;
            margin: 15px 0;
            border-radius: 4px;
        }

        p {
            line-height: 1.6;
            text-align: justify;
        }

        ul {
            line-height: 1.6;
            margin: 0 0 20px 20px;
            padding-left: 20px;
        }