body {
            font-family: 'Arial', sans-serif;
            line-height: 1.6;
            color: #333333;
            max-width: 600px;
            margin: 0 auto;
            padding: 0;
            background-color: #f5f5f5;
        }
        .container {
            background-color: #ffffff;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        .header {
            background-color: #C0C0C0;
            padding: 30px 20px;
            text-align: center;
            color: white;
        }
        .logo {
            max-width: 200px;
            height: auto;
            margin-bottom: 15px;
        }
        .content {
            padding: 25px;
        }
        .footer {
            background-color: #f8f8f8;
            padding: 20px;
            text-align: center;
            font-size: 14px;
            color: #777777;
        }
        h1 {
            color: #2c3e50;
            font-size: 24px;
            margin-top: 0;
        }
        h3 {
            color: #3498db;
            margin-top: 0;
        }
        ul {
            padding-left: 0;
            list-style-type: none;
        }
        li {
            margin-bottom: 15px;
            padding-left: 30px;
            position: relative;
        }
        .highlight {
            background-color: #f0f7fd;
            padding: 20px;
            border-left: 4px solid #3498db;
            margin: 25px 0;
            border-radius: 0 4px 4px 0;
        }
        .signature {
            margin-top: 30px;
            border-top: 1px solid #eeeeee;
            padding-top: 20px;
        }
        .icon {
            position: absolute;
            left: 0;
            top: 2px;
            color: #3498db;
            font-size: 18px;
        }
        .security-badge {
            text-align: center;
            margin: 20px 0;
        }
        .badge-icon {
            font-size: 40px;
            color: #2c3e50;
            margin: 10px;
        }