    <style>
        html, body {
            margin: 0;
            height: 100%;
            overflow: hidden;
        }
        .navbar {
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 1;
            background-color: #fff;
        }
        .content-container {
            position: absolute;
            top: 75px; /* Adjust this value to the height of your navbar */
            left: 0;
            width: 100%;
            height: calc(100% - 75px); /* Adjust this value to the height of your navbar */
            overflow: hidden;
        }
        .iframe-container {
            width: 100%;
            height: 100%;
        }
        .iframe-container iframe {
            width: 100%;
            height: 100%;
            border: 0;
        }
    </style>