body
{
   background-color: #FFFFFF;
   color: #000000;
   font-family: Arial;
   font-weight: normal;
   font-size: 16px;
   line-height: 1.1875;
   margin: 0;
   padding: 0;
}
html,
body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.iframe-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
}

#preview-iframe {
    width: 100%;
    height: 100%;
    border: none;
    display: block;
}