html,
    body {
        height: 100%;
    }

    body {
        font-family: Arial, sans-serif;
        margin: 0px;
        padding: 0px;
    }

    .result {
        padding: 10px;
        margin-top: 20px;
        border: 1px solid #ccc;
        border-radius: 5px;
        background: #f9f9f9;
    }

    iframe {
        width: 100%;
        height: calc(100% - 55px);
        border: none;
    }

    .header {
        height: calc(55px - 18px);
        background: linear-gradient(231deg, #0a5a9f, #2da0ff, #14cfa9);
        text-align: center;
        color: #fff;
        padding-top: 18px;
    }