body {
    margin: 0;
    padding: 0;
}

iframe {
    display: block;
    width: 100vw;
    height: 100vh;
    max-width: 100%;
    margin: 0;
    padding: 0;
    border: 0 none;
    box-sizing: border-box;
}

input:focus, textarea:focus, select:focus{
    outline: none;
}