html,
body {
    margin: 0;
    padding: 0;
    height: 100%;
    overflow: hidden;
}

.wrapper {
    position: relative;
    width: 100dvw;
    height: 100dvh;
}

iframe {
    width: 100dvw;
    height: 100dvh;
    border: none;
}

.layer {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 170px;
    height: 40px;
    border-radius: 10px;
    background-color: #dbdbdb;
    color: #fff;
    font-family: Arial, Helvetica, sans-serif;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
}

h4 {
    font-size: 14px;
    padding: 0;
    margin: 0;
}

h4>span {
    color: #000000;
}


@media only screen and (min-width: 765px) {
    .layer {
        position: absolute;
        width: 170px;
        height: 40px;
    }
}

@media only screen and (max-width: 767px) {
    .layer {
        position: absolute;
        width: 40px;
        height: 40px;
    }

    h4>span {
        display: none;
    }

}