.html-block {
    height: 100%;
    overflow: hidden;
}

.body-block {
    height: calc(100% - 16px);
    margin: 0px;
    padding: 8px;
}

.body-block-background {
    background-color: #3ecb92;
}

.main-block {
    background-color: #212121;
    height: 70%;
    margin: 0px;
    padding: 0px;
    border-radius: 8px;
    text-align: -webkit-center;
    border: 3px solid rgb(0, 0, 0);
}

.frame-block {
    text-align: start;
    height: calc(100% - 15px);
    overflow: hidden;
    border-top-left-radius: 5px;
    border-top-right-radius: 5px;
}

.frame-block>iframe {
    width: 100%;
    height: 100%;
    border: none;
}

.fixed_btn {
    height: 15px;
    width: 100%;
    padding: 0px;
    border: none;
    margin: 0px;
    border-bottom-left-radius: 5px;
    border-bottom-right-radius: 5px;
    background-color: #616161;
    vertical-align: top;
    cursor: pointer;
}

.fixed_btn_img {
    width: 30px;
    height: 30px;
    margin-top: -8px;
}