body, html {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    float: left;
}

#btnDiv {
    width: 40%;
    height: 50px;
    float: left;
    display: flex;
    align-items: center;
    justify-content: space-around;
    padding: 0 30%;
}

#ifrDiv {
    width: 100%;
    height: calc(100% - 90px);
    float: left;
}

#ifr {
    width: 100%;
    height: 100%;
    border: 0;
    float: left;
}

.btnSty {
    width: 80px;
    height: 30px;
    color: #bdb9b9;
    background-color: transparent;
    border: 1px solid #bdb9b9;
    border-radius: 2px;
    cursor: pointer;
}

.btnSelSty {
    color: #fff;
    background-color: #285990;
    border: 1px solid #88c6ff;
}