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

#panorama {
    position: absolute;
    top: 0%;
    left: 0%;
    z-index: 10;
    height: 100%;
    width: 100%;
    display: block;
}

#div-firstBird {
    position: absolute;
    /* top: 30%; */
    /* left: 50%; */
    /* height: 40px; */
    /* width: 40px; */
    z-index: 10;
    display: block;
    /* border: 2px solid #02c43c; */
}

#firstBirdRange {
    font-size: 1em;
    position: absolute;
    top: 40px;
    right: 200px;
    border: 5px outset #5B8BE3;
    text-align: center;
    color: blue;
    padding-left: 15px;
    padding-right: 15px;
    padding-top: 8px;
    padding-bottom: 8px;
    display: block;
    z-index: 999;
}

#button-birdCall {
    position: absolute;
    top: 70px;
    right: 20px;
    height: 50px;
    width: 50px;
    border: none;
    display: block;
    z-index: 15;
}