body {
    padding: 0px;
    margin: 0px;
    overflow: hidden;
    font-family: Bahnschrift, Arial, Helvetica, sans-serif;
}

#content {
    position: absolute;
    width: 1920px;
    height: 940px;
    background-color: rgba(255,0,0,0.2);
    transform-origin: left top;
}

#flieger {
    width: 200px;
    right: 20px;
    position: absolute;
    transform: rotateZ(-15deg);
    top: 20px;
}

#runway {
    position: absolute;
    top: 50px;
    width: 1800px;
    left: 60px;
}

.source {
    position: relative;
    left: 100px;
    top: 700px;
    width: 250px;
    height: 60px;
    line-height: 60px;
    background-color: steelblue;
    border-radius: 15px;
    border: 4px solid #24527f;
    text-align: center;
    font-size: 30px;
    cursor: pointer;
    user-select: none;
}