.helpScreen {
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    background-color: rgba(0, 0, 0, 0);
    z-index: 1000;
}
.helpScreenClose {
    position: absolute;
    right: 10px;
    top: 10px;
    opacity: 0;
    transition: opacity 0.5s ease 0.5s;
}
.helpScreenBackdrop {
    z-index: 999;
    position: fixed;
    opacity: 0;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    transition: opacity 0.5s ease;
}
.helpScreenMask {
    fill: #000000;
    /* fill: red; */
    fill-opacity: 0.9;
}
.helpScreenClose.visible,
.helpScreenBackdrop.visible {
    opacity: 1;
}
.helpScreenHeader {
    font-weight: bold;
    font-size: 1.5em;
}