.qm-scroll-down-indicator-wrapper {
    display: flex;
    justify-content: center;
}

.qm-scroll-down-indicator {
    position: relative;
    display: block;
    height: 100%;
    width: 1px;
    background-color: rgb(255,255,255,0.8);

    overflow: hidden;
    opacity: 1;

    -webkit-transition: opacity 0.6s ease-in-out;
    -moz-transition: opacity 0.6s ease-in-out;
    -o-transition: opacity 0.6s ease-in-out;
    transition: opacity 0.6s ease-in-out;
}

.qm-scroll-down-indicator.qm-scroll-down-indicator-hide {
    opacity: 0;
}

.qm-scroll-down-indicator-bar {
    position: absolute;

    height: 100%;
    width: 100%;
    background-color: rgb(0,0,0,0.6);
}

.qm-scroll-down-indicator-animate .qm-scroll-down-indicator-bar {
    -webkit-transition: bottom 1.0s linear;
    -moz-transition: bottom 1.0s linear;
    -o-transition: bottom 1.0s linear;
    transition: bottom 1.0s linear;
}

.qm-scroll-down-indicator-bar-top {
    bottom: 180%;
}

.qm-scroll-down-indicator-bar-bottom {
    bottom: 0%;
}

.qm-scroll-down-indicator-play .qm-scroll-down-indicator-bar-top {
    bottom: 0%;
}

.qm-scroll-down-indicator-play .qm-scroll-down-indicator-bar-bottom {
    bottom: -180%;
}