.progressbar {
    touch-action: none;
    vertical-align: middle;
    text-align: center;

    align-items: center;
    cursor: default;

    position: absolute;
    display: flex;
    justify-content: flex-start;
    bottom: 2px;
    width: 99%;
    height: 30px;
    background-color: gray;

    &.done {
        top: 0px;
        width: 0px;
        height: 5px;
        background-color: red;
        z-index: 2;
    }

    &.mark {
        top: 0px;
        background-color: transparent;
        border-right: 2px solid white;
        z-index: 3;
        pointer-events: none;
    }
}

.progressbar-disabled {
    cursor: not-allowed;
}

.progressbar-dragging {
    cursor: grabbing;
}

// citation: https://codepen.io/_Master_/pen/PRdjmQ
@keyframes blinker {
    from {
        opacity: 1;
    }
    to {
        opacity: 0;
    }
}
.blink {
    text-decoration: blink;
    animation-name: blinker;
    animation-duration: 0.6s;
    animation-iteration-count: infinite;
    animation-timing-function: ease-in-out;
    animation-direction: alternate;
}

.segment {
    border: 3px solid black;
    background-color: red;
    margin: 1px;
    padding: 0px;
    cursor: pointer;
    transition-duration: 0.5s;
    user-select: none;

    vertical-align: middle;
    text-align: center;
}

.segment-expanding {
    border-color: red;
    background-color: white;
    transition-duration: 0s;
    opacity: 0.75;
    pointer-events: none;
}

.segment-expanding:hover {
    background-color: inherit;
    cursor: not-allowed;
}

.segment-disabled {
    pointer-events: none;
    opacity: 0.5;
    transition-duration: 0s;
    /* Hide the text. */
    text-indent: 100%;
    white-space: nowrap;
    overflow: hidden;
}

.segment-hide {
    background-color: inherit;
    text-align: center;
    vertical-align: middle;
    user-select: none;
}

.segment:first-child {
    margin-left: 2px;
}
.segment:last-child {
    margin-right: 2px;
}

.segment:hover {
    background-color: white;
}

.segment:hover,
.segment-selected {
    margin: 0px;
    border: 4px solid red;
    border-radius: 2px;
}

.segment-selected {
    border: 4px solid #202020;
    background-color: red;
    opacity: 0.75;
    cursor: grabbing;
}