[bm-before],
[bm-after] {
    position: relative;
}

[bm-before]:before {
    content: attr(bm-before);
    position: absolute;
    font-size: 12px;
    top: -30px;
    left: -20px;
    border-bottom: 1px solid red;
}

[bm-after]:after {
    content: attr(bm-after);
    position: absolute;
    font-size: 12px;
    bottom: -30px;
    left: -20px;
    border-bottom: 1px solid red;
}

.scroll-indicators {
    position: fixed;
    top: calc(50% - 20px);
    right: 0;
    cursor: pointer;

    &:before {
        content: '';
        border-bottom: 1px solid red;
        position: fixed;
        left: 0;
        right: 0;
        padding: 0 0 13px 0;
        opacity: 0.2;
    }

    &__count {
        background: #000;
        color: #fff;
        font-size: 12px;
        line-height: normal;
        border-radius: 2px;
        padding: 2px 7px;
        box-shadow: 0px 0px 1px 1px #ffffff2b;
        display: inline-block;
        z-index: 999;
        position: relative;
    }

    &.show-line + .show-line:before,
    &.show-line:before {
        opacity: 1;
    }

    &--0 { top: calc(0% - 20px); }
    &--10 { top: calc(10% - 20px); }
    &--20 { top: calc(20% - 20px); }
    &--30 { top: calc(30% - 20px); }
    &--40 { top: calc(40% - 20px); }
    &--50 { top: calc(50% - 20px); }
    &--60 { top: calc(60% - 20px); }
    &--70 { top: calc(70% - 20px); }
    &--80 { top: calc(80% - 20px); }
    &--90 { top: calc(90% - 20px); }
    &--100 { top: calc(100% - 20px); }
}