ol.toc,
ol.toc ol
{
    counter-reset: item;
    padding-left: 5px;
}

ol.toc li
{
    display: block;
}

ol.toc li:before
{
    content: counters(item, ".") ". ";
    counter-increment: item;
}

ol.toc ol
{
    padding-left: 10px;
}

.topic ol .badge
{
    cursor: default;
}

.topic video
{
    width: 100%;
    height: auto;
}

.topic video,
.topic .embed-responsive
{
    margin-bottom: 10px;
}

.topic .embed-responsive + .bg-warning:has(blockquote),
.topic p:has(> .embed-responsive) + .bg-warning:has(blockquote)
{
    position: relative;
    top: 10px;
}

.topic img.img-thumbnail:not(.nogalery,.slideshow)
{
    cursor: zoom-in;
}

.topic .bg-warning:has(blockquote)
{
    border-top-right-radius: 5px;
    border-bottom-right-radius: 5px;
    box-shadow: rgba(0, 0, 0, 0.1) 0px 0.3px 0.9px, rgba(0, 0, 0, 0.13) 0px 1.6px 3.6px;
}

.topic blockquote
{
    font-size: 10pt;
    margin-top: 25px;
    border-left-color: goldenrod;
    padding-left: 10px;
}

.topic .pdd-qa-extra
{
    background-image: linear-gradient(106.79deg, rgb(239, 248, 255) 7.25%, rgb(225, 241, 255) 92.37%);
    padding: 10px 10px 5px 10px;
    border-top-right-radius: 5px;
    border-bottom-right-radius: 5px;
    margin-bottom: 10px;
    margin-top: 30px;
    box-shadow: rgba(0, 0, 0, 0.1) 0px 0.3px 0.9px, rgba(0, 0, 0, 0.13) 0px 1.6px 3.6px;
    border-left: 5px solid #6489AA;
}

.topic .pdd-qa-extra h2
{
    font-size: 18px;
    text-align: center;
}

.topic .pdd-qa-extra h2 .glyphicon-question-sign
{
    margin-right: 5px;
    font-size: 150%;
    vertical-align: bottom;
}

.topic .pdd-qa-extra.img-answers .list-group
{
    box-shadow: none;
    text-align: center;
}

.topic .pdd-qa-extra.img-answers .list-group-item
{
    border-radius: 4px;
    padding: 1.5%;
    box-shadow: rgba(0, 0, 0, 0.1) 0px 0.3px 0.9px, rgba(0, 0, 0, 0.13) 0px 1.6px 3.6px;
}


.topic .pdd-qa-extra.img-answers button
{
    width: 47%;
    display: inline-block;
    margin: 5px;
    -webkit-transition: -webkit-transform .2s ease, opacity .4s;
    transition: transform .2s ease, opacity .4s;
}


.topic .pdd-qa-extra.img-answers button:not(.list-group-item-success,.list-group-item-danger):hover
{
    -webkit-transform: translateY(-2px);
    transform: translateY(-2px);
}

.topic .pdd-qa-extra.img-answers button img
{
    width: 100%;
    height: auto;
}

.topic .pdd-qa-extra.img-answers .list-group-item-danger:not(.mark)
{
    animation: danferflash 0.3s alternate 13;
}

@keyframes danferflash
{
    from
    {
        background-color: #F2DEDE;
    }

    to
    {
        background-color: lightcoral;
    }
}

.topic .pdd-qa-extra.img-answers .list-group-item-success:not(.mark)
{
    animation: successflash 0.3s alternate 13;
}

@keyframes successflash
{
    from
    {
        background-color: #DFF0D8;
    }

    to
    {
        background-color: seagreen;
    }
}

.topic .pdd-qa-extra.img-answers .list-group-item-danger img
{
    filter: sepia(60%);
}

.topic .pdd-qa-extra.img-answers .list-group-item-success img
{
    filter: contrast(150%);
}

.topic .pdd-qa-extra.img-answers .list-group-item-success.mark:before,
.topic .pdd-qa-extra.img-answers .list-group-item-danger.mark:before
{
    display: inline-block;
    position: absolute;
    top: calc(50% - 4vw);
    left: calc(50% - 3vw);
    z-index: 1;
    font-size: 6vw;
    font-family: "Glyphicons Halflings";
    opacity: 0.7;
    animation-iteration-count: 1;
    animation-duration: 0.4s;
    animation-name: transform;
    transform-origin: center;
}

.topic .pdd-qa-extra.img-answers .list-group[data-rel="0"]:after
{
    background-color: #F2DEDE;
}

.topic .pdd-qa-extra.img-answers .list-group[data-rel="1"]:after
{
    background-color: #DFF0D8;
}

.topic .pdd-qa-extra.img-answers .list-group:after
{
    content: attr(data-title);
    display: table;
    text-align: left;
    margin: 10px auto 0 auto;
    color: gray;
    opacity: 1;
    padding-left: 7px;
    padding-right: 7px;
    border-radius: 4px;
}

@media screen and (max-width: 768px)
{
    .topic .pdd-qa-extra.img-answers button
    {
        width: 45%;
    }

    .topic .pdd-qa-extra.img-answers .list-group-item-success.mark:before,
    .topic .pdd-qa-extra.img-answers .list-group-item-danger.mark:before
    {
        top: calc(50% - 30pt);
        left: calc(50% - 20pt);
        font-size: 40pt;
    }
}

.topic .pdd-qa-extra.img-answers .list-group-item-success.mark:before
{
    content: "\e089";
    color: forestgreen;
}

.topic .pdd-qa-extra.img-answers .list-group-item-danger.mark:before
{
    content: "\e088";
    color: tomato;
}

@keyframes transform
{
    from
    {
        transform: scale(.1);
    }

    to
    {
        transform: scale(1);
    }
}

.topic .pdd-qa-extra:before,
.topic blockquote:before
{
    content: 'Для преподавателя';
    font-weight: bold;
    font-size: 80%;
    margin: -25px 0 5px -5px;
    display: list-item;
    list-style-type: disclosure-open;
    color: goldenrod;
}

.topic .pdd-qa-extra:before
{
    content: 'Интерактивный вопрос';
    color: #6489AA;
}

@media screen and (-ms-high-contrast: active), (-ms-high-contrast: none)
{
    .topic blockquote:before
    {
        display: block;
    }
}