.popover{
    width: 276px;
    max-width: 276px;
    background-color: #ffffff;
    padding: 1px;
    font-family: Roboto,'Open Sans',sans-serif;
    font-style: normal;
    font-weight: 400;
    letter-spacing: normal;
    line-break: auto;
    line-height: 1.42857143;
    text-align: left;
    text-align: start;
    text-decoration: none;
    text-shadow: none;
    text-transform: none;
    white-space: normal;
    word-break: normal;
    word-spacing: normal;
    word-wrap: normal;
    font-size: 14px;
    background-color: #fff;
    background-clip: padding-box;
    border: 1px solid #ccc;
    border: 1px solid rgba(0,0,0,.2);
    border-radius: 6px;
    -webkit-box-shadow: 0 5px 10px rgba(0,0,0,.2);
    box-shadow: 0 5px 10px rgba(0,0,0,.2);
    z-index: 100;
}

.popover .arrow,
.popover .arrow:after {
    position: absolute;
    display: block;
    width: 0;
    height: 0;
    border-color: transparent;
    border-style: solid;
}
.popover .arrow {
    border-width: 11px;
}
.popover .arrow:after {
    content: "";
    border-width: 10px;
}


.popover[x-placement=top] .arrow {
    bottom: -11px;
    left: 50%;
    margin-left: -11px;
    border-top-color: #999;
    border-top-color: rgba(0, 0, 0, .25);
    border-bottom-width: 0;
}
.popover[x-placement=top] .arrow:after {
    bottom: 1px;
    margin-left: -10px;
    content: " ";
    border-top-color: #fff;
    border-bottom-width: 0;
}
.popover[x-placement=right] .arrow {
    top: 50%;
    left: -11px;
    margin-top: -11px;
    border-right-color: #999;
    border-right-color: rgba(0, 0, 0, .25);
    border-left-width: 0;
}
.popover[x-placement=right] .arrow:after {
    bottom: -10px;
    left: 1px;
    content: " ";
    border-right-color: #fff;
    border-left-width: 0;
}
.popover[x-placement=bottom] .arrow {
    top: -11px;
    left: 50%;
    margin-left: -11px;
    border-top-width: 0;
    border-bottom-color: #999;
    border-bottom-color: rgba(0, 0, 0, .25);
}
.popover[x-placement=bottom] .arrow:after {
    top: 1px;
    margin-left: -10px;
    content: " ";
    border-top-width: 0;
    border-bottom-color: #fff;
}
.popover[x-placement=left] .arrow {
    top: 50%;
    right: -11px;
    margin-top: -11px;
    border-right-width: 0;
    border-left-color: #999;
    border-left-color: rgba(0, 0, 0, .25);
}
.popover[x-placement=left] .arrow:after {
    right: 1px;
    bottom: -10px;
    content: " ";
    border-right-width: 0;
    border-left-color: #fff;
}

.popover-header {
    background-color: #f7f7f7;
    color: #2b343e;
    font-size: 14px;
    font-weight: 400;
    margin: 0;
    padding: 8px 14px;
    border-bottom: 1px solid #ebebeb;
    border-radius: 5px 5px 0 0;
}

.popover .popover-body {
    overflow-wrap: break-word;
    padding: 9px 14px;
}

.popover div.citation_content {
    overflow-wrap: break-word;
    font-size: 14px;
}

.popover h6 {
    font-weight: 400;
    font-size: 14px;
    margin-top: 5px;
}

.popover .flexbox {
    display: flex;
    flex-wrap: nowrap;
    justify-content: space-between;
    margin: 8px 0;
}

.popover .flexbox > div {
    width: 49%;
}

.popover .flexbox > div:nth-child(1) {
    text-align: left;
}

.popover .flexbox > div:nth-child(2) {
    text-align: right;
}

.popover .flexbox a {
    color: #6c7781;
    font-size: 13px;
}