#classroom-timeline .card {
    box-shadow: none;
    border: 1px solid rgba(0,0,0,.125);
}

#classroom-timeline .card-header {
    background-color: #fff;
    font-weight: bold;
}

#classroom-timeline .card-header button:focus {
    box-shadow: none;
    text-decoration: none;
}

.accordion>.card:not(:last-of-type) {
    border-bottom: 0 !important;
}

.sub-topics-icon {
    width: 40px;
    height: 40px;
    line-height: 40px;
    min-width: 40px;
    border-radius: 50%;
    text-align: center;
    background-color: #EEEEEE;
    margin-right: 1rem;
}

.sub-topics-icon.done {
    background-color: #007bff;
    color: #fff;
}

.sub-topics-block {
    position: relative;
    z-index: 1;
    padding-bottom: 1.5rem;
}

.sub-topics-block:last-child {
    padding-bottom: 0;
}

.sub-topics-progress-vertical-block {
    position: absolute;
    top: 0;
    bottom: 0;
    z-index: -1;
    width: 40px;
}

.sub-topics-progress-vertical-block .progress {
    height: 100%;
    width: 3px;
    border-radius: 0;
    margin: 0 auto;
}

.sub-topics-progress-vertical-block .progress .progress-bar {
    width: 100%;
}

.sub-topics-block .progress-circle {
    display: inline-block;
    width: 40px;
    height: 40px;
    line-height: 40px;
    min-width: 40px;
    margin: 0 1rem 0 0;
}

.sub-topics-block .progress-circle:after {
    border: 3px solid transparent;
    background-color: #EEEEEE;
}

.sub-topics-block .progress-circle.done:after {
    background-color: #007bff;
    color: #fff;
}

.sub-topics-block .progress-circle.active:after {
    background-color: #e6f2ff;
    color: #007bff;
}

.sub-topics-block .progress-circle.live:after {
    background-color: #dc3545;
    color: #fff;
}

.sub-topics-block .progress-circle.upcoming:after {
    background-color: #17a2b8;
    color: #fff;
}

.sub-topics-block .progress-circle .progress-bar {
    border-width: 3px;
}

.sub-topics-block .progress-circle .progress-value * {
    z-index: 1;
}

.sub-topics-block .progress-circle.done .progress-value {
    color: #fff;
}

.sub-topics-block .progress-circle.active .progress-value {
    color: #007bff;
}

.sub-topics-block .progress-circle.live .progress-value, .sub-topics-block .progress-circle.upcoming .progress-value {
    color: #fff;
}

.sub-topics-block .progress-circle.disabled .progress-value {
    color: #6c757d;
}

a.studied {
    color: inherit;
}

a.studied:hover {
    color: #0056b3;
}

a.studying:hover {
    color: #007bff;
    text-decoration: none;
    cursor: default;
}

a.disabled {
    color: #6c757d;
    pointer-events: none;
}

.badge-video-preview {
    font-size: .8rem;
}

.timeline-items {
    margin-bottom: 1.5rem;
}

.timeline-items:last-child {
    margin-bottom: 0 !important;
}

.studied {
    color: inherit;
}

.studied:hover {
    color: #0056b3;
}

.live.studied:hover, .live.studying, .live.studying:hover {
    color: #dc3545;
}

.upcoming.studied:hover, .upcoming.studying, .upcoming.studying:hover {
    color: #17a2b8;
}