.lecture-section {
    --lecture-sidebar-bg: transparent;
    --lecture-sidebar-fg: #000000;
    --lecture-right-inset: 0.5ch;
    margin-top: 0;
}

.lecture-layout {
    display: grid;
    grid-template-columns: 280px minmax(0, 1fr);
    gap: 10px;
    align-items: stretch;
    position: relative;
}

@media (min-width: 901px) {
    .lecture-layout::before {
        content: "";
        position: absolute;
        top: calc(var(--nav-box-height) + var(--nav-border-bottom-thk) - var(--main-padding-top));
        bottom: 0;
        left: calc(280px + 5px);
        width: 1px;
        background: #000000;
        pointer-events: none;
    }
}

.lecture-sidebar {
    box-sizing: border-box;
    align-self: stretch;
    margin-top: calc(var(--nav-box-height) + var(--nav-border-bottom-thk) - var(--main-padding-top));
    margin-left: calc(-1 * var(--main-padding-left));
    min-height: 100%;
    padding: var(--box-content-padding);
    background: var(--lecture-sidebar-bg);
    color: var(--lecture-sidebar-fg);
}

.lecture-category-block + .lecture-category-block {
    margin-top: 4px;
}

.lecture-category-btn {
    width: 100%;
    display: block;
    text-align: left;
    border: 0;
    padding: 2px 0;
    background: transparent;
    color: var(--lecture-sidebar-fg);
    cursor: pointer;
    font-size: var(--nav-font-size);
    line-height: 1.4;
    font-weight: 400;
}

.lecture-category-btn:hover {
    color: var(--lecture-sidebar-fg);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.lecture-category-btn.is-open {
    text-decoration: none;
    font-weight: 700;
}

.lecture-course-list-wrap {
    display: none;
    margin-left: 2px;
    padding-top: 2px;
    padding-bottom: 0;
}

.lecture-course-list-wrap.is-open {
    display: block;
}

.lecture-course-list {
    list-style: none;
    margin: 0;
    padding: 0 0 0 16px;
    border-left: 1px solid var(--lecture-sidebar-fg);
}

.lecture-course-item {
    margin: 0;
    padding: 1px 0;
}

.lecture-course-btn {
    width: 100%;
    display: grid;
    grid-template-columns: max-content minmax(0, 1fr);
    column-gap: 0.6ch;
    align-items: start;
    text-align: left;
    border: 0;
    background: transparent;
    color: var(--lecture-sidebar-fg);
    padding: 3px 0;
    cursor: pointer;
    font-size: var(--nav-font-size);
    line-height: 1.4;
    font-weight: 400;
}

.lecture-course-btn:hover {
    color: var(--lecture-sidebar-fg);
    text-decoration: underline;
}

.lecture-course-btn.is-active {
    font-weight: 700;
}

.lecture-course-code {
    white-space: nowrap;
}

.lecture-course-name {
    min-width: 0;
    white-space: normal;
    word-break: normal;
    overflow-wrap: break-word;
}

.lecture-detail-column {
    border-left: 0;
    padding-left: 10px;
    padding-right: calc(10px + var(--lecture-right-inset));
    box-sizing: border-box;
    min-height: 320px;
}

.lecture-detail-panel {
    display: none;
}

.lecture-detail-panel.is-active {
    display: block;
}

.lecture-detail-panel h5 {
    margin: 0 0 8px 0;
    font-size: var(--main-font-size);
    font-weight: 700;
    line-height: 1.4;
}

.lecture-meta-list {
    margin: 0 0 10px 0;
    width: calc(100% + var(--main-padding-right) + 10px - var(--lecture-right-inset));
    margin-right: calc(-1 * (var(--main-padding-right) + 10px - var(--lecture-right-inset)));
    border-top: 1px solid #000000;
    border-bottom: 1px solid #000000;
}

.lecture-meta-row {
    display: grid;
    grid-template-columns: 132px minmax(0, 1fr);
    column-gap: 10px;
    align-items: start;
    padding: 5px 0;
    border-top: 1px solid #000000;
}

.lecture-meta-row:first-child {
    border-top: 0;
}

.lecture-meta-row-soft {
    border-top: 1px dotted #a0a0a0;
}

.lecture-overview-row {
    grid-template-columns: 1fr;
    row-gap: 4px;
}

.lecture-meta-label,
.lecture-meta-value {
    margin: 0;
    font-size: var(--nav-font-size);
    line-height: 1.4;
}

.lecture-overview-value {
    padding-left: 12px;
}

.lecture-outline-paragraph {
    margin: 0;
    line-height: 1.4;
}

.lecture-outline-paragraph + .lecture-outline-paragraph {
    margin-top: 2px;
}

.lecture-outline-heading {
    margin: 0;
    line-height: 1.4;
}

.lecture-outline-break {
    display: none;
    height: 0;
}

.lecture-outline-list {
    margin: 0;
    padding: 0 0 0 18px;
    list-style: none;
}

.lecture-outline-list li {
    position: relative;
    margin: 0;
    line-height: 1.4;
}

.lecture-outline-list li + li {
    margin-top: 1px;
}

.lecture-outline-list li::before {
    content: "-";
    position: absolute;
    left: -12px;
}

.lecture-detail-panel h6 {
    margin: 0 0 4px 0;
    font-size: var(--nav-font-size);
    font-weight: 700;
    line-height: 1.4;
}

.lecture-syllabus-wrap {
    width: calc(100% + var(--main-padding-right) + 10px - var(--lecture-right-inset));
    margin-right: calc(-1 * (var(--main-padding-right) + 10px - var(--lecture-right-inset)));
    overflow-x: auto;
}

.lecture-syllabus-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--nav-font-size);
    line-height: 1.4;
}

.lecture-syllabus-table th,
.lecture-syllabus-table td {
    border-top: 0;
    text-align: left;
    vertical-align: top;
    padding: 3px 0;
}

.lecture-syllabus-table thead th {
    border-top: 1px dotted #a0a0a0;
    border-bottom: 1px dotted #a0a0a0;
}

.lecture-syllabus-table tbody td {
    border-top: 1px dotted #a0a0a0;
}

.lecture-syllabus-table tbody tr:last-child td {
    padding-bottom: 10px;
}

.lecture-syllabus-table th:first-child,
.lecture-syllabus-table td:first-child {
    width: 52px;
    padding-right: 10px;
}

.lecture-syllabus-table th {
    font-weight: 700;
}

.lecture-empty {
    margin: 0;
    padding: 8px 0;
    font-size: var(--nav-font-size);
}

@media (max-width: 900px) {
    .lecture-layout {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .lecture-sidebar {
        margin-right: calc(-1 * var(--main-padding-right));
        padding: var(--box-content-padding);
        min-height: auto;
        align-self: auto;
        background: transparent;
        color: #000000;
        border-bottom: 1px solid #000000;
    }

    .lecture-detail-column {
        border-left: 0;
        border-top: 0;
        padding-left: 10px;
        padding-right: calc(10px + var(--lecture-right-inset));
        padding-top: 10px;
        min-height: 0;
    }

    .lecture-course-btn {
        grid-template-columns: max-content minmax(0, 1fr);
    }

    .lecture-meta-row {
        grid-template-columns: 112px minmax(0, 1fr);
    }

    .lecture-overview-row {
        grid-template-columns: 1fr;
    }
}