.tsuruse-event-sidebar {
    margin: 0;
    padding: 0;
    list-style: none;
}

.tsuruse-event-nav-widget {
    padding-top: 4px;
}

.tsuruse-event-sidebar-section + .tsuruse-event-sidebar-section {
    margin-top: 18px;
}

.tsuruse-event-sidebar-group {
    margin: 0;
}

.tsuruse-event-sidebar-group__summary {
    position: relative;
    display: block;
    cursor: pointer;
    list-style: none;
}

.tsuruse-event-sidebar-group__summary::-webkit-details-marker {
    display: none;
}

.tsuruse-event-sidebar-group__summary::after {
    content: "+";
    position: absolute;
    top: 2px;
    right: 0;
    color: #5b6f7e;
    font-size: 1.2rem;
    font-weight: 500;
    line-height: 1;
}

.tsuruse-event-sidebar-group[open] .tsuruse-event-sidebar-group__summary::after {
    content: "\2212";
}

.tsuruse-event-sidebar-section__title {
    margin: 0;
    padding: 0 40px 10px 0;
    border-bottom: 1px solid rgba(24, 48, 63, 0.12);
    color: #18303f;
    font-size: 1.2rem;
    line-height: 1.3;
    position: relative;
}

.tsuruse-event-sidebar-section__title::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -1px;
    width: 86px;
    border-bottom: 2px solid #8dc8d9;
}

.tsuruse-event-sidebar-group.has-current .tsuruse-event-sidebar-section__title {
    color: #0b5c75;
}

.tsuruse-event-sidebar-group.has-current .tsuruse-event-sidebar-section__title::after {
    border-bottom-color: #0b5c75;
}

.tsuruse-event-sidebar-nav {
    margin: 14px 0 0;
    padding: 0;
    list-style: none;
}

.tsuruse-event-sidebar-nav__item + .tsuruse-event-sidebar-nav__item {
    margin-top: 6px;
}

.tsuruse-event-sidebar-nav__link {
    display: block;
    padding: 12px 16px;
    border-radius: 16px;
    background: transparent;
    color: #18303f;
    font-size: 0.9rem;
    text-decoration: none;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.tsuruse-event-sidebar-nav__link:hover,
.tsuruse-event-sidebar-nav__link:focus {
    background: #eef9fd;
    color: #0b5c75;
}

.tsuruse-event-sidebar-nav__item.is-current .tsuruse-event-sidebar-nav__link {
    background: #d9f3fb;
    color: #0b5c75;
}

.tsuruse-event-sidebar-nav__name {
    font-weight: 700;
    line-height: 1.45;
}

@media (max-width: 767.98px) {
    .tsuruse-event-sidebar-section__title {
        font-size: 1.08rem;
    }
}

@media (min-width: 992px) {
    .sub-section--tsuruse-event-nav {
        position: sticky;
        top: 24px;
        align-self: flex-start;
    }
}