.nav-item {
    display: flex;
    align-items: flex-start;
}

.nav-item-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.collapse-btn {
    background: transparent;
    border: var(--deep-space-2);
    cursor: pointer;
    font-size: 1rem;
    color: var(--text-secondary, --esa-gray-dark);
    padding: 0.25rem;
    margin-top: 0.25rem;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.collapse-btn:hover {
    color: var(--text-primary, --esa-blue-dark);
}

.collapse-btn.collapsed {
    transform: rotate(-90deg);
}

.collapse-btn:before {
    content: "▼";
    font-size: 0.8rem;
}

.collapsible-content {
    overflow: hidden;
    transition: max-height 0.3s ease-out, opacity 0.2s ease-out;
    /* max-height: 1000px; */
    opacity: 1;
}

.collapsible-content.collapsed {
    max-height: 0;
    opacity: 0;
    margin-top: 0;
    padding-top: 0;
}


.report-list .report-list {
    margin-left: 0;
    padding-left: 0;
}

.report-list .report-list .report-list {
    margin-left: 0;
    padding-left: 0;
}


.nav-item .report-list {
    margin-top: 0.5rem;
}

.nav-item + .nav-item {
    margin-top: 0.25rem;
}

.nav-item .nav-item {
    margin-left: 0.5rem;
    border-left: 2px solid var(--gray);
    padding-left: 0.75rem;
}

.nav-item .nav-item .nav-item {
    border-left-color: var(--deep-space-2);
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}