/* ============================================
   グループ構造アコーディオン
   ============================================ */

.group-accordion {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md);
    background: var(--color-white);
    border: 2px solid var(--color-blue);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-blue);
    cursor: pointer;
    transition: var(--transition);
    margin-bottom: var(--space-md);
}

.group-accordion:hover {
    background: var(--color-gray-100);
    box-shadow: 0 4px 16px rgba(0, 113, 227, 0.15);
}

.group-accordion span {
    font-size: 16px;
}

.group-accordion-icon {
    transition: transform 0.3s ease;
}

.group-accordion.active .group-accordion-icon {
    transform: rotate(180deg);
}

.group-chart {
    margin-top: var(--space-md);
    padding: var(--space-lg);
    background: var(--color-gray-100);
    border-radius: var(--border-radius);
    animation: slideDown 0.3s ease;
}

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