.pos-page-intro {
    color: #5f6775;
    font-size: 0.95rem;
    max-width: 44rem;
}

.pos-back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: #1a3a6b;
    text-decoration: none;
    margin-bottom: 0.75rem;
}

.pos-back-link:hover {
    color: #122440;
}

.pos-layout {
    display: grid;
    grid-template-columns: minmax(480px, 1.35fr) minmax(300px, 1fr);
    gap: 1.25rem;
    align-items: start;
}

@media (max-width: 991.98px) {
    .pos-layout {
        grid-template-columns: 1fr;
    }
}

.pos-diagram-card {
    border: 1px solid #e3eaf2;
    border-radius: 12px;
    background: #fff;
    overflow: hidden;
    position: sticky;
    top: 5.5rem;
}

.pos-diagram-header {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid #e6dfd4;
    background: #fbfcfd;
}

.pos-diagram-header h2 {
    font-size: 0.95rem;
    font-weight: 700;
    margin: 0;
}

.pos-diagram-caption {
    font-size: 0.78rem;
    color: #6c757d;
    margin: 0.2rem 0 0;
}

.pos-field-wrap {
    padding: 0.85rem;
}

.pos-formation-img {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 8px;
}

.pos-list-card {
    border: 1px solid #e3eaf2;
    border-radius: 12px;
    background: #fff;
    overflow: hidden;
}

.pos-list-card .card-header {
    background: #fff;
    border-bottom: 1px solid #e6dfd4;
    padding: 0.65rem 0.85rem;
}

.pos-accordion .accordion-item {
    border-left: 0;
    border-right: 0;
    border-color: #e9eef4;
}

.pos-accordion .accordion-item:first-of-type {
    border-top: 0;
}

.pos-accordion .accordion-button {
    padding: 0.95rem 1.1rem;
    font-weight: 700;
    font-size: 0.95rem;
    color: #1c1f26;
    background: #fff;
    box-shadow: none;
}

.pos-accordion .accordion-button:not(.collapsed) {
    color: #1a3a6b;
    background: #f7f9fc;
}

.pos-accordion .accordion-button:focus {
    box-shadow: none;
    border-color: #e9eef4;
}

.pos-group-abbr {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 2.4rem;
    margin-right: 0.55rem;
    padding: 0.18rem 0.45rem;
    border-radius: 6px;
    background: rgba(26, 58, 107, 0.08);
    color: #1a3a6b;
    font-size: 0.78rem;
    font-weight: 800;
}

.pos-accordion .accordion-body {
    padding: 0 1.1rem 1rem;
}

.pos-group-summary {
    color: #5f6775;
    font-size: 0.88rem;
    margin-bottom: 0.85rem;
}

.pos-sub-list {
    display: grid;
    gap: 0.65rem;
}

.pos-sub-item {
    border: 1px solid #e9eef4;
    border-radius: 8px;
    padding: 0.7rem 0.8rem;
    background: #fbfcfd;
}

.pos-sub-item h4 {
    font-size: 0.88rem;
    font-weight: 700;
    margin: 0 0 0.25rem;
}

.pos-sub-item p {
    font-size: 0.82rem;
    color: #5f6775;
    margin: 0;
}

.pos-sub-abbr {
    color: #1a3a6b;
    font-weight: 800;
}