/* ============================================================================
   SPURA HUB v3 — Collapsible card sections
   ============================================================================ */

.tx-collapsible-header,
.card-header.tx-collapsible-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    min-height: 0;
    padding: 0.75rem var(--surface-padding);
    cursor: pointer;
    user-select: none;
}

.tx-collapsible-header .card-title {
    margin: 0;
    font-size: 0.95rem;
    line-height: 1.15;
}

.collapsible-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    flex: 0 0 auto;
    padding: 0.3rem 0.55rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-surface);
    color: var(--text-secondary);
    font-size: 0.8125rem;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.collapsible-toggle:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.collapsible-toggle .toggle-icon {
    display: inline-block;
    font-style: normal;
    transition: transform var(--transition-fast);
}

.collapsible-toggle.open .toggle-icon {
    transform: rotate(90deg);
}