/* Tool identity stays visible beside the horizontally scrolling chapter links. */
.section-nav .section-nav-inner { gap: 24px; }
.section-nav .section-nav-inner > nav { flex: 1 1 auto; width: auto; min-width: 0; }
.section-nav .section-nav-brand {
    display: inline-flex;
    flex: 0 0 auto;
    align-items: center;
    gap: 9px;
    min-height: 36px;
    padding-inline-end: 23px;
    border-inline-end: 1px solid #e4e8eb;
    color: #273344;
    font-size: 14px;
    font-weight: 700;
    white-space: nowrap;
}
.section-nav-brand-icon { display: grid; place-items: center; width: 28px; height: 28px; border-radius: 8px; background: #fff0e8; color: #ca6845; }
.section-nav-brand-icon svg { width: 18px; height: 18px; }
.section-nav .section-nav-brand:hover { color: #b35330; }
.section-nav .section-nav-brand:focus-visible { outline: 2px solid #ca6845; outline-offset: 3px; border-radius: 4px; }
@media (max-width: 720px) {
    .section-nav .section-nav-inner { gap: 14px; }
    .section-nav .section-nav-brand { font-size: 12px; gap: 7px; padding-inline-end: 13px; }
    .section-nav-brand-icon { width: 24px; height: 24px; border-radius: 6px; }
}