.book-navigation-button{display:inline-flex;align-items:center;justify-content:center;flex:0 0 44px;width:44px;min-width:44px;height:44px;min-height:44px;padding:0;border:0;border-radius:8px;background:transparent;color:inherit;cursor:pointer;transition:background .14s,transform .14s}.book-navigation-button>svg{display:block;flex:none}.book-navigation-button.dorm-pressing{animation:none}[data-book-header]~* [data-thought-app-reader] .app-detail-backline,[data-book-header]~* [data-thought-app-reader] .inline-back[data-placement=narrow]{display:none!important}.book-navigation-button:not(:disabled):hover{background:var(--tree-soft,var(--studio-surface,var(--ui-surface,#e3e5e0)))}.book-navigation-button:not(:disabled):active{transform:translateY(1px)}.book-navigation-button:disabled{cursor:default;opacity:.45}.book-navigation-button:focus-visible{outline:3px solid var(--tree-ink,var(--studio-ink,var(--ui-text,#242824)));outline-offset:2px}@media (prefers-reduced-motion:reduce){.book-navigation-button{transition:none}}