.guide-reading-nav{top:var(--reading-header,88px);z-index:20;background:var(--paper);border-bottom:1px solid var(--line);box-shadow:0 4px 12px color-mix(in srgb,var(--ink) 4%,transparent);margin-top:-50px;margin-bottom:0;position:sticky}.guide-reading-nav[hidden]{visibility:hidden;display:block}.guide-reading-nav [hidden]{display:none}.guide-reading-nav>button{text-align:left;background:0 0;border:0;justify-content:space-between;align-items:center;gap:16px;width:100%;min-height:48px;padding:8px 4px;font-size:.8rem;line-height:1.5;display:flex}.guide-reading-current{align-items:center;gap:10px;min-width:0;display:flex}.guide-reading-current>span:last-child{white-space:nowrap;text-overflow:ellipsis;overflow:hidden}.guide-reading-count{font-variant-numeric:tabular-nums;color:var(--blue);flex-shrink:0;font-size:.7rem}.guide-reading-toggle{color:var(--muted);flex-shrink:0;align-items:center;gap:6px;display:flex}.guide-reading-nav>button[aria-expanded=true] .guide-reading-toggle svg{transform:rotate(180deg)}.guide-reading-progress{background:var(--line);height:2px}.guide-reading-progress>span{background:var(--blue);height:100%;display:block}.guide-reading-nav ol{overscroll-behavior:contain;max-height:min(32vh,280px);margin:0;padding:8px 4px;list-style:none;overflow-y:auto}.guide-reading-nav li a{overflow-wrap:anywhere;border-left:2px solid #0000;align-items:center;min-height:44px;padding:8px 12px;font-size:.875rem;line-height:1.6;display:flex}.guide-reading-nav li a[aria-current=location]{border-color:var(--blue);color:var(--blue);background:var(--soft)}.guide-reading-storage{margin:0;padding:8px 4px;font-size:.75rem;line-height:1.5}.guide-reading-detail .guide-article .guide-section,.guide-reading-detail .guide-article .guide-source,.guide-reading-detail .guide-article .guide-related{scroll-margin-top:var(--reading-clearance,48px)}@media (prefers-reduced-motion:reduce){.guide-reading-nav a,.guide-reading-nav button{transition:none}}