.reading-rail{border-left:1px solid var(--line-strong);overscroll-behavior:contain;align-self:start;max-height:calc(100dvh - 136px);padding-left:18px;display:grid;position:sticky;top:112px;overflow-y:auto}.reading-rail__header{justify-content:space-between;align-items:baseline;gap:14px;padding-bottom:10px;display:flex}.reading-rail__count,.reading-toc__number,.reading-rail-mobile__action{color:var(--ink-soft);font-family:SFMono-Regular,SF Mono,Consolas,Liberation Mono,Menlo,monospace;font-size:.68rem;font-weight:600}.reading-toc{display:grid}.reading-toc__link{border-top:1px solid var(--line-soft);color:var(--ink-soft);font-family:var(--font-serif);grid-template-columns:2rem minmax(0,1fr);align-items:baseline;gap:8px;padding:10px 0;font-size:.9rem;font-weight:520;line-height:1.25;display:grid}.reading-toc__link--level-3>:last-child{padding-left:10px}.reading-toc__link:hover,.reading-toc__link.is-active{color:var(--ink)}.reading-toc__link.is-active .reading-toc__number{color:var(--accent-strong)}.reading-toc__link:focus-visible,.reading-rail-mobile>summary:focus-visible{outline:2px solid color-mix(in srgb, var(--accent) 72%, transparent);outline-offset:3px}.reading-rail-mobile{display:none}@media (max-width:1100px){.reading-rail--desktop{display:none}.reading-rail-mobile{right:max(16px, env(safe-area-inset-right));bottom:max(16px, env(safe-area-inset-bottom));z-index:40;width:min(360px,100vw - 32px);display:block;position:fixed}.reading-rail-mobile>summary{border:1px solid var(--line-strong);background:color-mix(in srgb, var(--panel-bg) 94%, transparent);min-height:58px;box-shadow:var(--shadow-paper);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);cursor:pointer;grid-template-columns:minmax(0,1fr) auto auto;align-items:center;gap:14px;padding:10px 14px;list-style:none;display:grid}.reading-rail-mobile>summary::-webkit-details-marker{display:none}.reading-rail-mobile__copy{gap:3px;min-width:0;display:grid}.reading-rail-mobile__copy strong{color:var(--ink);font-family:var(--font-serif);text-overflow:ellipsis;white-space:nowrap;font-size:.96rem;font-weight:560;line-height:1.15;overflow:hidden}.reading-rail-mobile__action{color:var(--accent-strong)}.reading-rail-mobile__action--close,.reading-rail-mobile[open] .reading-rail-mobile__action--open{display:none}.reading-rail-mobile[open] .reading-rail-mobile__action--close{display:inline}.reading-rail-mobile__body{border:1px solid var(--line-strong);background:color-mix(in srgb, var(--panel-bg) 97%, transparent);width:100%;max-height:min(68dvh,540px);box-shadow:var(--shadow-paper);overscroll-behavior:contain;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);padding:16px;display:grid;position:absolute;bottom:calc(100% + 8px);right:0;overflow-y:auto}.reading-rail-mobile__body>.reading-rail__kicker{padding-bottom:10px}.reading-rail-mobile__body .reading-toc__link{padding-block:11px}}@media (max-width:480px){.reading-rail-mobile>summary{grid-template-columns:minmax(0,1fr) auto}.reading-rail-mobile>summary .reading-rail__count{display:none}}