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button[aria-pressed=true]{background:#f2b597;color:#17202a}.book__stage{flex:1;min-height:0;display:grid;place-items:center;padding:16px 32px;container-type:size}.book__host{width:min(100cqw - 32px,(100cqh - 16px) / var(--ratio, 1) * 2);filter:drop-shadow(0 18px 40px rgb(0 0 0 / .55))}.book__page{position:relative;width:100%;height:100%;overflow:hidden;background:#fff}.book__spread{position:absolute}.book__spread .sv{box-shadow:none}.book__page:after{content:"";position:absolute;top:0;bottom:0;width:6%;pointer-events:none}.book__page--left:after{right:0;background:linear-gradient(to left,rgb(0 0 0 / .16),transparent)}.book__page--right:after{left:0;background:linear-gradient(to right,rgb(0 0 0 / .16),transparent)}.book__nav{display:flex;align-items:center;justify-content:center;gap:8px;padding:10px 16px calc(16px + env(safe-area-inset-bottom,0px));font-size:12px}.editor__notice{position:absolute;bottom:10px;left:50%;transform:translate(-50%);margin:0;padding:6px 12px;border-radius:8px;background:var(--active);color:var(--active-text);font-size:12px;white-space:nowrap}.editor__help{position:absolute;right:12px;top:52px;z-index:4;width:26px;height:26px;border-radius:50%;border:1px solid var(--border);background:var(--surface);color:var(--muted);font-weight:700;cursor:pointer}.editor__help[aria-expanded=true]{color:var(--text);border-color:var(--muted)}.editor__helptext{position:absolute;right:12px;top:84px;z-index:7;max-width:340px;padding:12px 14px;border-radius:10px;border:1px solid var(--border);background:var(--raised);box-shadow:var(--shadow);font-size:12.5px;line-height:1.5}kbd{padding:0 4px;border:1px solid var(--border);border-radius:4px;font:600 11px var(--font-ui)}