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var(--color-focus-contrast);outline:0;position:relative;z-index:1}.domino-status{align-items:center;display:flex;flex-wrap:wrap;gap:.55rem 1rem;justify-content:space-between}.domino-status p{margin:0}.decision-lab .lab-board-column,.decision-lab .lab-stage-panel{align-self:start}.domino-status button{border-color:var(--ink, var(--color-puzzle-ink));color:var(--ink, var(--color-puzzle-ink));background:transparent}.domino-status button:hover,.domino-status button:focus-visible{background:var(--ink, var(--color-puzzle-ink));color:var(--color-soft-white)}:root{--font-reading: Baskerville, "Palatino Linotype", Georgia, serif;--font-interface: "Gill Sans", "Trebuchet MS", sans-serif;color:var(--color-root-text);background:var(--browser-chrome-color);font-family:var(--font-interface);font-synthesis:none;--canvas: var(--browser-chrome-color);--canvas-soft: var(--color-bg-soft);--ink: var(--color-paper-strong);--ink-deep: var(--color-surface-inset);--paper: var(--color-surface);--paper-bright: var(--color-surface-raised);--paper-shadow: var(--color-paper-shadow);--amber: var(--color-accent);--amber-bright: var(--color-accent-strong);--color-lab-paper: var(--color-surface);--color-lab-ink: var(--color-paper-strong);--color-lab-gold: var(--color-accent);--color-lab-rust: var(--color-accent-strong);--color-lab-band: var(--color-bg-soft);--color-lab-backdrop: var(--color-bg);--color-lab-inverse: var(--color-text-inverse);--color-lab-muted: var(--color-inverse-muted);--color-lab-mix: var(--color-surface-raised);--color-lab-control-hover: var(--color-surface-raised);--color-lab-legacy-text: var(--color-text-inverse);--color-lab-legacy-start: var(--color-bg-deep);--color-lab-legacy-mid: var(--color-bg);--color-lab-legacy-end: var(--color-bg-soft);--color-on-lab-solid: var(--color-surface);--mix-lab-glow: var(--color-accent);--mix-lab-dark: var(--color-bg-deep);--mix-lab-shadow: var(--color-shadow);--mix-lab-rust-shadow: var(--color-accent-strong);--surface-lab-control: color-mix( in srgb, var(--color-surface-raised) 55%, transparent );--surface-lab-paper-66: color-mix( in srgb, var(--color-surface-raised) 66%, transparent );--surface-lab-paper-82: color-mix( in srgb, var(--color-surface-raised) 82%, transparent );--surface-lab-paper-94: color-mix( in srgb, var(--color-surface-raised) 94%, transparent );--sage: var(--color-success);--mint: var(--color-mint);--focus: var(--color-focus);--text-scale: 1;--type-caption: clamp(.72rem, .69rem + .15vi, .82rem);--type-body: clamp(1rem, .96rem + .2vi, 1.12rem);--type-lead: clamp(1.08rem, 1rem + .4vi, 1.34rem);--type-step-1: clamp(1.25rem, 1.12rem + .65vi, 1.65rem);--type-step-2: clamp(1.55rem, 1.3rem + 1.25vi, 2.3rem);--type-step-3: clamp(1.95rem, 1.55rem + 2vi, 3.2rem);--type-display: clamp(2.35rem, 1.72rem + 3.15vi, 4.7rem);--space-2xs: clamp(.35rem, .31rem + .2vi, .5rem);--space-xs: clamp(.55rem, .48rem + .35vi, .8rem);--space-s: clamp(.8rem, .7rem + .5vi, 1.15rem);--space-m: clamp(1.1rem, .93rem + .85vi, 1.7rem);--space-l: clamp(1.55rem, 1.2rem + 1.75vi, 2.8rem);--space-xl: clamp(2.2rem, 1.5rem + 3.5vi, 4.6rem);--measure-prose: 66ch;--measure-copy: 48rem;--measure-surface: 82rem;--control-gap: var(--space-xs)}@supports not (inline-size: 1svh){:root{--type-caption: clamp(.72rem, .69rem + .15vw, .82rem);--type-body: clamp(1rem, .96rem + .2vw, 1.12rem);--type-lead: clamp(1.08rem, 1rem + .4vw, 1.34rem);--type-step-1: clamp(1.25rem, 1.12rem + .65vw, 1.65rem);--type-step-2: clamp(1.55rem, 1.3rem + 1.25vw, 2.3rem);--type-step-3: clamp(1.95rem, 1.55rem + 2vw, 3.2rem);--type-display: clamp(2.35rem, 1.72rem + 3.15vw, 4.7rem);--space-2xs: clamp(.35rem, .31rem + .2vw, .5rem);--space-xs: clamp(.55rem, .48rem + .35vw, .8rem);--space-s: clamp(.8rem, .7rem + .5vw, 1.15rem);--space-m: clamp(1.1rem, .93rem + .85vw, 1.7rem);--space-l: clamp(1.55rem, 1.2rem + 1.75vw, 2.8rem);--space-xl: clamp(2.2rem, 1.5rem + 3.5vw, 4.6rem)}}@supports not (color: color-mix(in srgb,red,blue)){:root{--surface-lab-control: 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button:active,.source-media-trigger:active{transform:scale(.97)}:focus-visible{outline:var(--control-focus-width) solid var(--focus);outline-offset:var(--control-focus-offset)}.skip-link{position:fixed;z-index:100;top:.75rem;left:1rem;padding:.75rem 1rem;color:var(--ink-deep);background:var(--focus);transform:translateY(-180%)}.skip-link:focus{transform:translateY(0)}.reader{min-block-size:100vh;min-block-size:100dvh;font-size:calc(1rem * var(--text-scale))}@supports not (inline-size: 1svh){.reader{min-block-size:100vh}}.wordmark{display:flex;flex-direction:column;color:var(--color-brand);letter-spacing:.08em}.wordmark>span{font-family:var(--font-reading);font-size:1.45rem}.wordmark small,.breadcrumb,.eyebrow,.source-note,.book-meta,.move-ledger,.book-footer{font-size:.69rem;line-height:1.4;letter-spacing:.11em;text-transform:uppercase}.book-page .eyebrow,.book-page .source-note,.book-page .book-meta{font-size:.69em}.book-page .primary-action,.book-page 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.eyebrow{color:var(--amber-bright)}.reader-rail strong{margin-top:2rem;color:var(--color-brand);font-family:var(--font-reading);font-size:3.3rem;font-weight:400}.reader-rail>span{max-width:10rem;font-family:var(--font-reading);font-size:1.2rem;line-height:1.2;hyphens:none;-webkit-hyphens:none;text-wrap:balance}.rail-progress{display:flex;align-items:baseline;gap:.5rem;margin-top:auto;color:var(--color-progress-muted)}.rail-progress b{color:var(--color-progress-strong);font-size:1.3rem}.source-note{color:var(--color-chrome-faint)}.rail-sections{display:grid;gap:.35rem;margin:1.2rem -.35rem}.rail-sections button{display:grid;grid-template-columns:auto 1fr;gap:.55rem;align-items:baseline;padding:.45rem .5rem;color:var(--color-inverse-subtle);border:0;border-left:2px solid transparent;background:transparent;text-align:left;cursor:pointer;hyphens:none;-webkit-hyphens:none}.rail-sections button:hover,.rail-sections button:focus-visible{color:var(--color-inverse-bright);border-left-color:var(--amber-bright)}.rail-sections button[aria-current=page]{color:var(--color-brand);border-left-color:var(--color-brand);cursor:default}.rail-sections b{font-size:.78rem}.rail-sections span{font:.82rem/1.15 Baskerville,Palatino Linotype,Georgia,serif}.book-page{position:relative;overflow:hidden;padding:clamp(2rem,6vw,5.5rem) clamp(1.5rem,7vw,6.5rem);color:var(--color-text);border:1px solid var(--color-border);border-radius:1.4rem .4rem .4rem 1.4rem;background:linear-gradient(90deg,color-mix(in srgb,var(--mix-paper-edge) 12%,transparent),transparent 7%,transparent 94%,color-mix(in srgb,var(--mix-paper-gutter) 9%,transparent)),repeating-linear-gradient(0deg,color-mix(in srgb,var(--mix-paper-fiber) 2%,transparent) 0,color-mix(in srgb,var(--mix-paper-fiber) 2%,transparent) 1px,transparent 1px,transparent 5px),var(--paper-bright);box-shadow:-1rem 1.5rem 4rem color-mix(in srgb,var(--color-shadow) 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var(--color-border-paper-strong)}.book-header .eyebrow,.anchor-copy .eyebrow,.lab-stage-kicker,.lab-evidence-role,.lab-evidence-label,.lab-path-records strong{color:var(--color-paper-accent)}.book-meta{color:var(--color-paper-muted);text-align:right}.book-page h1{max-width:16ch;margin:2.2rem 0 1.6rem;color:var(--ink);font-family:var(--font-reading);font-size:clamp(2.3em,5vw,4.8em);font-weight:500;line-height:.98;letter-spacing:-.035em}.book-page>div>p,.book-page>p{margin:0 0 1.15em;font-family:var(--font-reading);font-size:1.18em;line-height:calc(1.68 * var(--reading-leading, 1));text-wrap:pretty}.book-page figure{position:relative;margin:2.8rem 0;padding:1.4rem 0}.source-anchor{display:block;width:1px;height:1px;overflow:hidden}.book-page figcaption,.diagram-caption{margin-top:1rem;color:var(--color-paper-caption);font-family:var(--font-reading);text-align:center}.interactive-anchor{display:grid;grid-template-columns:minmax(0,1fr) minmax(11rem,16rem);align-items:center;gap:clamp(1rem,4vw,3rem);margin:2.7rem 0 3.2rem;padding:clamp(1.4rem,4vw,2.6rem) 0;color:var(--color-text)}.anchor-copy h2{margin:.35rem 0 .9rem;color:var(--color-text);font-family:var(--font-reading);font-size:clamp(1.5em,3vw,2.2em);font-weight:500;line-height:1.1;hyphens:none;-webkit-hyphens:none;text-wrap:balance}.anchor-copy>p:not(.eyebrow){color:var(--color-text-muted, var(--color-text));line-height:1.5}.anchor-copy>.menu-entry{--menu-entry-ink: var(--color-text);--menu-entry-title-ink: var(--color-text);--menu-entry-meta-ink: var(--color-text-muted, var(--color-text));--menu-entry-border: color-mix( in srgb, var(--mix-soft-border) 38%, transparent );--menu-entry-ground: color-mix( in srgb, var(--color-paper-strong) 6%, transparent );--menu-entry-ground-hover: color-mix( in srgb, var(--color-paper-strong) 11%, transparent );--menu-entry-stripe-strong: var(--color-accent);max-width:30rem;margin-top:.2rem}@supports not (color: color-mix(in 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srgb,red,blue)){.outline-action,.secondary-action{background:transparent}}.secondary-action{display:inline-flex;align-items:center;justify-content:center;text-align:center;text-decoration:none}.launch-screen{position:relative;display:grid;grid-template-columns:minmax(18rem,.8fr) minmax(20rem,1fr);min-height:100vh;overflow:hidden;background:linear-gradient(90deg,color-mix(in srgb,var(--mix-launch-veil) 25%,transparent),color-mix(in srgb,var(--mix-launch-veil) 92%,transparent)),repeating-linear-gradient(135deg,transparent 0 34px,color-mix(in srgb,var(--mix-launch-pattern) 3%,transparent) 34px 35px),radial-gradient(circle at 18% 42%,var(--color-launch-glow),var(--color-launch-mid) 42%,var(--color-launch-deep) 78%)}@supports not (color: color-mix(in srgb,red,blue)){.launch-screen{background:linear-gradient(90deg,transparent,var(--mix-launch-veil)),repeating-linear-gradient(135deg,transparent 0 34px,transparent 34px 35px),radial-gradient(circle at 18% 42%,var(--color-launch-glow),var(--color-launch-mid) 42%,var(--color-launch-deep) 78%)}}.launch-screen:before{content:"";position:absolute;z-index:0;top:-20%;right:-20%;bottom:-20%;left:-20%;pointer-events:none;background:radial-gradient(38% 42% at 30% 38%,color-mix(in srgb,var(--color-accent) 13%,transparent),transparent 70%),radial-gradient(32% 36% at 68% 62%,color-mix(in srgb,var(--mix-launch-motif) 9%,transparent),transparent 72%);animation:launch-ground-wake 1.5s var(--ambient-phase, 0ms) ease-out both,launch-ground-drift 26s var(--ambient-phase, 0ms) ease-in-out infinite}@supports not (inset: 0){.launch-screen:before{top:-20%;right:-20%;bottom:-20%;left:-20%}}@supports not (color: color-mix(in srgb,red,blue)){.launch-screen:before{background:radial-gradient(38% 42% at 30% 38%,transparent,transparent 70%),radial-gradient(32% 36% at 68% 62%,transparent,transparent 72%)}}.launch-screen:after{position:absolute;right:-24vw;bottom:-32vw;width:76vw;aspect-ratio:1;content:"";pointer-events:none;background:radial-gradient(circle closest-side,transparent 61%,color-mix(in srgb,var(--color-accent-strong) 3%,transparent) 62.6%,color-mix(in srgb,var(--color-accent-strong) 18%,transparent) 63% 63.4%,color-mix(in srgb,var(--color-accent-strong) 4%,transparent) 65%,color-mix(in srgb,var(--color-accent-strong) 3%,transparent) 74%,color-mix(in srgb,var(--color-accent-strong) 2%,transparent) 84%,transparent 97%)}@supports not (color: color-mix(in srgb,red,blue)){.launch-screen:after{background:radial-gradient(circle closest-side,transparent 61%,transparent 62.6%,transparent 63% 63.4%,transparent 65%,transparent 74%,transparent 84%,transparent 97%)}}.launch-motif{position:sticky;inset-block-start:0;display:grid;block-size:100vh;place-items:center}@supports not (inset: 0){.launch-motif{top:0}}.launch-motif 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auto;flex-wrap:nowrap;gap:var(--space-xs);align-items:center}.move-peek-steps>button{min-inline-size:44px;min-block-size:44px;padding-inline:var(--space-xs);color:var(--color-dialog-copy);border:0;background:transparent;font-size:1.25em;line-height:1;cursor:pointer}.move-peek-steps>button:disabled{opacity:.35;cursor:default}.move-peek-step-count{min-inline-size:4ch;font-size:.78em;text-align:center;font-variant-numeric:tabular-nums}main#book-content .book-page>*{transition:opacity .26s ease}.reader[data-arriving=true] main#book-content .book-page>*{opacity:0;transition:none}main#book-content{position:relative}.reader{overflow-x:clip}main#book-content>.page-ribbons{position:absolute;z-index:29;top:0;right:0;bottom:0;left:0;pointer-events:none;transition:opacity .26s ease}@supports not (inset: 0){main#book-content>.page-ribbons{top:0;right:0;bottom:0;left:0}}.reader[data-arriving=true] main#book-content>.page-ribbons{opacity:0;transition:none}.reader[data-arriving=true] .page-ribbon-tail{animation:none}.page-ribbon-stand{position:absolute;inset-inline:0;display:flex;align-items:center;justify-content:flex-end;pointer-events:none}@supports not (inset: 0){.page-ribbon-stand{left:0;right:0}}.page-ribbon{--tab-in: 2.1rem;--tab-out: 1.35rem;--tab-height: 1.3rem;--tab-head: .72rem;--ribbon-ink: var(--color-accent-strong);position:relative;inline-size:var(--control-hit-size, 44px);block-size:var(--control-hit-size, 44px);padding:0;border:0;background:transparent;pointer-events:auto;cursor:grab;touch-action:none}.page-ribbon-tail{position:absolute;inset-block-start:50%;inset-inline-end:calc(-1 * var(--tab-out));inline-size:calc(var(--tab-in) + var(--tab-out));block-size:var(--tab-height);translate:0 -50%;filter:drop-shadow(0 .18rem .36rem color-mix(in srgb,var(--color-shadow) 38%,transparent));animation:page-ribbon-arrive .38s var(--ease-entrance) both;transition:translate .16s var(--ease-standard)}@supports not (inset: 0){.page-ribbon-tail{top:50%;right:calc(-1 * var(--tab-out))}}@supports not (color: color-mix(in srgb,red,blue)){.page-ribbon-tail{filter:drop-shadow(0 .18rem .36rem transparent)}}.page-ribbon-tail:before{position:absolute;top:0;right:0;bottom:0;left:0;content:"";background:linear-gradient(90deg,color-mix(in srgb,var(--ribbon-ink) 82%,var(--color-text-inverse)),var(--ribbon-ink) 42%,color-mix(in srgb,var(--ribbon-ink) 76%,var(--color-shadow)));-webkit-clip-path:polygon(0 50%,var(--tab-head) 0,100% 0,100% 100%,var(--tab-head) 100%);clip-path:polygon(0 50%,var(--tab-head) 0,100% 0,100% 100%,var(--tab-head) 100%)}@supports not (inset: 0){.page-ribbon-tail:before{top:0;right:0;bottom:0;left:0}}@supports not (color: color-mix(in srgb,red,blue)){.page-ribbon-tail:before{background:linear-gradient(90deg,var(--ribbon-ink),var(--ribbon-ink) 42%,var(--ribbon-ink))}}@keyframes page-ribbon-arrive{0%{translate:1.6rem -50%;opacity:0}}.page-ribbon:hover>.page-ribbon-tail,.page-ribbon:focus-visible>.page-ribbon-tail,.page-ribbon-stand[data-dragging] .page-ribbon-tail{translate:-.28rem -50%}.page-ribbon-name{position:absolute;inset-block-start:50%;inset-inline-end:calc(var(--tab-in) + .6rem);max-inline-size:min(16rem,45vw);padding:.3rem .62rem;color:var(--color-text-inverse);border:1px solid var(--color-border);border-radius:var(--control-radius);background:color-mix(in srgb,var(--color-bg) 94%,transparent);box-shadow:var(--elevation-1) color-mix(in srgb,var(--color-shadow) 30%,transparent);font-size:.8rem;font-weight:700;line-height:1.3;white-space:nowrap;text-overflow:ellipsis;overflow:hidden;opacity:0;translate:.3rem -50%;pointer-events:none;transition:opacity .14s var(--ease-standard),translate .14s var(--ease-standard)}@supports not (inset: 0){.page-ribbon-name{top:50%;right:calc(var(--tab-in) + .6rem)}}@supports not (color: color-mix(in srgb,red,blue)){.page-ribbon-name{background:var(--color-bg);box-shadow:var(--elevation-1) transparent}}.page-ribbon:hover>.page-ribbon-name,.page-ribbon:focus-visible>.page-ribbon-name,.page-ribbon-stand[data-dragging] .page-ribbon-name{opacity:1;translate:0 -50%}.page-ribbon:focus-visible{outline:var(--control-focus-width) solid var(--focus);outline-offset:calc(-1 * var(--control-focus-width));border-radius:var(--control-radius)}.page-ribbon-stand[data-dragging]{z-index:4}.page-ribbon-stand[data-dragging] .page-ribbon{cursor:grabbing}@media(prefers-reduced-motion:reduce){.page-ribbon-tail{animation:none;transition:none}.page-ribbon-name,main#book-content>.page-ribbons{transition:none}}::highlight(vyb-highlight-amber){background-color:color-mix(in srgb,var(--mark-amber) 42%,transparent)}@supports not (color: color-mix(in srgb,red,blue)){::highlight(vyb-highlight-amber){background-color:transparent}}::highlight(vyb-highlight-green){background-color:color-mix(in srgb,var(--mark-green) 40%,transparent)}@supports not (color: color-mix(in srgb,red,blue)){::highlight(vyb-highlight-green){background-color:transparent}}::highlight(vyb-highlight-rose){background-color:color-mix(in srgb,var(--mark-rose) 42%,transparent)}@supports not (color: color-mix(in srgb,red,blue)){::highlight(vyb-highlight-rose){background-color:transparent}}::highlight(vyb-highlight-blue){background-color:color-mix(in srgb,var(--mark-blue) 40%,transparent)}@supports not (color: color-mix(in srgb,red,blue)){::highlight(vyb-highlight-blue){background-color:transparent}}::highlight(vyb-highlight-slate){background-color:color-mix(in srgb,var(--mark-slate) 36%,transparent)}@supports not (color: color-mix(in srgb,red,blue)){::highlight(vyb-highlight-slate){background-color:transparent}}::highlight(vyb-underline-amber){text-decoration:underline 2px solid var(--mark-amber-strong);text-underline-offset:.18em}::highlight(vyb-underline-green){text-decoration:underline 2px solid var(--mark-green-strong);text-underline-offset:.18em}::highlight(vyb-underline-rose){text-decoration:underline 2px solid var(--mark-rose-strong);text-underline-offset:.18em}::highlight(vyb-underline-blue){text-decoration:underline 2px solid var(--mark-blue-strong);text-underline-offset:.18em}::highlight(vyb-underline-slate){text-decoration:underline 2px solid var(--mark-slate-strong);text-underline-offset:.18em}.mark-tray{--reader-tool-size: clamp( 44px, var(--control-hit-size, 44px), min(22vw, 22vh) );position:fixed;z-index:30;inset-block-end:var(--corner-inset-block-end);inset-inline-end:var(--corner-inset-inline-end);display:flex;flex-direction:column;gap:.45rem;align-items:center;transition:opacity .2s ease,translate .2s ease}@supports not (inset: 0){.mark-tray{bottom:var(--corner-inset-block-end);right:var(--corner-inset-inline-end)}}.mark-tray-toggle{display:grid;inline-size:var(--reader-tool-size);block-size:var(--reader-tool-size);padding:0;place-items:center}.mark-tray[data-armed=amber] .mark-tray-toggle{color:var(--mark-amber-strong);border-color:color-mix(in srgb,var(--mark-amber-strong) 70%,transparent)}@supports not (color: color-mix(in srgb,red,blue)){.mark-tray[data-armed=amber] .mark-tray-toggle{border-color:var(--mark-amber-strong)}}.mark-tray[data-armed=green] .mark-tray-toggle{color:var(--mark-green-strong);border-color:color-mix(in srgb,var(--mark-green-strong) 70%,transparent)}@supports not (color: color-mix(in srgb,red,blue)){.mark-tray[data-armed=green] .mark-tray-toggle{border-color:var(--mark-green-strong)}}.mark-tray[data-armed=rose] .mark-tray-toggle{color:var(--mark-rose-strong);border-color:color-mix(in srgb,var(--mark-rose-strong) 70%,transparent)}@supports not (color: color-mix(in srgb,red,blue)){.mark-tray[data-armed=rose] .mark-tray-toggle{border-color:var(--mark-rose-strong)}}.mark-tray[data-armed=blue] .mark-tray-toggle{color:var(--mark-blue-strong);border-color:color-mix(in srgb,var(--mark-blue-strong) 70%,transparent)}@supports not (color: color-mix(in srgb,red,blue)){.mark-tray[data-armed=blue] .mark-tray-toggle{border-color:var(--mark-blue-strong)}}.mark-tray[data-armed=slate] .mark-tray-toggle{color:var(--mark-slate-strong);border-color:color-mix(in srgb,var(--mark-slate-strong) 70%,transparent)}@supports not (color: color-mix(in srgb,red,blue)){.mark-tray[data-armed=slate] .mark-tray-toggle{border-color:var(--mark-slate-strong)}}.mark-tray[data-armed=eraser] .mark-tray-toggle{color:var(--color-accent);border-color:color-mix(in srgb,var(--color-accent) 70%,transparent)}@supports not (color: color-mix(in srgb,red,blue)){.mark-tray[data-armed=eraser] .mark-tray-toggle{border-color:var(--color-accent)}}.mark-tray-pens{position:absolute;inset-block-end:100%;margin-block-end:.45rem;display:flex;flex-direction:column;max-block-size:calc(100dvh - 15rem);overflow-y:auto;overscroll-behavior:contain;gap:.15rem;padding:.3rem;border:1px solid var(--color-border-strong);border-radius:var(--control-radius-pill);background:color-mix(in srgb,var(--color-bg) 92%,transparent);box-shadow:var(--elevation-2) color-mix(in srgb,var(--color-shadow) 34%,transparent);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);transform-origin:bottom center;opacity:0;visibility:hidden;scale:.82;translate:0 .5rem;pointer-events:none;transition:opacity .12s var(--ease-exit),scale .12s var(--ease-exit),translate .12s var(--ease-exit),visibility 0s linear .12s}@supports not (inline-size: 1svh){.mark-tray-pens{max-block-size:calc(100vh - 15rem)}}@supports not (inset: 0){.mark-tray-pens{bottom:100%;margin-bottom:.45rem}}@supports not (color: color-mix(in srgb,red,blue)){.mark-tray-pens{background:var(--color-bg);box-shadow:var(--elevation-2) transparent}}.mark-history-actions{display:flex;border:1px solid var(--color-border-strong);border-radius:var(--control-radius-pill);background:var(--color-bg)}.mark-history-error{max-inline-size:min(18rem,70vw);padding:var(--space-2);border:1px solid var(--color-border-strong);border-radius:var(--control-radius-pill);background:var(--color-bg);color:var(--color-text)}.mark-tray[data-open] .mark-tray-pens{opacity:1;visibility:visible;scale:1;translate:0 0;pointer-events:auto;transition:opacity .16s var(--ease-overshoot),scale .18s var(--ease-overshoot),translate .18s var(--ease-overshoot),visibility 0s linear 0s}.mark-tray-bookmarks{position:relative;display:grid;inline-size:var(--reader-tool-size);block-size:var(--reader-tool-size);padding:0;place-items:center}.mark-tray-bookmark-count{position:absolute;inset-block-start:-.3rem;inset-inline-end:-.3rem;display:grid;min-inline-size:1.15rem;block-size:1.15rem;padding-inline:.22rem;color:var(--color-action-ink);border:2px solid var(--color-bg);border-radius:var(--control-radius-pill);background:var(--color-accent);font-size:.6rem;font-weight:700;place-items:center}@supports not (inset: 0){.mark-tray-bookmark-count{top:-.3rem;right:-.3rem;padding-left:.22rem;padding-right:.22rem}}@media(prefers-reduced-motion:reduce){.mark-tray-pens,.mark-tray[data-open] .mark-tray-pens{transition:none}}.mark-pen{display:grid;inline-size:var(--reader-tool-size, var(--control-hit-size, 44px));block-size:var(--reader-tool-size, var(--control-hit-size, 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color-mix(in srgb,var(--color-shadow) 34%,transparent);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);translate:-50% 0}@supports not (color: color-mix(in srgb,red,blue)){.mark-popover{background:var(--color-bg);box-shadow:var(--elevation-2) transparent}}.mark-popover[data-placement=above]{translate:-50% calc(-100% - .6rem)}.mark-popover[data-placement=below]{translate:-50% .6rem}.mark-tray-kinds{display:flex;flex-direction:column;gap:.1rem;padding-block:.15rem;border-block:1px solid color-mix(in srgb,var(--color-border-strong) 55%,transparent)}@supports not (inset: 0){.mark-tray-kinds{padding-top:.15rem;padding-bottom:.15rem;border-top:1px;border-bottom:solid}}@supports not (color: color-mix(in srgb,red,blue)){.mark-tray-kinds{border-block:1px solid var(--color-border-strong)}}.mark-pen-kind-glyph-highlight{padding-inline:.15rem;background:color-mix(in srgb,var(--mark-amber) 55%,transparent);text-decoration:none;border-radius:var(--surface-radius-sm)}@supports not (inset: 0){.mark-pen-kind-glyph-highlight{padding-left:.15rem;padding-right:.15rem}}@supports not (color: color-mix(in srgb,red,blue)){.mark-pen-kind-glyph-highlight{background:var(--mark-amber)}}.book-page .page-ink{position:absolute;top:0;right:0;bottom:0;left:0;inline-size:100%;block-size:100%;overflow:visible;pointer-events:none}@supports not (inset: 0){.book-page .page-ink{top:0;right:0;bottom:0;left:0}}.book-page .page-ink[data-drawing]{z-index:3;pointer-events:auto;cursor:crosshair;touch-action:none}.page-ink-stroke{fill:none;stroke-linecap:round;stroke-linejoin:round;opacity:.85}.page-ink-amber{stroke:var(--mark-amber-strong)}.page-ink-green{stroke:var(--mark-green-strong)}.page-ink-rose{stroke:var(--mark-rose-strong)}.page-ink-blue{stroke:var(--mark-blue-strong)}.page-ink-slate{stroke:var(--mark-slate-strong)}[data-pen-writing]{touch-action:pan-y;-webkit-touch-callout:none}.book-page .page-ink[data-erasing]{z-index:3;pointer-events:auto;cursor:cell;touch-action:none}.mark-tray-tip{display:grid;gap:.2rem;place-items:center;padding:.3rem .25rem}.mark-tray-tip>span{position:absolute;width:1px;height:1px;overflow:hidden;-webkit-clip-path:inset(50%);clip-path:inset(50%);white-space:nowrap}.mark-tray-tip>input{inline-size:2.4rem;accent-color:var(--color-accent)}.mark-pen-kind-glyph{font-size:.85rem;font-weight:700;text-decoration:underline 2px solid currentColor;text-underline-offset:.18em}p[data-resumed=true]{position:relative}p[data-resumed=true]:before{content:"";position:absolute;inset-block:-.15em;inset-inline-start:-.9rem;inline-size:3px;border-radius:3px;background:var(--color-accent-strong)}@supports not (inset: 0){p[data-resumed=true]:before{top:-.15em;bottom:-.15em;left:-.9rem}}.rail-reading-time{display:flex;gap:var(--space-xs);align-items:baseline;flex-wrap:wrap;margin:0}.rail-reading-total{inline-size:100%;font-size:var(--type-caption);opacity:.7}@media(min-width:100rem){.reader-layout{grid-template-columns:minmax(14rem,20rem) minmax(0,min(62rem,1360px));gap:clamp(2rem,4vw,6rem)}.book-page{padding-inline:8.5rem;--plate-bleed: 7rem}@supports not (inset: 0){.book-page{padding-left:8.5rem;padding-right:8.5rem}}.book-page .printed-page-break,.book-page>div>p,.book-page>p{max-inline-size:none}.book-page .interactive-anchor{align-items:start}.book-page .source-media{inline-size:calc(100% + 2 * var(--plate-bleed));max-inline-size:calc(100% + 2 * var(--plate-bleed));margin-inline:calc(-1 * var(--plate-bleed))}}@media(min-width:100rem){.interactive-anchor .anchor-board{flex:0 1 24rem;inline-size:min(100%,24rem);max-inline-size:24rem}}@media(min-width:160rem){.reader-layout{grid-template-columns:minmax(16rem,24rem) minmax(0,min(62rem,1360px))}.interactive-anchor .anchor-board{flex:0 1 32rem;inline-size:min(100%,32rem);max-inline-size:32rem}}.reading-legend{--rail-edge: max(.55rem, calc(env(safe-area-inset-right, 0px) + .4rem) );--rail-track: 2px;--rail-thumb: 4px;--rail-thumb-held: 6px;--rail-dash: 9px;--rail-dot: 7px;position:fixed;z-index:28;inset-block:0;inset-inline-end:0;inline-size:var(--legend-width);padding-block:calc(var(--control-hit-size) + max(1.75rem,env(safe-area-inset-top,0px))) calc(2 * var(--control-hit-size) + max(3.2rem,calc(env(safe-area-inset-bottom,0px) + 3.2rem)));display:flex;flex-direction:column;pointer-events:none}@supports not (inset: 0){.reading-legend{top:0;bottom:0;right:0;padding-top:calc(var(--control-hit-size) + max(1.75rem,env(safe-area-inset-top,0px)));padding-bottom:calc(2 * var(--control-hit-size) + max(3.2rem,calc(env(safe-area-inset-bottom,0px) + 3.2rem)))}}.reading-legend-rail{position:relative;flex:1 1 auto;inline-size:100%;min-block-size:0;pointer-events:auto;touch-action:none}.reading-legend:before{position:absolute;inset-block:0;inset-inline-end:var(--rail-edge);content:"";inline-size:var(--rail-track);border-radius:var(--control-radius-pill);background:color-mix(in srgb,var(--color-paper-strong) 22%,transparent);-webkit-mask-image:linear-gradient(to bottom,transparent,#000 5.5rem,#000 calc(100% - 9rem),transparent);mask-image:linear-gradient(to bottom,transparent,#000 5.5rem,#000 calc(100% - 9rem),transparent);opacity:0;transition:opacity .2s var(--ease-standard)}@supports not (inset: 0){.reading-legend:before{top:0;bottom:0;right:var(--rail-edge)}}@supports not (color: color-mix(in srgb,red,blue)){.reading-legend:before{background:transparent}}.reading-legend[data-awake]:before,.reading-legend:focus-within:before{opacity:1}.reading-legend-thumb{position:absolute;inset-block-start:calc(var(--legend-thumb-at, 0) * 100%);inset-inline-end:calc(var(--rail-edge) - (var(--rail-thumb) - var(--rail-track)) / 2);inline-size:var(--rail-thumb);block-size:max(2rem,calc(var(--legend-thumb-extent, 0) * 100%));max-block-size:calc(100% - var(--legend-thumb-at, 0) * 100%);border-radius:var(--control-radius-pill);background:color-mix(in srgb,var(--color-paper-strong) 34%,transparent);pointer-events:none;transition:inline-size .16s var(--ease-standard),inset-inline-end .16s var(--ease-standard),background-color .16s var(--ease-standard)}@supports not (inset: 0){.reading-legend-thumb{top:calc(var(--legend-thumb-at, 0) * 100%);right:calc(var(--rail-edge) - (var(--rail-thumb) - var(--rail-track)) / 2)}}@supports not (color: color-mix(in srgb,red,blue)){.reading-legend-thumb{background:transparent}}.reading-legend[data-awake] .reading-legend-thumb,.reading-legend:focus-within .reading-legend-thumb{background:color-mix(in srgb,var(--color-paper-strong) 62%,transparent)}@supports not (color: color-mix(in srgb,red,blue)){.reading-legend[data-awake] .reading-legend-thumb,.reading-legend:focus-within .reading-legend-thumb{background:var(--color-paper-strong)}}.reading-legend[data-scrubbing] .reading-legend-thumb{inline-size:var(--rail-thumb-held);inset-inline-end:calc(var(--rail-edge) - (var(--rail-thumb-held) - var(--rail-track)) / 2);background:var(--color-accent-strong)}@supports not (inset: 0){.reading-legend[data-scrubbing] .reading-legend-thumb{right:calc(var(--rail-edge) - (var(--rail-thumb-held) - var(--rail-track)) / 2)}}.reading-legend-tick{position:absolute;inset-block-start:calc(var(--legend-at, 0) * 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