.listen-bar{z-index:20;padding:6px 16px calc(6px + env(safe-area-inset-bottom,0px));background:var(--panel);border-top:1px solid var(--line);font-family:var(--font-ui);position:fixed;inset:auto 0 0}.listen-bar-row,.listen-notice{max-width:calc(40rem - 32px);margin-inline:auto}.listen-bar-row{justify-content:space-between;align-items:center;gap:8px;min-height:56px;display:flex}.listen-group{align-items:center;gap:8px;display:flex}.listen-bar button{min-width:var(--touch);height:var(--touch);background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);color:var(--ink);font:500 var(--text-label) / 1 var(--font-ui);font-variant-numeric:tabular-nums;cursor:pointer;transition:border-color var(--duration-state) var(--ease-standard), transform var(--duration-press) var(--ease-out);place-items:center;padding:0;display:grid}.listen-bar button:hover{border-color:var(--ink-3)}.listen-bar button:active{transform:scale(.95)}.listen-bar button.listen-play{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}.listen-bar button.listen-play:hover{filter:brightness(1.08)}.listen-bar button[aria-disabled=true]{color:var(--ink-3);opacity:.45;cursor:default}.listen-bar button[aria-disabled=true]:hover{border-color:var(--line)}.listen-notice{color:var(--ink-2);font-size:var(--text-caption);padding-top:6px}@media (width>=881px){.article .listen-bar-row,.article .listen-notice{max-width:calc(40rem - 48px)}}@media (width>=1001px){.game .listen-bar{grid-template-columns:var(--board-size) minmax(0, var(--text-column));justify-content:center;column-gap:var(--game-gap);padding-inline:var(--game-gutter);display:grid}.game .listen-bar>*{grid-column:2;width:100%;max-width:none}}.listen-anchor{position:relative}.listen-bar button.listen-settings-button{gap:4px;padding-inline:10px;display:flex}.listen-panel{background:var(--panel);border:1px solid var(--line);border-radius:8px;width:min(23rem,100vw);max-height:min(60dvh,28rem);padding:8px 12px 12px;position:absolute;bottom:calc(100% + 12px);right:0;overflow-y:auto}.listen-section h3{color:var(--ink);font:600 var(--text-label) / 1.2 var(--font-ui);padding:8px 0 6px}.listen-chips{flex-wrap:wrap;gap:4px;display:flex}.listen-bar button.listen-chip{flex:1 1 var(--touch);font-size:var(--text-small);padding-inline:2px}.listen-bar button.listen-chip[aria-checked=true],.listen-bar button.listen-voice[aria-checked=true]{background:var(--line);border-color:var(--line);color:var(--ink);font-weight:600}.listen-region{color:var(--ink-3);font-size:var(--text-small);padding:8px 0 2px}.listen-bar button.listen-voice{width:100%;height:auto;min-height:var(--touch);text-align:left;border-color:#0000;justify-content:space-between;gap:12px;padding:8px 12px;display:flex}.listen-bar button.listen-voice:hover{background:var(--ground)}.listen-voice-name{text-overflow:ellipsis;white-space:nowrap;min-width:0;overflow:hidden}@media (width<=699px){.listen-anchor{position:static}.listen-panel{width:auto;padding-inline:max(12px, env(safe-area-inset-left,0px));border-width:1px 0;border-radius:0;bottom:calc(100% + 1px);left:0}}.listen-action{flex-wrap:wrap;align-items:center;gap:4px 12px;display:flex}.listen-button[aria-pressed=true]{background:var(--accent-wash);border-color:var(--accent-wash);color:var(--accent);font-weight:600}.listen-button[aria-disabled=true]{color:var(--ink-3);cursor:default}.listen-button[aria-disabled=true]:hover{border-color:var(--line)}.listen-button[aria-disabled=true]:active{transform:none}.listen-note{color:var(--ink-3);font-size:var(--text-caption)}.brand{min-height:var(--touch);color:var(--ink);-webkit-tap-highlight-color:transparent;align-items:center;gap:10px;text-decoration:none;display:inline-flex}.brand-mark{transition:transform var(--duration-press) var(--ease-out);border-radius:22.5%;flex:none;display:block}@media (prefers-reduced-motion:no-preference){.brand:active .brand-mark{transform:scale(.94)}}.brand-word{font:600 1.1875rem / 1 var(--font-display);letter-spacing:-.01em;white-space:nowrap}.brand-word-chess{color:var(--accent)}.sound-toggle{width:var(--bar-control);height:var(--bar-control);background:var(--panel);border:1px solid var(--line);color:var(--ink-2);cursor:pointer;transition:border-color var(--duration-state) var(--ease-standard), color var(--duration-state) var(--ease-standard);border-radius:8px;flex:none;place-items:center;padding:0;display:grid;position:relative}.sound-toggle:after{content:"";inset:calc((var(--bar-control) - var(--touch)) / 2);position:absolute}.sound-toggle[aria-pressed=false]{color:var(--ink-3)}.sound-toggle:hover{border-color:var(--ink-3);color:var(--ink)}.sound-toggle svg{transition:transform var(--duration-press) var(--ease-out)}@media (prefers-reduced-motion:no-preference){.sound-toggle:active svg{transform:scale(.86)}}.theme-toggle{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:2px;display:inline-flex}.theme-toggle button{width:40px;height:calc(var(--bar-control) - 6px);color:var(--ink-3);cursor:pointer;transition:background-color var(--duration-state) var(--ease-standard), color var(--duration-state) var(--ease-standard);background:0 0;border:0;border-radius:5px;place-items:center;padding:0;display:grid;position:relative}.theme-toggle button:after{content:"";inset:calc((var(--bar-control) - 6px - var(--touch)) / 2) 0;position:absolute}.theme-toggle button:hover{color:var(--ink)}.theme-toggle button[aria-pressed=true]{background:var(--line);color:var(--ink)}.theme-toggle svg{transition:transform var(--duration-press) var(--ease-out)}@media (prefers-reduced-motion:no-preference){.theme-toggle button:active svg{transform:scale(.86)}}@media (pointer:coarse){.theme-toggle button{width:var(--touch)}}:root{--bar-h:56px;--bar-control:40px}.app-bar{--column:40rem;--column-inset:16px;--gutter:16px;justify-content:space-between;align-items:center;gap:0 var(--space-md);min-height:var(--bar-h);padding-inline:max(var(--gutter), calc((100% - var(--column)) / 2 + var(--column-inset)));background:var(--ground);border-bottom:1px solid var(--line);flex-wrap:wrap;display:flex}.app-bar[data-width=reading]{--column:44rem;--column-inset:24px;--gutter:24px}:root:has(main.article) .app-bar[data-width=reading]{--column:40rem}.app-bar-lead{align-items:center;gap:var(--space-lg);min-width:0;display:flex}.back{min-height:var(--touch);color:var(--ink-2);font-size:var(--text-label);white-space:nowrap;transition:color var(--duration-state) var(--ease-standard);align-items:center;gap:6px;font-weight:500;text-decoration:none;display:inline-flex}.back svg{transition:transform var(--duration-state) var(--ease-out)}.back:hover{color:var(--ink)}@media (prefers-reduced-motion:no-preference){.back:hover svg{transform:translate(-2px)}}.app-bar-end{justify-content:flex-end;align-items:center;gap:var(--space-lg);min-width:0;display:flex}.app-bar-tools,.page-tools{align-items:center;gap:var(--space-sm);display:flex}.app-bar-settings{align-items:center;gap:var(--space-xs);display:flex}.modes{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:2px;display:inline-flex}.modes a{min-width:88px;min-height:calc(var(--bar-control) - 6px);color:var(--ink-2);font-size:var(--text-label);transition:background-color var(--duration-state) var(--ease-standard), color var(--duration-state) var(--ease-standard);border-radius:5px;place-items:center;font-weight:500;text-decoration:none;display:grid;position:relative}.modes a:after{content:"";inset:calc((var(--bar-control) - 6px - var(--touch)) / 2) 0;position:absolute}.modes a:hover{color:var(--ink)}.modes a[aria-current=page]{background:var(--accent-wash);color:var(--accent);font-weight:600}.app-bar .listen-button,.page-tools .listen-button{min-height:var(--bar-control);padding-block:0;position:relative}.app-bar .listen-button:after,.page-tools .listen-button:after{content:"";inset:calc((var(--bar-control) - var(--touch)) / 2) 0;position:absolute}.page-tools{display:none}@media (width>=1001px){html{scroll-padding-top:calc(var(--bar-h) + 24px)}.app-bar{z-index:30;flex-wrap:nowrap;position:sticky;top:0}.app-bar[data-width=wide]{grid-template-columns:var(--board-size) minmax(0, var(--text-column));justify-content:center;column-gap:var(--game-gap);padding-inline:var(--game-gutter);display:grid}.app-bar[data-width=wide] .app-bar-end{justify-content:space-between}.app-bar-tools,.app-bar .listen-action{flex-wrap:nowrap}.app-bar .listen-note{max-width:22ch;font-size:var(--text-small);line-height:1.2}}@media (width>=1001px) and (width<=1120px),(width<=600px){.app-bar .listen-label{clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.app-bar .listen-button{min-width:var(--touch);padding-inline:0}}@media (width<=1000px){.page-tools{row-gap:var(--space-xs);margin-top:var(--space-md);flex-wrap:wrap;display:flex}:root:has(.page-tools) .app-bar-tools{display:none}.app-bar[data-back] .brand-word{clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.app-bar[data-back] .app-bar-lead{gap:var(--space-md)}html:has(.game-board){scroll-padding-top:calc(42dvh + 24px)}html:has(.game-board[data-hidden=true]){scroll-padding-top:96px}}@media (width<=880px){.app-bar[data-width=reading]{--column-inset:16px;--gutter:16px}}@media (width<=1000px) and (height<=560px) and (orientation:landscape){html:has(.game-board){scroll-padding-top:16px}html:has(.game-board[data-hidden=true]){scroll-padding-top:16px}}@media (width<=600px){.app-bar-end{gap:var(--space-xs)}}:root{--board-coord:1.375rem}@media (width<=1000px){:root{--board-coord:1rem}}.board-frame{grid-template-columns:minmax(0,1fr);grid-template-rows:auto var(--board-coord);display:grid;position:relative}.board-grid{grid-area:1/1}.board-ranks,.board-files{margin:0;padding:0;list-style:none;display:grid}.board-ranks{width:var(--board-coord);grid-area:1/1/2/2;grid-template-rows:repeat(8,1fr);position:absolute;top:0;bottom:0;right:100%}.board-files{grid-area:2/1;grid-template-columns:repeat(8,1fr)}.board-ranks li,.board-files li{color:var(--accent);font:600 12px / 1 var(--font-ui);font-variant-numeric:lining-nums tabular-nums;place-items:center;display:grid}@property --board-last-paint{syntax:"<color>";inherits:false;initial-value:#0000}@keyframes board-last-in{0%{--board-last-paint:transparent}}[data-squares] .square-ref{-webkit-text-decoration:underline dotted color-mix(in oklab, var(--accent) 55%, transparent);text-decoration:underline dotted color-mix(in oklab, var(--accent) 55%, transparent);text-underline-offset:.24em;cursor:pointer;transition:background-color var(--duration-state) var(--ease-standard), text-decoration-color var(--duration-state) var(--ease-standard);border-radius:3px;margin-inline:-.08em;padding-inline:.08em;text-decoration-thickness:1.5px}@media (hover:hover){[data-squares] .square-ref:hover{background-color:var(--highlighter);text-decoration-color:#0000}}@media (width<=1000px) and (not ((height<=560px) and (orientation:landscape))){.game-board[data-hidden=true]+.game-text .square-ref{cursor:auto;text-decoration-line:none}}.train-actions .train-action{font-size:var(--text-caption);gap:6px;padding-inline:10px}@media (width<=480px){.train-action span{clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.train-actions .train-action{min-width:var(--touch);padding-inline:0}}.site-foot{justify-content:space-between;align-items:center;gap:var(--space-xs) var(--space-lg);margin-top:var(--space-2xl);padding-top:var(--space-md);border-top:1px solid var(--line);color:var(--ink-3);font-size:var(--text-caption);flex-wrap:wrap;display:flex}.site-foot-brand{align-items:center;gap:var(--space-xs);font-family:var(--font-display);letter-spacing:-.01em;font-weight:600;display:inline-flex}.site-foot-links{gap:0 var(--space-lg);flex-wrap:wrap;display:flex}.site-foot a{min-height:var(--touch);color:var(--ink-3);text-underline-offset:3px;transition:color var(--duration-state) var(--ease-standard);align-items:center;text-decoration-thickness:1px;display:inline-flex}.site-foot a:hover{color:var(--ink)}.credit-block{color:var(--ink-2);font-size:var(--text-label);margin-top:24px}.credit-block h3{color:var(--ink);font:600 var(--text-title) / 1.25 var(--font-display);letter-spacing:-.01em;margin:0}.credit-block p,.credit-note{max-width:38rem;margin-top:12px}.credit-note{color:var(--ink-3);font-size:var(--text-caption)}.credit-block a{color:var(--ink)}.library-note{max-width:38rem;margin-top:var(--space-sm);color:var(--ink-3);font-size:var(--text-caption);text-wrap:pretty}.button:disabled{opacity:.45;cursor:default}.library-status{min-height:1.5em;margin-top:var(--space-lg);color:var(--ink-2);font-size:var(--text-label)}.library-status p{max-width:38rem}.library-status a{color:var(--ink);text-underline-offset:3px}.library-error{color:var(--warn)}.cover{justify-content:space-between;gap:var(--space-sm);aspect-ratio:2/3;background:var(--cover-bg);color:var(--cover-ink);transition:transform var(--duration-state) var(--ease-out);border-radius:3px 5px 5px 3px;flex-direction:column;padding:12cqi 8cqi 10cqi 12cqi;display:flex;position:relative}.cover:before{content:"";opacity:.2;background:currentColor;width:1px;position:absolute;inset:0 auto 0 6cqi}.cover[data-tone=slate]{--cover-bg:var(--cover-slate);--cover-ink:var(--cover-slate-ink)}.cover[data-tone=steel]{--cover-bg:var(--cover-steel);--cover-ink:var(--cover-steel-ink)}.cover[data-tone=mist]{--cover-bg:var(--cover-mist);--cover-ink:var(--cover-mist-ink)}.cover-title{font-family:var(--font-display);letter-spacing:-.01em;text-wrap:balance;overflow-wrap:break-word;-webkit-hyphens:auto;hyphens:auto;-webkit-line-clamp:6;-webkit-box-orient:vertical;font-size:clamp(.75rem,10.5cqi,1.1875rem);font-weight:600;line-height:1.14;display:-webkit-box;overflow:hidden}.cover-author{font-size:clamp(.75rem,8cqi,.875rem);font-weight:500;line-height:1.25}.cover-ribbon{background:var(--cover-ink);clip-path:polygon(0 0,100% 0,100% 100%,50% 76%,0 100%);width:8cqi;height:14cqi;position:absolute;top:-3cqi;right:12cqi}.home-head{justify-items:start;gap:var(--space-md);display:grid}.home-head h1{letter-spacing:-.022em;max-width:15em;font-weight:450;line-height:1.1}.home-head 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-8px}tr[data-speaking=true]>*{background:var(--accent-wash)}tr[data-speaking=true]>:first-child{border-top-left-radius:var(--radius);border-bottom-left-radius:var(--radius)}tr[data-speaking=true]>:last-child{border-top-right-radius:var(--radius);border-bottom-right-radius:var(--radius)}.move-cell[data-speaking=true]:not([aria-current=step]),.move-table[data-speaking=true]{background:var(--accent-wash)}.game[data-listening=true] .game-text{padding-bottom:calc(60vh + var(--listen-bar-h))}.article[data-listening=true]{padding-bottom:calc(96px + var(--listen-bar-h))}@media (width<=880px){.article[data-listening=true]{padding-bottom:calc(72px + var(--listen-bar-h))}}.row.book-row{grid-template-columns:minmax(0,1fr) auto}.credits{color:var(--ink-2);font-size:var(--text-label);margin-top:56px}.credits p{max-width:38rem;margin-top:12px}.credits a{color:var(--ink)}.book-title{text-wrap:balance;max-width:19em}.book-title-label{display:block}.book-title[data-speaking=true]{isolation:isolate;position:relative}.book-title[data-speaking=true]:before{content:"";z-index:-1;background:var(--accent-wash);border-radius:var(--radius);position:absolute;inset:-3px -8px}.book-title-word{white-space:nowrap}.book-detail,.book-detail>span{column-gap:var(--space-md);flex-wrap:wrap;display:flex}.book-detail{color:var(--ink-2)}.detail-part{white-space:nowrap}.prose :is(h2,h3,h4,h5,h6),.game-text :is(h2,h3,h4,h5,h6){color:var(--ink);font:600 var(--text-head) / 1.3 var(--font-display);font-variant-numeric:lining-nums;letter-spacing:.07em;text-wrap:balance;margin:2em 0 .75em;font-variant-caps:all-small-caps}.prose strong{font-weight:600}.prose figure:not(.book-figure) img{border:1px solid var(--line);border-radius:var(--radius);width:min(100%,26rem);height:auto;margin:0 auto;display:block}.game-text figure{margin:2em 0}.plain-table{border-collapse:collapse;width:100%;font:400 var(--text-label) / 1.4 var(--font-ui);margin:1.5em 0 2em}.plain-table td{border-bottom:1px solid var(--line);overflow-wrap:anywhere;text-align:left;vertical-align:baseline;padding:8px}.board-frame.board-unavailable{aspect-ratio:1;border:1px solid var(--board-edge);border-radius:var(--radius);color:var(--ink-2);text-align:center;grid-template:1fr/1fr;place-items:center;padding:24px;display:grid}.board-unavailable p{max-width:18rem}