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9px;font-size:12px;font-variant-numeric:tabular-nums;color:var(--game-text)}.move-row:nth-child(2n){background:var(--game-raised)}.move-row>span:first-child{color:var(--game-muted)}.captured-pieces{display:flex;justify-content:space-between;font:19px Segoe UI Symbol,serif;min-height:0}.captured-pieces:empty{display:none}.game-actions{display:flex;gap:8px;flex-wrap:wrap;padding-top:5px;justify-content:space-between}.game-actions button{display:inline-flex;align-items:center;gap:4px;border:0;padding:8px 0;background:transparent;color:var(--game-muted);font-size:10px;font-weight:700}.game-actions button:hover{color:var(--game-text)}.game-actions .material-symbols-rounded{font-size:16px}.game-notice{background:#1d2934;border:1px solid #546578;border-radius:3px;padding:12px 14px;font-size:12px;line-height:1.6;margin:10px 0 0;color:#e9eef5}.game-notice.notice-error{background:#34212b;border-color:#a95b6e;color:#ffd0db}.online-intro{font-size:11px;line-height:1.7;color:var(--game-muted);margin:0 0 13px}.join-room{display:grid;grid-template-columns:1fr auto;gap:7px;margin-top:12px}.join-room input{text-transform:uppercase;letter-spacing:1px;font-size:12px;height:40px}.join-room input::placeholder{text-transform:none;letter-spacing:0;color:#a7b3c1;opacity:1}.join-room .game-button{padding:9px;min-height:40px}.online-clock-note{font-size:10px;line-height:1.5;color:var(--game-muted);margin:9px 0}.room-info{margin-top:16px;border-top:1px solid var(--game-line);padding-top:14px;text-align:center}.room-info>span{display:block;font-size:9px;letter-spacing:1px;text-transform:uppercase;color:var(--game-muted)}.room-info strong{display:block;font:600 34px/1.4 var(--font-display,"Sora",sans-serif);letter-spacing:5px;padding:8px;color:#a2c5f2}.connection-status{font-size:11px;line-height:1.7;color:#b8cbdc;margin:12px 0 0;overflow-wrap:anywhere}.connection-error{color:#ffc1cf}[data-draw-offer]{border-top:1px solid var(--game-line);margin-top:8px;padding-top:8px;font-size:12px;line-height:1.5}.promotion-dialog{border:1px solid #627286;border-radius:4px;padding:27px;max-width:440px;width:calc(100% - 32px);color:#eef3f9;background:#141d27;box-shadow:0 24px 100px #0008;font-family:Lato,Arial,sans-serif}.promotion-dialog::backdrop{background:#060c15ba;backdrop-filter:blur(4px)}.promotion-dialog h2{font:600 34px/1 var(--font-display,"Sora",sans-serif);text-transform:uppercase;margin:0 0 12px}.promotion-dialog p{font-size:14px;color:#bcc8d6}.promotion-choices{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin:22px 0}.promotion-choices button{border:1px solid #607186;border-radius:3px;background:#24303e;display:flex;flex-direction:column;align-items:center;gap:6px;color:#f2f5f9;font-size:11px;padding:12px 6px}.promotion-choices button:hover{background:#3568ad;color:#fff;border-color:#3568ad}.promotion-choices button span{font-family:Segoe UI Symbol,serif;font-size:39px}.promotion-cancel{display:block;margin:auto;border:0;background:transparent;color:#bdc9d8;font-size:12px;padding:10px}.puzzle-card h2{font-size:32px;margin-bottom:12px;line-height:1.05}.puzzle-tag{font-size:10px;line-height:1.6;color:#a2c5f2;border-left:2px solid #3568ad;padding:3px 0 3px 10px;margin:0 0 10px}.puzzle-card [data-puzzle-description]{font-size:12px;line-height:1.7;color:var(--game-muted)}.puzzle-progress{display:flex;gap:7px;margin:19px 0;flex-wrap:wrap}.puzzle-progress button{border:1px solid #596878;background:#202a35;border-radius:3px;height:34px;width:34px;color:#c9d4e0;font-size:12px;font-weight:700}.puzzle-progress .puzzle-current{border:2px solid #74a5e6;background:#203754;color:#d2e4ff}.puzzle-progress .puzzle-complete{background:#3568ad;color:#fff;border-color:#3568ad}.puzzle-feedback{font-size:12px;line-height:1.7;margin:12px 0}.puzzle-feedback:empty{display:none}.puzzle-success,.puzzle-hint,.puzzle-try{padding:12px;border-radius:3px;background:#27323e;color:#e2edf9;border-left:2px solid #879caf}.puzzle-try{background:#223247;color:#d5e4f7;border-color:#82a9da}.puzzle-success{background:#1c304a;color:#d8e8fc;border-color:#3568ad}.puzzle-card .game-button+.game-button{margin-top:9px}.chess-app .sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@keyframes thinking-pulse{to{opacity:.3}}@media(prefers-reduced-motion:reduce){.chess-app *{animation:none!important;transition:none!important}}@media(max-width:1050px){.chess-app{padding:24px 20px 48px}.game-layout{gap:16px;grid-template-columns:minmax(0,1fr) 260px}.game-card,.game-view-panel{padding:13px}.board-stage.is-3d{aspect-ratio:1.13}.chess-piece{font-size:clamp(27px,5.5vw,61px)}}@media(max-width:760px){.chess-app{padding:22px 16px 42px}.game-layout{grid-template-columns:minmax(0,1fr);gap:16px}.game-heading{align-items:flex-start;margin-bottom:20px}.game-heading p:not(.game-eyebrow){font-size:13px;line-height:1.6}.game-guide-link{display:none}.game-board-column{width:100%;min-width:0}.board-stage.is-3d{aspect-ratio:1.2}.board-frame{padding:6px 6px 0}.board-frame.has-3d{padding:0}.board-bottom-coordinates{height:20px}.chess-piece{font-size:clamp(29px,9.3vw,67px)}.game-side{display:flex;flex-direction:column;gap:12px;width:100%}.game-card,.game-view-panel{padding:18px}.view-switch button{min-height:47px;font-size:29px}.view-accessibility-note{font-size:10px}.mode-switch button{min-height:43px;font-size:13px}.mode-switch button[data-mode=local]{min-height:32px;font-size:11px}.game-field select,.join-room input{font-size:14px;height:43px}.game-field label{font-size:10px}.game-button{font-size:13px;min-height:46px}.arena-invite-actions button{min-height:42px;font-size:11px}.game-status,.game-actions button{font-size:12px}.game-history summary{font-size:11px}.player-strip{min-height:53px;padding:7px 10px}.game-actions button{min-height:38px}.game-card h2{font-size:29px}}@media(max-width:420px){.board-stage.is-3d{aspect-ratio:1.06}.player-identity strong{font-size:11px}.player-identity div>span{font-size:9px}.player-avatar{width:29px;height:29px}.chess-clock{font-size:23px;min-width:58px;padding:6px}.board-tool-hint{font-size:9px}.rank-coordinate{font-size:8px;left:3px;top:3px}.promotion-dialog{padding:20px}.promotion-choices{gap:6px}}[data-theme=light] .chess-app{--game-bg:#e9edf2;--game-surface:#f8fafc;--game-raised:#e2e8f0;--game-text:#172432;--game-muted:#526173;--game-line:#a9b5c3;color-scheme:light}[data-theme=light] .game-field select,[data-theme=light] .join-room input{background:#fff;color:#152b3e;border-color:#8e9eb0}[data-theme=light] .join-room input::placeholder{color:#536476}[data-theme=light] .connection-status{color:#3f5d77}[data-theme=light] .connection-error{color:#8e2d48}[data-theme=light] .puzzle-tag,[data-theme=light] .room-info strong{color:#285d9f}[data-contrast=high] .chess-app{--game-muted:#e1e8f2;--game-line:#a8b6c9}[data-contrast=high][data-theme=light] .chess-app{--game-muted:#243446;--game-line:#405269}[data-contrast=high] .square-light{background:#f4f2ec}[data-contrast=high] .square-dark{background:#292927}[data-contrast=high] .piece-w{color:#fff;-webkit-text-stroke:1.5px #172d45}[data-contrast=high] .piece-b{color:#0b1a2d;-webkit-text-stroke:1.5px #f3f6fa}[data-contrast=high] .square-selected{outline:4px solid #3568ad;outline-offset:-4px}@media(forced-colors:active){.chess-square{border:1px solid CanvasText}.square-dark{background:GrayText}.chess-piece{-webkit-text-stroke:0}.piece-w{color:Canvas}.piece-b{color:CanvasText}.square-selected{outline:3px solid Highlight}.move-marker{background:Highlight}.game-button{border:1px solid ButtonText}}.piece-art{display:block;width:100%;height:100%;overflow:visible;pointer-events:none;user-select:none;flex-shrink:0;text-shadow:none!important;-webkit-text-stroke:0!important}.chess-piece{display:block;width:91%;height:91%;font-size:0;line-height:0;text-shadow:none!important;-webkit-text-stroke:0!important;filter:drop-shadow(0 2px 1px #17171424);transform-origin:50% 80%}.chess-app[data-board-view="2d"] .game-board-column{max-width:740px;margin-inline:auto}.board-frame:not(.has-3d){--board-light:#d3cfc4;--board-dark:#343432;--coordinate-gutter:28px;display:grid;grid-template-columns:var(--coordinate-gutter) minmax(0,1fr);padding:12px 12px 0 0;background:linear-gradient(135deg,#5a3d2b,#34271e 72%);border:1px solid #80624a;box-shadow:inset 0 1px #d4b99729,0 18px 42px #03070c28;border-radius:4px;max-width:740px}.board-frame:not(.has-3d) .board-stage{grid-column:2;grid-row:1}.board-left-coordinates{display:grid;grid-template-rows:repeat(8,1fr);align-items:center;text-align:center;font:700 10px/1 Lato,Arial,sans-serif;color:#e6dcd0;grid-column:1;grid-row:1}.board-frame.has-3d .board-left-coordinates{display:none}.board-frame:not(.has-3d) .board-stage{box-shadow:0 0 0 1px #211a14,0 3px 9px #0003}.board-frame:not(.has-3d) .chess-grid{background:var(--board-light)}.board-frame:not(.has-3d) .chess-square{transition:background .12s;overflow:visible}.board-frame:not(.has-3d) .square-light{background:var(--board-light)}.board-frame:not(.has-3d) .square-dark{background:var(--board-dark)}.board-frame:not(.has-3d) .chess-square:hover{box-shadow:inset 0 0 0 2px #f1f7ff6b;z-index:1}.board-frame:not(.has-3d) .square-last.square-light{background:#a6c4e8}.board-frame:not(.has-3d) .square-last.square-dark{background:#719bc9}.board-frame:not(.has-3d) .square-last:after{content:"";position:absolute;inset:0;box-shadow:inset 0 0 0 2px #3568ad65;pointer-events:none}.board-frame:not(.has-3d) .square-selected.square-light,.board-frame:not(.has-3d) .square-selected.square-dark{background:#88b5e7;box-shadow:inset 0 0 0 3px #244f86}.board-frame:not(.has-3d) .square-selected .chess-piece{transform:translateY(-3%) scale(1.045);filter:drop-shadow(0 4px 2px #102c4c55)}.board-frame:not(.has-3d) .square-check{background:radial-gradient(ellipse at 50% 48%,#edbbc3,#c97583)!important;box-shadow:inset 0 0 0 3px #942f47}.board-frame:not(.has-3d) .chess-square:focus-visible{outline:3px solid #f5f9ff!important;outline-offset:-3px!important;box-shadow:inset 0 0 0 6px #254d7c;z-index:4}.board-frame:not(.has-3d) .move-marker{width:23%;height:23%;border:2px solid #e5f1ffc2;background:#2c5c96c7;box-shadow:0 1px 3px #10294138}.board-frame:not(.has-3d) .capture-marker{width:91%;height:91%;border:3px solid #244e83;background:transparent;box-shadow:0 0 0 1px #deedff8c inset}.board-frame:not(.has-3d) .board-bottom-coordinates{grid-column:2;grid-row:2;height:27px;font:700 10px/1 Lato,Arial,sans-serif;letter-spacing:.5px;color:#e6dcd0}.captured-pieces{gap:10px;min-height:0;padding:4px 0 7px}.captured-pieces>span{display:flex;align-items:center;flex-wrap:wrap;gap:0;max-width:50%;line-height:0}.captured-pieces>span:last-child{justify-content:flex-end}.captured-pieces .piece-art{width:23px;height:27px;margin-right:-4px;filter:drop-shadow(0 1px 0 #ece8df3d)}.captured-pieces .piece-art-b{filter:drop-shadow(0 0 .7px #dedad0b3)}.promotion-choices button>span{display:block;width:100%;max-width:66px;height:69px;font-size:0;line-height:0}.promotion-choices .piece-art{filter:drop-shadow(0 3px 2px #17171440)}.chess-app .promotion-dialog{margin:auto;border-radius:8px}.promotion-choices .piece-art-b{filter:drop-shadow(0 0 1px #ece8df9c) drop-shadow(0 3px 2px #17171440)}.mini-board.mini-board{border:7px solid #4d3525;box-shadow:0 0 0 1px #80624a,0 10px 24px #0002;background:#d3cfc4}.mini-board>.mini-square{background:#d3cfc4;text-shadow:none!important;-webkit-text-stroke:0!important;font-size:0;position:relative;min-width:0;min-height:0}.mini-board>.mini-square.dark{background:#343432}.mini-board .mini-square>.piece-art{position:absolute;inset:4.5%;width:91%;height:91%;filter:drop-shadow(0 1px 1px #17171426)}@media(max-width:760px){.board-frame:not(.has-3d){--coordinate-gutter:24px;padding:8px 8px 0 0;box-shadow:inset 0 1px #d4b99729,0 9px 25px #03070c28}.board-frame:not(.has-3d) .board-bottom-coordinates{height:24px}.board-frame:not(.has-3d) .square-selected.square-light,.board-frame:not(.has-3d) .square-selected.square-dark{box-shadow:inset 0 0 0 2px #244f86}.board-frame:not(.has-3d) .capture-marker{border-width:2px}.promotion-choices button>span{height:61px}}@media(max-width:380px){.board-frame:not(.has-3d){--coordinate-gutter:22px;padding:6px 6px 0 0}}[data-theme=light] .board-frame:not(.has-3d){background:linear-gradient(135deg,#684932,#402d21);border-color:#92765d}[data-contrast=high] .board-frame:not(.has-3d){--board-light:#f4f2ec;--board-dark:#292927}[data-contrast=high] .board-frame:not(.has-3d) .square-selected{outline:3px solid #173a6c;outline-offset:-3px}@media(forced-colors:active){.piece-art{forced-color-adjust:none}.board-frame:not(.has-3d) .chess-square,.mini-square{forced-color-adjust:none}.board-frame:not(.has-3d) .chess-square:focus-visible{outline-color:Highlight!important}}.chess-app{--control-bg:#111a23;--control-hover:#202e3d;--control-border:#46576b;--control-selected:#213c60;--control-selected-line:#608aca;--control-blue-ink:#b5d1f8;--control-shadow:0 18px 48px #0008,0 2px 8px #0006}.chess-app :is(button,input,select){-webkit-tap-highlight-color:transparent}.chess-app :is(.icon-button,.game-button,.mode-switch button,.view-switch button,.arena-invite-actions button,.game-actions button,.puzzle-progress button){min-height:44px;transition:background-color .16s,border-color .16s,box-shadow .16s,color .16s}.chess-app :is(button,input,select,summary):focus-visible{outline:3px solid #a6cafa;outline-offset:3px}.chess-app :is(button,input):disabled{opacity:.42}.chess-app .game-view-panel,.chess-app .game-card{border-color:var(--game-line);box-shadow:inset 0 1px #ffffff05}.chess-app .view-switch{padding:4px;gap:4px;border:1px solid var(--game-line);border-radius:5px;background:var(--control-bg)}.chess-app .view-switch button{min-height:51px;border:1px solid transparent;border-radius:3px;background:transparent;color:var(--game-muted);gap:8px;font-size:28px}.chess-app .view-switch .view-caption{font-size:9px;letter-spacing:.7px}.chess-app .view-switch button:hover:not(.is-active){background:var(--control-hover);color:var(--game-text)}.chess-app .view-switch button.is-active{border-color:#5889cc;background:linear-gradient(145deg,#3b6daf,#2c548a);color:#fff;box-shadow:inset 0 1px #ffffff25,0 2px 7px #0003}.chess-app .view-accessibility-note{margin-top:10px;font-size:10px;line-height:1.5}.chess-app .mode-switch{gap:5px;margin-bottom:18px}.chess-app .mode-switch button,.chess-app .mode-switch button[data-mode=local]{position:relative;min-height:45px;padding:10px 12px;gap:10px;font-size:12px;line-height:1.3;color:var(--game-muted);border:1px solid transparent;border-radius:4px;background:var(--control-bg)}.chess-app .mode-switch button .material-symbols-rounded,.chess-app .mode-switch button[data-mode=local] .material-symbols-rounded{font-size:20px}.chess-app .mode-switch button:after{content:"";width:12px;height:12px;margin-left:auto;flex:none;border:1px solid var(--control-border);border-radius:50%}.chess-app .mode-switch button:hover:not(.is-active){color:var(--game-text);border-color:var(--control-border);background:var(--control-hover)}.chess-app .mode-switch button.is-active,.chess-app .mode-switch button[data-mode=local].is-active{color:var(--game-text);background:var(--control-selected);border-color:var(--control-selected-line);box-shadow:inset 3px 0 #78a8e5}.chess-app .mode-switch button.is-active .material-symbols-rounded{color:var(--control-blue-ink)}.chess-app .mode-switch button.is-active:after{border:3px solid var(--control-selected);background:#a9caf4;box-shadow:0 0 0 1px #86ade0}.chess-app .game-field{gap:7px;margin-bottom:15px}.chess-app .game-field label{font-size:9px;letter-spacing:1px;line-height:1.4}.chess-app .game-settings-row{gap:10px}.chess-app .arena-select{position:relative;min-width:0}.chess-app .arena-select.is-open{z-index:45}.chess-app .arena-select-trigger{display:flex;align-items:center;gap:10px;width:100%;min-width:0;min-height:55px;padding:11px 12px;border:1px solid var(--control-border);border-radius:4px;background:var(--control-bg);color:var(--game-text);text-align:left;box-shadow:inset 0 1px #ffffff04;transition:background-color .16s,border-color .16s,box-shadow .16s}.chess-app .arena-select-trigger:hover{background:var(--control-hover);border-color:#7288a3}.chess-app .arena-select.is-open .arena-select-trigger{border-color:var(--control-selected-line);box-shadow:0 0 0 2px #5788c51c}.chess-app .arena-select-icon{display:block;width:21px;height:21px;flex:none;color:var(--control-blue-ink)}.chess-app :is(.arena-select-icon,.arena-select-chevron,.arena-select-check) svg{display:block;width:100%;height:100%}.chess-app .arena-select-value{min-width:0;flex:1;display:flex;flex-direction:column;gap:4px}.chess-app .arena-select-value strong,.chess-app .arena-select-option-copy strong{font-size:12px;line-height:1.2;font-weight:800}.chess-app .arena-select-value>span,.chess-app .arena-select-option-copy>span{font-size:10px;line-height:1.2;font-weight:400;color:var(--game-muted)}.chess-app .arena-select-value :is(strong,span){overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.chess-app .arena-select-chevron{display:block;width:17px;height:17px;flex:none;color:var(--game-muted);transition:transform .16s}.chess-app .arena-select.is-open .arena-select-chevron{transform:rotate(180deg)}.chess-app .arena-select-menu{position:absolute;z-index:50;left:0;top:calc(100% + 6px);width:max(100%,220px);max-width:calc(100vw - 48px);max-height:302px;overflow-y:auto;overscroll-behavior:contain;scrollbar-width:thin;scrollbar-color:var(--control-border) transparent;padding:5px;border:1px solid var(--control-border);border-radius:5px;background:var(--game-surface);box-shadow:var(--control-shadow)}.chess-app .arena-select.opens-above .arena-select-menu{top:auto;bottom:calc(100% + 6px)}.chess-app .game-settings-row>.game-field:last-child .arena-select-menu{left:auto;right:0}.chess-app .arena-select-option{display:flex;align-items:center;gap:11px;min-height:52px;padding:9px 10px;border:1px solid transparent;border-radius:3px;cursor:pointer;color:var(--game-text);user-select:none}.chess-app .arena-select-option+.arena-select-option{margin-top:3px}.chess-app .arena-select-option-copy{display:flex;flex-direction:column;gap:4px;min-width:0;flex:1}.chess-app .arena-select-option[aria-selected=true]{background:var(--control-selected)}.chess-app .arena-select-option.is-highlighted{border-color:var(--control-selected-line);background:var(--control-hover)}.chess-app .arena-select-option[aria-selected=true].is-highlighted{background:var(--control-selected)}.chess-app .arena-select-check{display:block;width:17px;height:17px;flex:none;opacity:0;color:var(--control-blue-ink)}.chess-app .arena-select-option[aria-selected=true] .arena-select-check{opacity:1}.chess-app .arena-select-option[aria-disabled=true]{opacity:.4;cursor:not-allowed}.chess-app .arena-select-icon:is(.arena-side-w,.arena-side-b){display:block;width:17px;height:17px;margin-inline:2px;border:1px solid #98a9be;border-radius:50%;font-size:0;box-shadow:inset 0 1px 1px #fff3}.chess-app .arena-side-w{background:linear-gradient(135deg,#fff,#cdd8e5)}.chess-app .arena-side-b{background:linear-gradient(135deg,#53667e,#1c2a3c)}.chess-app .game-settings-row .arena-select-trigger{padding:10px 8px;gap:6px}.chess-app .game-settings-row .arena-select-trigger .arena-select-icon{width:18px;height:18px}.chess-app .game-settings-row .arena-select-trigger .arena-select-icon:is(.arena-side-w,.arena-side-b){width:15px;height:15px;margin-inline:1px;font-size:0}.chess-app .game-settings-row .arena-select-trigger .arena-select-chevron{width:14px;height:14px}.chess-app .game-settings-row .arena-select-value strong{font-size:11px}.chess-app .game-settings-row .arena-select-value>span{font-size:9px}.chess-app .game-button{min-height:46px;padding:12px;border-radius:4px;border-color:#5887c6;background:linear-gradient(145deg,#3c6fb2,#2d588f);color:#fff;box-shadow:inset 0 1px #ffffff1c,0 3px 8px #0002;font-size:12px;font-weight:800}.chess-app .game-button:hover:not(:disabled){background:#4276ba;border-color:#86abe0;box-shadow:inset 0 1px #ffffff30,0 4px 14px #0003}.chess-app .game-start{min-height:49px;letter-spacing:.6px}.chess-app .game-button-secondary{background:var(--control-bg);border-color:var(--control-border);color:var(--game-text);box-shadow:inset 0 1px #ffffff05}.chess-app .game-button-secondary:hover:not(:disabled){background:var(--control-hover);border-color:#738aa7}.chess-app .arena-invite-actions{gap:7px;margin-top:10px}.chess-app .arena-invite-actions button{gap:5px;min-height:44px;padding:8px 5px;font-size:10px;border-radius:4px;border-color:var(--game-line);background:transparent}.chess-app .arena-invite-actions button:hover:not(:disabled){background:var(--control-hover);border-color:var(--control-selected-line)}.chess-app .arena-invite-actions .material-symbols-rounded{font-size:17px;color:var(--control-blue-ink)}.chess-app .join-room{gap:8px;margin-top:14px}.chess-app .join-room input{min-height:46px;height:auto;background:var(--control-bg);border-color:var(--control-border);border-radius:4px;color:var(--game-text);padding:11px 12px;font-size:14px;letter-spacing:2px}.chess-app .join-room input::placeholder{color:var(--game-muted);font-size:12px}.chess-app .join-room .game-button{min-height:46px}.chess-app .room-info{border-top-style:dashed}.chess-app .room-info strong{letter-spacing:6px;color:var(--control-blue-ink)}.chess-app .icon-button{min-width:44px;width:44px;height:44px;border-radius:4px;border-color:var(--control-border);background:var(--control-bg)}.chess-app .icon-button:hover{background:var(--control-hover);border-color:var(--control-selected-line);color:var(--control-blue-ink)}.chess-app .board-tools{gap:8px;padding-block:10px}.chess-app .game-history summary{min-height:44px;display:list-item;padding-block:14px}.chess-app .game-history summary:hover{color:var(--game-text)}.chess-app .move-list{border-color:var(--game-line);padding:4px;max-height:184px}.chess-app .move-row{border-radius:2px;padding:8px 9px;grid-template-columns:30px 1fr 1fr;line-height:1.5}.chess-app .move-row:last-child{background:var(--control-selected);color:var(--game-text)}.chess-app .move-row:last-child>span:first-child{color:var(--control-blue-ink)}.chess-app .game-actions{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:5px;padding-top:9px}.chess-app .game-actions button{justify-content:center;gap:5px;padding:8px 5px;border:1px solid transparent;border-radius:4px;font-size:10px}.chess-app .game-actions button:hover:not(:disabled){background:var(--control-hover);border-color:var(--control-border)}.chess-app .game-actions button[data-action=draw]{grid-column:1 / -1}.chess-app .puzzle-progress{gap:7px}.chess-app .puzzle-progress button{width:44px;min-height:44px;height:44px;border-radius:4px}[data-theme=light] .chess-app{--control-bg:#fff;--control-hover:#edf2f8;--control-border:#8fa0b4;--control-selected:#e1ecfa;--control-selected-line:#527db3;--control-blue-ink:#285d9f;--control-shadow:0 16px 40px #25426724,0 2px 6px #2542671a}[data-theme=light] .chess-app :is(button,input,select,summary):focus-visible{outline-color:#285d9f}[data-theme=light] .chess-app .mode-switch button.is-active:after{background:#3568ad;box-shadow:0 0 0 1px #3568ad}[data-contrast=high] .chess-app{--control-border:#a8b6c9;--control-selected-line:#b5d1f8;--control-blue-ink:#d6e7ff}[data-contrast=high][data-theme=light] .chess-app{--control-border:#405269;--control-selected-line:#1f4f8c;--control-blue-ink:#183f75}[data-contrast=high] .chess-app .arena-select-option.is-highlighted{border-width:2px;padding:8px 9px}@media(max-width:760px){.chess-app .arena-select-trigger{min-height:58px}.chess-app .arena-select-value strong{font-size:13px}.chess-app .game-settings-row .arena-select-value strong{font-size:12px}.chess-app .game-settings-row .arena-select-value>span{font-size:10px}.chess-app .arena-invite-actions button,.chess-app .game-actions button{font-size:11px}.chess-app .join-room input{font-size:16px}}@media(prefers-reduced-motion:reduce){.chess-app :is(.arena-select-trigger,.arena-select-chevron,button,input){transition:none}}@media(forced-colors:active){.chess-app .arena-select-trigger,.chess-app .arena-select-menu,.chess-app .arena-select-option{border-color:ButtonText;background:Canvas;color:CanvasText}.chess-app .arena-select-option.is-highlighted{outline:2px solid Highlight;outline-offset:-3px}.chess-app .arena-select-option[aria-selected=true]{background:Highlight;color:HighlightText}.chess-app .mode-switch button.is-active,.chess-app .view-switch button.is-active{border:2px solid Highlight}}.board-tools .fullscreen-button{width:auto;display:inline-flex;gap:7px;padding:0 12px;min-height:44px;font-size:11px;font-weight:700;white-space:nowrap}.immersive-bar{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:52px;flex-shrink:0;border-bottom:1px solid var(--game-line);margin-bottom:12px;padding-bottom:7px}.immersive-brand{font-size:18px;font-weight:900;letter-spacing:-.6px}.immersive-brand span{color:#6594d0}.immersive-caption{font-size:9px;letter-spacing:2px;color:var(--game-muted);text-transform:uppercase;margin-left:22px}.immersive-exit{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:44px;border:1px solid var(--game-line);background:var(--game-surface);color:var(--game-text);padding:9px 14px;border-radius:6px;font-size:12px;font-weight:700;cursor:pointer}.immersive-exit:hover{background:var(--game-raised);border-color:#6594d0}.immersive-exit kbd{font:10px Lato,sans-serif;padding:3px 5px;border:1px solid var(--game-line);border-radius:3px;color:var(--game-muted)}.chess-app.is-immersive{position:fixed;inset:0;z-index:1000;width:100%;height:100vh;height:100dvh;max-width:none;margin:0;padding:12px 24px 16px;background:var(--game-bg);display:flex;flex-direction:column;overflow:auto;overscroll-behavior:contain}.chess-app.is-immersive::backdrop{background:var(--game-bg)}.is-immersive .game-heading{display:none}.is-immersive .game-layout{flex:1;min-height:0;grid-template-columns:minmax(0,1fr) 310px;gap:26px;width:100%;max-width:calc((100dvh - 255px)*1.22 + 336px);margin-inline:auto}.is-immersive .game-board-column{width:100%;max-width:1180px;margin-inline:auto;align-self:start}.is-immersive[data-board-view="2d"] .game-board-column{max-width:min(100%,calc(100dvh - 280px))}.is-immersive[data-board-view="2d"] .game-layout{max-width:calc(100dvh + 60px)}.is-immersive .board-frame:not(.has-3d){max-width:none}.is-immersive .board-stage.is-3d{height:max(220px,calc(100dvh - 255px));aspect-ratio:auto}.is-immersive .player-strip{min-height:46px;padding-block:5px}.is-immersive .game-side{max-height:100%;overflow:auto;overscroll-behavior:contain;scrollbar-width:thin;scrollbar-color:var(--game-line) transparent;padding:3px 5px 16px 3px}.is-immersive .board-tools{padding-bottom:0}.is-immersive .board-tool-hint{font-size:11px}.is-immersive .game-notice{position:absolute;bottom:20px;left:24px;max-width:min(540px,calc(100% - 48px));z-index:20;box-shadow:0 8px 30px #0004}@media(max-width:760px){.chess-app.is-immersive{padding:0 12px 20px;display:block}.immersive-bar{position:sticky;top:0;z-index:60;background:var(--game-bg);margin-bottom:14px;padding:10px 0;min-height:64px}.immersive-caption,.immersive-exit kbd{display:none}.immersive-brand{font-size:17px}.immersive-exit{font-size:11px;padding:8px 10px}.is-immersive .game-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:16px;max-width:590px}.is-immersive[data-board-view="2d"] .game-board-column{max-width:590px}.is-immersive .board-stage.is-3d{height:auto;aspect-ratio:1.12}.is-immersive .game-side{max-height:none;overflow:visible;padding:0}.is-immersive .board-tool-hint{font-size:9px}.board-tools{gap:8px}.board-tools .fullscreen-button{font-size:10px;padding:0 9px}.is-immersive .game-notice{position:static;max-width:none}}@media(min-width:761px)and (max-height:650px){.is-immersive .game-layout{overflow:auto}.is-immersive[data-board-view="2d"] .game-board-column{max-width:max(280px,calc(100dvh - 220px))}.is-immersive .game-side{max-height:none;overflow:visible}.immersive-bar{min-height:48px;margin-bottom:8px}.is-immersive .board-stage.is-3d{height:max(260px,calc(100dvh - 215px))}}@media(forced-colors:active){.immersive-exit{border-color:ButtonText}.chess-app.is-immersive{background:Canvas}}.chess-app{--table-stage-height:clamp(280px, calc(100svh - 255px) ,680px);--table-stage-width:calc(var(--table-stage-height) * 1.18)}.chess-app .board-tools{gap:8px;padding:6px 8px;flex-wrap:wrap}.chess-app .board-tools .view-switch{display:flex;flex:none;gap:2px;padding:2px;margin:0}.chess-app .board-tools .view-switch button{min-width:44px;min-height:44px;padding:4px 8px;font-size:20px;line-height:1}.chess-app .board-tool-hint{min-width:90px;line-height:1.4}.chess-app .board-tools .fullscreen-button{width:auto}.chess-app .game-options{min-width:0}.chess-app .game-options>summary{display:none}.chess-app:not(.is-immersive) .game-layout{gap:18px;grid-template-columns:minmax(0,var(--table-stage-width)) minmax(270px,320px);max-width:calc(var(--table-stage-width) + 338px);margin-inline:auto}.chess-app:not(.is-immersive) .game-board-column{width:100%;min-width:0}.chess-app:not(.is-immersive) .player-strip{min-height:42px;padding:5px 10px}.chess-app:not(.is-immersive) .player-avatar{width:28px;height:28px}.chess-app:not(.is-immersive) .chess-clock{padding:4px 8px;font-size:23px}.chess-app:not(.is-immersive) .board-stage.is-3d{height:auto;aspect-ratio:1.18;max-height:var(--table-stage-height)}.chess-app:not(.is-immersive)[data-board-view="2d"] .game-board-column{max-width:min(100%,max(310px,calc(100svh - 330px)))}.chess-app:not(.is-immersive) .game-side{gap:10px}.chess-app:not(.is-immersive) .game-card{padding:12px}.chess-app:not(.is-immersive) .game-card-title{margin-bottom:10px}.chess-app .game-session-title{display:flex;align-items:center;justify-content:space-between;gap:8px;min-height:44px;margin-bottom:12px;border-bottom:1px solid var(--game-line)}.chess-app .game-session-title>strong{font-size:12px;line-height:1.4;font-weight:700}.chess-app .game-lobby-link{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:44px;flex:none;padding:8px 3px;color:var(--game-muted);font-size:11px;text-decoration:none}.chess-app .game-lobby-link:hover{color:var(--game-text);text-decoration:underline;text-underline-offset:4px}.chess-app .game-lobby-link>span{color:var(--control-blue-ink);font-size:17px}.chess-app .room-info{margin-top:8px;padding-top:10px}.chess-app .room-info strong{margin-block:8px 12px}.chess-app .online-clock-note{font-size:11px;line-height:1.4;margin:10px 0}.chess-app .connection-status:empty{display:none}.chess-app:not(.is-immersive) .game-field{margin-bottom:10px;gap:5px}.chess-app:not(.is-immersive) .arena-select-trigger{min-height:48px;padding-block:8px}.chess-app:not(.is-immersive) .game-start{min-height:44px;padding:10px}.chess-app:not(.is-immersive) .game-status{margin-block:6px}.chess-app:not(.is-immersive) .game-history summary{padding-block:12px}.chess-app:not(.is-immersive) .game-actions{padding-top:5px}@media(min-width:761px){.chess-app:not(.is-immersive)[data-board-view="3d"] .game-board-column{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}.chess-app:not(.is-immersive)[data-board-view="3d"] .player-strip{grid-row:1}.chess-app:not(.is-immersive)[data-board-view="3d"] .player-strip[data-player=bottom]{border-top:1px solid var(--game-line);border-bottom:0;border-radius:4px 4px 0 0}.chess-app:not(.is-immersive)[data-board-view="3d"] .board-frame{grid-column:1 / -1;grid-row:2;width:100%}.chess-app:not(.is-immersive)[data-board-view="3d"] .board-tools{grid-column:1 / -1;grid-row:3}.chess-app:not(.is-immersive)[data-board-view="3d"] .game-notice{grid-column:1 / -1}.chess-app:not(.is-immersive)[data-board-view="2d"] .game-layout{max-width:max(628px,calc(100svh + 8px));grid-template-columns:minmax(0,1fr) minmax(270px,320px)}.chess-app:not(.is-immersive)[data-board-view="2d"] .board-tool-hint{display:none}.chess-app:not(.is-immersive)[data-board-view="2d"] .board-tools .view-switch{margin-right:auto}}@media(max-width:760px){.chess-app:not(.is-immersive) .game-layout{grid-template-columns:minmax(0,1fr);gap:4px;max-width:480px}.chess-app:not(.is-immersive) .game-side{gap:12px}.chess-app:not(.is-immersive) .board-stage.is-3d{height:auto;aspect-ratio:1.08;max-height:max(230px,calc(100svh - 350px))}.chess-app:not(.is-immersive)[data-game-mode=online] .board-stage.is-3d{max-height:max(220px,calc(100svh - 400px))}.chess-app:not(.is-immersive) .game-board-column{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}.chess-app:not(.is-immersive) .board-frame{grid-column:1 / -1;grid-row:2;width:100%}.chess-app:not(.is-immersive) .board-tools{grid-column:1 / -1;grid-row:3}.chess-app:not(.is-immersive) .game-notice{grid-column:1 / -1}.chess-app:not(.is-immersive)[data-board-view="2d"] .game-board-column{max-width:min(100%,max(250px,calc(100svh - 400px)))}.chess-app:not(.is-immersive) .player-strip{min-height:40px;padding:4px 8px}.chess-app:not(.is-immersive) .player-strip{grid-row:1;gap:5px}.chess-app:not(.is-immersive) .player-avatar{display:none}.chess-app:not(.is-immersive) .player-identity{gap:7px}.chess-app:not(.is-immersive) .player-identity strong{font-size:11px}.chess-app:not(.is-immersive) .player-identity>div{display:flex;align-items:baseline;gap:6px;flex-wrap:wrap}.chess-app:not(.is-immersive) .player-identity [data-player-detail]{display:none}.chess-app:not(.is-immersive) .chess-clock{font-size:19px;min-width:40px;padding:4px}.chess-app .board-tool-hint{display:none}.chess-app .board-tools .view-switch{margin-right:auto}.chess-app .board-tools{gap:6px;padding:4px 0}.chess-app .board-tools .view-switch{padding:0}.chess-app .board-tools .fullscreen-button{padding-inline:10px;gap:5px}.chess-app .board-tools .fullscreen-label{font-size:10px}.chess-app:not(.is-immersive) .setup-card{padding:4px;border-color:transparent;background:transparent;box-shadow:none}.chess-app .game-session-title{margin-bottom:8px}.chess-app [data-local-setup]:not([hidden]){display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.25fr);gap:8px;align-items:start}.chess-app .game-options>summary{display:flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:9px 8px;border:1px solid var(--control-border);border-radius:4px;background:var(--control-bg);color:var(--game-text);font-size:12px;cursor:pointer;list-style:none}.chess-app .game-options>summary::-webkit-details-marker{display:none}.chess-app .game-options>summary:after{content:"\2304";margin-left:auto;font-size:16px}.chess-app .game-options[open]>summary:after{content:"\2303"}.chess-app .game-options>summary .material-symbols-rounded{font-size:18px}.chess-app .game-options[open]{grid-column:1 / -1}.chess-app .game-options-fields{padding-top:12px}.chess-app .game-options[open]+.game-start{grid-column:1 / -1}.chess-app .game-start{min-height:44px;height:44px;letter-spacing:0}.chess-app .online-intro{display:none}.chess-app [data-online-entry]:not([hidden]){display:grid;grid-template-columns:minmax(96px,.82fr) minmax(0,1.45fr);gap:8px;align-items:start}.chess-app [data-online-entry]>[data-action=create]{min-height:46px;padding:8px 6px;font-size:11px;white-space:nowrap}.chess-app [data-online-entry]>[data-action=create] .material-symbols-rounded{display:none}.chess-app .join-room{grid-template-columns:minmax(0,1fr) auto;gap:5px;margin:0}.chess-app .join-room input{padding:10px 7px;font-size:16px;letter-spacing:1px}.chess-app .join-room input::placeholder{font-size:11px}.chess-app .join-room .game-button{padding:8px 7px;font-size:11px}.chess-app .online-clock-note{margin-block:8px 0}.chess-app .room-info:not([hidden]){display:grid;grid-template-columns:minmax(0,1fr) minmax(120px,1.1fr);gap:0 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