:root{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--c-bg:#0e1015;--c-bg-inset:#0a0c10;--c-panel:#151922;--c-panel-2:#1b2029;--c-raised:#222833;--c-hover:#2a313e;--c-active:#323a4a;--c-border:#262d3a;--c-border-soft:#1e2531;--c-border-strong:#3a4356;--c-fg:#e7eaf0;--c-fg-muted:#a3abbb;--c-fg-dim:#78808f;--c-fg-faint:#59606d;--c-accent:#c9a24c;--c-accent-soft:#c9a24c26;--c-accent-fg:#1a1608;--c-positive:#4f9d63;--c-positive-hi:#5cb372;--c-info:#4c9de8;--c-info-soft:#4c9de822;--c-danger:#c2504a;--c-danger-hi:#d55f58;--c-warn:#d99a3f;--c-eval-white:#e8ebf1;--c-eval-black:#98a2b4;--c-wdl-win:#e8ebf1;--c-wdl-draw:#7c8698;--c-wdl-loss:#363d4b;--c-hint-base:#27c08a;--c-hint:#4fd6ab;--c-focus:#6fa8f0;--font-ui:ui-sans-serif, -apple-system, "Segoe UI Variable Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--font-mono:ui-monospace, "Cascadia Mono", "Segoe UI Mono", "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;--fs-xs:11px;--fs-sm:12px;--fs-md:13px;--fs-base:14px;--fs-lg:16px;--fs-xl:20px;--fs-2xl:27px;--sp-1:4px;--sp-2:8px;--sp-3:12px;--sp-4:16px;--sp-5:20px;--sp-6:24px;--sp-8:32px;--r-sm:4px;--r-md:7px;--r-lg:11px;--r-xl:16px;--r-pill:999px;--sh-1:0 1px 2px #0006;--sh-2:0 4px 14px -4px #0000008c;--sh-3:0 18px 48px -12px #000000b3;--ease:cubic-bezier(.22, .61, .36, 1);--header-h:52px;--strip-h:52px;--gap:12px;--eval-w:22px;--eval-h:10px;--rail-w:156px;--side-w:clamp(330px, 27vw, 430px)}:root[data-theme=light]{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--c-bg:#eef0f4;--c-bg-inset:#e2e5eb;--c-panel:#fff;--c-panel-2:#f6f7fa;--c-raised:#fff;--c-hover:#eaedf3;--c-active:#dfe4ec;--c-border:#d4d9e2;--c-border-soft:#e3e7ee;--c-border-strong:#b8c0cd;--c-fg:#1b1f27;--c-fg-muted:#4e5665;--c-fg-dim:#6b7484;--c-fg-faint:#8b93a1;--c-accent:#9c7522;--c-accent-soft:#9c752218;--c-accent-fg:#fdf8ec;--c-positive:#3d8250;--c-positive-hi:#468f5a;--c-info:#2b7fd0;--c-info-soft:#2b7fd018;--c-danger:#b03e38;--c-danger-hi:#c04943;--c-warn:#b07721;--c-eval-white:#12161d;--c-eval-black:#6b7484;--c-wdl-win:#3c4351;--c-wdl-draw:#9aa2b0;--c-wdl-loss:#d7dbe2;--c-hint-base:#17a074;--c-hint:#0d6e50;--sh-1:0 1px 2px #0f172a14;--sh-2:0 4px 14px -4px #0f172a29;--sh-3:0 18px 48px -12px #0f172a3d}*,:before,:after{box-sizing:border-box}html,body{height:100%;margin:0;padding:0}body{background:var(--c-bg);color:var(--c-fg);font-family:var(--font-ui);font-size:var(--fs-base);-webkit-font-smoothing:antialiased;text-rendering:optimizelegibility;overscroll-behavior:none;line-height:1.45;overflow:hidden}#root{height:100%}h1,h2,h3,h4,p,figure{margin:0}button,input,select,textarea{font:inherit;color:inherit}button{cursor:pointer;background:0 0;border:none;padding:0}a{color:var(--c-info);text-decoration:none}a:hover{text-decoration:underline}:focus-visible{outline:2px solid var(--c-focus);outline-offset:2px;border-radius:var(--r-sm)}::selection{background:var(--c-accent-soft)}*{scrollbar-width:thin;scrollbar-color:var(--c-border-strong) transparent}::-webkit-scrollbar{width:9px;height:9px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:var(--c-border-strong);border-radius:var(--r-pill);background-clip:content-box;border:2px solid #0000}::-webkit-scrollbar-thumb:hover{background:var(--c-fg-faint);background-clip:content-box}.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}.visually-hidden{clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.eyebrow{font-size:var(--fs-xs);letter-spacing:.09em;text-transform:uppercase;color:var(--c-fg-dim);font-weight:650}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.001ms!important;animation-duration:.001ms!important;animation-iteration-count:1!important}}.app{background:var(--c-bg);height:100dvh;color:var(--c-fg);grid-template-rows:auto minmax(0,1fr);display:grid}.app__top{z-index:3;position:relative}.header{height:var(--header-h)}.app:before{content:"";pointer-events:none;z-index:0;background:radial-gradient(1100px 620px at 28% -8%,#4c9de812,#0000 62%),radial-gradient(900px 560px at 92% 108%,#c9a24c0f,#0000 60%);position:fixed;inset:0}.board-area{z-index:1;--v-avail:calc(100dvh - var(--header-h) - 2 * var(--strip-h) - 4 * var(--gap));--h-avail:calc(100vw - var(--rail-w) - var(--eval-w) - var(--side-w) - 5 * var(--gap) - 20px);--board-size:min(var(--v-avail), var(--h-avail), 880px);grid-template-columns:var(--rail-w) var(--eval-w) var(--board-size) var(--side-w);grid-template-rows:var(--strip-h) var(--board-size) var(--strip-h);place-content:center;gap:var(--gap);padding:var(--gap);grid-template-areas:"rail eval strip-top side""rail eval board side""rail eval strip-bot side";min-height:0;display:grid;position:relative}.left-rail{gap:var(--sp-2);flex-direction:column;grid-area:rail;align-self:stretch;min-width:0;display:flex;overflow:hidden}.eval-bar{grid-area:eval;align-self:stretch}.strip-top{grid-area:strip-top}.strip-bot{grid-area:strip-bot}.board-shell{width:var(--board-size);aspect-ratio:1;grid-area:board;position:relative}.board-mount{width:100%;height:100%}.board-mount cg-container{border-radius:var(--r-md);box-shadow:var(--sh-2), 0 0 0 1px var(--c-border)}.board-mount cg-board{border-radius:var(--r-md)}.board-overlay{pointer-events:none;z-index:5;grid-area:board;position:relative}.sidebar{background:var(--c-panel);border:1px solid var(--c-border);border-radius:var(--r-lg);min-height:0;box-shadow:var(--sh-2);grid-area:side;grid-template-rows:auto minmax(0,1fr) auto;display:grid;overflow:hidden}.sidebar__body{min-height:0;position:relative;overflow:hidden}.sidebar__panel{overscroll-behavior:contain;flex-direction:column;display:flex;position:absolute;inset:0;overflow-y:auto}.sidebar__panel[hidden]{display:none}@media (min-width:1440px){:root{--side-w:clamp(360px, 25vw, 440px);--rail-w:176px}}@media (max-width:1199px){:root{--rail-w:0px}.board-area{--h-avail:calc(100vw - var(--eval-w) - var(--side-w) - 4 * var(--gap) - 20px);grid-template-columns:var(--eval-w) var(--board-size) var(--side-w);grid-template-areas:"eval strip-top side""eval board side""eval strip-bot side"}.left-rail{display:none}}@media (max-width:1023px){.board-area{--board-size:min(calc(100dvh - var(--header-h) - 2 * var(--strip-h) - 260px), calc(100vw - var(--eval-w) - 3 * var(--gap)));grid-template-columns:var(--eval-w) var(--board-size);grid-template-rows:var(--strip-h) var(--board-size) var(--strip-h) minmax(0, 1fr);grid-template-areas:"eval strip-top""eval board""eval strip-bot""side side";align-content:start}.sidebar{min-height:260px}}@media (max-width:767px){:root{--strip-h:46px;--gap:8px}.board-area{--board-size:min(calc(100vw - 2 * var(--gap)), calc(100dvh - var(--header-h) - 330px));grid-template-columns:var(--board-size);grid-template-rows:var(--strip-h) var(--eval-h) var(--board-size) var(--strip-h) minmax(0, 1fr);padding:var(--gap) var(--gap) 0;grid-template-areas:"strip-top""eval""board""strip-bot""side"}.eval-bar{height:var(--eval-h);align-self:auto;width:100%}.sidebar{border-radius:var(--r-lg) var(--r-lg) 0 0;max-height:46dvh}}.header{z-index:3;align-items:center;gap:var(--sp-3);padding:0 var(--sp-4);background:color-mix(in srgb, var(--c-panel) 88%, transparent);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border-bottom:1px solid var(--c-border);display:flex;position:relative}.brand{align-items:baseline;gap:var(--sp-2);margin-right:var(--sp-2);-webkit-user-select:none;user-select:none;display:flex}.brand__mark{font-size:var(--fs-lg);letter-spacing:-.02em;color:var(--c-fg);font-weight:750}.brand__mark span{color:var(--c-accent)}.brand__tag{font-size:var(--fs-xs);letter-spacing:.14em;text-transform:uppercase;color:var(--c-fg-faint)}.header__spacer{flex:auto}.header__group{align-items:center;gap:var(--sp-2);display:flex}.pill{border-radius:var(--r-pill);border:1px solid var(--c-border);background:var(--c-panel-2);height:28px;font-size:var(--fs-sm);color:var(--c-fg-muted);white-space:nowrap;align-items:center;gap:6px;padding:0 10px;font-weight:550;display:inline-flex}.pill[data-state=on]{color:var(--c-fg);border-color:color-mix(in srgb, var(--c-positive) 45%, var(--c-border))}.pill[data-state=off]{color:var(--c-fg-faint);opacity:.75}.pill__dot{background:var(--c-fg-faint);border-radius:50%;flex:none;width:7px;height:7px}.pill[data-state=on] .pill__dot{background:var(--c-positive-hi);box-shadow:0 0 0 3px color-mix(in srgb, var(--c-positive) 25%, transparent)}.pill[data-state=busy] .pill__dot{background:var(--c-accent);animation:pulse 1.1s var(--ease) infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.25}}.btn{border-radius:var(--r-md);border:1px solid var(--c-border);background:var(--c-raised);height:34px;color:var(--c-fg);font-size:var(--fs-md);letter-spacing:.01em;white-space:nowrap;transition:background .12s var(--ease), border-color .12s var(--ease), transform 90ms var(--ease), opacity .12s var(--ease);justify-content:center;align-items:center;gap:7px;padding:0 14px;font-weight:560;display:inline-flex}.btn:hover:not(:disabled){background:var(--c-hover);border-color:var(--c-border-strong)}.btn:active:not(:disabled){transform:translateY(1px)}.btn:disabled{opacity:.42;cursor:not-allowed}.btn--primary{background:var(--c-positive);border-color:color-mix(in srgb, var(--c-positive) 70%, #000);color:#f4fbf5;box-shadow:var(--sh-1)}.btn--primary:hover:not(:disabled){background:var(--c-positive-hi);border-color:var(--c-positive-hi)}.btn--accent{background:var(--c-accent);border-color:color-mix(in srgb, var(--c-accent) 70%, #000);color:var(--c-accent-fg)}.btn--accent:hover:not(:disabled){background:color-mix(in srgb, var(--c-accent) 88%, #fff)}.btn--danger{border-color:color-mix(in srgb, var(--c-danger) 55%, var(--c-border));color:var(--c-danger-hi);background:0 0}.btn--danger:hover:not(:disabled){background:color-mix(in srgb, var(--c-danger) 18%, transparent);border-color:var(--c-danger)}.btn--ghost{color:var(--c-fg-muted);background:0 0;border-color:#0000}.btn--ghost:hover:not(:disabled){background:var(--c-hover);color:var(--c-fg)}.btn--sm{height:28px;font-size:var(--fs-sm);padding:0 10px}.btn--icon{flex:none;width:34px;padding:0}.btn--icon.btn--sm{width:28px}.btn--block{width:100%}.btn--wide{height:40px;font-size:var(--fs-base);font-weight:620}.btn[aria-pressed=true]{background:var(--c-accent-soft);border-color:color-mix(in srgb, var(--c-accent) 45%, var(--c-border));color:var(--c-accent)}.panel{background:var(--c-panel);border:1px solid var(--c-border);border-radius:var(--r-lg);overflow:hidden}.section{padding:var(--sp-4);border-bottom:1px solid var(--c-border-soft);gap:var(--sp-3);flex-direction:column;display:flex}.section:last-child{border-bottom:none}.section__head{justify-content:space-between;align-items:center;gap:var(--sp-2);min-height:20px;display:flex}.section__title{font-size:var(--fs-xs);letter-spacing:.1em;text-transform:uppercase;color:var(--c-fg-dim);font-weight:680}.tabs{padding:var(--sp-2) var(--sp-2) 0;background:var(--c-panel-2);border-bottom:1px solid var(--c-border);align-items:stretch;gap:2px;display:flex}.tab{border-radius:var(--r-sm) var(--r-sm) 0 0;height:34px;color:var(--c-fg-dim);font-size:var(--fs-md);transition:color .12s var(--ease), background .12s var(--ease);flex:1 1 0;font-weight:580;position:relative}.tab:hover{color:var(--c-fg);background:var(--c-hover)}.tab[aria-selected=true]{color:var(--c-fg);background:var(--c-panel)}.tab[aria-selected=true]:after{content:"";background:var(--c-accent);border-radius:2px;height:2px;position:absolute;bottom:-1px;left:12px;right:12px}.strip{align-items:center;gap:var(--sp-3);padding:0 var(--sp-3);background:var(--c-panel);border:1px solid var(--c-border);border-radius:var(--r-md);min-width:0;height:100%;display:flex}.strip[data-turn=true]{border-color:color-mix(in srgb, var(--c-accent) 50%, var(--c-border));box-shadow:inset 0 0 0 1px color-mix(in srgb, var(--c-accent) 22%, transparent)}.strip__avatar{border-radius:var(--r-sm);border:1px solid var(--c-border-strong);flex:none;place-items:center;width:30px;height:30px;font-size:15px;font-weight:700;display:grid}.strip__avatar[data-color=white]{color:#2a2f38;background:linear-gradient(160deg,#fbfbfc,#d9dce2)}.strip__avatar[data-color=black]{color:#e6e9ef;background:linear-gradient(160deg,#3a414e,#1d222b)}.strip__ident{flex-direction:column;justify-content:center;gap:1px;min-width:0;display:flex}.strip__name{font-size:var(--fs-md);white-space:nowrap;text-overflow:ellipsis;font-weight:620;overflow:hidden}.strip__meta{font-size:var(--fs-xs);color:var(--c-fg-dim);white-space:nowrap;text-overflow:ellipsis;overflow:hidden}.strip__spacer{flex:auto}.clock{border-radius:var(--r-md);background:var(--c-bg-inset);border:1px solid var(--c-border);font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:-.01em;color:var(--c-fg-muted);transition:background .16s var(--ease), color .16s var(--ease), border-color .16s var(--ease);flex:none;align-items:baseline;gap:1px;padding:4px 11px;font-size:19px;font-weight:600;display:inline-flex}.clock[data-running=true]{color:var(--c-fg);background:var(--c-raised);border-color:var(--c-border-strong)}.clock[data-low=true]{color:#fff;background:color-mix(in srgb, var(--c-danger) 60%, var(--c-bg-inset));border-color:var(--c-danger)}.clock[data-flagged=true]{opacity:.5}.clock__tenths{opacity:.85;font-size:.72em}.captured{flex-wrap:wrap;align-items:center;gap:2px;min-width:0;display:flex}.captured__group{align-items:center;display:flex}.captured__piece{filter:drop-shadow(0 1px 1px #00000059);width:17px;height:17px;margin-right:-5px}.captured__group .captured__piece:last-child{margin-right:0}.captured__diff{font-size:var(--fs-sm);font-variant-numeric:tabular-nums;color:var(--c-fg-muted);margin-left:7px;font-weight:620}.captured__diff--none{color:var(--c-fg-faint);margin-left:0}.captured--rail{padding:var(--sp-2) var(--sp-2);background:var(--c-panel);border:1px solid var(--c-border);border-radius:var(--r-md);align-content:center;min-height:40px}.rail-card{background:var(--c-panel);border:1px solid var(--c-border);border-radius:var(--r-md);padding:var(--sp-3);flex-direction:column;gap:6px;min-width:0;display:flex}.rail-card__label{font-size:var(--fs-xs);letter-spacing:.09em;text-transform:uppercase;color:var(--c-fg-faint);font-weight:680}.opening__eco{font-family:var(--font-mono);font-size:var(--fs-xs);border-radius:var(--r-sm);background:var(--c-accent-soft);color:var(--c-accent);padding:1px 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10px}.input:hover,.select:hover,.textarea:hover{border-color:var(--c-border-strong)}.input:focus,.select:focus,.textarea:focus{border-color:var(--c-focus);background:var(--c-panel-2);outline:none}.input::placeholder,.textarea::placeholder{color:var(--c-fg-faint)}.select{appearance:none;color:var(--c-fg);background-image:linear-gradient(45deg,#0000 50%,currentColor 50%),linear-gradient(135deg,currentColor 50%,#0000 50%);background-position:calc(100% - 15px) 55%,calc(100% - 10px) 55%;background-repeat:no-repeat;background-size:5px 5px,5px 5px;padding-right:30px}.select:disabled{opacity:.5;cursor:not-allowed}.textarea{font-family:var(--font-mono);font-size:var(--fs-sm);resize:vertical;min-height:96px;line-height:1.55}.segmented{background:var(--c-bg-inset);border:1px solid var(--c-border);border-radius:var(--r-md);gap:3px;padding:3px;display:flex}.segmented__option{border-radius:var(--r-sm);height:28px;font-size:var(--fs-sm);color:var(--c-fg-dim);transition:background .12s var(--ease), 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var(--ease);flex:none;position:relative}.switch__track:after{content:"";background:var(--c-fg-dim);width:16px;height:16px;transition:transform .16s var(--ease), background .14s var(--ease);border-radius:50%;position:absolute;top:2px;left:2px}.switch input{opacity:0;width:0;height:0;position:absolute}.switch input:checked+.switch__track{background:color-mix(in srgb, var(--c-positive) 55%, var(--c-raised));border-color:var(--c-positive)}.switch input:checked+.switch__track:after{background:#f2fbf4;transform:translate(16px)}.switch input:focus-visible+.switch__track{outline:2px solid var(--c-focus);outline-offset:2px}.range{--fill:50%;appearance:none;cursor:pointer;background:0 0;width:100%;height:22px}.range::-webkit-slider-runnable-track{border-radius:var(--r-pill);background:linear-gradient(to right, var(--c-accent) 0 var(--fill), var(--c-raised) var(--fill) 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var(--sp-3);font-size:var(--fs-md);contain:layout paint style;transition:opacity .14s var(--ease), background 90ms var(--ease);grid-template-columns:2.2ch 7ch 4.6ch minmax(0,1fr);align-items:center;gap:6px;display:grid}.pv-row:hover{background:var(--c-hover)}.pv-row[data-stale=true]{opacity:.5}.pv-row[data-empty=true]{opacity:.28}.pv-row__rank{font-family:var(--font-mono);font-size:var(--fs-xs);color:var(--c-fg-faint);text-align:right;font-variant-numeric:tabular-nums}.pv-row__score{font-family:var(--font-mono);font-variant-numeric:tabular-nums;text-align:right;letter-spacing:-.02em;white-space:nowrap;font-weight:680;overflow:hidden}.pv-row__score[data-side=white]{color:var(--c-eval-white)}.pv-row__score[data-side=black]{color:var(--c-eval-black)}.pv-row__score[data-mate=true]{color:var(--c-accent)}.pv-row__depth{font-family:var(--font-mono);font-size:var(--fs-xs);color:var(--c-fg-faint);text-align:right;font-variant-numeric:tabular-nums}.pv-row__moves{white-space:nowrap;align-items:center;gap:1px;min-width:0;display:flex;overflow:hidden;-webkit-mask-image:linear-gradient(90deg,#000 calc(100% - 22px),#0000);mask-image:linear-gradient(90deg,#000 calc(100% - 22px),#0000)}.pv-move{color:var(--c-fg-muted);font-variant-numeric:tabular-nums;white-space:nowrap;transition:background 80ms var(--ease), color 80ms var(--ease);border-radius:3px;padding:1px 3px;font-weight:520}.pv-move:hover{background:var(--c-info-soft);color:var(--c-fg)}.pv-move__num{color:var(--c-fg-faint);font-size:var(--fs-xs);padding-right:2px}.wdl{height:4px;margin:0 var(--sp-3) var(--sp-2);background:var(--c-raised);border-radius:2px;display:flex;overflow:hidden}.wdl__seg{height:100%;transition:width .26s var(--ease)}.wdl__seg[data-part=win]{background:var(--c-wdl-win)}.wdl__seg[data-part=draw]{background:var(--c-wdl-draw)}.wdl__seg[data-part=loss]{background:var(--c-wdl-loss)}.wdl-legend{padding:0 var(--sp-3) var(--sp-2);font-family:var(--font-mono);font-size:var(--fs-xs);color:var(--c-fg-faint);font-variant-numeric:tabular-nums;justify-content:space-between;display:flex}.hint-card{margin:var(--sp-2) var(--sp-3);border-radius:var(--r-md);background:color-mix(in srgb, var(--c-hint-base) 14%, var(--c-panel-2));border:1px solid color-mix(in srgb, var(--c-hint-base) 40%, transparent);flex-direction:column;gap:4px;padding:10px 12px;display:flex}.hint-card__move{font-size:var(--fs-lg);color:var(--c-hint);font-variant-numeric:tabular-nums;font-weight:700}.hint-card__text{font-size:var(--fs-sm);color:var(--c-fg-muted);line-height:1.45}.pgn-actions{gap:var(--sp-2);flex-wrap:wrap;display:flex}.pgn-warning{font-size:var(--fs-xs);color:var(--c-warn);line-height:1.45}.pgn-error{font-size:var(--fs-xs);color:var(--c-danger-hi);line-height:1.45}