:root{color-scheme:light;--ink:#15264b;--muted:#50617c;--blue:#163b8d;--paper:#fffdf8;--ground:#f4f0e7;--line:#a2adbc;--orange:#ffac71;--mint:#bce4bd;--focus:#8b3266;font-family:system-ui,-apple-system,"Segoe UI",sans-serif;color:var(--ink);background:var(--ground)}*{box-sizing:border-box}body{margin:0}button,select{font:inherit;color:inherit}button{min-height:44px;min-width:44px;background:var(--paper);border:1px solid var(--line);border-radius:9px;padding:.6rem .85rem;font-weight:650;cursor:pointer}button:hover:not(:disabled){background:#e6eefc;border-color:var(--blue)}button:disabled{color:#6a7486;background:#e3e4e6;cursor:default}a{color:var(--blue);text-underline-offset:4px}a:hover{color:var(--focus)}:focus-visible{outline:3px solid var(--focus);outline-offset:3px}.skip{position:absolute;top:-80px;left:16px;z-index:10;padding:12px;background:white}.skip:focus{top:10px}header,main,footer{width:min(100% - 40px,1040px);margin-inline:auto}header{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:23px 0}.brand{display:flex;align-items:center;gap:8px;text-decoration:none;font-size:1.3rem;font-weight:800;letter-spacing:-.04em}.brand svg{width:27px;height:27px;fill:var(--blue)}.brand .last{fill:#bf571c}h1{font-size:clamp(1.9rem,4.2vw,2.85rem);line-height:1.1;letter-spacing:-.05em;margin:0;max-width:640px}.heading{display:flex;align-items:center;justify-content:space-between;gap:22px;margin:23px 0}.subtitle{margin:9px 0 0;color:var(--muted)}p{line-height:1.6}.mode{display:flex;gap:4px;flex:none}.mode button{border-color:transparent;background:transparent}.mode button[aria-pressed=true]{background:var(--blue);color:white}.game-toolbar{display:flex;justify-content:space-between;align-items:center;gap:15px;margin:23px 0 17px;font-size:.86rem}.game-toolbar label{display:flex;align-items:center;gap:10px}.game-toolbar select{min-height:44px;max-width:100%;border:1px solid var(--line);border-radius:7px;padding:7px;background:var(--paper)}#session-label{font-variant-numeric:tabular-nums}.game-layout{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(300px,1fr);gap:clamp(28px,4vw,45px);align-items:start}.stats{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:0 0 13px;font-size:.88rem}.stats strong{font-size:1.2rem;font-variant-numeric:tabular-nums}.board{display:grid;grid-template-columns:repeat(var(--size,6),minmax(0,1fr));gap:2px;background:#244168;border:3px solid #244168;border-radius:8px;overflow:hidden;box-shadow:0 7px 0 #cad1db}.board [role=row]{display:contents}.board [role=gridcell]{min-width:0}.square{width:100%;min-width:0;min-height:0;aspect-ratio:1;border:0;border-radius:3px;padding:0;background:#e8edf5;color:var(--blue);font-size:1.1rem;line-height:1;font-weight:800;position:relative}.square[data-filled=true]{background:var(--blue);box-shadow:inset 0 2px 0 #5d80b6,inset 0 -3px 0 #102e6e}.square[data-preview=true]{background:var(--mint);color:#173e28;box-shadow:inset 0 0 0 2px #396c43}.square[data-preview=invalid]{background:#ffd9c9;color:#912c1b;box-shadow:inset 0 0 0 2px #a33727}.square[data-filled=true]:hover:not(:disabled){background:var(--blue)}.square[data-preview=true]:hover:not(:disabled){background:var(--mint)}.square[data-preview=invalid]:hover:not(:disabled){background:#ffd9c9}.square[aria-current=true]{outline:3px solid #b45420;outline-offset:-3px;z-index:1}.square[aria-current=true]::after{content:"";position:absolute;inset:3px;border:2px solid white;pointer-events:none;border-radius:2px}.square:focus-visible{outline:3px solid #923c74;outline-offset:-3px}.square:disabled{opacity:1}.square[data-filled=true]:disabled{background:var(--blue)}#board-help{font-size:.86rem;color:var(--muted);margin:17px 0 0}.play-controls h2{font-size:1rem;margin:0 0 12px}.tray{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:9px}.piece{padding:10px 4px 7px;min-height:100px;display:flex;flex-direction:column;align-items:center;justify-content:space-between;gap:8px;border:2px solid var(--line)}.piece[aria-pressed=true]{border-color:var(--blue);background:#e6eefc;box-shadow:inset 0 0 0 1px var(--blue)}.piece:disabled{border-color:#c4c8ce}.piece-label{font-size:.76rem}.shape{display:grid;grid-template-columns:repeat(4,12px);grid-template-rows:repeat(4,12px);gap:2px;min-height:54px;min-width:54px}.mini{border-radius:2px}.mini[data-on=true]{background:var(--blue);box-shadow:inset 0 1px 0 #5d80b6}.position{margin:16px 0;display:grid;grid-template-columns:150px 1fr;gap:8px 13px;align-items:center}.position p{grid-column:1/-1;font-size:.88rem;min-height:1.6em;margin:0}.dpad{display:grid;grid-template-columns:repeat(3,44px);grid-template-rows:repeat(2,44px);gap:4px}.dpad button{padding:0;font-size:1.3rem}.dpad #up{grid-column:2}.dpad #left{grid-column:1;grid-row:2}.dpad #down{grid-column:2;grid-row:2}.dpad #right{grid-column:3;grid-row:2}.primary{background:var(--blue);color:white;border-color:var(--blue);min-height:60px}.primary:hover:not(:disabled){background:#284e99}.actions{display:flex;gap:7px}.actions button{flex:1;padding:.6rem .45rem}.feedback{font-size:.9rem;min-height:3.2em;margin:16px 0}.play-controls.ended .feedback{font-size:1.3rem;font-weight:750;min-height:0;margin:15px 0}.finish{margin-top:12px}.finish button{background:var(--orange);border-color:#ac612d;width:100%}.text-button{background:transparent}.rules{max-width:740px;margin:37px 0 22px;border-top:1px solid var(--line);padding-top:23px}.rules h2{margin:0;font-size:1.45rem}.rules p{margin:10px 0}.collection{font-size:.84rem;color:var(--muted);max-width:740px}footer{display:flex;gap:24px;border-top:1px solid var(--line);padding:25px 0 35px;margin-top:30px;font-size:.85rem}.notice{background:#fff3d6;border:1px solid #96753f;border-left:4px solid #96753f;padding:14px 16px;margin-bottom:20px}.notice p{margin:0 0 10px}.notice details{margin-top:12px}.notice pre{white-space:pre-wrap;overflow-wrap:anywhere}[hidden]{display:none!important}dialog{max-width:min(460px,calc(100vw - 32px));background:var(--paper);color:var(--ink);border:1px solid var(--line);border-radius:13px;padding:24px}dialog::backdrop{background:#15264baa}dialog h2{margin:0;font-size:1.4rem}.dialog-actions{display:flex;justify-content:flex-end;gap:10px;flex-wrap:wrap}.dialog-actions button:last-child{background:var(--blue);color:white}.guide{max-width:760px}.guide h1{margin-top:23px}.guide h2{margin-top:30px}.guide li{line-height:1.65;margin:9px 0}.play-link{display:inline-flex;align-items:center;min-height:44px;padding:10px 18px;border-radius:9px;background:var(--blue);color:white;text-decoration:none}.play-link:hover{color:white;background:#284e99}.guide svg{display:block;max-width:100%;height:auto;margin:20px 0}.guide table{border-collapse:collapse;width:100%}.guide th,.guide td{border-bottom:1px solid var(--line);text-align:left;padding:9px}@media(max-width:720px){header,main,footer{width:calc(100% - 32px)}header{padding:17px 0}.heading{display:block;margin:18px 0}.mode{margin-top:16px}.game-layout{grid-template-columns:1fr;gap:22px}.board-side,.play-controls{max-width:480px;width:100%;margin-inline:auto}.game-toolbar{display:block}.game-toolbar label{margin-bottom:12px}.game-toolbar select{flex:1;font-size:.82rem}.stats{font-size:.78rem}.stats strong{font-size:1.08rem}.position{grid-template-columns:144px 1fr}.rules{margin-top:27px}.square{font-size:1rem}footer{gap:20px}}@media(prefers-reduced-motion:no-preference){button{transition:background-color .1s ease}}@media(forced-colors:active){.square[data-filled=true]{background:CanvasText}.square[data-preview=true]{outline:2px dashed Highlight}.square[aria-current=true]{outline-color:Highlight}.mini[data-on=true]{background:CanvasText}}