*{box-sizing:border-box}body{margin:0;background:#f3f5f8;color:#172f49;font-family:system-ui,sans-serif}header{max-width:850px;margin:auto;padding:24px;display:flex;justify-content:space-between}a{color:inherit;text-decoration:none}select,button{font:inherit;touch-action:manipulation}select{background:transparent;border:0;color:inherit}main{max-width:700px;margin:auto;padding:10px 20px 35px}nav{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:18px}button{cursor:pointer;border:0;border-radius:10px;background:#e6edf4;color:#172f49;padding:12px}button:focus-visible,a:focus-visible,select:focus-visible{outline:3px solid #e2a342;outline-offset:2px}nav button.active,.primary{background:#172f49;color:white}.panel{background:white;border:1px solid #dce3eb;border-radius:22px;padding:26px;text-align:center}h1{font-size:30px;margin:12px 0}p{line-height:1.6;color:#65778a;font-size:14px}#eyebrow{color:#138575;font-size:12px;font-weight:800}#board{display:grid;margin:24px auto;width:min(100%,420px);gap:5px}#board button{aspect-ratio:1;padding:0;min-width:0;font-size:clamp(18px,5vw,27px)}.stats{display:flex;justify-content:space-between;gap:10px;font-size:13px;color:#66778a}#board.sudoku{gap:0;border:2px solid #172f49}#board.sudoku button{border-radius:0;border-right:1px solid #d1dce7;border-bottom:1px solid #d1dce7;background:white;font-size:clamp(17px,4vw,23px)}#board.sudoku .given{background:#edf2f7;font-weight:800}#board.sudoku .selected{background:#c7efdf}#board.sudoku .error{color:#bf3342;background:#fff0f0}#board.sudoku button:nth-child(3n){border-right:2px solid #172f49}#board.sudoku button:nth-child(n+19):nth-child(-n+27),#board.sudoku button:nth-child(n+46):nth-child(-n+54){border-bottom:2px solid #172f49}#controls{display:flex;justify-content:center;gap:5px;flex-wrap:wrap}#controls button{min-width:38px}.matched{background:#d4f3e4!important;color:#0d6f50}.blank{background:#f5f7fa!important}.primary{margin-top:12px;min-width:160px}#storage{font-size:12px}#board.maze{gap:0;background:#edf7f1;border:2px solid #172f49}#board.maze button{border-radius:0;font-size:20px;background:transparent}#board.maze .player{background:#c8efdf}#status{min-height:25px;color:#128263;font-weight:650}@media(max-width:420px){header{padding:18px}main{padding:8px 12px}.panel{padding:17px}nav button{font-size:12px;padding:10px}#controls button{padding:9px;min-width:33px}}