:root{--bg: #080b10;--surface: #111820;--border: #2a3444;--text: #eef3f7;--text-muted: #8793a3;--accent: #7dd3fc;--accent-dim: #38bdf8;--accent-complement: #fca67d;--notes-fg: var(--accent-complement);--notes-border: rgba(252, 166, 125, .5);--notes-bg: rgba(252, 166, 125, .1);--notes-bg-hover: rgba(252, 166, 125, .18);--notes-toggle-bg: rgba(252, 166, 125, .22);--digit-match-fill: rgba(245, 158, 66, .3);--digit-match-ring: rgba(245, 158, 66, .72);--digit-match-selected-fill: rgba(245, 158, 66, .4);--digit-match-selected-ring: rgba(245, 158, 66, .88);--glow: rgba(125, 211, 252, .25);--font-sans: "Manrope", system-ui, sans-serif;--font-mono: "DM Mono", monospace}*,*:before,*:after{box-sizing:border-box}html{font-size:18px;-webkit-text-size-adjust:100%;text-size-adjust:100%}body{margin:0;min-height:100vh;min-height:100dvh;display:flex;flex-direction:column;font-family:var(--font-sans);background:var(--bg);color:var(--text);line-height:1.5;overflow-x:hidden}.sudoku-main{padding-top:1.5rem}.sudoku-game{position:relative;max-width:44rem;margin:0 auto;padding:1.25rem 1.75rem;border:1px solid rgba(42,49,66,.5);border-radius:12px;box-shadow:0 0 0 1px #ffffff0a inset}.sudoku-generating-overlay{position:absolute;top:0;right:0;bottom:0;left:0;z-index:40;display:flex;align-items:center;justify-content:center;border-radius:12px;background:#0d0f14b8;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);pointer-events:all}.sudoku-generating-text{margin:0;font-size:1.1rem;font-weight:600;color:var(--accent);animation:sudoku-generating-pulse 1.1s ease-in-out infinite}@keyframes sudoku-generating-pulse{0%,to{opacity:.65}50%{opacity:1}}.sudoku-toolbar-row{display:flex;flex-wrap:wrap;align-items:center;gap:.75rem;margin-bottom:.5rem}.sudoku-toolbar-row:last-child{margin-bottom:0}.sudoku-toolbar-top{justify-content:space-between;min-height:2.5rem;align-items:center}.sudoku-toolbar-meta{display:flex;align-items:center;gap:.75rem;flex-wrap:wrap;justify-content:flex-end}.sudoku-difficulty-select select{font-family:var(--font-sans);font-size:.9rem;padding:.4rem .6rem;border-radius:8px;border:1px solid var(--border);background:var(--surface);color:var(--text);cursor:pointer}.sudoku-difficulty-badge{font-size:.9rem;color:var(--text-muted);padding:.35rem .6rem;border-radius:6px;background:#ffffff0d;border:1px solid var(--border)}.sudoku-errors{font-size:.9rem;color:var(--text-muted);padding:.35rem .6rem;border-radius:6px;min-width:4.5ch}.sudoku-errors-full{color:#f87171;font-weight:600;background:#f871711f}.sudoku-timer{font-family:var(--font-mono);font-size:1.1rem;font-weight:600;color:var(--accent);min-width:3.5ch}.btn{font-family:var(--font-sans);font-size:.9rem;font-weight:600;padding:.5rem 1rem;border-radius:8px;cursor:pointer;border:1px solid var(--border);background:var(--surface);color:var(--text);transition:border-color .2s,background .2s}.btn:hover:not(:disabled){border-color:var(--accent-dim);background:#38bdf814}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-ghost:focus-visible,.btn-tool:focus-visible,.btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.btn-tool.active{border-color:var(--accent);background:#38bdf826}.btn-primary{background:var(--accent);color:var(--bg);border-color:var(--accent)}.btn-primary:hover:not(:disabled){background:var(--accent-dim);border-color:var(--accent-dim);color:var(--bg)}.btn-secondary{background:transparent;border-color:var(--accent);color:var(--accent)}.sudoku-start-message{margin:0;color:var(--text-muted);font-size:.95rem}.sudoku-game-actions{display:flex;flex-wrap:wrap;align-items:center;justify-content:flex-end;gap:.75rem;margin-top:1rem;min-height:2.5rem;padding:.25rem 0 0}.sudoku-play-area{position:relative;display:flex;flex-direction:row;flex-wrap:wrap;align-items:center;justify-content:center;gap:1.5rem}.sudoku-play-area.paused{pointer-events:none}.sudoku-play-area.paused .sudoku-board-wrap,.sudoku-play-area.lost .sudoku-board-wrap{filter:brightness(.6)}.sudoku-play-area.lost{pointer-events:none}.sudoku-pause-overlay{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1rem;background:#0009;z-index:10;pointer-events:auto}.sudoku-pause-overlay p{margin:0;font-size:1.25rem;font-weight:600;color:var(--text)}.sudoku-board-wrap{display:flex;justify-content:center;flex-shrink:0}.sudoku-play-area.win-ending{pointer-events:none}.sudoku-play-area.win-ending .sudoku-board-wrap{animation:board-celebrate 1.7s cubic-bezier(.16,1,.3,1) forwards}@keyframes board-celebrate{0%{filter:brightness(1);transform:scale(1)}15%{filter:brightness(1.2) saturate(1.08);transform:scale(1.03)}30%{filter:brightness(1.08);transform:scale(1.01)}to{filter:brightness(1);transform:scale(1)}}.sudoku-win-ending{position:absolute;top:50%;left:50%;z-index:12;display:grid;min-width:min(19rem,calc(100% - 2rem));padding:1rem 1.4rem 1.05rem;border:1px solid rgba(125,211,252,.68);border-radius:.42rem;background:linear-gradient(135deg,rgba(125,211,252,.13),transparent 42%),#050b11eb;box-shadow:0 1.4rem 4rem #00000094,0 0 2rem #7dd3fc24;text-align:center;transform:translate(-50%,-50%);animation:sudoku-win-ending-in 2.4s cubic-bezier(.16,1,.3,1) both;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.sudoku-win-ending-kicker{color:var(--accent);font:500 .56rem/1 var(--font-mono);letter-spacing:.16em;text-transform:uppercase}.sudoku-win-ending strong{margin-top:.42rem;color:var(--text);font-size:clamp(1.35rem,4vw,2rem);font-weight:650;letter-spacing:-.045em}@keyframes sudoku-win-ending-in{0%{opacity:0;transform:translate(-50%,-46%) scale(.88)}16%,76%{opacity:1;transform:translate(-50%,-50%) scale(1)}to{opacity:0;transform:translate(-50%,-54%) scale(.98)}}.sudoku-board{display:grid;grid-template-columns:repeat(9,1fr);grid-template-rows:repeat(9,1fr);width:min(92vw,460px);aspect-ratio:1;max-width:100%;border:2px solid var(--border);border-radius:4px;overflow:hidden;background:var(--surface);margin:0 auto}.sudoku-cell{display:flex;align-items:center;justify-content:center;border:1px solid rgba(42,49,66,.6);font-family:var(--font-mono);font-size:clamp(.85rem,3.5vw,1.25rem);font-weight:600;cursor:default;-webkit-user-select:none;user-select:none;transition:background .15s;min-height:0;overflow:hidden}.sudoku-cell.editable{cursor:pointer;-webkit-tap-highlight-color:rgba(125,211,252,.12);touch-action:manipulation}.sudoku-cell.given{color:var(--text)}.sudoku-cell.editable{color:var(--accent)}.sudoku-cell.user-value .cell-value{color:#3095e7;font-weight:700}.sudoku-cell.user-value.peer .cell-value{color:#60a5fa;text-shadow:0 0 1px rgba(0,0,0,.5)}.sudoku-cell.user-value.same-number:not(.conflict) .cell-value{color:#fbbf24;font-weight:700;text-shadow:0 0 1px rgba(0,0,0,.45)}.sudoku-cell.user-value.conflict .cell-value{color:#f87171;font-weight:700}.sudoku-cell.selected{background:#7dd3fc40;outline:2px solid var(--accent);outline-offset:-2px;z-index:1}.sudoku-cell.selected.selected-has-digit:not(.conflict){background:var(--digit-match-selected-fill);outline:2px solid var(--digit-match-selected-ring);outline-offset:-2px}.sudoku-cell.user-value.selected.selected-has-digit:not(.conflict) .cell-value{color:#fcd34d;font-weight:700;text-shadow:0 0 1px rgba(0,0,0,.45)}.sudoku-cell.peer{background:#7dd3fc0f}.sudoku-cell.same-number:not(.conflict){background:var(--digit-match-fill);outline:1px solid var(--digit-match-ring);outline-offset:-1px;z-index:0}.sudoku-cell.same-number.peer:not(.conflict){background:var(--digit-match-fill);outline:1px solid var(--digit-match-ring);outline-offset:-1px}.sudoku-cell.conflict{color:#f87171;background:#f871711f}.sudoku-cell.conflict.selected,.sudoku-cell.same-number.conflict{background:#f8717133}.sudoku-cell.house-celebrate-jackpot{animation:sudoku-house-jackpot .95s cubic-bezier(.33,1,.68,1) both;z-index:3}.sudoku-cell.house-celebrate-row{animation:sudoku-house-row .95s cubic-bezier(.33,1,.68,1) both;z-index:2}.sudoku-cell.house-celebrate-col{animation:sudoku-house-col .95s cubic-bezier(.33,1,.68,1) both;z-index:2}.sudoku-cell.house-celebrate-box{animation:sudoku-house-box .95s cubic-bezier(.33,1,.68,1) both;z-index:2}@keyframes sudoku-house-jackpot{0%{background-color:transparent;box-shadow:inset 0 0 0 0 transparent;filter:brightness(1)}25%{background-color:#7dd3fc52;box-shadow:inset 0 2px #7dd3fce6,inset 2px 0 #fca67dbf,0 0 18px #7dd3fc66;filter:brightness(1.18) saturate(1.12)}55%{background-color:#fca67d38;box-shadow:inset 0 -2px #fca67dbf,inset -2px 0 #7dd3fca6,0 0 14px #fca67d59;filter:brightness(1.12)}to{background-color:transparent;box-shadow:inset 0 0 0 0 transparent;filter:brightness(1)}}@keyframes sudoku-house-row{0%{background-color:transparent;box-shadow:inset 0 0 0 0 transparent;filter:brightness(1)}45%{background-color:#7dd3fc47;box-shadow:inset 0 3px #7dd3fcd9,inset 0 -3px #fca67d8c;filter:brightness(1.12)}to{background-color:transparent;box-shadow:inset 0 0 0 0 transparent;filter:brightness(1)}}@keyframes sudoku-house-col{0%{background-color:transparent;box-shadow:inset 0 0 0 0 transparent;filter:brightness(1)}45%{background-color:#fca67d38;box-shadow:inset 3px 0 #fca67dcc,inset -3px 0 #7dd3fca6;filter:brightness(1.12)}to{background-color:transparent;box-shadow:inset 0 0 0 0 transparent;filter:brightness(1)}}@keyframes sudoku-house-box{0%{background-color:transparent;box-shadow:inset 0 0 0 0 transparent;filter:brightness(1)}35%{background-color:#7dd3fc33;box-shadow:inset 0 0 0 2px #7dd3fcbf,0 0 14px #7dd3fc59;filter:brightness(1.14) saturate(1.08)}65%{background-color:#fca67d24;box-shadow:inset 0 0 0 2px #fca67d8c,0 0 10px #fca67d40;filter:brightness(1.08)}to{background-color:transparent;box-shadow:inset 0 0 0 0 transparent;filter:brightness(1)}}.sudoku-cell .cell-value{display:block}.sudoku-cell .cell-notes{display:grid;grid-template-columns:repeat(3,1fr);grid-template-rows:repeat(3,1fr);gap:0;width:100%;height:100%;min-width:0;min-height:0;padding:1px;font-size:min(.55em,.65rem);line-height:1;color:var(--text-muted);align-items:center;justify-items:center;overflow:hidden;box-sizing:border-box}.sudoku-cell .cell-notes .note-digit{display:flex;align-items:center;justify-content:center;min-width:0;min-height:0;overflow:hidden;line-height:1}.sudoku-cell .note-digit.empty{visibility:hidden}.sudoku-cell:nth-child(3n){border-right-width:2px;border-right-color:var(--accent-dim)}.sudoku-cell:nth-child(n+19):nth-child(-n+27),.sudoku-cell:nth-child(n+46):nth-child(-n+54),.sudoku-cell:nth-child(n+73):nth-child(-n+81){border-bottom-width:2px;border-bottom-color:var(--accent-dim)}.sudoku-number-pad{--numpad-cell: 2.85rem;--numpad-gap: .45rem;--numpad-width: calc(3 * var(--numpad-cell) + 2 * var(--numpad-gap));display:flex;flex-direction:column;align-items:stretch;gap:.75rem;width:var(--numpad-width);flex-shrink:0}.sudoku-number-pad-digits{display:grid;grid-template-columns:repeat(3,var(--numpad-cell));grid-template-rows:repeat(3,var(--numpad-cell));gap:var(--numpad-gap);width:var(--numpad-width);justify-content:center;align-content:center;justify-items:center;align-items:center}.sudoku-number-pad-digits .num-btn{width:var(--numpad-cell);height:var(--numpad-cell);min-width:var(--numpad-cell);min-height:var(--numpad-cell);padding:0;box-sizing:border-box;font-family:var(--font-mono);font-size:1.1rem;font-weight:600;border:1px solid var(--border);border-radius:8px;background:var(--surface);color:var(--text);cursor:pointer;transition:border-color .2s,background .2s,color .2s}.sudoku-number-pad-digits .num-btn:hover:not(:disabled){border-color:var(--accent-dim);background:#38bdf81a}.sudoku-number-pad.sudoku-number-pad-notes-mode .sudoku-number-pad-digits .num-btn{font-style:italic;font-weight:200;color:var(--notes-fg);border-color:var(--notes-border);background:var(--notes-bg)}.sudoku-number-pad.sudoku-number-pad-notes-mode .sudoku-number-pad-digits .num-btn:hover:not(:disabled){border-color:var(--notes-fg);background:var(--notes-bg-hover)}.sudoku-number-pad.sudoku-number-pad-notes-mode .sudoku-number-pad-digits .num-btn.num-btn-complete{color:#fca67d61;border-color:#fca67d38;background:#fca67d0d;opacity:1}.sudoku-number-pad.sudoku-number-pad-notes-mode .sudoku-number-pad-digits .num-btn.num-btn-complete:hover:not(:disabled){color:#fca67d7a;border-color:#fca67d52;background:#fca67d14;opacity:1}.sudoku-number-pad-digits .num-btn.num-btn-complete{background:#ffffff08;border-color:var(--border);color:var(--text-muted);opacity:.7}.sudoku-number-pad-digits .num-btn.num-btn-complete:hover:not(:disabled){background:#ffffff0d;border-color:var(--border);color:var(--text-muted);opacity:.85}.sudoku-number-pad-actions{display:grid;grid-template-columns:1fr 1fr;gap:.5rem;width:var(--numpad-width)}.sudoku-number-pad-actions .num-btn{font-family:var(--font-sans);font-size:.9rem;font-weight:600;padding:.5rem;border:1px solid var(--border);border-radius:8px;background:var(--surface);color:var(--text-muted);cursor:pointer;transition:border-color .2s,background .2s,color .2s;box-sizing:border-box}.sudoku-number-pad-actions .num-btn:hover:not(:disabled){border-color:var(--accent-dim);background:#38bdf81a}.sudoku-number-pad-actions .num-btn.num-btn-notes.active{border-color:var(--notes-fg);background:var(--notes-toggle-bg);color:var(--notes-fg);box-shadow:0 0 0 1px #fca67d26}.sudoku-number-pad.sudoku-number-pad-notes-mode .sudoku-number-pad-actions .num-btn.num-btn-notes.active:hover:not(:disabled){background:#fca67d47;border-color:#fdb491}.sudoku-modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000b3;display:flex;align-items:center;justify-content:center;z-index:100;padding:1rem;box-sizing:border-box}.sudoku-newgame-overlay-after-win{z-index:110}.sudoku-completion-overlay{animation:completion-overlay-in .25s ease-out forwards}.sudoku-completion-overlay .sudoku-modal{animation:completion-modal-in .4s cubic-bezier(.34,1.56,.64,1) forwards}@keyframes completion-overlay-in{0%{opacity:0}to{opacity:1}}@keyframes completion-modal-in{0%{opacity:0;transform:scale(.85)}to{opacity:1;transform:scale(1)}}.sudoku-gameover-overlay{animation:completion-overlay-in .25s ease-out forwards;background:#000c}.sudoku-gameover-overlay .sudoku-modal{animation:gameover-modal-in .5s cubic-bezier(.34,1.56,.64,1) forwards;border-color:#f8717166;box-shadow:0 0 0 1px #f8717133}.sudoku-gameover-title{color:#f87171}@keyframes gameover-modal-in{0%{opacity:0;transform:scale(.9)}15%{transform:scale(1.02)}30%{transform:scale(.98)}to{opacity:1;transform:scale(1)}}.sudoku-confetti-particle{--confetti-rotate: 0deg;--confetti-drift: 0px}@keyframes sudoku-confetti-fall{0%{opacity:1;transform:translateY(0) translate(0) rotate(0)}to{opacity:0;transform:translateY(100vh) translate(var(--confetti-drift)) rotate(var(--confetti-rotate))}}@media (prefers-reduced-motion: reduce){.sudoku-play-area.win-ending .sudoku-board-wrap,.sudoku-win-ending,.sudoku-confetti-particle{animation:none!important}.sudoku-confetti{display:none}}.sudoku-modal{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:1.5rem;width:100%;max-width:min(24rem,90vw)}.sudoku-modal-title{margin:0 0 .5rem;font-size:1.5rem;color:var(--accent)}.sudoku-modal-desc{margin:0 0 1rem;color:var(--text-muted)}.sudoku-completion-stats{display:grid;grid-template-columns:auto 1fr;gap:.25rem 1rem;margin-bottom:1.25rem}.sudoku-completion-stats dt{margin:0;font-size:.85rem;color:var(--text-muted)}.sudoku-completion-stats dd{margin:0;font-weight:600}.sudoku-modal-actions{display:flex;gap:.75rem;flex-wrap:wrap}.sudoku-newgame-difficulties{display:flex;gap:.5rem;margin-bottom:1.25rem;flex-wrap:wrap}.sudoku-stats-table-wrap{margin-bottom:1rem;overflow-x:auto;-webkit-overflow-scrolling:touch;max-width:100%}.sudoku-stats-table{width:100%;min-width:18rem;border-collapse:collapse;font-size:.9rem}.sudoku-stats-table th,.sudoku-stats-table td{padding:.4rem .5rem;text-align:left;border-bottom:1px solid var(--border)}.sudoku-stats-table th{color:var(--text-muted);font-weight:600}.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}@media (max-width: 640px){.sudoku-modal-overlay{align-items:flex-start;padding:max(1rem,env(safe-area-inset-top)) max(1rem,env(safe-area-inset-right)) max(1rem,env(safe-area-inset-bottom)) max(1rem,env(safe-area-inset-left));overflow-y:auto;-webkit-overflow-scrolling:touch;overscroll-behavior:contain}.sudoku-modal{max-height:min(85vh,85dvh,calc(100dvh - 2rem));overflow-y:auto;-webkit-overflow-scrolling:touch;overscroll-behavior:contain;margin-block:auto;flex-shrink:0;max-width:min(24rem,calc(100vw - 2rem))}.sudoku-main{padding-top:1rem;padding-bottom:max(1rem,env(safe-area-inset-bottom))}.sudoku-game{padding:.75rem clamp(.5rem,3vw,1rem);max-width:100%;border-radius:10px}.sudoku-toolbar-top{flex-direction:column;align-items:stretch;gap:.5rem}.sudoku-toolbar-meta{width:100%;justify-content:flex-start;gap:.5rem}.sudoku-toolbar-start{flex-direction:column;align-items:stretch;text-align:center}.sudoku-toolbar-start .btn-primary{width:100%;min-height:48px}.sudoku-play-area{flex-direction:column;gap:1rem;align-items:center}.sudoku-board-wrap{width:100%;max-width:min(460px,calc(100vw - 1.25rem));margin-inline:auto}.sudoku-board{max-width:min(460px,calc(100vw - 1.25rem))}.sudoku-number-pad{--numpad-cell: 3rem;--numpad-gap: .5rem}.sudoku-number-pad-digits .num-btn,.sudoku-number-pad-actions .num-btn{touch-action:manipulation}.sudoku-number-pad-actions .num-btn{min-height:48px;padding:.65rem .5rem}.btn{min-height:44px;padding:.55rem .85rem;touch-action:manipulation}.sudoku-game-actions{justify-content:center;flex-wrap:wrap;gap:.5rem}.sudoku-game-actions .btn-tool,.sudoku-game-actions .btn-ghost{min-height:44px}.sudoku-stats-modal{max-width:calc(100vw - 2rem)}.sudoku-newgame-difficulties{justify-content:center}.sudoku-newgame-difficulties .btn{display:inline-flex;align-items:center;justify-content:center;flex:1 1 auto;min-width:5rem;min-height:44px}.sudoku-modal-actions{flex-direction:column;align-items:stretch}.sudoku-modal-actions .btn{width:100%;min-height:48px}}@media (max-width: 380px){.sudoku-number-pad{--numpad-cell: 2.65rem;--numpad-gap: .4rem}.sudoku-board,.sudoku-board-wrap{max-width:calc(100vw - 1rem)}}.game-page-sudoku{--sudoku-line: rgba(125, 211, 252, .46);--sudoku-panel: rgba(8, 15, 22, .74)}.game-page-sudoku .ambient-grid{background-image:linear-gradient(rgba(125,211,252,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(125,211,252,.035) 1px,transparent 1px)}.sudoku-main{max-width:58rem;padding-top:clamp(.75rem,2vw,1.5rem)}.sudoku-game{max-width:50rem;padding:clamp(1rem,2.5vw,1.5rem);border-radius:.55rem}.sudoku-toolbar{margin-bottom:1rem}.sudoku-toolbar-top{margin-bottom:.75rem;align-items:end;gap:1.25rem}.sudoku-heading-copy{flex:0 0 auto}.game-page-sudoku .game-intro{margin:.45rem 0 0;color:var(--text-muted);font-size:.88rem}.sudoku-new-game-button{flex:0 0 auto;min-width:8.5rem;min-height:2.65rem;border-color:#ff9f788c;color:var(--accent-complement)}.sudoku-game-toolbar{display:grid;grid-template-columns:repeat(3,minmax(5.6rem,1fr)) repeat(3,minmax(5.5rem,auto));overflow:hidden;border:1px solid rgba(255,255,255,.12);border-radius:.42rem;background:linear-gradient(90deg,rgba(125,211,252,.045),transparent 48%),#05090db8;box-shadow:inset 0 0 0 1px #0000004d}.sudoku-stat{display:grid;min-width:0;min-height:3.25rem;padding:.4rem .7rem;align-content:center;border-right:1px solid rgba(255,255,255,.09)}.sudoku-stat:first-child{box-shadow:inset 2px 0 0 var(--accent)}.sudoku-stat-label{color:#718091;font:400 .48rem/1 var(--font-mono);letter-spacing:.1em;text-transform:uppercase}.sudoku-stat-value{margin-top:.25rem;overflow:hidden;color:var(--text);font:500 1rem/1.1 var(--font-mono);text-overflow:ellipsis}.sudoku-timer-value{color:var(--accent)}.sudoku-errors-value.sudoku-errors-full{color:#fca5a5}.sudoku-game-toolbar .sudoku-toolbar-action{min-height:3.25rem;padding-inline:.75rem;border-width:0 0 0 1px;border-color:#ffffff1a;border-radius:0;background:#070c115c}.sudoku-game-toolbar .sudoku-restart-button{border-left-color:#7dd3fc57;color:var(--accent)}.sudoku-game-toolbar .sudoku-toolbar-action:focus-visible{outline-offset:-3px}.sudoku-difficulty-badge,.sudoku-errors,.sudoku-timer{display:inline-flex;min-height:2.35rem;padding:.48rem .68rem;align-items:center;border:1px solid rgba(255,255,255,.12);border-radius:.32rem;background:linear-gradient(90deg,rgba(125,211,252,.05),transparent),#050a0f9e;font-family:var(--font-mono);font-size:.58rem;font-weight:500;letter-spacing:.045em}.sudoku-difficulty-badge,.sudoku-errors{color:#8c99a9}.sudoku-timer{min-width:5.2rem;justify-content:center;border-color:#7dd3fc57;color:var(--accent);font-size:.78rem;box-shadow:inset 2px 0 #7dd3fcb3}.sudoku-errors-full{border-color:#f8717173;background:#f8717114;color:#fca5a5}.btn{min-height:2.35rem;padding:.58rem .82rem;border-color:#ffffff24;border-radius:.32rem;background:linear-gradient(90deg,rgba(125,211,252,.04),transparent),#070c12b3;font-family:var(--font-mono);font-size:.6rem;font-weight:500;letter-spacing:.035em;transition:border-color .2s ease,background .2s ease,color .2s ease,transform .2s ease}.btn:hover:not(:disabled){border-color:#7dd3fca3;background:#7dd3fc17;transform:translateY(-1px)}.btn-primary{border-color:#7dd3fcb8;background:#7dd3fc1a;color:var(--accent);box-shadow:inset 2px 0 0 var(--accent)}.btn-primary:hover:not(:disabled){border-color:var(--accent);background:var(--accent);color:var(--bg)}.btn-secondary{border-color:#ff9f787a;color:var(--accent-complement)}.sudoku-toolbar-start{min-height:3.25rem;margin-top:0;padding:.45rem .55rem .45rem .75rem;justify-content:space-between;border:1px solid rgba(125,211,252,.18);border-radius:.42rem;background:linear-gradient(90deg,rgba(125,211,252,.045),transparent 48%),#05090db8;box-shadow:inset 2px 0 0 var(--accent)}.sudoku-start-message{font-size:.82rem}.sudoku-play-area{gap:clamp(1rem,3vw,1.6rem)}.sudoku-board-wrap{padding:.42rem;border:1px solid rgba(125,211,252,.22);border-radius:.42rem;background:linear-gradient(135deg,rgba(125,211,252,.07),transparent 24%),#04080dd1;box-shadow:0 1.1rem 2.8rem #0000004d}.sudoku-board{border-color:#7dd3fc85;border-radius:.2rem;background:#0e151d;box-shadow:inset 0 0 2rem #0000002e}.sudoku-cell{border-color:#4c60747a;background:#0d141cd6}.sudoku-cell.given{color:#e8eef4}.sudoku-cell.editable{color:#86d9fb}.sudoku-cell.peer{background:#7dd3fc0e}.sudoku-cell.selected{background:#7dd3fc33;outline-width:1px;box-shadow:inset 0 0 0 1px #7dd3fc52}.sudoku-cell:nth-child(3n){border-right-color:#7dd3fc94}.sudoku-cell:nth-child(n+19):nth-child(-n+27),.sudoku-cell:nth-child(n+46):nth-child(-n+54),.sudoku-cell:nth-child(n+73):nth-child(-n+81){border-bottom-color:#7dd3fc94}.sudoku-number-pad{padding-left:clamp(0rem,1vw,.7rem);border-left:1px solid rgba(255,255,255,.08)}.sudoku-number-pad-digits .num-btn,.sudoku-number-pad-actions .num-btn{border-color:#ffffff24;border-radius:.3rem;background:linear-gradient(145deg,rgba(125,211,252,.055),transparent 55%),#090f16e0;box-shadow:inset 0 0 0 1px #0000004d;font-family:var(--font-mono)}.sudoku-number-pad-digits .num-btn:hover:not(:disabled),.sudoku-number-pad-actions .num-btn:hover:not(:disabled){border-color:#7dd3fcad;background:#7dd3fc1c}.sudoku-number-pad-actions .num-btn{font-size:.58rem;letter-spacing:.04em}.sudoku-number-pad-actions{grid-template-columns:repeat(3,1fr)}.sudoku-pause-overlay,.sudoku-generating-overlay{border:1px solid rgba(125,211,252,.25);border-radius:.42rem;background:linear-gradient(rgba(125,211,252,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(125,211,252,.03) 1px,transparent 1px),#03070be6;background-size:2.5rem 2.5rem,2.5rem 2.5rem,auto;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.sudoku-pause-overlay p,.sudoku-generating-text{color:var(--accent);font-family:var(--font-mono);font-size:.68rem;font-weight:500;letter-spacing:.12em;text-transform:uppercase}.sudoku-modal-overlay{display:grid;padding:clamp(.7rem,3vw,1.5rem);place-items:center;background:linear-gradient(rgba(125,211,252,.026) 1px,transparent 1px),linear-gradient(90deg,rgba(125,211,252,.026) 1px,transparent 1px),radial-gradient(circle at 50% 45%,rgba(125,211,252,.1),transparent 36%),#03060ae8;background-size:3rem 3rem,3rem 3rem,auto,auto;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.sudoku-modal{position:relative;width:min(100%,29rem);max-width:none;padding:0;overflow:hidden;border-color:#7dd3fc6b;border-radius:.6rem;background:linear-gradient(135deg,rgba(125,211,252,.08),transparent 21%),linear-gradient(#111820,#0b1118);box-shadow:0 2.5rem 8rem #000000ad,0 0 0 1px #000000a6}.sudoku-modal:before{position:absolute;top:0;left:0;width:28%;height:2px;background:linear-gradient(90deg,var(--accent),transparent);box-shadow:0 0 16px #7dd3fc6b;content:""}.sudoku-modal-topline{display:flex;min-height:2.45rem;padding:.78rem clamp(1rem,4vw,1.55rem) .68rem;align-items:center;justify-content:space-between;gap:1rem;border-bottom:1px solid rgba(255,255,255,.09);color:#718091;font:400 .48rem/1 var(--font-mono);letter-spacing:.1em;text-transform:uppercase}.sudoku-modal-topline span:last-child{color:var(--accent)}.sudoku-modal-title{margin:0;padding:clamp(1.6rem,5vw,2.35rem) clamp(1.1rem,5vw,2rem) 0;color:var(--text);font-size:clamp(1.8rem,6vw,2.65rem);font-weight:650;letter-spacing:-.05em;line-height:.98}.sudoku-modal-desc{margin:0;padding:1rem clamp(1.1rem,5vw,2rem) 0;color:#929ead;font-size:.82rem;line-height:1.62}.sudoku-newgame-difficulties,.sudoku-completion-stats,.sudoku-stats-table-wrap{margin:1.4rem clamp(1.1rem,5vw,2rem) 0}.sudoku-newgame-difficulties{display:grid;grid-template-columns:repeat(3,1fr)}.sudoku-newgame-difficulties .btn[aria-pressed=true]{box-shadow:inset 2px 0 0 var(--accent),0 0 0 1px #7dd3fc1f}.sudoku-modal-actions{display:grid;margin-top:1.4rem;padding:0 clamp(1.1rem,5vw,2rem) clamp(1.2rem,5vw,1.8rem);grid-template-columns:repeat(auto-fit,minmax(7rem,1fr))}.sudoku-modal-actions .btn{min-height:2.8rem}.sudoku-stats-table-wrap{border:1px solid rgba(255,255,255,.1);border-radius:.34rem;background:#05090d85}.sudoku-stats-table{font-family:var(--font-mono);font-size:.63rem}.sudoku-stats-table th,.sudoku-stats-table td{padding:.68rem .62rem;border-bottom-color:#ffffff14}.sudoku-stats-table th{color:#718091;font-size:.48rem;font-weight:400;letter-spacing:.07em;text-transform:uppercase}.sudoku-gameover-overlay .sudoku-modal{border-color:#f8717173}.sudoku-gameover-title{color:#fca5a5}@media (max-width: 640px){.sudoku-modal-overlay{place-items:start center;overflow-y:auto}.sudoku-modal{max-height:min(85vh,85dvh,calc(100dvh - 2rem));margin-block:auto;overflow-y:auto}.sudoku-game{padding:1rem .75rem;border-radius:.45rem}.sudoku-toolbar-top{align-items:stretch}.sudoku-new-game-button{width:100%}.sudoku-game-toolbar{display:grid;grid-template-columns:repeat(3,minmax(0,1fr))}.sudoku-stat{min-width:0;text-align:center}.sudoku-game-toolbar .sudoku-toolbar-action{min-height:3rem;border-top:1px solid rgba(255,255,255,.1)}.sudoku-board-wrap{max-width:min(460px,calc(100vw - 2.25rem));padding:.3rem}.sudoku-board{max-width:min(460px,calc(100vw - 2.85rem))}.sudoku-number-pad{padding-top:.9rem;padding-left:0;border-top:1px solid rgba(255,255,255,.08);border-left:0}.sudoku-modal{max-width:min(29rem,calc(100vw - 1.4rem))}.sudoku-newgame-difficulties,.sudoku-modal-actions{grid-template-columns:1fr}}@media (max-width: 380px){.sudoku-board-wrap{max-width:calc(100vw - 1.75rem)}.sudoku-board{max-width:calc(100vw - 2.35rem)}}