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ripple{0%{opacity:.5;transform:scale(0)}to{opacity:0;transform:scale(4)}}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-6px)}}@keyframes progressGrow{0%{width:0}to{width:var(--w)}}.animate-slide-up{animation:.38s cubic-bezier(.34,1.56,.64,1) both slideUp}.animate-bounce-in{animation:.5s cubic-bezier(.34,1.56,.64,1) both bounceIn}.animate-fade-in{animation:.3s both fadeIn}.animate-float{animation:3s ease-in-out infinite float}.animate-shake{animation:.45s shakeError}.animate-cell-pop{animation:.28s cellPop}.animate-timer-pulse{animation:1s ease-in-out infinite timerPulse}.sudoku-board{border:3px solid var(--border-thick);aspect-ratio:1;border-radius:8px;grid-template-rows:repeat(9,1fr);grid-template-columns:repeat(9,1fr);width:100%;max-width:480px;margin:0 auto;display:grid;overflow:hidden;box-shadow:0 20px 60px #00000080,0 0 0 1px #ffffff0a;direction:ltr!important}.sudoku-cell{background:var(--bg-cell);color:var(--text-given);cursor:pointer;-webkit-user-select:none;user-select:none;border-right:1px solid var(--border-thin);border-bottom:1px solid var(--border-thin);justify-content:center;align-items:center;font-size:clamp(12px,2.4vw,26px);font-weight:700;transition:background .1s,transform 80ms;display:flex;position:relative;overflow:hidden}.sudoku-cell:active{transform:scale(.88)}.sudoku-cell:last-child{border-right:none}.sudoku-cell.box-right{border-right:2px solid var(--border-thick)!important}.sudoku-cell.box-bottom{border-bottom:2px solid var(--border-thick)!important}.sudoku-cell.last-col{border-right:none!important}.sudoku-cell.last-row{border-bottom:none!important}.sudoku-cell.highlighted{background:var(--bg-highlighted)}.sudoku-cell.same-value{background:var(--bg-same)}.sudoku-cell.selected{box-shadow:inset 0 0 0 2px #fff3;background:var(--bg-selected)!important;color:#fff!important}.sudoku-cell.user-number{color:var(--text-user)}.sudoku-cell.error-number{font-weight:800;color:var(--text-error)!important;background:#e0555533!important}.sudoku-cell.duplicate-conflict{color:#ef4444!important;background:#ef44444d!important}.sudoku-cell.given-number{color:var(--text-given);font-weight:800}.sudoku-cell.hint-highlight{animation:1.2s ease-in-out infinite hintPulse}.sudoku-cell.completed-flash{animation:.7s ease-out houseFlash}@keyframes hintPulse{0%,to{background-color:#f59e0b40;box-shadow:inset 0 0 0 2px #f59e0b}50%{background-color:#f59e0b73;box-shadow:inset 0 0 0 4px #fbbf24}}@keyframes houseFlash{0%{background-color:#4caf80d9;transform:scale(1.08)}40%{background-color:#4caf8080;transform:scale(1.03)}to{transform:scale(1)}}.notes-grid{grid-template-rows:repeat(3,1fr);grid-template-columns:repeat(3,1fr);width:100%;height:100%;padding:1px;display:grid}.note-digit{color:var(--text-notes);justify-content:center;align-items:center;font-size:clamp(4px,.8vw,8px);font-weight:600;line-height:1;display:flex}.cell-ripple{pointer-events:none;background:#5c6bc066;border-radius:50%;width:20px;height:20px;margin:-10px;animation:.55s linear forwards ripple;position:absolute}.num-btn{background:var(--bg-card);border:1.5px solid var(--border-thin);cursor:pointer;-webkit-user-select:none;user-select:none;aspect-ratio:1/1.1;border-radius:10px;flex-direction:column;flex:1;justify-content:center;align-items:center;transition:all .15s;display:flex;position:relative;overflow:hidden}.num-btn:hover{background:var(--bg-highlighted);border-color:var(--accent)}.num-btn:active{transform:scale(.88)}.num-btn.done{opacity:.25;cursor:default}.num-btn.note-active{background:#f59e0b14;border-color:#f59e0b}.num-btn .digit{color:var(--text-primary);font-size:clamp(18px,3.5vw,32px);font-weight:800;line-height:1}.num-btn .remain{color:var(--text-secondary);margin-top:2px;font-size:clamp(8px,1vw,11px);font-weight:600}.ctrl-btn{cursor:pointer;-webkit-user-select:none;user-select:none;color:var(--text-secondary);background:0 0;border:none;border-radius:12px;flex-direction:column;flex:1;justify-content:center;align-items:center;gap:5px;padding:10px 8px;transition:all .15s;display:flex}.ctrl-btn:hover{background:var(--bg-highlighted);color:var(--text-primary)}.ctrl-btn:active{transform:scale(.9)}.ctrl-btn.active{color:#f59e0b}.ctrl-btn.disabled{opacity:.25;cursor:default}.ctrl-btn .ctrl-label{text-transform:uppercase;letter-spacing:.5px;font-size:11px;font-weight:600}.diff-item{cursor:pointer;color:var(--text-secondary);-webkit-user-select:none;user-select:none;border-radius:10px;align-items:center;gap:10px;padding:10px 14px;font-size:14px;font-weight:600;transition:all .15s;display:flex}.diff-item:hover{background:var(--bg-highlighted);color:var(--text-primary)}.diff-item.active{background:var(--accent);color:#fff;box-shadow:0 4px 12px var(--accent-glow)}.dark-card{background:var(--bg-card);border:1px solid var(--border-thin);border-radius:14px}.progress-track{background:var(--border-thin);border-radius:999px;width:100%;height:4px;overflow:hidden}.progress-fill{background:linear-gradient(90deg, var(--accent), #7986cb);height:100%;box-shadow:0 0 8px var(--accent-glow);border-radius:999px;transition:width .6s cubic-bezier(.34,1.56,.64,1)}.confetti-piece{z-index:9999;pointer-events:none;border-radius:2px;animation:linear forwards confettiFall;position:fixed}.modal-overlay{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:50;background:#0a0a14bf;justify-content:center;align-items:center;padding:16px;display:flex;position:fixed;inset:0}::-webkit-scrollbar{width:5px}::-webkit-scrollbar-track{background:var(--bg-dark)}::-webkit-scrollbar-thumb{background:var(--border-thick);border-radius:3px}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-gradient-position{syntax:"*";inherits:false}@property --tw-gradient-from{syntax:"<color>";inherits:false;initial-value:#0000}@property --tw-gradient-via{syntax:"<color>";inherits:false;initial-value:#0000}@property --tw-gradient-to{syntax:"<color>";inherits:false;initial-value:#0000}@property --tw-gradient-stops{syntax:"*";inherits:false}@property --tw-gradient-via-stops{syntax:"*";inherits:false}@property --tw-gradient-from-position{syntax:"<length-percentage>";inherits:false;initial-value:0%}@property --tw-gradient-via-position{syntax:"<length-percentage>";inherits:false;initial-value:50%}@property --tw-gradient-to-position{syntax:"<length-percentage>";inherits:false;initial-value:100%}@property --tw-font-weight{syntax:"*";inherits:false}@property --tw-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-shadow-color{syntax:"*";inherits:false}@property --tw-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-inset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-shadow-color{syntax:"*";inherits:false}@property --tw-inset-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-ring-color{syntax:"*";inherits:false}@property --tw-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-ring-color{syntax:"*";inherits:false}@property --tw-inset-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-ring-inset{syntax:"*";inherits:false}@property --tw-ring-offset-width{syntax:"<length>";inherits:false;initial-value:0}@property --tw-ring-offset-color{syntax:"*";inherits:false;initial-value:#fff}@property --tw-ring-offset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-outline-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}@property --tw-backdrop-blur{syntax:"*";inherits:false}@property --tw-backdrop-brightness{syntax:"*";inherits:false}@property --tw-backdrop-contrast{syntax:"*";inherits:false}@property --tw-backdrop-grayscale{syntax:"*";inherits:false}@property --tw-backdrop-hue-rotate{syntax:"*";inherits:false}@property --tw-backdrop-invert{syntax:"*";inherits:false}@property --tw-backdrop-opacity{syntax:"*";inherits:false}@property --tw-backdrop-saturate{syntax:"*";inherits:false}@property --tw-backdrop-sepia{syntax:"*";inherits:false}@property --tw-duration{syntax:"*";inherits:false}@property --tw-scale-x{syntax:"*";inherits:false;initial-value:1}@property --tw-scale-y{syntax:"*";inherits:false;initial-value:1}@property --tw-scale-z{syntax:"*";inherits:false;initial-value:1}@keyframes spin{to{transform:rotate(360deg)}}@keyframes pulse{50%{opacity:.5}}