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.2s,box-shadow .2s;box-shadow:0 2px 8px #7c4dff4d}.km-hint-btn:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 4px 14px #7c4dff66}.km-hint-btn:disabled{opacity:.6;cursor:default}.km-ai-nudge{font-size:.9rem;color:#7c4dff;font-weight:500;text-align:center}.km-hint-card{width:100%;padding:14px 18px;background:linear-gradient(135deg,#ede7f6,#e8eaf6);border-radius:14px;border-left:4px solid #7c4dff;overflow:hidden}.km-hint-header{font-size:.9rem;font-weight:700;color:#5e35b1;margin-bottom:6px}.km-hint-text{margin:0;font-size:.95rem;line-height:1.6;color:#333;white-space:pre-wrap}.km-extract-section{width:100%;padding:16px;background:#f3e5f5;border-radius:14px;display:flex;flex-direction:column;gap:10px}.km-extract-title{font-size:1rem;font-weight:600;color:#6a1b9a}.km-extract-inputs{display:flex;align-items:flex-end;gap:10px;flex-wrap:wrap}.km-extract-field{display:flex;flex-direction:column;gap:4px}.km-extract-field label{font-size:.75rem;color:#7b1fa2;font-weight:600}.km-extract-input{width:80px;font-size:1.3rem;padding:8px 12px;border:2px solid #ce93d8;border-radius:10px;text-align:center;font-weight:600;outline:none;transition:border-color .2s}.km-extract-input:focus{border-color:#7b1fa2}.km-extract-input.correct{border-color:#43a047;background:#e8f5e9}.km-extract-input.wrong{border-color:#ef5350;background:#fce4ec}.km-count-section{width:100%;padding:16px;background:linear-gradient(135deg,#e3f2fd,#e8eaf6);border-radius:14px;display:flex;flex-direction:column;align-items:center;gap:10px}.km-count-title{font-size:1rem;font-weight:600;color:#1565c0}.km-count-input-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap;justify-content:center}.km-count-equation{font-size:1.3rem;font-weight:700;color:#1565c0}.km-count-input{width:80px;font-size:1.3rem;padding:8px 12px;border:2px solid #90caf9;border-radius:10px;text-align:center;font-weight:600;outline:none;transition:border-color .2s}.km-count-input:focus{border-color:#1565c0}.km-count-input.correct{border-color:#43a047;background:#e8f5e9}.km-count-input.wrong{border-color:#ef5350;background:#fce4ec}.km-skip-btn{padding:8px 20px;background:none;color:#999;border:1px solid #e0e0e0;border-radius:10px;font-size:.85rem;cursor:pointer;transition:color .2s}.km-skip-btn:hover{color:#42a5f5;border-color:#42a5f5}.km-result-card{position:relative;background:linear-gradient(135deg,#e8f5e9,#c8e6c9);text-align:center}.km-result-emoji{font-size:3rem}.km-result-text{font-size:1.5rem;font-weight:700;color:#2e7d32}.km-confetti{position:absolute;top:50%;left:50%;pointer-events:none}.km-confetti-particle{position:absolute;font-size:1.2rem}.km-logical-section{width:100%;display:flex;flex-direction:column;align-items:center;gap:12px}.km-explain-btn{padding:12px 28px;border-radius:16px;border:none;background:linear-gradient(135deg,#6366f1,#8b5cf6);color:#fff;font-size:1.1rem;font-weight:600;cursor:pointer;transition:transform .15s,box-shadow .15s;box-shadow:0 4px 14px #6366f159}.km-explain-btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 6px 20px #6366f173}.km-explain-btn:disabled{opacity:.7;cursor:not-allowed}.km-llm-explanation{width:100%;background:linear-gradient(135deg,#f0f0ff,#faf5ff);border:2px solid #e0e0ff;border-radius:16px;padding:20px;text-align:left}.km-llm-header{display:flex;justify-content:space-between;align-items:center;font-size:1.1rem;font-weight:700;color:#4f46e5;margin-bottom:14px}.km-llm-actions{display:flex;gap:6px}.km-llm-action-btn{background:#fff;border:1.5px solid #d0d0ff;border-radius:10px;padding:6px 10px;font-size:1rem;cursor:pointer;transition:background .15s,transform .1s}.km-llm-action-btn:hover{background:#eef;transform:scale(1.05)}.km-llm-action-btn.lg{padding:8px 16px;font-size:1rem;display:flex;align-items:center;gap:6px}.km-llm-footer{display:flex;justify-content:center;margin-top:14px}.km-explain-btn-sm{padding:8px 18px;border-radius:12px;border:none;background:linear-gradient(135deg,#6366f1,#8b5cf6);color:#fff;font-size:.9rem;font-weight:600;cursor:pointer;transition:transform .15s}.km-explain-btn-sm:hover:not(:disabled){transform:translateY(-1px)}.km-explain-btn-sm:disabled{opacity:.7;cursor:not-allowed}.km-llm-body{display:flex;flex-direction:column;gap:8px}.km-llm-step{margin:0;padding:8px 12px;background:#fff;border-radius:10px;font-size:1rem;line-height:1.6;color:#333;border-left:3px solid #8b5cf6}.km-solution-overlay{position:fixed;inset:0;background:#000000b3;display:flex;justify-content:center;align-items:center;z-index:2000;padding:16px}.km-solution-modal{background:#fff;border-radius:20px;width:100%;max-width:700px;max-height:90vh;display:flex;flex-direction:column;overflow:hidden;box-shadow:0 20px 60px #0000004d}.km-solution-modal-header{display:flex;justify-content:space-between;align-items:center;padding:18px 22px;background:linear-gradient(135deg,#6366f1,#8b5cf6);color:#fff;font-size:1.2rem;font-weight:700}.km-solution-modal-actions{display:flex;align-items:center;gap:8px}.km-solution-modal-actions .km-llm-action-btn.lg{background:#fff3;border:1.5px solid rgba(255,255,255,.4);color:#fff;font-weight:600}.km-solution-modal-actions .km-llm-action-btn.lg:hover{background:#ffffff59}.km-solution-close-btn{background:#fff3;border:none;color:#fff;font-size:1.3rem;width:36px;height:36px;border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .15s}.km-solution-close-btn:hover{background:#fff6}.km-solution-modal-problem{padding:16px 22px;background:#f8f7ff;border-bottom:1px solid #e8e6f0;font-size:1.1rem;line-height:1.6;color:#444}.km-solution-modal-problem p{margin:0}.km-solution-modal-body{padding:20px 22px;overflow-y:auto;display:flex;flex-direction:column;gap:12px}.km-solution-modal-step{padding:12px 16px;background:linear-gradient(135deg,#f8f7ff,#faf5ff);border-radius:12px;font-size:1.15rem;line-height:1.7;color:#333;border-left:4px solid #8b5cf6}.km-steps-progress-bar{width:100%;height:10px;background:#e8e6f0;border-radius:10px;position:relative;overflow:hidden}.km-steps-progress-fill{height:100%;background:linear-gradient(90deg,#6366f1,#8b5cf6);border-radius:10px;transition:width .4s ease}.km-steps-progress-text{position:absolute;right:8px;top:-18px;font-size:.75rem;color:#7c7c9a;font-weight:600}.km-objects-preview{margin:16px 0;padding:20px;background:linear-gradient(135deg,#fef3c7,#fde68a);border-radius:16px;border:3px dashed #f59e0b;text-align:center}.km-preview-objects{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:8px;margin-bottom:12px}.km-preview-object{font-size:2.2rem;display:inline-block;filter:drop-shadow(0 2px 4px rgba(0,0,0,.15));transition:transform .2s ease}.km-preview-object:hover{transform:scale(1.2)}.km-preview-object-second{opacity:.85}.km-preview-plus{font-size:1.8rem;font-weight:800;color:#059669;margin:0 8px}.km-preview-label{font-size:1.1rem;font-weight:700;color:#92400e;margin-top:8px}.km-mult-preview{margin:16px 0;padding:20px;background:linear-gradient(135deg,#fef3c7,#fde68a);border-radius:16px;border:3px dashed #f59e0b;text-align:center}.km-mult-preview-groups{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;margin-bottom:16px}.km-mult-preview-group{display:flex;flex-direction:column;align-items:center;gap:4px}.km-mult-preview-plate{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:4px;padding:12px 14px;background:linear-gradient(145deg,#fff7ed,#ffedd5);border-radius:50%;border:3px solid #fb923c;min-width:60px;min-height:60px;box-shadow:0 4px 12px #fb923c4d}.km-mult-preview-obj{font-size:1.5rem;filter:drop-shadow(0 2px 2px rgba(0,0,0,.1))}.km-mult-preview-group-label{font-size:.85rem;font-weight:700;color:#c2410c;background:#fff;padding:2px 8px;border-radius:10px}.km-mult-preview-equation{font-size:1.2rem;font-weight:700;color:#92400e;padding:10px 20px;background:#fffc;border-radius:12px;display:inline-block}.km-mult-preview-answer{font-size:1.5rem;font-weight:800;color:#059669;background:#d1fae5;padding:2px 12px;border-radius:8px;margin:0 4px}.km-div-preview{margin:16px 0;padding:20px;background:linear-gradient(135deg,#e0e7ff,#c7d2fe);border-radius:16px;border:2px solid #a5b4fc;text-align:center}.km-div-total{margin-bottom:12px}.km-div-total-label{font-size:1rem;font-weight:700;color:#4338ca;margin-bottom:8px}.km-div-total-items{display:flex;flex-wrap:wrap;justify-content:center;gap:6px;padding:12px;background:#ffffffb3;border-radius:12px;border:2px dashed #818cf8}.km-div-total-obj{font-size:1.4rem;filter:drop-shadow(0 2px 2px rgba(0,0,0,.1))}.km-div-arrow{font-size:1rem;font-weight:600;color:#4338ca;margin:16px 0;padding:8px 16px;background:#fffc;border-radius:20px;display:inline-block}.km-div-groups{display:flex;flex-wrap:wrap;justify-content:center;gap:16px;margin:16px 0}.km-div-group{display:flex;flex-direction:column;align-items:center;gap:6px}.km-div-group-header{font-size:.75rem;font-weight:700;color:#4338ca;background:#c7d2fe;padding:3px 10px;border-radius:8px}.km-div-group-plate{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:4px;min-width:60px;min-height:50px;padding:10px;background:linear-gradient(145deg,#818cf8,#6366f1);border-radius:12px;border:3px solid #4f46e5;box-shadow:0 4px 12px #6366f166}.km-div-group-obj{font-size:1.4rem;filter:drop-shadow(0 2px 2px rgba(0,0,0,.2))}.km-div-group-count{font-size:.9rem;font-weight:800;color:#312e81;background:#e0e7ff;padding:2px 10px;border-radius:10px}.km-div-remainder{margin:16px 0;padding:12px 20px;background:linear-gradient(135deg,#fef3c7,#fde68a);border:2px dashed #f59e0b;border-radius:12px;display:inline-block}.km-div-remainder-label{font-size:.85rem;font-weight:700;color:#b45309;margin-bottom:6px}.km-div-remainder-items{display:flex;justify-content:center;gap:6px}.km-div-remainder-obj{font-size:1.6rem;filter:drop-shadow(0 2px 3px rgba(0,0,0,.15));animation:pulse-remainder 1.5s ease-in-out infinite}@keyframes pulse-remainder{0%,to{transform:scale(1)}50%{transform:scale(1.15)}}.km-div-equation{font-size:1.2rem;font-weight:700;color:#312e81;padding:10px 20px;background:#ffffffd9;border-radius:12px;display:inline-block;margin-top:12px}.km-div-answer{font-size:1.5rem;font-weight:800;color:#059669;background:#d1fae5;padding:2px 12px;border-radius:8px;margin:0 4px}.km-div-remainder-text{font-size:1rem;font-weight:700;color:#b45309;background:#fef3c7;padding:2px 10px;border-radius:8px;margin-left:4px}.km-shapes-comparison{margin:20px 0;padding:24px;background:linear-gradient(135deg,#f0f9ff,#e0f2fe);border-radius:20px;border:3px solid #7dd3fc}.km-shapes-row{display:flex;justify-content:center;gap:24px;flex-wrap:wrap;margin-bottom:16px}.km-shape-item{display:flex;flex-direction:column;align-items:center;gap:8px;padding:16px;background:#fff;border-radius:16px;box-shadow:0 4px 12px #00000014;min-width:100px;transition:transform .2s ease}.km-shape-item:hover{transform:translateY(-4px)}.km-shape-item.km-shape-winner{background:linear-gradient(135deg,#d1fae5,#a7f3d0);border:3px solid #10b981;box-shadow:0 6px 20px #10b98140}.km-shape{width:70px;height:70px;display:flex;align-items:center;justify-content:center}.km-shape-square{width:60px;height:60px;background:linear-gradient(145deg,#f97316,#ea580c);border-radius:4px;box-shadow:0 4px 8px #f973164d}.km-shape-rectangle{width:80px;height:50px;background:linear-gradient(145deg,#8b5cf6,#7c3aed);border-radius:4px;box-shadow:0 4px 8px #8b5cf64d}.km-shape-circle{width:60px;height:60px;background:linear-gradient(145deg,#22c55e,#16a34a);border-radius:50%;box-shadow:0 4px 8px #22c55e4d;animation:gentle-bounce 2s ease-in-out infinite}@keyframes gentle-bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-5px)}}.km-shape-label{font-size:.95rem;font-weight:700;color:#374151}.km-shape-verdict{font-size:.85rem;font-weight:600;padding:4px 10px;border-radius:20px}.km-shape-verdict.km-no{background:#fef2f2;color:#dc2626}.km-shape-verdict.km-yes{background:#dcfce7;color:#16a34a;font-weight:700;font-size:.95rem}.km-shapes-hint{text-align:center;font-size:1.1rem;font-weight:600;color:#0369a1;background:#fff;padding:12px 20px;border-radius:12px;box-shadow:0 2px 8px #0000000d}.km-animated-steps{width:100%;display:flex;flex-direction:column;gap:12px}.km-animated-step-card{display:flex;align-items:flex-start;gap:14px;padding:16px 18px;border-radius:16px;border-left:5px solid;box-shadow:0 4px 12px #00000014;transition:transform .2s ease,box-shadow .2s ease}.km-animated-step-card:hover{transform:translateY(-2px);box-shadow:0 6px 16px #0000001f}.km-step-color-0{background:linear-gradient(135deg,#eef2ff,#e0e7ff);border-color:#6366f1}.km-step-color-1{background:linear-gradient(135deg,#fef3c7,#fde68a);border-color:#f59e0b}.km-step-color-2{background:linear-gradient(135deg,#d1fae5,#a7f3d0);border-color:#10b981}.km-step-color-3{background:linear-gradient(135deg,#fce7f3,#fbcfe8);border-color:#ec4899}.km-step-color-4{background:linear-gradient(135deg,#e0f2fe,#bae6fd);border-color:#0ea5e9}.km-animated-step-number{font-size:1.8rem;flex-shrink:0;filter:drop-shadow(0 2px 2px rgba(0,0,0,.1))}.km-animated-step-content{display:flex;flex-direction:column;gap:8px;flex:1}.km-step-emoji-scene{font-size:1.3rem;letter-spacing:2px;background:#ffffffd9;border-radius:10px;padding:10px 14px;border:2px dashed #d1d5db;word-break:break-word;line-height:2;box-shadow:inset 0 2px 4px #0000000d}.km-animated-step-text{font-size:1.15rem;line-height:1.7;color:#1f2937;font-weight:600}.km-highlight-num{display:inline-block;background:linear-gradient(135deg,#fbbf24,#f59e0b);color:#7c2d12;font-weight:800;padding:0 6px;border-radius:6px;margin:0 2px}.km-steps-controls{display:flex;flex-direction:column;align-items:center;gap:8px}.km-steps-complete{font-size:1.2rem;font-weight:700;color:#2e7d32;background:#e8f5e9;padding:10px 24px;border-radius:14px}.km-steps-actions{display:flex;gap:8px;justify-content:center}.km-col-arith{width:100%;display:flex;flex-direction:column;align-items:center;gap:14px;padding:16px;background:#f9f9f9;border-radius:16px}.km-col-controls{display:flex;align-items:center;gap:8px}.km-col-ctrl-btn{width:36px;height:36px;border:2px solid #e0e0e0;border-radius:10px;background:#fff;cursor:pointer;font-size:1.1rem;display:flex;align-items:center;justify-content:center;transition:border-color .2s}.km-col-ctrl-btn:hover{border-color:#42a5f5}.km-col-step-info{font-size:.8rem;color:#888;font-weight:600}.km-col-grid{display:flex;flex-direction:column;align-items:flex-end;gap:2px;font-family:Courier New,monospace}.km-col-row{display:flex;align-items:center}.km-col-row.km-col-right{justify-content:flex-end}.km-col-cell{width:40px;height:44px;display:flex;align-items:center;justify-content:center;font-size:1.6rem;font-weight:700;color:#333;border-radius:6px;transition:background .3s}.km-col-cell.active{background:#e3f2fd;box-shadow:inset 0 0 0 2px #42a5f5}.km-col-op-cell{color:#e65100;font-size:1.4rem;width:30px}.km-col-carry-row .km-col-cell{height:28px}.km-col-carry-digit{font-size:.85rem;color:#d32f2f;font-weight:800}.km-col-bottom-row{border-bottom:none}.km-col-line{width:100%;height:3px;background:#333;border-radius:2px;margin:2px 0}.km-col-result-row .km-col-cell{color:#2e7d32}.km-col-result{color:#2e7d32;font-weight:800}.km-col-partial{color:#5e35b1;font-size:1.3rem}.km-mul-carry-row .km-col-cell{min-height:20px;padding:0}.km-mul-carry-row .km-col-carry-digit{font-size:.75rem;color:#e65100;font-weight:700}.km-mul-active-row{background:#5e35b10f;border-radius:6px}.km-mul-row-label{font-size:.65rem;color:#94a3b8;white-space:nowrap;padding-left:6px;display:flex;align-items:center}.km-col-borrowed{display:flex;flex-direction:column;align-items:center;line-height:1}.km-col-crossed{font-size:.8rem;color:#bbb;text-decoration:line-through}.km-col-new-digit{font-size:1.3rem;color:#d32f2f;font-weight:800}.km-col-done{padding:8px 20px;background:#e8f5e9;border-radius:12px;color:#2e7d32;font-weight:700;font-size:1.1rem}.km-col-division{display:flex;flex-direction:column;align-items:flex-start;gap:4px;font-family:Courier New,monospace;font-size:1.5rem;font-weight:700;padding:12px 20px}.km-div-quotient{display:flex;gap:4px;margin-left:60px;color:#2e7d32;border-bottom:2px solid #333;padding-bottom:4px;min-height:34px}.km-div-q-digit{width:24px;text-align:center}.km-div-bracket-row{display:flex;align-items:center;gap:2px}.km-div-divisor{color:#1565c0;margin-right:4px}.km-div-bracket{font-size:1.8rem;color:#333}.km-div-dividend{color:#333;border-top:3px solid #333;padding-top:2px;letter-spacing:4px}.km-div-steps{margin-left:60px;display:flex;flex-direction:column;gap:4px}.km-div-substep{display:flex;flex-direction:column;align-items:flex-end;gap:1px}.km-div-bring{color:#333}.km-div-subtract{color:#d32f2f}.km-div-sub-line{width:100%;height:2px;background:#666;margin:2px 0}.km-div-result{color:#5e35b1}.km-col-next-btn{background:#43a047!important;color:#fff!important;font-weight:700;padding:6px 16px!important;font-size:1rem!important;min-width:80px}.km-col-next-btn:disabled{background:#c8e6c9!important;color:#aaa!important}.km-col-explanation{margin-top:12px;padding:10px 16px;background:#e3f2fd;border-radius:12px;font-size:.95rem;color:#1565c0;font-weight:600;line-height:1.5;border-left:4px solid #42a5f5}.km-regroup-box{margin-top:10px;padding:12px 16px;border-radius:14px;display:flex;flex-direction:column;gap:8px;align-items:center}.km-regroup-carry{background:#fff3e0;border:2px solid #ff9800}.km-regroup-borrow{background:#fce4ec;border:2px solid #e91e63}.km-regroup-icon{font-size:1.4rem}.km-regroup-text{font-size:.9rem;font-weight:600;color:#333;text-align:center}.km-regroup-blocks{display:flex;align-items:center;gap:12px}.km-regroup-from,.km-regroup-to{display:flex;gap:3px;flex-wrap:wrap;max-width:120px;justify-content:center}.km-regroup-arrow{font-size:1.4rem;font-weight:700;color:#555}.km-ten-frame-area{display:flex;flex-direction:column;align-items:center;gap:12px;padding:16px}.km-tf-label{font-weight:600;font-size:1rem;color:#5e35b1}.km-ten-frame{display:grid;grid-template-columns:repeat(5,1fr);grid-template-rows:repeat(2,1fr);gap:4px;border:3px solid #5e35b1;border-radius:12px;padding:8px;background:#f3e5f5}.km-tf-cell{width:40px;height:40px;display:flex;align-items:center;justify-content:center;border:2px dashed #ce93d8;border-radius:8px;font-size:1.3rem;transition:all .3s}.km-tf-cell.filled{background:#e8f5e9;border-color:#66bb6a;border-style:solid}.km-tf-cell.added{background:#fff3e0;border-color:#ff9800;border-style:solid}.km-tf-cell.empty{background:#fafafa}.km-tf-overflow{display:flex;align-items:center;gap:6px;margin-top:8px;padding:8px 12px;background:#fff3e0;border-radius:8px}.km-tf-overflow-label{font-weight:600;color:#e65100;font-size:.9rem}.km-tf-info{font-size:1rem;color:#555;margin-top:8px}.km-tf-equation{font-size:1.2rem;font-weight:700;color:#1565c0;margin-top:8px}.km-place-value-area{display:flex;flex-direction:column;align-items:center;gap:16px;padding:16px;background:#f5f5f5;border-radius:16px;margin-bottom:12px}.km-pv-title{font-weight:700;font-size:1.1rem;color:#1565c0}.km-pv-number{display:flex;flex-direction:column;align-items:center;gap:8px}.km-pv-label{font-weight:700;font-size:1.3rem;color:#333}.km-pv-blocks{display:flex;gap:16px;align-items:flex-end}.km-pv-group{display:flex;flex-direction:column;align-items:center;gap:4px}.km-pv-group-label{font-size:.75rem;color:#777;font-weight:600}.km-pv-items{display:flex;gap:3px;flex-wrap:wrap;justify-content:center}.km-pv-hundred{width:40px;height:40px;background:#1565c0;border-radius:4px;display:flex;flex-direction:column;justify-content:space-between;padding:2px}.km-pv-hundred-grid{display:flex;flex-direction:column;gap:1px;height:100%}.km-pv-hundred-row{flex:1;background:#ffffff4d;border-radius:1px}.km-pv-ten{width:8px;height:40px;background:#43a047;border-radius:3px}.km-pv-one{width:12px;height:12px;background:#ff9800;border-radius:50%}.km-pv-operator{font-size:1.5rem;font-weight:700;color:#d32f2f}.km-pv-result{font-size:1.4rem;font-weight:700;color:#1565c0;padding:8px 16px;background:#e3f2fd;border-radius:12px}.km-skip-count-area{display:flex;flex-direction:column;align-items:center;gap:12px;padding:16px;margin-bottom:12px}.km-sc-label{font-weight:600;font-size:1rem;color:#e65100}.km-sc-track{position:relative;width:100%;height:80px;background:linear-gradient(to right,#fff3e0,#ffe0b2);border-radius:8px;margin-top:20px}.km-sc-tick{position:absolute;bottom:0;transform:translate(-50%);display:flex;flex-direction:column;align-items:center}.km-sc-tick.highlight .km-sc-num{color:#e65100;font-weight:700}.km-sc-tick.highlight .km-sc-mark{background:#e65100;height:16px}.km-sc-mark{width:2px;height:10px;background:#999}.km-sc-num{font-size:.75rem;color:#666;margin-top:2px}.km-sc-jump{position:absolute;bottom:30px;height:30px;border:2px solid #e65100;border-bottom:none;border-radius:30px 30px 0 0;display:flex;align-items:flex-start;justify-content:center}.km-sc-jump-label{font-size:.7rem;font-weight:700;color:#e65100;background:#fff3e0;padding:1px 6px;border-radius:8px;position:relative;top:-8px}.km-sc-result{font-size:1.2rem;font-weight:700;color:#e65100}.km-guided-steps{margin-top:20px;padding:16px;background:linear-gradient(135deg,#f8f9ff,#f0f4ff);border-radius:16px;border:2px solid #e0e7ff;box-shadow:0 4px 12px #6366f11a}.km-gs-header{font-weight:800;font-size:1.2rem;color:#4f46e5;margin-bottom:12px;text-align:center}.km-gs-cards{display:flex;flex-direction:column;gap:10px}.km-gs-card{display:flex;align-items:flex-start;gap:12px;padding:14px 16px;border-radius:14px;font-size:1.1rem;border-left:4px solid;box-shadow:0 3px 8px #00000014;transition:transform .2s ease}.km-gs-card:hover{transform:translate(4px)}.km-gs-card.km-step-color-0{background:linear-gradient(135deg,#e3f2fd,#bbdefb);border-color:#2196f3}.km-gs-card.km-step-color-1{background:linear-gradient(135deg,#e8f5e9,#c8e6c9);border-color:#4caf50}.km-gs-card.km-step-color-2{background:linear-gradient(135deg,#fff3e0,#ffe0b2);border-color:#ff9800}.km-gs-card.km-step-color-3{background:linear-gradient(135deg,#fce4ec,#f8bbd0);border-color:#e91e63}.km-gs-card.km-step-color-4{background:linear-gradient(135deg,#f3e5f5,#e1bee7);border-color:#9c27b0}.km-gs-num{display:flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:50%;background:#fff;font-weight:800;font-size:1rem;color:#333;flex-shrink:0;box-shadow:0 2px 4px #00000026}.km-gs-text{color:#1f2937;line-height:1.6;font-weight:500}.km-gs-btn{margin-top:14px;padding:12px 24px;border:none;border-radius:12px;background:linear-gradient(135deg,#42a5f5,#1976d2);color:#fff;font-weight:700;font-size:1rem;cursor:pointer;transition:all .2s;box-shadow:0 4px 12px #2196f34d}.km-gs-btn:hover{transform:translateY(-2px);box-shadow:0 6px 16px #2196f366}.km-gs-complete{margin-top:14px;font-weight:700;color:#2e7d32;font-size:1.1rem;text-align:center;background:#e8f5e9;padding:10px 20px;border-radius:10px}.km-quadrilaterals{margin:20px 0;padding:24px;background:linear-gradient(135deg,#fef3c7,#fde68a);border-radius:20px;border:3px solid #f59e0b}.km-quad-title{text-align:center;font-size:1.2rem;font-weight:700;color:#92400e;margin-bottom:20px}.km-shape-diamond{width:50px;height:50px;background:linear-gradient(145deg,#ec4899,#db2777);transform:rotate(45deg);border-radius:4px;box-shadow:0 4px 8px #ec48994d}.km-shape-trapezoid{width:70px;height:40px;background:linear-gradient(145deg,#06b6d4,#0891b2);border-radius:4px;clip-path:polygon(15% 0%,85% 0%,100% 100%,0% 100%);box-shadow:0 4px 8px #06b6d44d}.km-shape-sides{font-size:.8rem;color:#6b7280;background:#f3f4f6;padding:4px 10px;border-radius:12px;font-weight:500}.km-pv-blocks{margin:20px 0;padding:24px;background:linear-gradient(135deg,#f0fdf4,#dcfce7);border-radius:20px;border:3px solid #22c55e}.km-pv-title{text-align:center;font-size:1.2rem;font-weight:700;color:#166534;margin-bottom:20px}.km-pv-groups{display:flex;justify-content:center;gap:24px;flex-wrap:wrap;margin-bottom:20px}.km-pv-group{display:flex;flex-direction:column;align-items:center;gap:10px;padding:16px;background:#fff;border-radius:16px;box-shadow:0 4px 12px #00000014;min-width:100px}.km-pv-label{font-size:.9rem;font-weight:700;color:#374151}.km-pv-blocks-row{display:flex;gap:6px;flex-wrap:wrap;justify-content:center;min-height:60px;align-items:center}.km-pv-hundred-block{width:50px;height:50px;background:linear-gradient(145deg,#3b82f6,#2563eb);border-radius:4px;box-shadow:0 3px 8px #3b82f666;overflow:hidden}.km-pv-hundred-grid{display:grid;grid-template-columns:repeat(10,1fr);grid-template-rows:repeat(10,1fr);width:100%;height:100%;gap:.5px;padding:2px}.km-pv-mini-cell{background:#ffffff4d;border-radius:1px}.km-pv-hundreds .km-pv-label{color:#1d4ed8}.km-pv-hundreds{border:2px solid #3b82f6}.km-pv-tens-row{min-height:50px}.km-pv-ten-stick{width:8px;height:50px;background:linear-gradient(145deg,#22c55e,#16a34a);border-radius:4px;box-shadow:0 2px 6px #22c55e66;transform-origin:bottom}.km-pv-tens .km-pv-label{color:#16a34a}.km-pv-tens{border:2px solid #22c55e}.km-pv-ones-row{display:grid;grid-template-columns:repeat(5,1fr);gap:4px;max-width:80px}.km-pv-one-cube{width:12px;height:12px;background:linear-gradient(145deg,#f97316,#ea580c);border-radius:2px;box-shadow:0 2px 4px #f9731666}.km-pv-ones .km-pv-label{color:#ea580c}.km-pv-ones{border:2px solid #f97316}.km-pv-value{font-size:.85rem;font-weight:600;color:#6b7280;background:#f3f4f6;padding:4px 10px;border-radius:10px}.km-pv-equation{display:flex;justify-content:center;align-items:center;gap:8px;flex-wrap:wrap;padding:16px;background:#fff;border-radius:12px;box-shadow:0 2px 8px #0000000d}.km-pv-eq-num{font-size:1.3rem;font-weight:700;padding:6px 12px;border-radius:8px}.km-pv-eq-hundreds{background:#dbeafe;color:#1d4ed8}.km-pv-eq-tens{background:#dcfce7;color:#16a34a}.km-pv-eq-ones{background:#ffedd5;color:#ea580c}.km-pv-eq-op{font-size:1.2rem;font-weight:700;color:#6b7280}.km-pv-eq-result{font-size:1.5rem;font-weight:800;color:#166534;background:linear-gradient(135deg,#dcfce7,#bbf7d0);padding:8px 16px;border-radius:10px;border:2px solid #22c55e}.km-pv-preview{margin:20px 0;padding:20px;background:linear-gradient(135deg,#f0fdf4,#dcfce7);border-radius:16px;border:2px solid #22c55e}.km-pv-mini-blocks{display:flex;justify-content:center;gap:20px;flex-wrap:wrap;margin-bottom:16px}.km-pv-mini-group{display:flex;flex-direction:column;align-items:center;gap:8px}.km-pv-mini-hundreds{display:flex;gap:4px}.km-pv-mini-hundred{width:32px;height:32px;background:linear-gradient(145deg,#3b82f6,#2563eb);border-radius:4px;box-shadow:0 2px 4px #3b82f666;display:grid;grid-template-columns:repeat(5,1fr);grid-template-rows:repeat(5,1fr);gap:1px;padding:2px}.km-pv-mini-hundred:before{content:"";position:absolute}.km-pv-mini-tens{display:flex;gap:3px}.km-pv-mini-ten{width:6px;height:32px;background:linear-gradient(145deg,#22c55e,#16a34a);border-radius:2px;box-shadow:0 2px 4px #22c55e66}.km-pv-mini-ones{display:flex;gap:3px;flex-wrap:wrap;max-width:60px}.km-pv-mini-one{width:8px;height:8px;background:linear-gradient(145deg,#f97316,#ea580c);border-radius:2px;box-shadow:0 1px 2px #f9731666}.km-pv-mini-label{font-size:.75rem;font-weight:600;color:#6b7280}.km-pv-mini-total{text-align:center;font-size:1.1rem;font-weight:700;color:#166534;background:#fff;padding:10px 16px;border-radius:10px;box-shadow:0 2px 6px #0000000d}.km-number-comparison{margin:20px 0;padding:24px;background:linear-gradient(135deg,#fef3c7,#fde68a);border-radius:20px;border:3px solid #f59e0b;width:100%}.km-cmp-title{text-align:center;font-size:1.3rem;font-weight:800;color:#92400e;margin-bottom:20px}.km-cmp-numbers{display:flex;justify-content:center;align-items:flex-start;gap:16px;flex-wrap:wrap}.km-cmp-card{display:flex;flex-direction:column;align-items:center;gap:12px;padding:20px;background:#fff;border-radius:16px;box-shadow:0 4px 12px #00000014;min-width:140px;position:relative;transition:transform .3s ease,box-shadow .3s ease}.km-cmp-card:hover{transform:translateY(-4px)}.km-cmp-card.km-cmp-winner{background:linear-gradient(135deg,#d1fae5,#a7f3d0);border:3px solid #10b981;box-shadow:0 6px 20px #10b9814d}.km-cmp-num-large{font-size:2.5rem;font-weight:800;color:#1f2937}.km-cmp-winner .km-cmp-num-large{color:#065f46}.km-cmp-breakdown{display:flex;gap:10px}.km-cmp-place{display:flex;flex-direction:column;align-items:center;gap:6px;padding:10px;background:#f9fafb;border-radius:10px;min-width:50px;transition:all .3s ease}.km-cmp-place.km-cmp-highlight{background:linear-gradient(135deg,#dcfce7,#bbf7d0);border:2px solid #22c55e;transform:scale(1.05)}.km-cmp-place.km-cmp-smaller{background:#fef2f2;border:2px solid #fecaca;opacity:.8}.km-cmp-digit{font-size:1.5rem;font-weight:700;color:#374151}.km-cmp-highlight .km-cmp-digit{color:#166534}.km-cmp-smaller .km-cmp-digit{color:#dc2626}.km-cmp-label{font-size:.65rem;font-weight:600;color:#6b7280;text-transform:uppercase}.km-cmp-hundreds .km-cmp-label{color:#1d4ed8}.km-cmp-tens .km-cmp-label{color:#16a34a}.km-cmp-ones .km-cmp-label{color:#ea580c}.km-cmp-blocks{display:flex;gap:3px;flex-wrap:wrap;justify-content:center;min-height:20px;max-width:60px}.km-cmp-hundred{width:16px;height:16px;background:linear-gradient(145deg,#3b82f6,#2563eb);border-radius:2px;box-shadow:0 1px 3px #3b82f666}.km-cmp-ten{width:5px;height:20px;background:linear-gradient(145deg,#22c55e,#16a34a);border-radius:2px;box-shadow:0 1px 2px #22c55e66;transform-origin:bottom}.km-cmp-one{width:8px;height:8px;background:linear-gradient(145deg,#f97316,#ea580c);border-radius:50%;box-shadow:0 1px 2px #f9731666}.km-cmp-vs{display:flex;align-items:center;justify-content:center;width:50px;height:50px;background:linear-gradient(135deg,#6366f1,#8b5cf6);color:#fff;font-size:1.8rem;font-weight:800;border-radius:50%;box-shadow:0 4px 12px #6366f166;align-self:center}.km-cmp-badge{position:absolute;top:-12px;right:-12px;background:linear-gradient(135deg,#fbbf24,#f59e0b);color:#78350f;font-size:.9rem;font-weight:700;padding:6px 12px;border-radius:20px;box-shadow:0 3px 8px #f59e0b66}.km-cmp-explanation{text-align:center;font-size:1rem;font-weight:600;color:#78350f;background:#fff;padding:14px 20px;border-radius:12px;margin-top:16px;box-shadow:0 2px 8px #0000000d}.km-ordering-mode{background:linear-gradient(135deg,#f0f9ff,#e0f2fe);border-color:#0ea5e9}.km-ordering-numbers{display:flex;justify-content:center;align-items:stretch;gap:16px;flex-wrap:wrap;margin-bottom:20px}.km-ordering-card{flex:1;min-width:120px;max-width:160px;padding:18px 14px}.km-ordering-place-hint{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:4px;font-size:.75rem;color:#64748b;margin-top:8px}.km-place-badge{display:inline-flex;align-items:center;justify-content:center;min-width:22px;height:22px;padding:0 6px;background:linear-gradient(135deg,#f59e0b,#d97706);color:#fff;font-weight:700;font-size:.85rem;border-radius:6px;margin:0 2px}.km-ordering-rank{margin-top:12px;padding:8px 14px;background:linear-gradient(135deg,#fef3c7,#fde68a);border-radius:20px;font-size:1rem;font-weight:700;color:#92400e;border:2px solid #f59e0b}.km-ordering-result{background:#fff;padding:18px 24px;border-radius:16px;box-shadow:0 4px 12px #00000014;text-align:center}.km-ordering-arrow{font-size:1.4rem;font-weight:800;color:#1e40af;margin-bottom:8px}.km-ordered-num{display:inline-block;padding:6px 14px;background:linear-gradient(135deg,#dbeafe,#bfdbfe);border-radius:10px;margin:0 4px;border:2px solid #3b82f6}.km-ordering-label{font-size:.9rem;font-weight:600;color:#64748b}.km-cmp-preview{margin:20px 0;padding:24px;background:linear-gradient(135deg,#fef3c7,#fde68a);border-radius:16px;border:2px solid #f59e0b}.km-cmp-preview-cards{display:flex;justify-content:center;align-items:center;gap:16px;margin-bottom:12px}.km-cmp-preview-card{padding:16px 28px;background:#fff;border-radius:12px;box-shadow:0 4px 12px #0000001a}.km-cmp-preview-num{font-size:2rem;font-weight:800;color:#1f2937}.km-cmp-preview-vs{font-size:2rem}.km-cmp-preview-hint{text-align:center;font-size:1.1rem;font-weight:700;color:#92400e}.km-ordering-preview{background:linear-gradient(135deg,#f0f9ff,#e0f2fe);border-color:#0ea5e9}.km-ordering-preview .km-cmp-preview-cards{flex-wrap:wrap;gap:12px}.km-ordering-preview .km-cmp-preview-card{padding:12px 20px}.km-ordering-preview .km-cmp-preview-num{font-size:1.6rem}.km-ordering-preview .km-cmp-preview-vs{font-size:1.4rem}.km-ordering-preview .km-cmp-preview-hint{color:#0369a1}.km-mental-addition{margin:20px 0;padding:24px;background:linear-gradient(135deg,#e0f2fe,#bae6fd);border-radius:20px;border:3px solid #0ea5e9;width:100%}.km-mental-title{text-align:center;font-size:1.4rem;font-weight:800;color:#0c4a6e;margin-bottom:20px}.km-mental-equation{display:flex;justify-content:center;align-items:center;gap:12px;padding:16px 24px;background:#fff;border-radius:16px;box-shadow:0 4px 12px #0ea5e933;margin-bottom:24px}.km-mental-num{font-size:2.2rem;font-weight:800;color:#1e40af}.km-mental-addend{color:#16a34a;background:linear-gradient(135deg,#dcfce7,#bbf7d0);padding:4px 16px;border-radius:12px;border:2px solid #22c55e}.km-mental-op{font-size:2rem;font-weight:700;color:#f97316}.km-mental-eq{font-size:2rem;font-weight:700;color:#374151}.km-mental-result{color:#6b7280;font-style:italic}.km-mental-steps{display:flex;flex-direction:column;gap:16px}.km-mental-step{padding:16px 20px;background:#fff;border-radius:16px;box-shadow:0 3px 10px #00000014;border-left:5px solid #0ea5e9}.km-mental-step-highlight{background:linear-gradient(135deg,#fef3c7,#fde68a);border-left-color:#f59e0b}.km-mental-answer-step{background:linear-gradient(135deg,#d1fae5,#a7f3d0);border-left-color:#10b981}.km-mental-step-header{display:flex;align-items:center;gap:12px;margin-bottom:12px}.km-mental-step-num{display:flex;align-items:center;justify-content:center;width:32px;height:32px;background:linear-gradient(135deg,#0ea5e9,#0284c7);color:#fff;font-weight:800;border-radius:50%;font-size:1rem}.km-mental-step-highlight .km-mental-step-num{background:linear-gradient(135deg,#f59e0b,#d97706)}.km-mental-answer-step .km-mental-step-num{background:linear-gradient(135deg,#10b981,#059669);font-size:1.2rem}.km-mental-step-label{font-size:1.1rem;font-weight:700;color:#1f2937}.km-mental-breakdown{display:flex;justify-content:center;align-items:flex-end;gap:16px;flex-wrap:wrap}.km-mental-place-group{display:flex;flex-direction:column;align-items:center;gap:8px}.km-mental-blocks{display:flex;gap:6px;flex-wrap:wrap;justify-content:center;min-height:50px;align-items:center}.km-mental-block{display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.75rem;color:#fff;text-shadow:0 1px 2px rgba(0,0,0,.2)}.km-mental-hundred{width:50px;height:50px;background:linear-gradient(145deg,#3b82f6,#2563eb);border-radius:8px;box-shadow:0 4px 8px #3b82f666}.km-mental-ten{width:24px;height:50px;background:linear-gradient(145deg,#22c55e,#16a34a);border-radius:6px;box-shadow:0 4px 8px #22c55e66}.km-mental-one{width:20px;height:20px;background:linear-gradient(145deg,#f97316,#ea580c);border-radius:50%;box-shadow:0 3px 6px #f9731666}.km-mental-new{animation:mental-bounce .5s ease;box-shadow:0 0 0 3px #10b98166}@keyframes mental-bounce{0%{transform:translateY(-20px);opacity:0}60%{transform:translateY(5px)}to{transform:translateY(0);opacity:1}}.km-mental-place-label{font-size:.85rem;font-weight:600;color:#6b7280;background:#f3f4f6;padding:4px 10px;border-radius:8px}.km-mental-plus{font-size:1.5rem;font-weight:700;color:#f97316;padding:0 8px}.km-mental-addend-visual{display:flex;flex-direction:column;align-items:center;gap:16px}.km-mental-addend-box{display:flex;flex-direction:column;align-items:center;gap:6px;padding:16px 32px;background:linear-gradient(135deg,#dcfce7,#bbf7d0);border:3px solid #22c55e;border-radius:16px;box-shadow:0 4px 12px 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