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#4f46e533;align-items:center;gap:12px;padding:12px;display:flex}.child-avatar{border-radius:var(--radius-full);width:44px;height:44px;box-shadow:var(--shadow-sm);background:linear-gradient(135deg,#f59e0b,#ec4899);justify-content:center;align-items:center;font-size:1.3rem;display:flex}.child-info h4{color:var(--primary);font-size:1.1rem;line-height:1.2}.child-info p{color:var(--text-muted);font-size:.85rem}.topic-selector-list{flex-direction:column;gap:8px;display:flex}.topic-btn{border-radius:var(--radius-md);border:2px solid var(--border-light);background:var(--bg-card);font-family:var(--font-primary);text-align:left;cursor:pointer;justify-content:space-between;align-items:center;padding:12px 16px;font-weight:600;transition:all .2s;display:flex}.topic-btn:hover{border-color:var(--primary-light);background:#f8faff;transform:translateY(-1px)}.topic-btn.active{border-color:var(--primary);background:var(--primary-bg);color:var(--primary)}.math-board{background:var(--bg-card);border-radius:var(--radius-lg);border:3px solid var(--border-light);box-shadow:var(--shadow-lg);flex-direction:column;align-items:center;min-height:520px;padding:30px 24px;display:flex;position:relative}.instruction-banner{border-radius:var(--radius-md);background:linear-gradient(135deg,#ede9fe,#e0e7ff);border:2px solid #c7d2fe;align-items:center;gap:12px;width:100%;max-width:580px;margin-bottom:24px;padding:12px 20px;display:flex}.instruction-text{color:#3730a3;font-size:1.05rem;font-weight:600;line-height:1.4}.vertical-stack-container{-webkit-user-select:none;user-select:none;flex-direction:column;align-items:center;margin:10px 0 24px;display:flex}.carry-row{grid-template-columns:var(--slot-size) var(--slot-size);gap:12px;height:60px;margin-bottom:8px;display:grid}.carry-box{width:var(--slot-size);border:2.5px dashed var(--text-light);border-radius:var(--radius-md);height:52px;font-family:var(--font-mono);color:var(--accent-purple);cursor:pointer;background:#f8fafc;justify-content:center;align-items:center;font-size:1.5rem;font-weight:700;transition:all .2s cubic-bezier(.4,0,.2,1);display:flex}.carry-box.active{border-color:var(--accent-purple);background:var(--accent-purple-light);transform:scale(1.05);box-shadow:0 0 0 4px #8b5cf633}.carry-box.filled{border-style:solid;border-color:var(--accent-purple);background:var(--accent-purple-light)}.carry-box.error{border-style:solid;border-color:var(--accent-coral);background:var(--accent-coral-light);color:var(--accent-coral);animation:.4s ease-in-out shake}.carry-box.empty-slot{visibility:hidden}.operand-row{width:calc(var(--slot-size) * 2 + 60px);justify-content:flex-end;align-items:center;display:flex;position:relative}.operator-sign{color:var(--primary);font-size:2.4rem;font-weight:700;font-family:var(--font-mono);margin-right:16px}.digit-slots{grid-template-columns:var(--slot-size) var(--slot-size);gap:12px;display:grid}.digit-cell{width:var(--slot-size);height:var(--slot-size);font-family:var(--font-mono);font-size:var(--slot-font-size);color:var(--text-dark);border-radius:var(--radius-md);border:2px solid var(--border-light);background:#f8fafc;justify-content:center;align-items:center;font-weight:700;display:flex}.math-divider-line{width:calc(var(--slot-size) * 2 + 50px);background:var(--text-dark);border-radius:2px;height:4px;margin:12px 0}.answer-row{grid-template-columns:var(--slot-size) var(--slot-size);gap:12px;margin-left:36px;display:grid}.answer-slot{width:var(--slot-size);height:var(--slot-size);border:3px dashed var(--primary-light);border-radius:var(--radius-md);background:var(--primary-bg);font-family:var(--font-mono);font-size:var(--slot-font-size);color:var(--primary);cursor:pointer;justify-content:center;align-items:center;font-weight:700;transition:all .2s cubic-bezier(.4,0,.2,1);display:flex}.answer-slot.active{border-color:var(--primary);background:#fff;border-style:solid;transform:scale(1.05);box-shadow:0 0 0 4px #4f46e540}.answer-slot.filled{border-style:solid;border-color:var(--primary);background:#fff}.answer-slot.success{border-style:solid;border-color:var(--accent-green);background:var(--accent-green-light);color:#065f46}.answer-slot.error{border-style:solid;border-color:var(--accent-coral);background:var(--accent-coral-light);color:var(--accent-coral);animation:.4s ease-in-out shake}@media(max-width:480px){:root{--slot-size:55px;--slot-font-size:1.8rem}}.feedback-box{border-radius:var(--radius-md);align-items:center;gap:10px;width:100%;max-width:460px;margin-top:16px;padding:12px 20px;font-weight:600;animation:.3s fadeIn;display:flex}.feedback-box.hint{background:var(--accent-purple-light);color:#5b21b6;border:2px solid #ddd6fe}.feedback-box.error{background:var(--accent-coral-light);color:#991b1b;border:2px solid #fecaca}.feedback-box.success{background:var(--accent-green-light);color:#065f46;border:2px solid #a7f3d0}.parent-dash-container{flex-direction:column;gap:24px;width:100%;display:flex}.parent-card{background:var(--bg-card);border-radius:var(--radius-lg);border:2px solid var(--border-light);box-shadow:var(--shadow-sm);padding:24px}.section-header{justify-content:space-between;align-items:center;margin-bottom:16px;display:flex}.section-title{color:var(--text-dark);align-items:center;gap:8px;font-size:1.3rem;display:flex}.coppa-banner{border-radius:var(--radius-md);background:#f0fdf4;border:2px solid #86efac;margin-bottom:20px;padding:16px}.coppa-banner h4{color:#166534;align-items:center;gap:8px;margin-bottom:6px;font-size:1.05rem;display:flex}.coppa-banner p{color:#15803d;font-size:.9rem;line-height:1.4}.child-cards-grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px;margin-top:12px;display:grid}.child-management-card{border:2px solid var(--border-light);border-radius:var(--radius-md);background:#fafafa;flex-direction:column;gap:12px;padding:16px;display:flex}.profile-field-row{justify-content:space-between;font-size:.95rem;display:flex}.btn-danger{color:#dc2626;border-radius:var(--radius-sm);font-family:var(--font-primary);cursor:pointer;background:#fee2e2;border:2px solid #fecaca;justify-content:center;align-items:center;gap:6px;padding:8px 14px;font-weight:600;transition:all .2s;display:flex}.btn-danger:hover{background:#fecaca;border-color:#f87171}.btn-primary{background:var(--primary);color:#fff;border-radius:var(--radius-md);font-family:var(--font-primary);cursor:pointer;border:none;align-items:center;gap:8px;padding:10px 20px;font-size:1rem;font-weight:600;transition:all .2s;display:inline-flex;box-shadow:0 4px 12px #4f46e54d}.btn-primary:hover{background:#4338ca;transform:translateY(-1px)}.modal-backdrop{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:1000;background:#0f172a99;justify-content:center;align-items:center;padding:20px;display:flex;position:fixed;top:0;right:0;bottom:0;left:0}@media(max-width:480px){.modal-backdrop{padding:12px 8px}}.modal-content{background:var(--bg-card);border-radius:var(--radius-lg);width:100%;max-width:500px;box-shadow:var(--shadow-lg);border:3px solid var(--border-light);padding:28px}@keyframes shake{0%,to{transform:translate(0)}20%,60%{transform:translate(-6px)}40%,80%{transform:translate(6px)}}@keyframes fadeIn{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}@property --tw-translate-x{syntax:"*";inherits:false;initial-value:0}@property --tw-translate-y{syntax:"*";inherits:false;initial-value:0}@property --tw-translate-z{syntax:"*";inherits:false;initial-value:0}@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}@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-space-y-reverse{syntax:"*";inherits:false;initial-value:0}@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-leading{syntax:"*";inherits:false}@property --tw-font-weight{syntax:"*";inherits:false}@property --tw-tracking{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-ease{syntax:"*";inherits:false}@keyframes pulse{50%{opacity:.5}}@keyframes bounce{0%,to{animation-timing-function:cubic-bezier(.8,0,1,1);transform:translateY(-25%)}50%{animation-timing-function:cubic-bezier(0,0,.2,1);transform:none}}