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#674ea726}.input-sum-disabled{width:70px;height:50px;text-align:center;font-size:1.5rem;border:3px solid #bfdbfe;border-radius:.75rem;background:#e5eef9;font-family:Arial,Calibri,Trebuchet MS,sans-serif;font-weight:700;color:var(--text-color);line-height:1;cursor:not-allowed;opacity:.7}.input-sum-disabled::-webkit-outer-spin-button,.input-sum-disabled::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}.input-final{width:70px;height:50px;text-align:center;font-size:1.5rem;border:3px solid #bfdbfe;border-radius:.75rem;background:#dbeafe;transition:all .2s ease;font-family:Arial,Calibri,Trebuchet MS,sans-serif;font-weight:700;color:var(--text-color);line-height:1}.input-final::-webkit-outer-spin-button,.input-final::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}.input-final:focus{outline:none;border-color:var(--purple-primary);background:var(--bg-card-hover);box-shadow:0 0 0 4px #674ea726}.correct-answer{font-size:1rem;color:#10b981;font-weight:700;text-align:center;margin-top:.25rem;min-height:1.5rem;transition:all .2s ease}.hard-input-wrapper{display:flex;flex-direction:column;align-items:center;gap:.25rem}.input-label{font-size:.65rem;font-weight:700;color:var(--text-muted);text-transform:uppercase}.hint-text{font-size:.65rem;color:var(--red-base);font-weight:700;margin-top:.25rem;height:16px;transition:all .2s ease;opacity:0}.hint-visible{opacity:1}.hint-correct{color:#10b981}.hint-error{color:var(--red-base)}.button-group{display:flex;flex-direction:column;gap:.5rem;justify-content:center;align-items:center;margin-top:1.5rem}@media(min-width:640px){.button-group{flex-direction:row;gap:1rem}}.hidden{display:none}.hard-mode-display{text-align:center;font-size:2rem;margin:1.5rem 0}.hard-number{margin-bottom:1rem;font-size:4rem;font-weight:700;color:var(--text-color);line-height:1.2}.hard-operator{font-size:3rem;font-weight:700;color:#cbd5e1;margin-bottom:1rem}.hard-divider{border-top:4px solid var(--text-color);padding-top:1rem;margin:1rem 0}.hard-inputs{display:flex;flex-direction:row-reverse;gap:1rem;justify-content:center;flex-wrap:wrap;margin-top:1.5rem}@keyframes popIn{0%{transform:scale(0);opacity:0}50%{transform:scale(1.2)}to{transform:scale(1);opacity:1}}.instruction-box{padding:1.5rem 2rem;border-radius:1rem;text-align:center;font-weight:700;font-size:1rem;border:2px solid;margin-bottom:1.5rem;transition:all .2s 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