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var(--border-color);border-radius:var(--radius-lg);padding:1.25rem;transition:all .2s ease;cursor:pointer;position:relative;overflow:hidden}.interactive-box:hover{border-color:var(--primary-light);transform:translateY(-3px);box-shadow:var(--box-shadow-md)}.interactive-box:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #4f46e533}.card-stat-hero{display:flex;flex-direction:column;align-items:center;justify-content:center;margin:1.5rem 0;padding:1rem;background:linear-gradient(to bottom right,#f8fafc,#f1f5f9);border-radius:12px;border:1px solid #e2e8f0}.stat-ring{background:#fff;width:100px;height:100px;border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 10px #0000000d;border:4px solid #0ea5e9;margin-bottom:1rem}.stat-value{font-size:2rem;font-weight:800;color:#0369a1;line-height:1}.stat-label{font-size:1.1rem;color:#475569;font-weight:600;text-align:center}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideInUp{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}@keyframes slideInRight{0%{transform:translate(20px);opacity:0}to{transform:translate(0);opacity:1}}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.05)}}@keyframes shake{0%,to{transform:translate(0)}10%,30%,50%,70%,90%{transform:translate(-4px)}20%,40%,60%,80%{transform:translate(4px)}}@keyframes pulseOnce{0%,to{transform:scale(1)}50%{transform:scale(1.15)}}@keyframes bounceHint{0%,to{transform:translate(-50%) translateY(0)}50%{transform:translate(-50%) translateY(-5px)}}@keyframes drawLine{0%{stroke-dashoffset:1000}to{stroke-dashoffset:0}}.animate-fadeIn{animation:fadeIn .3s ease-out}.animate-slideInUp{animation:slideInUp .3s ease-out}.animate-slideInRight{animation:slideInRight .3s ease-out}.animate-pulse{animation:pulse .3s ease-out}.animate-shake{animation:shake .5s ease-out}.transition-all{transition:all .2s ease}.interactive-hover{transition:all .2s ease;position:relative}.interactive-hover:hover{transform:translateY(-2px);box-shadow:0 4px 8px #0000001a}@media (max-width: 768px){#app-container.sidebar-layout{grid-template-columns:1fr}.sidebar-nav{position:fixed;top:0;left:-300px;height:100%;width:280px;background:var(--bg-primary);box-shadow:2px 0 10px #0000001a;z-index:1000;transition:left .3s ease;padding:1.5rem}.sidebar-nav.open{left:0}.mobile-menu-toggle{display:block;position:fixed;top:1rem;left:1rem;z-index:1001;background:var(--bg-primary);border:none;border-radius:50%;width:48px;height:48px;box-shadow:var(--shadow-md);display:flex;align-items:center;justify-content:center}.overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#00000080;z-index:999;display:none}.overlay.active{display:block}.quiz-options{grid-template-columns:1fr}.drag-drop-content{flex-direction:column}.item-pool{order:2}.drop-zones-container{order:1}}