:root{--accent-correct:#22c55e;--accent-wrong:#ef4444;--accent-primary:#6366f1;--accent-secondary:#f59e0b;--answer-a:#ef4444;--answer-b:#3b82f6;--answer-c:#f59e0b;--answer-d:#22c55e;--font-heading:"Fredoka", system-ui, sans-serif;--font-body:"Inter", system-ui, -apple-system, sans-serif}#root{max-width:480px;min-height:100dvh;margin:0 auto;padding:16px}@media (width>=640px){#root{max-width:800px}}h1,h2,h3,h4{font-family:var(--font-heading);font-weight:700;line-height:1.2}.answer-tile{color:#fff;text-align:left;cursor:pointer;border:none;border-radius:12px;width:100%;min-height:44px;padding:16px 20px;font-size:1.05rem;font-weight:600;transition:transform .15s cubic-bezier(.34,1.56,.64,1),filter .2s,box-shadow .2s}.answer-tile:active{transform:scale(.97)}.answer-tile-a{background:var(--answer-a)}.answer-tile-b{background:var(--answer-b)}.answer-tile-c{background:var(--answer-c)}.answer-tile-d{background:var(--answer-d)}.answer-tile-correct{filter:brightness(1.15);animation:.5s 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0);white-space:nowrap;border-width:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUpFade{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes slideDownFade{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}@keyframes scaleIn{0%{opacity:0;transform:scale(.8)}to{opacity:1;transform:scale(1)}}@keyframes scaleBounce{0%{transform:scale(0)}60%{transform:scale(1.15)}to{transform:scale(1)}}@keyframes pulseGlow{0%,to{box-shadow:0 0 #6366f166}50%{box-shadow:0 0 20px 8px #6366f133}}@keyframes correctPulse{0%{transform:scale(1)}30%{transform:scale(1.05)}to{transform:scale(1)}}@keyframes wrongShake{0%,to{transform:translate(0)}20%{transform:translate(-6px)}40%{transform:translate(6px)}60%{transform:translate(-4px)}80%{transform:translate(4px)}}@keyframes urgencyPulse{0%,to{opacity:1}50%{opacity:.5}}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@keyframes brainPulse{0%,to{opacity:.8;transform:scale(1)}50%{opacity:1;transform:scale(1.1)}}@keyframes toastIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes toastOut{0%{opacity:1;transform:translateY(0)}to{opacity:0;transform:translateY(-100%)}}.stagger-item{opacity:0;animation:.4s forwards slideUpFade}.animate-fade-in{animation:.25s fadeIn}.animate-slide-up{animation:.4s slideUpFade}.animate-scale-in{animation:.5s scaleBounce}.animate-pulse-glow{animation:2s infinite pulseGlow}.correct-anim{animation:.5s correctPulse}.wrong-anim{animation:.4s wrongShake}.answer-tile.correct-anim,.answer-tile-correct{filter:brightness(1.15);animation:.5s correctPulse;box-shadow:0 0 16px #22c55e66;background:var(--accent-correct)!important}.answer-tile.wrong-anim,.answer-tile-wrong{filter:brightness(.85);animation:.4s wrongShake;background:var(--accent-wrong)!important}.page-enter{opacity:0;transform:translateY(12px)}.page-enter-active{opacity:1;transition:opacity .25s,transform .25s;transform:translateY(0)}.btn{transition:transform .15s cubic-bezier(.34,1.56,.64,1),opacity .2s,box-shadow .2s}.btn:hover{box-shadow:0 4px 12px #0000001a}.btn:active{transform:scale(.95)}.btn:disabled{box-shadow:none!important;transform:none!important}.card{transition:transform .2s,box-shadow .2s}.loading-container{flex-direction:column;justify-content:center;align-items:center;padding:60px 20px;animation:.3s fadeIn;display:flex}.loading-brain{font-size:3rem;animation:1.2s ease-in-out infinite brainPulse}.loading-text{color:var(--text-secondary);margin-top:16px;font-size:1rem;font-weight:500}.spinner-ring{border:4px solid var(--border);border-top-color:var(--accent-primary);border-radius:50%;width:48px;height:48px;animation:.7s linear infinite spin}.confetti-canvas{pointer-events:none;z-index:999;width:100%;height:100%;position:fixed;top:0;left:0}.toast-container{z-index:300;max-width:90vw;position:fixed;top:16px;left:50%;transform:translate(-50%)}.toast{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);align-items:center;gap:8px;padding:12px 20px;font-size:.95rem;font-weight:600;animation:.35s toastIn;display:flex;box-shadow:0 4px 16px #0000001f}.toast.exiting{animation:.3s forwards toastOut}.toast-success{border-left:4px solid var(--accent-correct)}.toast-info{border-left:4px solid var(--accent-primary)}.toast-warning{border-left:4px solid var(--accent-secondary)}.timer-ring-wrapper{justify-content:center;align-items:center;display:inline-flex;position:relative}.timer-ring-bg{fill:none;stroke:var(--border);stroke-width:6px}.timer-ring-fg{fill:none;stroke-width:6px;stroke-linecap:round;transition:stroke-dashoffset .9s linear,stroke 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