:root{font-family:Fredoka,sans-serif;line-height:1.4}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{min-height:100vh;background:linear-gradient(135deg,#667eea,#764ba2);overflow-x:hidden}body{-webkit-font-smoothing:antialiased}.app{min-height:100vh;display:flex;flex-direction:column;align-items:center;padding:1rem;position:relative}.header{text-align:center;margin-bottom:1.5rem;animation:bounceIn .6s ease-out}.header h1{font-size:2.5rem;font-weight:700;color:#fff;text-shadow:3px 3px 0 rgba(0,0,0,.15);letter-spacing:.02em}.header .subtitle{font-size:1.1rem;color:#ffffffd9;margin-top:.25rem}.nav-tabs{display:flex;gap:.5rem;margin-bottom:1.5rem;background:#ffffff26;padding:.35rem;border-radius:2rem;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.nav-tab{padding:.6rem 1.5rem;border-radius:2rem;border:none;background:transparent;color:#fffc;font-family:Fredoka,sans-serif;font-size:1rem;font-weight:500;cursor:pointer;transition:all .25s ease}.nav-tab:hover{background:#ffffff26;color:#fff}.nav-tab.active{background:#fff;color:#764ba2;font-weight:600;box-shadow:0 2px 10px #00000026}.learn-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:1rem;width:100%;max-width:800px;padding:0 .5rem}.number-card{background:#fff;border-radius:1.25rem;padding:1.25rem .75rem;text-align:center;cursor:pointer;transition:all .25s cubic-bezier(.34,1.56,.64,1);border:4px solid transparent;position:relative;overflow:hidden;box-shadow:0 4px 15px #0000001a}.number-card:before{content:"";position:absolute;top:0;left:0;right:0;height:5px;background:var(--card-color)}.number-card:hover{transform:translateY(-6px) scale(1.03);box-shadow:0 8px 25px #0000002e;border-color:var(--card-color)}.number-card:active{transform:translateY(-2px) scale(.97)}.number-card .big-number{font-size:3rem;font-weight:700;color:var(--card-color);line-height:1;margin-bottom:.4rem}.number-card .number-word{font-size:1rem;font-weight:600;color:#555;text-transform:capitalize;margin-bottom:.5rem}.number-card .objects{font-size:1.4rem;line-height:1.6;min-height:2.2rem}.detail-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:100;animation:fadeIn .2s ease;padding:1rem}.detail-card{background:#fff;border-radius:2rem;padding:2.5rem 2rem;text-align:center;max-width:400px;width:100%;position:relative;animation:popIn .35s cubic-bezier(.34,1.56,.64,1);box-shadow:0 20px 60px #00000040}.detail-close{position:absolute;top:1rem;right:1rem;width:2.25rem;height:2.25rem;border-radius:50%;border:none;background:#f0f0f0;color:#666;font-size:1.2rem;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s}.detail-close:hover{background:#e0e0e0;color:#333}.detail-card .big-number{font-size:6rem;font-weight:700;color:var(--detail-color);line-height:1;margin-bottom:.5rem;animation:pulse 1.5s ease-in-out infinite}.detail-card .number-word{font-size:2rem;font-weight:600;color:#444;text-transform:capitalize;margin-bottom:1rem}.detail-card .objects{font-size:2rem;line-height:1.8;margin-bottom:1.5rem}.detail-nav{display:flex;justify-content:center;gap:1rem}.detail-btn{width:3rem;height:3rem;border-radius:50%;border:3px solid var(--detail-color);background:transparent;color:var(--detail-color);font-size:1.3rem;font-family:Fredoka,sans-serif;font-weight:700;cursor:pointer;transition:all .2s}.detail-btn:hover{background:var(--detail-color);color:#fff}.quiz-container{background:#fff;border-radius:2rem;padding:2.5rem 2rem;text-align:center;max-width:500px;width:100%;box-shadow:0 10px 40px #00000026;animation:bounceIn .5s ease-out}.quiz-progress{display:flex;gap:.4rem;justify-content:center;margin-bottom:1.5rem}.quiz-dot{width:.75rem;height:.75rem;border-radius:50%;background:#e0e0e0;transition:all .3s}.quiz-dot.correct{background:#4ade80;transform:scale(1.2)}.quiz-dot.wrong{background:#f87171;transform:scale(1.2)}.quiz-dot.current{background:#764ba2;transform:scale(1.3);box-shadow:0 0 0 3px #764ba24d}.quiz-question{font-size:1.2rem;font-weight:500;color:#666;margin-bottom:.75rem}.quiz-objects{font-size:2.5rem;line-height:1.6;margin-bottom:2rem;min-height:3.5rem}.quiz-options{display:grid;grid-template-columns:1fr 1fr;gap:.75rem;margin-bottom:1rem}.quiz-option{padding:1rem;border-radius:1rem;border:3px solid #e5e7eb;background:#fff;font-family:Fredoka,sans-serif;font-size:1.5rem;font-weight:600;color:#444;cursor:pointer;transition:all .2s}.quiz-option:hover{border-color:#764ba2;background:#f5f0ff;transform:translateY(-2px)}.quiz-option.correct{border-color:#4ade80;background:#f0fdf4;color:#16a34a;animation:correctPop .4s ease}.quiz-option.wrong{border-color:#f87171;background:#fef2f2;color:#dc2626;animation:shake .4s ease}.quiz-feedback{font-size:1.3rem;font-weight:600;margin-bottom:1rem;min-height:2rem;animation:fadeIn .3s ease}.quiz-feedback.correct{color:#16a34a}.quiz-feedback.wrong{color:#dc2626}.results-card{background:#fff;border-radius:2rem;padding:2.5rem 2rem;text-align:center;max-width:450px;width:100%;box-shadow:0 10px 40px #00000026;animation:bounceIn .5s ease-out}.results-card .trophy{font-size:4rem;margin-bottom:.5rem}.results-card h2{font-size:1.8rem;color:#333;margin-bottom:.5rem}.results-card .score-text{font-size:3.5rem;font-weight:700;color:#764ba2;margin-bottom:.5rem}.results-card .score-label{font-size:1rem;color:#888;margin-bottom:1.5rem}.results-stars{font-size:2.5rem;margin-bottom:1.5rem;letter-spacing:.25rem}.retry-btn{padding:.9rem 2.5rem;border-radius:2rem;border:none;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;font-family:Fredoka,sans-serif;font-size:1.1rem;font-weight:600;cursor:pointer;transition:all .25s;box-shadow:0 4px 15px #764ba24d}.retry-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px #764ba266}.counting-container{background:#fff;border-radius:2rem;padding:2.5rem 2rem;text-align:center;max-width:500px;width:100%;box-shadow:0 10px 40px #00000026;animation:bounceIn .5s ease-out}.counting-prompt{font-size:1.3rem;font-weight:600;color:#555;margin-bottom:1.5rem}.counting-objects{display:flex;flex-wrap:wrap;justify-content:center;gap:.75rem;margin-bottom:2rem;min-height:4rem}.counting-object{font-size:2.8rem;cursor:pointer;transition:all .2s;-webkit-user-select:none;user-select:none;border-radius:.75rem;padding:.25rem}.counting-object:hover{transform:scale(1.2)}.counting-object.counted{transform:scale(1.15);background:#f0fdf4;box-shadow:0 0 0 3px #4ade80;border-radius:.75rem}.counting-display{font-size:2.5rem;font-weight:700;color:#764ba2;margin-bottom:1rem}.counting-target{font-size:1rem;color:#888;margin-bottom:1.5rem}.next-btn{padding:.75rem 2rem;border-radius:2rem;border:none;background:linear-gradient(135deg,#4ade80,#22c55e);color:#fff;font-family:Fredoka,sans-serif;font-size:1rem;font-weight:600;cursor:pointer;transition:all .25s;box-shadow:0 4px 15px #22c55e4d}.next-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px #22c55e66}@keyframes bounceIn{0%{opacity:0;transform:scale(.85) translateY(20px)}60%{transform:scale(1.03) translateY(-5px)}to{opacity:1;transform:scale(1) translateY(0)}}@keyframes popIn{0%{opacity:0;transform:scale(.7)}60%{transform:scale(1.05)}to{opacity:1;transform:scale(1)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.05)}}@keyframes shake{0%,to{transform:translate(0)}20%{transform:translate(-8px)}40%{transform:translate(8px)}60%{transform:translate(-5px)}80%{transform:translate(5px)}}@keyframes correctPop{0%{transform:scale(1)}50%{transform:scale(1.08)}to{transform:scale(1)}}@media(max-width:500px){.header h1{font-size:2rem}.learn-grid{grid-template-columns:repeat(auto-fill,minmax(110px,1fr));gap:.75rem}.number-card .big-number{font-size:2.2rem}.detail-card .big-number{font-size:4.5rem}.quiz-objects{font-size:2rem}.quiz-option{font-size:1.2rem;padding:.8rem}.nav-tab{padding:.5rem 1rem;font-size:.9rem}}