:root{--primary:#ff6b6b;--secondary:#4ecdc4;--white:#fff;--accent:#ffe66d;--bg:#f3f3f3;--text:#292f36;--correct:#6bcb77;--wrong:#ff6b6b;--shadow:0 4px 6px #0000001a;--radius:20px;--font:"Baloo 2", cursive, sans-serif}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font);background-color:var(--bg);color:var(--text);justify-content:center;align-items:center;min-height:100vh;margin:0;display:flex}#root{width:100%;max-width:480px;padding:16px}.app{border-radius:var(--radius);box-shadow:var(--shadow);text-align:center;background:#fff;padding:24px 20px}.screen{flex-direction:column;align-items:center;gap:20px;display:flex}.mascot{font-size:4rem;animation:2s infinite bounce}@keyframes bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}.app-title{color:var(--primary);text-shadow:2px 2px 0 var(--accent);font-size:2rem}.star-display{background:var(--accent);border-radius:30px;align-items:center;gap:8px;padding:10px 20px;font-size:1.5rem;font-weight:700;display:flex}.star-icon{font-size:2rem}.language-switcher{gap:10px;display:flex}.lang-btn{border:2px solid var(--secondary);cursor:pointer;background:#fff;border-radius:20px;padding:8px 16px;font-family:inherit;font-weight:700;transition:all .2s}.lang-btn.active{background:var(--secondary);color:#fff}.primary-btn{background:var(--primary);color:#fff;cursor:pointer;box-shadow:var(--shadow);border:none;border-radius:30px;padding:14px 30px;font-family:inherit;font-size:1.2rem;font-weight:700;transition:transform .1s}.primary-btn:active{transform:scale(.95)}.quiz-screen .progress{background:var(--secondary);color:var(--white);border-radius:var(--radius);padding:.25em 2em}.quiz-screen .question{background:var(--accent);border-radius:var(--radius);padding:20px 30px;font-size:3rem;font-weight:700}.quiz-screen form{justify-content:center;gap:10px;width:100%;display:flex}.quiz-screen input{text-align:center;border:3px solid var(--secondary);border-radius:15px;width:100px;padding:10px;font-family:inherit;font-size:2rem}.quiz-screen input:disabled{background:#f0f0f0}.quiz-screen button[type=submit]{background:var(--secondary);color:#fff;cursor:pointer;border:none;border-radius:15px;padding:10px 20px;font-family:inherit;font-size:1.5rem}.feedback{border-radius:15px;padding:10px 20px;font-size:1.5rem;font-weight:700}.result-screen h2{font-size:2rem}.perfect-message{color:var(--primary);font-size:1.2rem;font-weight:700}.hard-tables{background:#f0f0f0;border-radius:15px;padding:10px 20px}.hard-tables ul{flex-wrap:wrap;justify-content:center;gap:10px;list-style:none;display:flex}.hard-tables li{background:#fff;border-radius:10px;padding:5px 10px;font-weight:700}.feedback{border-radius:15px;justify-content:center;align-items:center;min-height:60px;padding:10px 20px;font-size:1.5rem;font-weight:700;transition:background-color .2s,color .2s;display:flex}.feedback.empty{color:#0000;background:0 0}.feedback.correct{color:#155724;background:#d4edda}.feedback.wrong{color:#721c24;background:#f8d7da}