@import"https://fonts.googleapis.com/css2?family=Nunito:wght@400;600;700;800;900&display=swap";:root{--bg: #fdf6ff;--card-shadow: 0 8px 30px rgba(0,0,0,.08);--radius: 16px;--font: "Nunito", "Segoe UI", sans-serif}*{margin:0;padding:0;box-sizing:border-box}body{font-family:var(--font);background:var(--bg);min-height:100vh;color:#2d2d3a}#app{max-width:800px;margin:0 auto;padding:20px}.header{text-align:center;padding:30px 0 20px}.header h1{font-size:2.4rem;font-weight:900;background:linear-gradient(135deg,#ff6b6b,#ffa502,#ff6348,#ff4757);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.header p{font-size:1.1rem;color:#888;margin-top:4px}.cards{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:24px}.cards .card:last-child{grid-column:1 / -1}.card{background:#fff;border-radius:var(--radius);padding:28px 24px;cursor:pointer;box-shadow:var(--card-shadow);transition:transform .2s,box-shadow .2s;text-align:center;border:3px solid transparent}.card:hover{transform:translateY(-4px);box-shadow:0 12px 40px #0000001f}.card .icon{font-size:2.4rem;margin-bottom:8px}.card h2{font-size:1.2rem;font-weight:800}.card p{font-size:.85rem;color:#999;margin-top:4px}.card-multiplication{border-color:#ff6b6b}.card-multiplication:hover{background:#fff5f5}.card-addition{border-color:#ffa502}.card-addition:hover{background:#fff9f0}.card-percentage{border-color:#2ed573}.card-percentage:hover{background:#f0fff5}.card-fractions{border-color:#1e90ff}.card-fractions:hover{background:#f0f8ff}.card-division{border-color:#a55eea}.card-division:hover{background:#f8f0ff}.quiz{background:#fff;border-radius:var(--radius);box-shadow:var(--card-shadow);padding:32px;margin-top:20px}.quiz-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.quiz-header h2{font-size:1.4rem;font-weight:800}.back-btn{background:#eee;border:none;border-radius:10px;padding:8px 16px;font-family:var(--font);font-weight:700;font-size:.9rem;cursor:pointer;transition:background .2s}.back-btn:hover{background:#ddd}.progress-bar{height:10px;background:#eee;border-radius:5px;overflow:hidden;margin-bottom:24px}.progress-fill{height:100%;border-radius:5px;transition:width .4s ease}.question{text-align:center;font-size:2rem;font-weight:800;padding:24px 0;min-height:100px;display:flex;align-items:center;justify-content:center;gap:8px;flex-wrap:wrap}.frac{display:inline-flex;flex-direction:column;align-items:center;vertical-align:middle;margin:0 6px}.frac-num{border-bottom:2px solid #2d2d3a;padding:0 6px 2px;font-weight:800}.frac-den{padding:2px 6px 0;font-weight:800}.answer-area{display:flex;gap:12px;justify-content:center;align-items:center;flex-wrap:wrap}.answer-input{width:140px;padding:12px 16px;font-size:1.4rem;font-family:var(--font);font-weight:700;border:3px solid #ddd;border-radius:12px;text-align:center;outline:none;transition:border-color .2s}.answer-input:focus{border-color:#ffa502}.check-btn{padding:12px 28px;font-size:1.1rem;font-family:var(--font);font-weight:800;border:none;border-radius:12px;color:#fff;cursor:pointer;transition:transform .15s,opacity .2s}.check-btn:hover{transform:scale(1.05)}.check-btn:active{transform:scale(.97)}.feedback{text-align:center;margin-top:16px;font-size:1.1rem;font-weight:700;min-height:30px;transition:opacity .3s}.next-btn{display:none;margin:16px auto 0;padding:10px 24px;font-size:1rem;font-family:var(--font);font-weight:700;border:2px solid #ddd;border-radius:10px;background:#fff;cursor:pointer;transition:background .2s}.next-btn:hover{background:#f5f5f5}.results{text-align:center;padding:40px 20px}.results .score-circle{width:160px;height:160px;border-radius:50%;display:flex;flex-direction:column;align-items:center;justify-content:center;margin:0 auto 20px;font-weight:900;color:#fff;box-shadow:0 8px 30px #00000026}.score-circle .big{font-size:3rem;line-height:1}.score-circle .small{font-size:1rem;opacity:.9}.results h2{font-size:1.8rem;margin-bottom:8px}.results p{color:#888;margin-bottom:24px}.retry-btn,.home-btn{display:inline-block;padding:12px 28px;font-size:1rem;font-family:var(--font);font-weight:800;border:none;border-radius:12px;cursor:pointer;margin:0 8px;transition:transform .15s}.retry-btn:hover,.home-btn:hover{transform:scale(1.05)}.retry-btn{color:#fff}.home-btn{background:#eee;color:#333}@keyframes shake{0%,to{transform:translate(0)}20%,60%{transform:translate(-8px)}40%,80%{transform:translate(8px)}}@keyframes pop{0%{transform:scale(.8);opacity:0}50%{transform:scale(1.05)}to{transform:scale(1);opacity:1}}@keyframes confetti{0%{transform:translateY(0) rotate(0);opacity:1}to{transform:translateY(-200px) rotate(720deg);opacity:0}}.shake{animation:shake .4s ease}.pop{animation:pop .3s ease}.confetti-container{position:fixed;top:0;left:0;width:100%;height:100%;pointer-events:none;overflow:hidden;z-index:100}.confetti-piece{position:absolute;width:10px;height:10px;border-radius:2px;animation:confetti-fall 3s ease-out forwards}@keyframes confetti-fall{0%{transform:translateY(-20px) rotate(0);opacity:1}to{transform:translateY(100vh) rotate(720deg);opacity:0}}.table-toggle{text-align:center;margin-top:16px}.table-toggle button{background:none;border:2px dashed #ccc;border-radius:8px;padding:6px 14px;font-family:var(--font);font-weight:600;color:#999;cursor:pointer;font-size:.85rem}.table-toggle button:hover{border-color:#aaa;color:#666}.mult-table{display:none;margin-top:12px;font-size:.85rem;background:#fafafa;border-radius:10px;padding:12px;overflow-x:auto}.mult-table table{border-collapse:collapse;width:100%}.mult-table th,.mult-table td{padding:6px 8px;text-align:center;border:1px solid #eee}.mult-table th{background:#f0f0f0;font-weight:700}.mult-table .highlight{background:#fff3cd;font-weight:700}@media (max-width: 600px){.cards{grid-template-columns:1fr}.cards .card:last-child{grid-column:auto}.header h1{font-size:1.8rem}.question{font-size:1.5rem}.answer-input{width:110px;font-size:1.2rem}.quiz{padding:20px}}