.tabs-container{flex-wrap:wrap;justify-content:center;gap:.5rem;margin-bottom:2rem;display:flex}.tab-btn{color:#475569;cursor:pointer;background:#fff;border:1px solid #e2e8f0;border-radius:99px;padding:.8rem 1.2rem;font-size:.95rem;font-weight:700;transition:all .2s;box-shadow:0 2px 4px #00000005}.tab-btn:hover{transform:translateY(-2px);box-shadow:0 4px 6px #0000000d}.tab-btn.active{color:#fff;background:#166534;border-color:#166534}.glass-panel{background:#fafaf9;border:1px solid #e2e8f0cc;border-radius:24px;min-height:500px;padding:2.5rem;box-shadow:0 10px 25px -5px #0000000d}.tab-content{animation:.4s ease-out fadeIn;display:none}.tab-content.active{display:block}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.module-title{text-align:center;color:#0f172a;margin-top:0;margin-bottom:2rem;font-size:1.8rem}.visualizer{flex-wrap:wrap;justify-content:space-evenly;gap:2rem;margin-bottom:2rem;display:flex}.shape-container{flex-direction:column;align-items:center;gap:1rem;display:flex}.shape-container p{color:#475569;margin:0;font-weight:600}.canvas-group{flex-wrap:wrap;justify-content:center;gap:.5rem;max-width:100%;display:flex}.glass-canvas{aspect-ratio:1;background:#fff;border:2px dashed #cbd5e1;border-radius:20px;width:100%;max-width:250px;box-shadow:0 4px 6px -1px #0000000d}.canvas-group .glass-canvas{max-width:150px}.fraction-horizontal{color:#166534;flex-direction:column;align-items:center;font-size:2.5rem;font-weight:800;line-height:1.1;display:inline-flex}.fraction-horizontal .num{text-align:center;border-bottom:4px solid #166534;padding:0 .5rem}.fraction-horizontal .den{text-align:center;padding:0 .5rem}.fraction-reader{background:#f0fdf4;border:1px solid #bbf7d0;border-radius:20px;justify-content:center;align-items:center;gap:1.5rem;max-width:650px;margin:0 auto 2rem;padding:1rem 2rem;font-size:1.8rem;font-weight:800;display:flex}.fraction-reader .fraction-horizontal{font-size:1.8rem}.controls-grid{flex-wrap:wrap;justify-content:center;gap:2rem;display:flex}.control-box{background:#fff;border:1px solid #e2e8f0;border-radius:16px;flex:1;min-width:250px;max-width:400px;padding:1.5rem;box-shadow:0 2px 4px #00000005}.control-box h4{color:#334155;margin-top:0;margin-bottom:1rem;font-size:1.1rem}.input-group{flex-direction:column;gap:.8rem;display:flex}.input-group label{color:#475569;justify-content:space-between;align-items:center;font-size:.95rem;font-weight:600;display:flex}.input-group input[type=number],.input-group select{text-align:center;color:#0f172a;border:1px solid #cbd5e1;border-radius:8px;outline:none;width:130px;padding:.5rem;font-weight:600;transition:border-color .2s}.input-group input[type=number]:focus,.input-group select:focus{border-color:#166534}.input-group input[type=color]{cursor:pointer;border:none;border-radius:8px;width:100px;height:35px;padding:0}.comparison-symbol{color:#22c55e;align-items:center;font-size:4rem;font-weight:800;display:flex}.controls-center{flex-direction:column;align-items:center;gap:1.5rem;margin-top:2rem;display:flex}.action-buttons{flex-wrap:wrap;justify-content:center;gap:1rem;display:flex}.btn-action{color:#166534;cursor:pointer;background:#f0fdf4;border:2px solid #22c55e;border-radius:12px;padding:.8rem 1.5rem;font-size:1.1rem;font-weight:700;transition:all .2s}.btn-action:hover{color:#fff;background:#22c55e;transform:translateY(-2px)}.btn-primary{color:#fff;cursor:pointer;background:#f59e0b;border:none;border-radius:12px;padding:1rem 2rem;font-size:1.2rem;font-weight:800;transition:all .2s;box-shadow:0 4px 12px #f59e0b4d}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 16px #f59e0b66}.feedback-msg{text-align:center;flex-direction:column;align-items:center;gap:.5rem;min-height:2rem;font-size:1.3rem;font-weight:700;display:flex}.math-equation{background:#fff;border:1px solid #e2e8f0;border-radius:20px;flex-wrap:wrap;justify-content:center;align-items:center;gap:2rem;padding:2rem;display:flex;box-shadow:0 2px 8px #00000005}.operator-lg{color:#f59e0b;font-size:3.5rem;font-weight:800}.fraction-horizontal.lg{font-size:3.5rem}.fraction-input-group{flex-direction:column;align-items:center;gap:.5rem;display:flex}.fraction-input-group input{text-align:center;color:#0f172a;border:2px solid #cbd5e1;border-radius:12px;width:80px;height:60px;font-size:2rem;font-weight:800;transition:border-color .2s}.fraction-input-group input:focus{border-color:#f59e0b;outline:none}.fraction-line{border:3px solid #166534;border-radius:2px;width:100px;margin:0}