.keypad-container{display:flex;flex-direction:column;align-items:center}.keypad{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:0 auto 20px}.waveform,.fourier{margin:0 auto 10px}.keypad button{padding:20px;font-size:1.5rem;cursor:pointer;border:1px solid #ccc;border-radius:5px;background-color:#963d5a;transition:background-color .2s}.keypad button:hover{background-color:#cd517a}canvas{border:1px solid #ccc}#root{align-items:center;max-width:1280px;margin:0 auto;padding:1rem;text-align:center}