button{-webkit-appearance:none;-moz-appearance:none;appearance:none;background:#b5179e;outline:auto;border:none;cursor:pointer;display:block;width:100px;height:100px;font-size:48px;margin:0 .5rem;color:#480ca8;font-weight:700;background-color:#4361ee;border-radius:1rem;transition:.4s}button:hover{opacity:.7;transform:scale(.95)}button.clicked,button:active{transform:scale(1.1);box-shadow:0 0 6px rgba(0,0,0,.7)}#app{font-family:Avenir,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-align:center;color:#3a0ca3;margin-top:60px;font-size:80px}.keys{display:flex;align-items:center;justify-content:center}