.box{position:relative;display:inline-block}.show-fps{position:absolute;color:#fffef9;text-shadow:0 0 5px #1e131d;top:5px;left:5px}button{margin:0 10px;color:#646cff;border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;transition:border-color .25s}button:not(:disabled):hover{cursor:pointer;border-color:#646cff}#app{font-family:Avenir,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-align:center;color:#2c3e50}body{background:radial-gradient(circle,#35a2ff 0%,#014a88 100%);margin:0;height:800px}