#app{font-family:Avenir,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-align:center;color:#2c3e50}a-scene{margin-top:90px;background-color:#000}.container{width:100%;height:100vh;display:flex;align-items:center}.wrapper{align-content:center;width:100%}.wrapper button{width:10rem;height:3rem;border-radius:5px;background-color:blue;color:#fff;font-weight:900}.wrapper button:hover{background-color:lime;color:#000}