:root{font-family:apple-system,BlinkMacSystemFont,Segoe UI,Helvetica Neue,sans-serif;line-height:1.5;font-weight:400}body{padding:0;margin:0}nav{padding:0 2rem;border-bottom:1px solid lightgrey;margin-bottom:1rem;font-size:1.2rem}#app{padding:1rem 2rem;display:grid;grid-template-columns:25% 75%;grid-template-areas:"controls scene"}#controls{grid-area:controls}#scene{grid-area:scene}ul.textures{padding:0 2rem 0 1.2rem}ul.textures li{cursor:pointer;transition:background-color .2s ease-in-out}ul.textures li:hover{background-color:#eee}ul.textures li.active{background-color:#aaa}