#main{flex-direction:row}nav{flex-shrink:0;padding:2rem;width:15rem;font-weight:300}nav li{font-size:1.6rem;text-align:left}header{flex-shrink:0}header h1{position:sticky;top:1.5rem}header img{width:4.5rem}main{max-width:60rem}main .page{max-width:40rem}