header .header{background:#000}header .header .header-container{width:100%;max-width:var(--container-width);margin:auto}footer .footer{background:#000}footer .footer .footer-container{width:100%;max-width:var(--container-width);margin:0 auto}#app{height:auto;min-height:100%;display:grid;margin:0 auto;grid-template-rows:minmax(0,auto) minmax(0,1fr) minmax(0,auto) repeat(auto-fit,0)}#app>header{grid-row:1}#app>main{grid-row:2}#app>footer{grid-row:3}