body{color:#666;padding:0.5rem}
h1,h2,h3,h4,h5,h6{margin-top:0;margin-bottom:0.4rem}
h1{font-size:200%}
footer{text-align:center}
.layout-centered{display:grid;grid-template-columns:1fr 4fr 1fr}

@media (max-width:600px) {
    .layout-centered{grid-template-columns:1fr}
}