body {
    font-family: sans-serif;
    display: grid;
    grid-template:
	"h h h" auto
	". c ." auto
	"f f f" auto / 1fr min(70ch, 100% - 4rem) 1fr;
    background: #faf7f3;
}

p { line-height: 1.4; }

body>div { grid-area: h; }
main { grid-area: c; }
footer { grid-area: f; }

figure { margin: 0; }
img {
    display: block;
    max-width: 100%;
    height: auto;
}