:root {
  --ink: #171717;
  --paper: #fbfaf7;
  --panel: #ffffff;
  --line: #dedbd3;
  --accent: #16645a;
  --muted: #666158;
  --radius: 8px;
}
body { margin: 0; }
body { font-family: ui-serif, Georgia, Cambria, serif; }
body { color: var(--ink); }
body { background: var(--paper); }
body { line-height: 1.7; }
main { max-width: 820px; }
main { margin: 0 auto; }
main { padding: 3rem 2rem 5rem; }
h1 { font-size: 3rem; }
h1 { line-height: 1; }
h1 { margin: 1rem 0; }
h2 { margin-top: 2.4rem; }
h2 { padding-top: 1.2rem; }
h2 { border-top: 1px solid var(--line); }
a { color: var(--accent); }
.feature-card { border: 1px solid var(--line); }
.feature-card { background: var(--panel); }
.feature-card { padding: 1rem; }
.feature-card { border-radius: var(--radius); }