:root {
  --sand: #f4ece4;
  --ink: #21262b;
  --muted: #5f666c;
  --copper: #c17f59;
  --card: #fff;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--sand);
  color: var(--ink);
  line-height: 1.55;
}
header, main, footer { max-width: 760px; margin: 0 auto; padding: 24px 20px; }
header h1 { margin: 0 0 6px; font-size: 1.7rem; }
header p { margin: 0; color: var(--muted); }
nav { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 16px; }
nav a, main a { color: var(--copper); }
.card {
  background: var(--card);
  border-radius: 16px;
  padding: 22px;
  margin: 16px 0;
  box-shadow: 0 8px 24px rgba(0,0,0,.06);
}
h2 { font-size: 1.2rem; margin-top: 0; }
.es { color: var(--muted); }
footer { color: var(--muted); font-size: .9rem; }
ul { padding-left: 1.2rem; }