:root {
  color-scheme: light;
  --ink: #1c2430;
  --muted: #5c6775;
  --paper: #f6f3ee;
  --card: #fffdf9;
  --line: #e4ddd2;
  --accent: #2f6f62;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Georgia, "Iowan Old Style", Palatino, serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.55;
}
a { color: var(--accent); }
header, main, footer { max-width: 40rem; margin: 0 auto; padding: 1.25rem 1.25rem; }
header { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; }
nav { display: flex; gap: 1rem; font-family: system-ui, sans-serif; font-size: 0.95rem; }
nav a { color: var(--ink); text-decoration: none; }
nav a:hover { text-decoration: underline; }
.mark { font-weight: 700; letter-spacing: 0.01em; text-decoration: none; color: var(--ink); }
h1 { font-size: 2.1rem; line-height: 1.15; margin: 0.5rem 0 0.75rem; }
h2 { font-size: 1.35rem; margin-top: 2rem; }
p { margin: 0.7rem 0; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1rem 1.1rem;
  margin-top: 1.25rem;
}
footer {
  color: var(--muted);
  font-family: system-ui, sans-serif;
  font-size: 0.9rem;
  border-top: 1px solid var(--line);
  margin-top: 2rem;
}