:root {
  --bg: #fafaf8;
  --text: #1a1a18;
  --muted: #777770;
  --line: #ddddd5;
  --max: 760px;
  --serif: Georgia, 'Times New Roman', serif;
  --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --radius: 10px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d0d0b;
    --text: #efefeb;
    --muted: #888880;
    --line: #252520;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--serif);
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 40px 20px 60px;
}

/* Navigation */
.back {
  display: inline-block;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.875rem;
  font-family: var(--sans);
  margin-bottom: 16px;
  letter-spacing: 0.01em;
}
.back:hover { color: var(--text); }

/* Typography */
h1 {
  margin: 0 0 6px;
  font-size: 2rem;
  font-weight: 600;
  letter-spacing: -0.025em;
}

h2 {
  font-size: 0.75rem;
  margin: 28px 0 8px;
  color: var(--muted);
  font-weight: 600;
  font-family: var(--sans);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.tagline {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 0.9375rem;
  font-family: var(--sans);
}

a {
  color: inherit;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
a:hover { opacity: 0.7; }

/* Card */
.card {
  margin: 28px 0;
  padding: 20px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  line-height: 1.7;
}
.card p { margin: 0 0 14px; }
.card p:last-child { margin-bottom: 0; }
.card ul {
  list-style: disc;
  padding-left: 1.4rem;
  margin: 0 0 14px;
}

/* Link lists */
.links ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
li { margin: 9px 0; }

/* Separator / aside */
.sep {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 32px 0;
}
.aside {
  color: var(--muted);
  font-size: 0.875rem;
  font-family: var(--sans);
  line-height: 1.65;
}
.aside p { margin: 0; }

/* Footer — shared across all pages */
.footer {
  margin-top: 48px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.875rem;
  font-family: var(--sans);
}
.footer p { margin: 0; }

@media (max-width: 480px) {
  .wrap { padding: 24px 16px 48px; }
  h1 { font-size: 1.625rem; }
}