:root {
  --bg: #0b0e14;
  --bg-alt: #11151f;
  --text: #eef1f6;
  --text-dim: #9aa3b2;
  --accent: #4fd1c5;
  --border: #1e2430;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #ffffff;
    --bg-alt: #f5f7fa;
    --text: #14181f;
    --text-dim: #565f6f;
    --accent: #0f9d8f;
    --border: #e4e8ee;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
.wrap { max-width: 760px; margin: 0 auto; padding: 0 24px; }
header.site {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 0;
  border-bottom: 1px solid var(--border);
}
.logo { font-weight: 700; font-size: 1.15rem; letter-spacing: -0.02em; text-decoration: none; color: var(--text); }
.logo span { color: var(--accent); }
header.site a.back { color: var(--text-dim); text-decoration: none; font-size: 0.95rem; }
header.site a.back:hover { color: var(--text); }
main { padding: 40px 0 64px; }
h1 { font-size: 2rem; letter-spacing: -0.025em; margin: 0 0 6px; }
.updated { color: var(--text-dim); font-size: 0.9rem; margin: 0 0 36px; }
h2 { font-size: 1.15rem; margin: 34px 0 10px; letter-spacing: -0.01em; }
p, li { color: var(--text-dim); }
p { margin: 0 0 14px; }
ul { padding-left: 22px; margin: 0 0 14px; }
li { margin-bottom: 7px; }
strong { color: var(--text); font-weight: 600; }
a { color: var(--accent); }
footer {
  border-top: 1px solid var(--border);
  padding: 24px 0 40px;
  color: var(--text-dim);
  font-size: 0.85rem;
  display: flex;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
}
footer a { color: var(--text-dim); text-decoration: none; }
footer a:hover { color: var(--text); }
footer nav { display: flex; gap: 18px; }