:root {
  --bg: #f7f5f0; --text: #1c1c1c; --text-light: #5a5a5a; --text-muted: #999;
  --accent: #c45c00; --border: #e0dbd3;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg); color: var(--text); line-height: 1.7;
  -webkit-font-smoothing: antialiased; font-size: 17px;
}
a { color: var(--accent); }
.wrap { max-width: 720px; margin: 0 auto; padding: 3rem 2rem 4rem; }
.back { font-size: 0.9rem; color: var(--text-light); text-decoration: none; }
.back:hover { color: var(--text); }
h1 { font-size: 2.2rem; font-weight: 800; letter-spacing: -0.03em; margin: 1.5rem 0 0.5rem; }
.updated { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 2rem; }
h2 { font-size: 1.15rem; font-weight: 700; margin: 2rem 0 0.6rem; }
p { color: var(--text-light); margin-bottom: 1rem; }
ul { color: var(--text-light); margin: 0 0 1rem 1.2rem; }
li { margin-bottom: 0.4rem; }
footer { max-width: 720px; margin: 0 auto; padding: 2rem; border-top: 1px solid var(--border);
         color: var(--text-muted); font-size: 0.9rem; }