:root {
  --bg: #E0E5EA;
  --card: #FFFFFF;
  --ink: #111418;
  --ink-soft: #46525C;
  --line: #C6CFD7;
  --warn-bg: #FBEFEC;
  --warn-line: #D9A79A;
  --warn-ink: #8C4E58;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Arial, sans-serif;
  line-height: 1.6;
}
.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}
.nav {
  display: flex;
  gap: 18px;
  margin-bottom: 32px;
  font-size: 14px;
}
.nav a { color: var(--ink-soft); text-decoration: none; }
.nav a:hover { text-decoration: underline; }
h1 {
  font-size: 30px;
  margin: 0 0 6px;
}
.meta {
  color: var(--ink-soft);
  font-size: 13px;
  margin-bottom: 28px;
}
h2 {
  font-size: 19px;
  margin: 36px 0 10px;
}
p, li { font-size: 15.5px; color: var(--ink); }
ul { padding-left: 20px; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 20px 22px;
  margin: 18px 0;
}
.warn {
  background: var(--warn-bg);
  border: 1px solid var(--warn-line);
  color: var(--warn-ink);
  border-radius: 10px;
  padding: 16px 18px;
  font-size: 14px;
  margin: 18px 0 28px;
}
.warn b { display: block; margin-bottom: 4px; }
a.btn {
  display: inline-block;
  background: var(--ink);
  color: #fff;
  text-decoration: none;
  padding: 12px 20px;
  border-radius: 8px;
  font-size: 14px;
  margin-top: 8px;
}
code { background: rgba(0,0,0,0.06); padding: 2px 6px; border-radius: 4px; font-size: 14px; }
footer { margin-top: 60px; color: var(--ink-soft); font-size: 12.5px; }