:root {
  color-scheme: light;
  --background: #f7f5ee;
  --surface: #fffefa;
  --text: #181a1b;
  --muted: #5d6469;
  --line: #ddd8cc;
  --accent: #0f766e;
  --accent-soft: #dff5ee;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

.page {
  width: min(860px, calc(100% - 32px));
  margin: 0 auto;
  padding: 48px 0;
}

.document {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: clamp(24px, 5vw, 52px);
  box-shadow: 0 18px 60px rgba(24, 26, 27, 0.08);
}

.topline {
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  margin: 0 0 10px;
  text-transform: uppercase;
}

h1 {
  font-size: clamp(2rem, 6vw, 3.5rem);
  line-height: 1.05;
  margin: 0 0 12px;
}

h2 {
  border-top: 1px solid var(--line);
  font-size: 1.12rem;
  margin: 32px 0 10px;
  padding-top: 22px;
}

h3 {
  font-size: 1rem;
  margin: 22px 0 6px;
}

p,
li {
  color: var(--muted);
  font-size: 1rem;
}

ul {
  padding-left: 1.25rem;
}

a {
  color: var(--accent);
  font-weight: 650;
}

code {
  background: var(--accent-soft);
  border-radius: 6px;
  color: #0b4f49;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.92em;
  padding: 0.15rem 0.35rem;
}

.updated {
  color: var(--muted);
  margin: 0 0 28px;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.nav a {
  background: var(--accent);
  border-radius: 999px;
  color: #fff;
  display: inline-flex;
  padding: 10px 16px;
  text-decoration: none;
}

.note {
  background: var(--accent-soft);
  border: 1px solid rgba(15, 118, 110, 0.18);
  border-radius: 10px;
  color: #22423f;
  padding: 14px 16px;
}

footer {
  color: var(--muted);
  font-size: 0.92rem;
  margin-top: 24px;
  text-align: center;
}