:root {
  color-scheme: light dark;
  --bg: #f8f5ef;
  --panel: #fffdf8;
  --ink: #161412;
  --muted: #5f5a52;
  --line: #ddd4c7;
  --accent: #1d4035;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #11110f;
    --panel: #1b1a17;
    --ink: #f5f0e8;
    --muted: #b9afa1;
    --line: #38342e;
    --accent: #d6efe4;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

main {
  width: min(860px, calc(100% - 32px));
  margin: 0 auto;
  padding: 44px 0 72px;
}

header {
  margin-bottom: 28px;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

nav a {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 7px 12px;
  text-decoration: none;
}

section, .notice {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 22px;
  margin: 18px 0;
}

h1 {
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1.05;
  margin: 0 0 10px;
  letter-spacing: 0;
}

h2 {
  font-size: 1.25rem;
  line-height: 1.25;
  margin: 0 0 10px;
}

p, li {
  color: var(--muted);
}

strong {
  color: var(--ink);
}

ul {
  padding-left: 1.2rem;
}

.meta {
  color: var(--muted);
  margin: 0;
}

.warning {
  border-color: #b98729;
}

footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  margin-top: 34px;
  padding-top: 18px;
  font-size: 0.92rem;
}