:root {
  color-scheme: light;
  --bg: #f7f3ec;
  --paper: #fffdfa;
  --ink: #26211c;
  --muted: #6f6258;
  --line: #ddd0c3;
  --accent: #81502b;
  --accent-soft: #f0e0d1;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.75;
}

a {
  color: var(--accent);
}

.site-header,
main,
.site-footer {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  padding: 28px 0 12px;
}

.brand {
  margin: 0;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  margin-top: 12px;
}

nav a {
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

main {
  padding: 18px 0 52px;
}

article {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: clamp(22px, 5vw, 42px);
}

h1 {
  margin: 0 0 8px;
  font-size: clamp(28px, 7vw, 42px);
  line-height: 1.25;
  letter-spacing: 0;
}

.lead {
  margin: 0 0 20px;
  color: var(--muted);
}

.updated {
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 14px;
}

section {
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

h2 {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 20px;
  line-height: 1.35;
  letter-spacing: 0;
}

p,
li {
  font-size: 16px;
}

p {
  margin: 0;
}

ul {
  margin: 0;
  padding-left: 1.25rem;
}

.notice {
  border: 1px solid var(--accent);
  background: var(--accent-soft);
  padding: 14px 16px;
  border-radius: 8px;
}

.site-footer {
  padding: 0 0 32px;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 560px) {
  .site-header,
  main,
  .site-footer {
    width: min(100% - 24px, 920px);
  }

  article {
    padding: 20px 16px;
  }
}