:root {
  color-scheme: light;
  --bg: #f5f0e8;
  --card: #fffdf9;
  --ink: #2b241c;
  --muted: #6b6258;
  --accent: #a94f24;
  --link: #075da8;
  --line: #e1d6c8;
}

* {
  box-sizing: border-box;
}

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

.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 24px 20px 48px;
}

header {
  margin-bottom: 24px;
}

h1 {
  margin: 0 0 8px;
  font-size: 1.75rem;
}

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

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin: 20px 0 28px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

nav a {
  color: var(--ink);
  font-weight: 700;
  text-decoration: none;
}

nav a:hover,
nav a[aria-current="page"] {
  color: var(--accent);
}

:focus-visible {
  outline: 3px solid #1673d1;
  outline-offset: 3px;
}

main {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--card);
}

h2 {
  margin: 28px 0 8px;
  font-size: 1.125rem;
}

h2:first-child {
  margin-top: 0;
}

ul {
  padding-left: 1.25rem;
}

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

footer {
  margin-top: 24px;
  color: var(--muted);
  font-size: .875rem;
}

@media (max-width: 420px) {
  .wrap {
    padding-inline: 14px;
  }

  main {
    padding: 20px 16px;
  }
}