:root {
  --bg: #f6f5f3;
  --surface: #ffffff;
  --text: #1c1a17;
  --muted: #6b655c;
  --border: #e0dcd5;
  --accent: #8a6a2f;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #161513;
    --surface: #201e1b;
    --text: #efece6;
    --muted: #a09990;
    --border: #322f2a;
    --accent: #d9b978;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", sans-serif;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 44rem; margin: 0 auto; padding: 3rem 1.5rem 5rem; }

.site-nav {
  font-size: .85rem;
  letter-spacing: .04em;
  margin-bottom: 2.5rem;
  color: var(--muted);
}
.site-nav a { margin-right: 1.25rem; }

header { border-bottom: 1px solid var(--border); padding-bottom: 1.75rem; margin-bottom: 2rem; }
h1 { font-size: 1.75rem; margin: 0 0 .35rem; letter-spacing: .02em; line-height: 1.4; }
.en { color: var(--muted); font-size: .95rem; margin: 0; letter-spacing: .04em; }

h2 {
  font-size: 1.05rem;
  margin: 2.75rem 0 .75rem;
  letter-spacing: .02em;
  padding-bottom: .4rem;
  border-bottom: 1px solid var(--border);
}
h3 { font-size: .98rem; margin: 1.75rem 0 .4rem; }

p { margin: 0 0 1rem; }
.lead { color: var(--muted); }

ul { margin: 0 0 1rem; padding-left: 1.25rem; }
li { margin-bottom: .35rem; }

dl { margin: 0; display: grid; grid-template-columns: 8rem 1fr; gap: .5rem 1rem; }
dt { color: var(--muted); font-size: .9rem; }
dd { margin: 0; }

a { color: var(--accent); text-underline-offset: .2em; }

.faq-q { font-weight: 600; margin: 1.5rem 0 .25rem; }
.faq-a { margin: 0 0 1rem; color: var(--muted); }

.lang-divider {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 4rem 0 2.5rem;
}

.meta { color: var(--muted); font-size: .9rem; }

footer {
  margin-top: 3.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: .85rem;
}

@media (max-width: 30rem) {
  .wrap { padding-top: 2rem; }
  dl { grid-template-columns: 1fr; gap: .1rem 0; }
  dd { margin-bottom: .75rem; }
}