:root {
  --bg: #fbf8f1;
  --surface: #ffffff;
  --text: #24211c;
  --muted: #6b6457;
  --line: #e7e0d2;
  --accent: #c98a00;
  --accent-soft: #fdf1d3;
  --link: #8a5a00;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17150f;
    --surface: #211e17;
    --text: #f1ece2;
    --muted: #a89f8e;
    --line: #3a352a;
    --accent: #f2b72e;
    --accent-soft: #33290f;
    --link: #f5c65a;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic", Meiryo, sans-serif;
  font-size: 16px;
  line-height: 1.8;
}

.wrap {
  max-width: 680px;
  margin: 0 auto;
  padding: 0 16px;
}

header.site {
  border-bottom: 1px solid var(--line);
}

header.site .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 14px;
  padding-bottom: 14px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand img { width: 28px; height: 28px; }

nav.site a {
  color: var(--muted);
  text-decoration: none;
  margin-left: 16px;
  font-size: 14px;
}

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

main { padding: 40px 0 56px; }

h1 {
  font-size: 28px;
  line-height: 1.4;
  margin: 0 0 12px;
}

h2 {
  font-size: 19px;
  margin: 40px 0 8px;
  padding-left: 10px;
  border-left: 4px solid var(--accent);
  line-height: 1.5;
}

h3 { font-size: 16px; margin: 24px 0 4px; }

p { margin: 0 0 12px; }

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

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

ul { padding-left: 1.3em; margin: 0 0 12px; }

li { margin: 2px 0; }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px 18px;
  margin: 12px 0;
}

.links {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 10px;
}

.links a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px 16px;
  color: var(--text);
  text-decoration: none;
}

.links a:hover { border-color: var(--accent); }

.links small { color: var(--muted); }

@media (max-width: 480px) {
  .links a {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
  }
}

.mail {
  display: inline-block;
  background: var(--accent-soft);
  border-radius: 8px;
  padding: 4px 10px;
  font-weight: 700;
  word-break: break-all;
}

.en {
  margin-top: 48px;
  padding-top: 8px;
  border-top: 1px dashed var(--line);
}

.note { color: var(--muted); font-size: 14px; }

footer.site {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

footer.site .wrap {
  padding-top: 18px;
  padding-bottom: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  justify-content: space-between;
}

footer.site a { color: var(--muted); }