:root {
  --paper: #f7f1e5;
  --paper-deep: #efe3cf;
  --surface: #fffaf1;
  --ink: #24201b;
  --muted: #665b4d;
  --line: #d8c7a9;
  --accent: #8a5a20;
  --accent-deep: #5c3716;
  --gold: #b38a31;
  --shadow: rgba(36, 32, 27, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(179, 138, 49, 0.12), transparent 32rem),
    linear-gradient(180deg, var(--paper), #fbf7ee 42%, var(--paper-deep));
  color-scheme: light;
  font-family: "Hiragino Mincho ProN", "Yu Mincho", "YuMincho", "Noto Serif JP", serif;
  line-height: 1.8;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
}

a {
  color: var(--accent-deep);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.22em;
}

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

a:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 10;
  padding: 8px 12px;
  border-radius: 8px;
  background: var(--accent-deep);
  color: #fffaf1;
  font-weight: 700;
  text-decoration: none;
  transform: translateY(-150%);
  transition: transform 120ms ease-out;
}

.skip-link:focus-visible {
  color: #fffaf1;
  transform: translateY(0);
}

.site-shell {
  width: min(100%, 920px);
  margin: 0 auto;
  padding: 28px 20px 48px;
}

.site-header {
  padding: 28px 0 18px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid var(--gold);
  border-radius: 50%;
  background: var(--surface);
  color: var(--accent-deep);
  font-weight: 700;
  line-height: 1;
  box-shadow: 0 8px 18px var(--shadow);
}

.brand-text {
  display: grid;
  gap: 0;
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0;
}

.brand-subtitle {
  color: var(--muted);
  font-size: 0.9rem;
}

.hero {
  padding: 56px 0 34px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent-deep);
  font-size: 0.92rem;
  font-weight: 700;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 7vw, 3.6rem);
  line-height: 1.25;
  letter-spacing: 0;
}

.lead {
  max-width: 680px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.text-nowrap {
  white-space: nowrap;
}

.page {
  margin-top: 30px;
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 250, 241, 0.88);
  box-shadow: 0 18px 42px var(--shadow);
}

.page-header {
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.updated {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.nav-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 34px 0 0;
}

.nav-card {
  display: block;
  min-height: 168px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--ink);
  text-decoration: none;
  box-shadow: 0 14px 30px var(--shadow);
}

.nav-card:hover {
  border-color: var(--gold);
  color: var(--ink);
}

.nav-card strong {
  display: block;
  margin-bottom: 10px;
  color: var(--accent-deep);
  font-size: 1.18rem;
}

.nav-card span {
  color: var(--muted);
  font-size: 0.96rem;
}

h2 {
  margin: 34px 0 12px;
  padding-left: 12px;
  border-left: 4px solid var(--gold);
  font-size: 1.28rem;
  line-height: 1.45;
  letter-spacing: 0;
}

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

p,
ul,
ol {
  margin: 0 0 18px;
}

ul,
ol {
  padding-left: 1.4em;
}

li + li {
  margin-top: 8px;
}

.notice {
  margin: 24px 0;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-left: 5px solid var(--accent);
  border-radius: 8px;
  background: #fffdf8;
}

.contact-box {
  margin: 22px 0;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fffdf8;
}

.contact-label {
  margin: 0 0 4px;
  color: var(--muted);
  font-size: 0.9rem;
}

.mail {
  margin: 0;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 1rem;
  overflow-wrap: anywhere;
}

.back-link {
  display: inline-block;
  margin-top: 28px;
  font-weight: 700;
}

.site-footer {
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-bottom: 12px;
}

.footer-nav a {
  font-weight: 700;
}

@media (max-width: 720px) {
  .site-shell {
    padding: 20px 16px 36px;
  }

  .site-header {
    padding-top: 18px;
  }

  .hero {
    padding: 40px 0 24px;
  }

  .page {
    margin-top: 22px;
    padding: 24px 18px;
  }

  .nav-grid {
    grid-template-columns: 1fr;
  }

  .nav-card {
    min-height: auto;
  }
}