:root {
  color-scheme: light;
  --page: #fbf7ef;
  --surface: #fffcf6;
  --ink: #3e3a35;
  --muted: #746e66;
  --faint: #9a9289;
  --line: #e5dcd0;
  --accent: #765848;
  --accent-soft: #f0e6d7;
  --content: 68rem;
  --reading: 46rem;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 20rem;
  margin: 0;
  color: var(--ink);
  background: var(--page);
  font-family: "Zen Kaku Gothic New", "Hiragino Kaku Gothic ProN",
    "Yu Gothic", "Meiryo", sans-serif;
  font-size: 1rem;
  line-height: 1.9;
  letter-spacing: 0.03em;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-underline-offset: 0.22em;
  text-decoration-thickness: 1px;
}

a:hover {
  text-decoration-thickness: 2px;
}

a:focus-visible {
  outline: 3px solid #b99b88;
  outline-offset: 4px;
  border-radius: 2px;
}

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

.header-inner,
.footer-inner,
.wide-container {
  width: min(calc(100% - 3rem), var(--content));
  margin-inline: auto;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem 3rem;
  min-height: 5.5rem;
}

.brand {
  display: inline-flex;
  flex: none;
  align-items: center;
  gap: 0.62rem;
  color: var(--ink);
  font-family: "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: 1.12rem;
  font-weight: 600;
  letter-spacing: 0.09em;
  text-decoration: none;
}

.brand-mark {
  width: 1.15rem;
  height: 1.15rem;
  color: var(--accent);
}

.site-nav ul,
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 1.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav a,
.footer-links a {
  color: var(--muted);
  font-size: 0.86rem;
  text-decoration: none;
}

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

main {
  display: block;
}

.hero {
  padding-top: clamp(5rem, 12vw, 9rem);
  padding-bottom: clamp(1.5rem, calc(12vw - 3.5rem), 5.5rem);
  border-bottom: 1px solid var(--line);
}

.hero-inner {
  max-width: 50rem;
}

.eyebrow {
  margin: 0 0 1.5rem;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.18em;
}

h1,
h2,
h3 {
  font-family: "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-weight: 600;
  line-height: 1.55;
}

h1 {
  max-width: 15em;
  margin: 0;
  font-size: clamp(2rem, 5.5vw, 3.5rem);
  letter-spacing: 0.07em;
}

.lead {
  max-width: 42rem;
  margin: 2.25rem 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.08rem);
}

.hero-store-link {
  margin-top: 5.75rem;
}

.section {
  padding-block: clamp(4rem, 9vw, 7rem);
}

.section + .section {
  border-top: 1px solid var(--line);
}

.section-heading {
  margin: 0 0 2.5rem;
  font-size: clamp(1.5rem, 3vw, 2rem);
  letter-spacing: 0.08em;
}

.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-block: 1px solid var(--line);
}

.feature {
  padding: 2rem 1.8rem 2.2rem;
}

.feature + .feature {
  border-left: 1px solid var(--line);
}

.feature-number {
  color: var(--faint);
  font-family: serif;
  font-size: 0.8rem;
}

.feature h3 {
  margin: 0.85rem 0 0.7rem;
  font-size: 1.12rem;
}

.feature p,
.download-copy {
  margin: 0;
  color: var(--muted);
  font-size: 0.94rem;
}

.download-placeholder {
  max-width: 42rem;
  padding: 1.6rem 1.8rem;
  border-left: 3px solid #ad8b77;
  background: var(--surface);
}

.store-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.store-links:empty {
  display: none;
}

.store-link {
  display: inline-flex;
  border-radius: 0.45rem;
}

.store-link img {
  display: block;
  width: auto;
  height: 2.75rem;
}

.document {
  width: min(calc(100% - 3rem), var(--reading));
  margin-inline: auto;
  padding-block: clamp(4rem, 9vw, 7rem);
}

.document-header {
  margin-bottom: 3.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--line);
}

.document h1 {
  font-size: clamp(1.9rem, 4.5vw, 2.7rem);
}

.document-intro {
  margin: 1.4rem 0 0;
  color: var(--muted);
}

.document-section + .document-section {
  margin-top: 2.8rem;
}

.document h2 {
  margin: 0 0 0.85rem;
  font-size: 1.25rem;
  letter-spacing: 0.06em;
}

.document p,
.document li {
  color: #514c46;
}

.document ul,
.document ol {
  padding-left: 1.4rem;
}

.document-meta {
  margin-top: 4rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.88rem;
}

.document-meta p {
  margin: 0.15rem 0;
}

.contact-card {
  margin-top: 2.5rem;
  padding: clamp(1.5rem, 5vw, 2.5rem);
  border: 1px solid var(--line);
  background: var(--surface);
}

.contact-label {
  margin: 0 0 0.4rem;
  color: var(--muted);
  font-size: 0.82rem;
}

.contact-email {
  margin: 0;
  font-family: serif;
  font-size: clamp(1.25rem, 4vw, 1.65rem);
}

.contact-note {
  margin: 2rem 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.site-footer {
  padding-block: 2.8rem;
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1.2rem 3rem;
  align-items: center;
}

.footer-brand {
  margin: 0;
  font-family: "Yu Mincho", "Hiragino Mincho ProN", serif;
  letter-spacing: 0.08em;
}

.copyright {
  grid-column: 1 / -1;
  margin: 0;
  color: var(--faint);
  font-size: 0.78rem;
}

@media (max-width: 44rem) {
  .header-inner {
    align-items: flex-start;
    flex-direction: column;
    min-height: auto;
    padding-block: 1.3rem;
  }

  .site-nav ul {
    gap: 0.35rem 1.1rem;
  }

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

  .feature {
    padding-inline: 0;
  }

  .feature + .feature {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .footer-inner {
    grid-template-columns: 1fr;
  }

  .copyright {
    grid-column: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}