*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  background: var(--color-surface);
  color: #1f2937;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN",
    "Hiragino Sans", "Yu Gothic Medium", "Yu Gothic", "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; padding: 0; }
:lang(ja) p, :lang(ja) h1, :lang(ja) h2, :lang(ja) h3, :lang(ja) li, :lang(ja) td { line-break: strict; }
.l-ja .en, .l-en .ja { display: none !important; }

.container {
  width: 100%;
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 24px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(245, 245, 240, 0.85);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--color-cream-200);
}
.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}
.brand-mark {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--color-primary);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.02em;
  box-shadow: var(--shadow-sm);
}
.brand-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-primary-dark);
  letter-spacing: 0.01em;
}
.nav {
  display: flex;
  gap: 28px;
  align-items: center;
}
.nav a {
  font-size: 14px;
  font-weight: 500;
  color: #374151;
  transition: color .15s ease;
}
.nav a:hover { color: var(--color-primary-dark); }

.lang {
  display: flex;
  align-items: center;
  gap: 2px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: #9ca3af;
  margin-right: -6px;
}
.lang button {
  padding: 4px 6px;
  border-radius: 6px;
  color: #374151;
  transition: color .15s ease, background .15s ease;
}
.lang button:hover { color: var(--color-primary-dark); }
.lang button[aria-pressed="true"] {
  color: var(--color-primary-dark);
  background: var(--color-cream-200);
}

.page-head { padding: 72px 0 32px; }
.eyebrow {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-secondary);
}

main { padding-bottom: 40px; }
.doc {
  max-width: 820px;
  background: #ffffff;
  border-radius: 16px;
  box-shadow: var(--shadow-sm);
  padding: 56px 64px;
  line-height: 1.85;
}
.doc h1 {
  font-size: 34px;
  line-height: 1.3;
  letter-spacing: -0.01em;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin: 0 0 40px;
  text-wrap: pretty;
}
.doc h2 {
  font-size: 19px;
  line-height: 1.5;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin: 40px 0 14px;
  padding-top: 36px;
  border-top: 1px solid var(--color-cream-200);
  scroll-margin-top: 88px;
}
.doc h1 + h2 { margin-top: 0; }
.doc h3 {
  font-size: 16px;
  line-height: 1.6;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin: 28px 0 8px;
}
.doc p, .doc li {
  font-size: 15px;
  color: #374151;
  overflow-wrap: anywhere;
}
.doc p { margin: 0 0 12px; }
.doc ol, .doc ul { margin: 0 0 16px; padding-left: 1.7em; }
.doc ol { list-style: decimal; }
.doc ol.marked { list-style: none; padding-left: 0; }
.doc li { margin: 6px 0; padding-left: 0.2em; }
.doc li::marker { color: var(--color-primary); font-weight: 600; }

.table-wrap {
  margin: 20px 0 28px;
  border: 1px solid var(--color-cream-200);
  border-radius: 12px;
  overflow: hidden;
}
.doc table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  line-height: 1.7;
}
.doc th, .doc td {
  text-align: left;
  vertical-align: top;
  padding: 14px 18px;
}
.doc tr + tr td { border-top: 1px solid var(--color-cream-200); }
.doc th {
  font-weight: 600;
  color: var(--color-primary-dark);
  background: var(--color-cream-100);
  white-space: nowrap;
}
.doc td { color: #1f2937; }
.doc td:first-child { width: 34%; font-weight: 600; }

footer {
  padding: 48px 0 calc(56px + env(safe-area-inset-bottom, 0px));
  border-top: 1px solid var(--color-cream-200);
  margin-top: 40px;
}
.footer-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}
.copyright {
  font-size: 13px;
  color: #6b7280;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  font-size: 13px;
}
.footer-links a {
  color: #6b7280;
  text-decoration: none;
}
.footer-links a:hover { text-decoration: underline; }
.footer-brand {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-primary-dark);
  letter-spacing: 0.02em;
}

@media (max-width: 720px) {
  .nav { gap: 18px; }
  .nav a { font-size: 13px; }
  .page-head { padding: 48px 0 24px; }
  .doc { padding: 36px 24px; }
  .doc h1 { font-size: 26px; margin-bottom: 28px; }
  .doc h2 { font-size: 17px; margin-top: 32px; padding-top: 28px; }
}

@media (max-width: 420px) {
  .header-row { gap: 10px; }
  .brand, .nav a { white-space: nowrap; }
  .nav:has(.lang) { gap: 10px; }
  .nav:has(.lang) a { font-size: 12px; }
  .lang > span { display: none; }
  .lang { font-size: 11px; margin-right: -3px; }
  .lang button { padding: 3px; }
  .doc { padding: 28px 18px; border-radius: 12px; }
}

@media (max-width: 600px) {
  .doc thead { display: none; }
  .doc table, .doc tbody, .doc tr, .doc td { display: block; width: auto; }
  .doc tr { padding: 12px 16px; }
  .doc tr + tr { border-top: 1px solid var(--color-cream-200); }
  .doc td, .doc td:first-child, .doc tr + tr td { width: auto; padding: 4px 0; border: 0; }
  .doc td::before {
    content: attr(data-label);
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--color-primary-dark);
  }
  .doc td:first-child {
    margin: -12px -16px 8px;
    padding: 10px 16px;
    background: var(--color-cream-100);
    color: var(--color-primary-dark);
  }
}

@media print {
  body { background: #fff; color: #000; font-size: 10.5pt; }
  .site-header { position: static; background: none; backdrop-filter: none; -webkit-backdrop-filter: none; border: 0; }
  .header-row { height: auto; padding-bottom: 16pt; }
  .nav, footer, .page-head { display: none; }
  .container { max-width: none; padding: 0; }
  .doc { max-width: none; padding: 0; box-shadow: none; border-radius: 0; line-height: 1.7; }
  .doc h1, .doc h2, .doc h3, .doc th, .doc td, .doc p, .doc li { color: #000; }
  .doc h1 { font-size: 20pt; }
  .doc p, .doc li { font-size: inherit; }
  .doc h2 { break-after: avoid; page-break-after: avoid; margin-top: 1.6em; padding-top: 1.2em; }
  .doc h3 { break-after: avoid; page-break-after: avoid; }
  .doc tr, .doc li { break-inside: avoid; }
  .table-wrap { overflow: visible; }
}