/* ============================================================
   UP JAPAN — corporate + legal shared stylesheet
   Editorial direction inherited from LP v3.
   ============================================================ */
@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,400;0,500;0,600;0,700;1,400;1,600&family=Noto+Serif+JP:wght@400;500;600;700;900&family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  --ink: #0a1530;
  --ink-2: #111e44;
  --ink-3: #1a2956;
  --paper: #f5f1e8;
  --paper-2: #ebe5d4;
  --paper-3: #e0d7bf;
  --gold: #c9a96b;
  --gold-2: #e6c87a;
  --gold-deep: #8a6d35;
  --azure: #4a7fc1;
  --line: rgba(10,21,48,0.12);
  --line-strong: rgba(10,21,48,0.25);
  --rose: #b85b5b;
  --serif-en: 'Cormorant Garamond', 'Noto Serif JP', serif;
  --serif-jp: 'Noto Serif JP', serif;
  --sans: 'Inter', 'Noto Serif JP', system-ui, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif-jp);
  font-feature-settings: "palt", "kern";
  -webkit-font-smoothing: antialiased;
  line-height: 1.85;
  font-weight: 500;
}
::selection { background: var(--ink); color: var(--paper); }

a { color: var(--ink); text-decoration: underline; text-underline-offset: 3px; text-decoration-color: var(--gold); }
a:hover { color: var(--azure); text-decoration-color: var(--azure); }

.container { max-width: 1200px; margin: 0 auto; padding: 0 32px; }
.narrow { max-width: 880px; margin: 0 auto; padding: 0 32px; }
.tight { max-width: 720px; margin: 0 auto; padding: 0 32px; }

/* ============ Topbar ============ */
.topbar {
  background: var(--ink); color: var(--paper);
  text-align: center; padding: 9px 16px;
  font-size: 12px; letter-spacing: 0.04em;
  font-weight: 400;
  border-bottom: 1px solid rgba(201,169,107,0.4);
}
.topbar b { color: var(--gold-2); font-weight: 600; }
.topbar .sep { display: inline-block; margin: 0 14px; opacity: 0.4; }

/* ============ Nav ============ */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(245,241,232,0.92);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  max-width: 1200px; margin: 0 auto; padding: 18px 32px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px;
}
.brand {
  display: flex; align-items: center; gap: 14px;
  text-decoration: none;
}
.brand-mark {
  width: 38px; height: 38px;
  background: var(--ink); color: var(--gold-2);
  display: grid; place-items: center;
  font-family: var(--serif-en); font-style: italic;
  font-weight: 600; font-size: 22px;
  border-radius: 2px;
}
.brand-text { display: flex; flex-direction: column; }
.brand-name {
  font-family: var(--serif-en); font-style: italic;
  font-weight: 600; font-size: 18px; color: var(--ink);
  letter-spacing: 0.02em; line-height: 1;
}
.brand-sub {
  font-family: var(--mono); font-size: 9px;
  color: var(--gold-deep); letter-spacing: 0.24em;
  margin-top: 4px;
}
.nav-links {
  display: flex; gap: 28px;
  font-family: var(--sans); font-size: 13px;
  letter-spacing: 0.04em; font-weight: 500;
}
.nav-links a {
  color: var(--ink); text-decoration: none;
  padding: 6px 0;
  border-bottom: 1px solid transparent;
  transition: border-color .2s;
}
.nav-links a:hover { border-bottom-color: var(--gold); }

.nav-cta {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--ink); color: var(--paper);
  padding: 11px 22px;
  font-family: var(--sans); font-size: 12px;
  letter-spacing: 0.06em; font-weight: 600;
  text-decoration: none; border-radius: 2px;
  border: 1px solid var(--ink);
  transition: background .2s, color .2s;
}
.nav-cta:hover { background: var(--gold-deep); border-color: var(--gold-deep); color: var(--paper); }

@media (max-width: 800px) {
  .nav-links { display: none; }
}

/* ============ Page hero ============ */
.page-hero {
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(ellipse 60% 100% at 100% 0%, rgba(201,169,107,0.10), transparent 60%),
    radial-gradient(ellipse 60% 100% at 0% 100%, rgba(74,127,193,0.06), transparent 60%),
    var(--paper);
  padding: 88px 0 72px;
}
.page-hero .container {
  display: grid; grid-template-columns: auto 1fr;
  gap: 56px; align-items: end;
}
.page-eyebrow {
  font-family: var(--mono); font-size: 11px;
  letter-spacing: 0.32em; text-transform: uppercase;
  color: var(--gold-deep); font-weight: 500;
}
.page-num {
  font-family: var(--serif-en); font-style: italic;
  font-weight: 500; font-size: 96px;
  color: var(--gold); line-height: .85;
  letter-spacing: -0.04em;
}
.page-title {
  font-family: var(--serif-jp); font-weight: 900;
  font-size: 44px; line-height: 1.25;
  margin: 14px 0 8px;
  letter-spacing: 0.01em;
}
.page-title em {
  font-family: var(--serif-en); font-style: italic;
  font-weight: 500; color: var(--gold-deep);
  margin-left: 12px; letter-spacing: -0.01em;
}
.page-lede {
  max-width: 720px;
  font-size: 15px; line-height: 1.9;
  color: var(--ink-2);
}
@media (max-width: 720px) {
  .page-hero { padding: 56px 0 44px; }
  .page-hero .container { grid-template-columns: 1fr; gap: 14px; }
  .page-num { font-size: 64px; }
  .page-title { font-size: 30px; }
}

/* ============ Document body (legal-style prose) ============ */
.doc {
  padding: 80px 0 120px;
}
.doc-meta {
  display: flex; gap: 32px; flex-wrap: wrap;
  font-family: var(--mono); font-size: 11px;
  color: var(--gold-deep); letter-spacing: 0.16em;
  text-transform: uppercase;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 16px 0; margin-bottom: 56px;
}
.doc-meta b { color: var(--ink); font-weight: 600; }

.doc h2 {
  font-family: var(--serif-jp);
  font-weight: 900; font-size: 22px;
  margin: 56px 0 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  display: flex; align-items: baseline; gap: 16px;
  letter-spacing: 0.02em;
}
.doc h2::before {
  content: attr(data-num);
  font-family: var(--serif-en); font-style: italic;
  font-weight: 500; color: var(--gold);
  font-size: 28px; line-height: 1;
}

.doc h3 {
  font-family: var(--serif-jp);
  font-weight: 700; font-size: 16px;
  margin: 32px 0 10px;
  letter-spacing: 0.02em;
  color: var(--ink-2);
}

.doc p {
  font-size: 14.5px; line-height: 1.95;
  margin: 0 0 14px;
  color: var(--ink-2);
}
.doc p b { color: var(--ink); }
.doc ul, .doc ol {
  margin: 8px 0 18px 24px;
  font-size: 14.5px; line-height: 1.95;
  color: var(--ink-2);
}
.doc li { margin-bottom: 6px; }
.doc li b { color: var(--ink); }

/* Definition table */
.def-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  margin: 12px 0 28px;
  font-family: var(--serif-jp);
}
.def-table th, .def-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
  text-align: left;
}
.def-table th {
  width: 220px;
  font-weight: 700; color: var(--ink);
  background: rgba(201,169,107,0.08);
  border-right: 1px solid var(--line);
  letter-spacing: 0.04em;
  font-size: 13px;
}
.def-table td { color: var(--ink-2); line-height: 1.85; }
.def-table tr:first-child th, .def-table tr:first-child td { border-top: 1px solid var(--line); }

@media (max-width: 720px) {
  .def-table, .def-table tbody, .def-table tr, .def-table th, .def-table td { display: block; width: auto; }
  .def-table th { background: var(--paper-2); border-right: none; padding: 10px 16px; font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; }
  .def-table td { padding: 12px 16px 18px; }
}

.note {
  background: rgba(74,127,193,0.06);
  border-left: 3px solid var(--azure);
  padding: 18px 22px;
  margin: 18px 0 24px;
  font-size: 14px;
  color: var(--ink-2);
  line-height: 1.85;
}
.note b { color: var(--ink); }

.warn {
  background: rgba(184,91,91,0.07);
  border-left: 3px solid var(--rose);
  padding: 18px 22px;
  margin: 18px 0 24px;
  font-size: 14px;
  color: var(--ink-2);
  line-height: 1.85;
}
.warn b { color: var(--rose); }

.toc {
  background: rgba(201,169,107,0.07);
  border-left: 3px solid var(--gold);
  padding: 22px 28px;
  margin: 0 0 56px;
  font-family: var(--sans);
  font-size: 13px;
  line-height: 2.1;
}
.toc-title {
  font-family: var(--mono); font-size: 10px;
  letter-spacing: 0.28em; text-transform: uppercase;
  color: var(--gold-deep); margin-bottom: 8px;
  font-weight: 600;
}
.toc ol { margin: 0; padding-left: 18px; columns: 2; column-gap: 32px; }
.toc li { break-inside: avoid; }
.toc a { color: var(--ink); text-decoration: none; border-bottom: 1px solid transparent; }
.toc a:hover { border-bottom-color: var(--gold); }
@media (max-width: 720px) {
  .toc ol { columns: 1; }
}

/* ============ Footer ============ */
.footer {
  background: var(--ink); color: rgba(245,241,232,0.7);
  padding: 72px 0 36px;
  font-family: var(--sans); font-size: 13px;
  line-height: 1.85;
}
.footer .container {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
}
.footer-brand .brand-mark { background: var(--gold-2); color: var(--ink); }
.footer-brand .brand-name { color: var(--paper); }
.footer-brand .brand-sub { color: var(--gold-2); }
.footer-brand p {
  margin-top: 16px; font-size: 12px;
  color: rgba(245,241,232,0.55); line-height: 1.85;
}
.footer h4 {
  font-family: var(--mono); font-size: 10px;
  letter-spacing: 0.28em; text-transform: uppercase;
  color: var(--gold-2); font-weight: 600;
  margin-bottom: 16px;
}
.footer ul { list-style: none; margin: 0; padding: 0; }
.footer li { margin-bottom: 8px; }
.footer a {
  color: rgba(245,241,232,0.75);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.footer a:hover { color: var(--gold-2); border-bottom-color: var(--gold-2); }
.footer-bottom {
  margin-top: 56px; padding-top: 24px;
  border-top: 1px solid rgba(201,169,107,0.2);
  display: flex; justify-content: space-between; align-items: center;
  font-family: var(--mono); font-size: 10px;
  letter-spacing: 0.16em; color: rgba(245,241,232,0.4);
}
@media (max-width: 800px) {
  .footer .container { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: span 2; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
}

/* ============ Buttons ============ */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 26px;
  font-family: var(--sans); font-size: 13px;
  letter-spacing: 0.06em; font-weight: 600;
  text-decoration: none; border-radius: 2px;
  border: 1px solid var(--ink); background: var(--paper);
  color: var(--ink);
  transition: background .2s, color .2s;
}
.btn:hover { background: var(--ink); color: var(--paper); }
.btn-primary { background: var(--ink); color: var(--paper); }
.btn-primary:hover { background: var(--gold-deep); border-color: var(--gold-deep); }
.btn-gold { background: var(--gold); border-color: var(--gold); color: var(--ink); }
.btn-gold:hover { background: var(--gold-deep); border-color: var(--gold-deep); color: var(--paper); }