:root {
  --tbb-orange: #f36a16;
  --tbb-orange-soft: #fff0e4;
  --tbb-green: #07533d;
  --tbb-green-dark: #043e2e;
  --tbb-ink: #17221e;
  --tbb-muted: #69736e;
  --tbb-line: #e7d9cd;
  --tbb-paper: #fbf7f1;
  --tbb-white: #fff;
  --content: min(1180px, calc(100vw - 40px));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--tbb-ink);
  background: var(--tbb-paper);
  font-family: Inter, "Noto Sans", "Noto Sans JP", "Noto Sans KR", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}
a { color: inherit; }
.skip-link { position: fixed; left: 12px; top: -80px; z-index: 50; background: #fff; padding: 10px 14px; }
.skip-link:focus { top: 12px; }
.language-bar { border-bottom: 1px solid var(--tbb-line); background: #fff; }
.language-bar > div { width: var(--content); margin: auto; min-height: 42px; display: flex; align-items: center; justify-content: flex-end; gap: 14px; flex-wrap: wrap; }
.language-bar span { color: var(--tbb-green); font-size: 11px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
.language-bar a { text-decoration: none; color: var(--tbb-muted); font-size: 12px; font-weight: 750; }
.language-bar a[aria-current="page"] { color: #fff; background: var(--tbb-orange); border-radius: 999px; padding: 3px 10px; }
.site-header { width: var(--content); min-height: 82px; margin: auto; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { text-decoration: none; display: flex; flex-direction: column; color: var(--tbb-green); line-height: 1.25; }
.brand strong { font-size: 17px; letter-spacing: .02em; }
.brand small { color: var(--tbb-orange); font-size: 11px; letter-spacing: .06em; text-transform: uppercase; }
.site-header nav { display: flex; align-items: center; gap: 22px; }
.site-header nav a { text-decoration: none; font-size: 14px; font-weight: 700; }
.site-header nav a:last-child { border: 1px solid var(--tbb-green); padding: 8px 13px; }
.hero { background: var(--tbb-orange); color: #fff; }
.hero-grid { width: var(--content); margin: auto; display: grid; grid-template-columns: 1.45fr .75fr; min-height: 470px; }
.hero-copy { padding: 70px 72px 64px 0; align-self: center; }
.eyebrow { margin: 0 0 18px; font-size: 12px; font-weight: 800; letter-spacing: .18em; text-transform: uppercase; }
.hero h1 { margin: 0; max-width: 820px; font-size: clamp(42px, 5.4vw, 76px); line-height: 1.03; letter-spacing: -.035em; }
.hero-lead { max-width: 780px; margin: 26px 0 30px; font-size: 18px; }
.hero-actions, .cta-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 12px 18px; background: #fff; color: var(--tbb-orange); text-decoration: none; font-weight: 800; border: 1px solid #fff; }
.button.secondary { background: transparent; color: #fff; }
.hero-note { margin-top: 22px; font-size: 13px; opacity: .9; }
.hero-note a { color: inherit; }
.hero-aside { align-self: stretch; padding: 54px 0 54px 48px; border-left: 1px solid rgba(255,255,255,.42); display: flex; flex-direction: column; justify-content: center; gap: 18px; }
.hero-aside div { border-top: 1px solid rgba(255,255,255,.42); padding-top: 14px; }
.hero-aside strong { display: block; font-size: 19px; }
.hero-aside span { display: block; font-size: 13px; opacity: .9; }
.section { width: var(--content); margin: auto; padding: 74px 0; }
.section-head { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; align-items: end; margin-bottom: 34px; }
.section-head h2, .boundary h2, .cta h2 { color: var(--tbb-green); margin: 0; font-size: clamp(30px, 3vw, 46px); line-height: 1.12; letter-spacing: -.025em; }
.section-head > p { margin: 0; color: var(--tbb-muted); }
.intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.intro-card, .evidence-card, .safeguard-card { background: #fff; border: 1px solid var(--tbb-line); border-top: 4px solid var(--tbb-orange); padding: 30px; }
.intro-card h3, .evidence-card h3, .safeguard-card h3 { margin: 0 0 12px; color: var(--tbb-green); font-size: 21px; }
.intro-card p, .evidence-card p, .safeguard-card p { margin: 0; color: var(--tbb-muted); }
.evidence-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.evidence-card a { display: inline-block; margin-top: 18px; color: var(--tbb-orange); font-weight: 800; text-decoration: none; }
.boundary-wrap { background: var(--tbb-green); color: #fff; }
.boundary { width: var(--content); margin: auto; padding: 68px 0; display: grid; grid-template-columns: .78fr 1.22fr; gap: 70px; }
.boundary h2 { color: #fff; }
.boundary-copy { font-size: 18px; }
.boundary-copy strong { color: #ffd0b1; }
.boundary-copy p { margin: 0 0 16px; }
.roles { width: 100%; border-collapse: collapse; background: #fff; }
.roles th, .roles td { padding: 20px 22px; text-align: left; vertical-align: top; border: 1px solid var(--tbb-line); }
.roles th { color: var(--tbb-green); background: #f4efe8; font-size: 14px; }
.roles td:first-child { width: 22%; color: var(--tbb-green); font-weight: 800; }
.pilot-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--tbb-line); border: 1px solid var(--tbb-line); }
.pilot-grid article { background: #fff; padding: 28px; }
.pilot-grid b { display: block; margin-bottom: 30px; color: var(--tbb-orange); font-size: 13px; }
.pilot-grid h3 { color: var(--tbb-green); font-size: 19px; margin: 0 0 10px; }
.pilot-grid p { color: var(--tbb-muted); margin: 0; font-size: 14px; }
.safeguard-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.cta-wrap { padding: 0 0 74px; }
.cta { width: var(--content); margin: auto; padding: 50px; background: var(--tbb-orange-soft); border-top: 5px solid var(--tbb-orange); display: grid; grid-template-columns: 1.3fr .7fr; gap: 50px; align-items: center; }
.cta p { margin: 16px 0 0; color: var(--tbb-muted); }
.cta .button { background: var(--tbb-orange); color: #fff; border-color: var(--tbb-orange); }
.cta .button.secondary { color: var(--tbb-green); background: #fff; border-color: var(--tbb-line); }
.site-footer { background: var(--tbb-green-dark); color: #fff; }
.site-footer > div { width: var(--content); margin: auto; min-height: 132px; display: flex; align-items: center; justify-content: space-between; gap: 26px; }
.site-footer p { margin: 5px 0 0; color: rgba(255,255,255,.72); font-size: 13px; }
.site-footer a { color: #fff; }

@media (max-width: 900px) {
  :root { --content: min(100% - 28px, 720px); }
  .site-header { padding: 14px 0; align-items: flex-start; }
  .site-header nav { gap: 10px; flex-direction: column; align-items: flex-end; }
  .hero-grid, .section-head, .boundary, .cta { grid-template-columns: 1fr; }
  .hero-copy { padding: 56px 0 34px; }
  .hero-aside { padding: 24px 0 46px; border-left: 0; border-top: 1px solid rgba(255,255,255,.42); }
  .intro-grid, .evidence-grid, .safeguard-grid { grid-template-columns: 1fr; }
  .pilot-grid { grid-template-columns: 1fr 1fr; }
  .section { padding: 54px 0; }
  .section-head, .boundary { gap: 26px; }
  .cta { padding: 34px 26px; gap: 28px; }
}

@media (max-width: 560px) {
  .language-bar > div { justify-content: flex-start; gap: 11px; padding: 8px 0; }
  .language-bar span { width: 100%; }
  .site-header { display: block; }
  .site-header nav { margin-top: 16px; flex-direction: row; align-items: center; justify-content: space-between; }
  .hero h1 { font-size: 42px; }
  .hero-lead { font-size: 16px; }
  .hero-actions .button, .cta-actions .button { width: 100%; }
  .pilot-grid { grid-template-columns: 1fr; }
  .roles, .roles tbody, .roles tr, .roles th, .roles td { display: block; }
  .roles thead { display: none; }
  .roles tr { border: 1px solid var(--tbb-line); margin-bottom: 12px; }
  .roles td { border: 0; padding: 12px 16px; width: 100% !important; }
  .site-footer > div { align-items: flex-start; flex-direction: column; padding: 30px 0; }
}

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
@media print { .language-bar, .site-header nav, .hero-actions, .cta-actions { display: none; } }