:root {
  color-scheme: light;
  --ink: #0b1724;
  --muted: #526474;
  --line: #d7e1e8;
  --paper: #f7fafc;
  --white: #ffffff;
  --navy: #081a2d;
  --navy-soft: #102a43;
  --teal: #0b7f7a;
  --teal-dark: #075f5c;
  --teal-pale: #dff5f2;
  --blue-pale: #eaf2f8;
  --focus: #f6b73c;
  --shadow: 0 18px 50px rgba(8, 26, 45, 0.1);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-size: 1rem;
  line-height: 1.65;
}

a {
  color: var(--teal-dark);
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--navy-soft);
}

a:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 4px;
  border-radius: 0.2rem;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -5rem;
  z-index: 10;
  background: var(--white);
  color: var(--ink);
  padding: 0.7rem 1rem;
  border-radius: 0.4rem;
}

.skip-link:focus {
  top: 1rem;
}

.site-header {
  background: var(--navy);
  color: var(--white);
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
}

.header-inner,
.page-shell,
.footer-inner {
  width: min(70rem, calc(100% - 2rem));
  margin-inline: auto;
}

.header-inner {
  min-height: 4.8rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--white);
  font-weight: 750;
  letter-spacing: -0.015em;
  text-decoration: none;
}

.brand-mark {
  width: 2.25rem;
  height: 2.25rem;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.52);
  border-radius: 0.65rem;
  background: linear-gradient(145deg, var(--teal), var(--navy-soft));
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}

.site-nav ul {
  display: flex;
  gap: 1.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav a {
  color: #dce8f1;
  font-size: 0.94rem;
  font-weight: 650;
  text-decoration: none;
}

.site-nav a[aria-current="page"],
.site-nav a:hover {
  color: var(--white);
  text-decoration: underline;
  text-decoration-color: #52d6ce;
  text-decoration-thickness: 0.18rem;
  text-underline-offset: 0.5rem;
}

.hero {
  color: var(--white);
  background:
    radial-gradient(circle at 85% 5%, rgba(29, 173, 164, 0.28), transparent 31rem),
    linear-gradient(135deg, var(--navy) 0%, #0d2740 100%);
  padding: clamp(4.5rem, 10vw, 8rem) 0;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(17rem, 0.75fr);
  align-items: center;
  gap: clamp(2rem, 7vw, 6rem);
}

.eyebrow {
  margin: 0 0 1rem;
  color: #82e4de;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin-top: 0;
  line-height: 1.13;
  letter-spacing: -0.025em;
}

h1 {
  max-width: 13ch;
  margin-bottom: 1.35rem;
  font-size: clamp(2.7rem, 7vw, 5.3rem);
  font-weight: 790;
}

h2 {
  margin-bottom: 1rem;
  font-size: clamp(1.75rem, 4vw, 2.45rem);
}

h3 {
  margin-bottom: 0.7rem;
  font-size: 1.16rem;
}

.lede {
  max-width: 43rem;
  margin: 0;
  color: #dce8f1;
  font-size: clamp(1.08rem, 2.3vw, 1.3rem);
  line-height: 1.6;
}

.boundary-card {
  padding: 1.6rem;
  border: 1px solid rgba(255, 255, 255, 0.26);
  border-radius: 1rem;
  background: rgba(5, 20, 34, 0.58);
  box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
}

.boundary-card p {
  margin: 0;
}

.boundary-label {
  color: #82e4de;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.boundary-value {
  margin-top: 0.45rem !important;
  font-size: 1.22rem;
  font-weight: 750;
}

.boundary-detail {
  margin-top: 1rem !important;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  color: #dce8f1;
  font-size: 0.93rem;
}

.page-shell {
  padding-block: clamp(3.2rem, 7vw, 6rem);
}

.section-intro {
  max-width: 48rem;
  margin-bottom: 2.25rem;
  color: var(--muted);
  font-size: 1.08rem;
}

.fact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.fact-card,
.content-card {
  border: 1px solid var(--line);
  border-radius: 0.9rem;
  background: var(--white);
  box-shadow: 0 8px 30px rgba(8, 26, 45, 0.055);
}

.fact-card {
  padding: 1.4rem;
}

.fact-card p,
.content-card p:last-child,
.content-card ul:last-child {
  margin-bottom: 0;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
  padding: 0.32rem 0.65rem;
  border-radius: 999px;
  background: var(--teal-pale);
  color: var(--teal-dark);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.status::before {
  width: 0.48rem;
  height: 0.48rem;
  border-radius: 50%;
  background: var(--teal);
  content: "";
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: start;
  padding-top: clamp(3rem, 7vw, 6rem);
}

.plain-list,
.check-list {
  padding-left: 1.2rem;
}

.plain-list li,
.check-list li {
  margin-bottom: 0.7rem;
}

.check-list {
  padding-left: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 1.9rem;
}

.check-list li::before {
  position: absolute;
  left: 0;
  top: 0.08rem;
  color: var(--teal);
  font-weight: 900;
  content: "✓";
}

.callout {
  margin-top: 2.5rem;
  padding: 1.5rem;
  border-left: 0.3rem solid var(--teal);
  background: var(--blue-pale);
}

.callout strong {
  display: block;
  margin-bottom: 0.25rem;
}

.document-header {
  padding: clamp(3.5rem, 8vw, 6rem) 0 2.5rem;
  background: linear-gradient(180deg, #eaf4f7 0%, var(--paper) 100%);
}

.document-header h1 {
  max-width: 18ch;
  color: var(--navy);
  font-size: clamp(2.5rem, 6vw, 4.2rem);
}

.document-meta {
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 650;
}

.document {
  display: grid;
  grid-template-columns: minmax(12rem, 0.32fr) minmax(0, 1fr);
  gap: clamp(2rem, 7vw, 5rem);
}

.document-aside {
  position: sticky;
  top: 1.5rem;
  align-self: start;
  padding: 1.2rem;
  border: 1px solid var(--line);
  border-radius: 0.8rem;
  background: var(--white);
}

.document-aside strong {
  display: block;
  margin-bottom: 0.65rem;
}

.document-aside a {
  display: block;
  margin-block: 0.45rem;
  font-size: 0.92rem;
}

.document-body {
  max-width: 48rem;
}

.document-body section {
  margin-bottom: 3rem;
  scroll-margin-top: 2rem;
}

.document-body h2 {
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--line);
  color: var(--navy);
  font-size: 1.65rem;
}

code {
  padding: 0.12rem 0.3rem;
  border-radius: 0.25rem;
  background: var(--blue-pale);
  color: var(--navy-soft);
  font-size: 0.93em;
}

.contact-panel {
  max-width: 48rem;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: var(--white);
  box-shadow: var(--shadow);
}

.button-link {
  display: inline-block;
  margin-top: 0.7rem;
  padding: 0.7rem 1rem;
  border-radius: 0.45rem;
  background: var(--teal-dark);
  color: var(--white);
  font-weight: 750;
  text-decoration: none;
}

.button-link:hover {
  background: var(--navy-soft);
  color: var(--white);
}

.site-footer {
  margin-top: 2rem;
  border-top: 1px solid var(--line);
  background: var(--white);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  padding-block: 2rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

@media (max-width: 760px) {
  .header-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.8rem;
    padding-block: 1rem;
  }

  .site-nav ul {
    flex-wrap: wrap;
    gap: 0.7rem 1rem;
  }

  .hero-grid,
  .split,
  .document {
    grid-template-columns: 1fr;
  }

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

  .document-aside {
    position: static;
  }

  .footer-inner {
    flex-direction: column;
    gap: 0.75rem;
  }
}

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