:root {
  --c-bg: #edf3f8;
  --c-surface: #ffffff;
  --c-ink: #13273c;
  --c-muted: #5d6f83;
  --c-accent: #1ca5b2;
  --c-accent-soft: #d8f3f6;
  --c-focus: #f1b858;
  --c-dark: #0e2238;
  --c-line: #c5d6e5;
  --r-sm: 6px;
  --r-md: 14px;
  --r-lg: 24px;
  --space-1: 0.5rem;
  --space-2: 0.9rem;
  --space-3: 1.25rem;
  --space-4: 1.8rem;
  --space-5: 2.6rem;
  --font-display: 'IBM Plex Mono', 'Consolas', 'Menlo', monospace;
  --font-body: 'Segoe UI', 'Inter', 'Helvetica Neue', Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--c-bg);
  color: var(--c-ink);
  line-height: 1.65;
}

img {
  max-width: 100%;
  display: block;
  height: auto;
}

a {
  color: #0f6f9f;
  text-decoration-thickness: 1.5px;
  text-underline-offset: 0.2em;
}

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

p,
li,
figcaption,
summary,
td,
th,
caption {
  max-width: 76ch;
}

h1,
h2,
h3 {
  margin: 0 0 var(--space-2);
  line-height: 1.2;
  color: #102238;
}

h1,
h2 {
  font-family: var(--font-display);
}

h1 {
  font-size: clamp(1.8rem, 2.7vw, 3rem);
}

h2 {
  font-size: clamp(1.2rem, 1.8vw, 1.8rem);
}

h3 {
  font-size: 1.04rem;
}

.container {
  width: min(1120px, 92vw);
  margin-inline: auto;
}

.page-main {
  padding: var(--space-4) 0 var(--space-5);
}

.skip-link {
  position: absolute;
  left: 0.8rem;
  top: -3rem;
  background: var(--c-focus);
  color: #1a1a1a;
  padding: 0.55rem 0.8rem;
  border-radius: var(--r-sm);
  z-index: 999;
  font-weight: 700;
}

.skip-link:focus {
  top: 0.7rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--c-dark);
  border-bottom: 3px solid var(--c-accent);
}

.top-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: 0.85rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.62rem;
  color: #e7f3ff;
  font-weight: 700;
  text-decoration: none;
}

.brand img {
  width: 1.45rem;
  height: 1.45rem;
}

.menu-toggle {
  display: none;
  border: 1px solid #4f6f8c;
  background: #16314f;
  color: #e7f3ff;
  border-radius: 10px;
  padding: 0.45rem 0.72rem;
  font: inherit;
}

.site-nav {
  display: flex;
  gap: 1.05rem;
  align-items: center;
}

.site-nav a {
  color: #dceaff;
  text-decoration: none;
  border-bottom: 2px solid transparent;
  padding-bottom: 0.15rem;
}

.site-nav a:hover,
.site-nav a[aria-current='page'] {
  border-color: var(--c-accent);
  color: #ffffff;
}

.hero {
  display: grid;
  gap: var(--space-4);
  align-items: center;
  margin-bottom: var(--space-4);
}

.hero-copy p {
  margin: 0 0 var(--space-3);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.button {
  display: inline-block;
  background: var(--c-accent);
  color: #022229;
  border: 0;
  border-radius: 10px;
  padding: 0.72rem 1rem;
  font-weight: 700;
  text-decoration: none;
}

.button:hover {
  filter: brightness(1.04);
}

.button-secondary {
  background: #dce8f7;
  color: #13304f;
}

.hero-points {
  margin: 0;
  padding-left: 1rem;
  color: var(--c-muted);
}

.hero-visual {
  margin: 0;
  background: linear-gradient(140deg, #102d47, #15385b);
  border-radius: 26px 8px 26px 8px;
  padding: var(--space-2);
  box-shadow: 0 16px 30px rgba(16, 33, 58, 0.18);
}

.jump-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-bottom: var(--space-4);
}

.jump-links a {
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: 100px;
  padding: 0.34rem 0.72rem;
  text-decoration: none;
  color: #234763;
}

section {
  margin-bottom: var(--space-5);
}

.notice {
  margin: var(--space-2) 0 var(--space-3);
  padding: 0.85rem 1rem;
  border-left: 4px solid var(--c-accent);
  background: var(--c-accent-soft);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
}

.intent-layout {
  display: grid;
  gap: var(--space-2);
}

.intent-layout article {
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: 14px 6px 14px 6px;
  padding: var(--space-3);
}

.map-grid {
  display: grid;
  gap: var(--space-2);
}

.map-grid a {
  text-decoration: none;
  color: inherit;
  border: 1px solid var(--c-line);
  background: var(--c-surface);
  padding: var(--space-3);
}

.map-grid a:nth-child(1) {
  border-radius: 22px 8px 16px 8px;
}

.map-grid a:nth-child(2) {
  border-radius: 8px 18px 8px 18px;
}

.map-grid a:nth-child(3) {
  border-radius: 16px 16px 6px 24px;
}

.map-grid a:nth-child(4) {
  border-radius: 8px 22px 8px 12px;
}

.map-grid h3 {
  margin-bottom: 0.4rem;
}

.table-wrap {
  overflow-x: auto;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
}

.data-table {
  border-collapse: collapse;
  min-width: 700px;
  width: 100%;
}

.data-table caption {
  text-align: left;
  font-weight: 600;
  color: #35516b;
  padding: 0.8rem 0.9rem;
}

.data-table th,
.data-table td {
  text-align: left;
  border-top: 1px solid #d5e0ea;
  padding: 0.7rem 0.9rem;
  vertical-align: top;
}

.data-table th {
  color: #173652;
  background: #f0f6fb;
}

.diagram figure {
  margin: 0;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  padding: var(--space-2);
}

figcaption {
  margin-top: 0.55rem;
  color: var(--c-muted);
}

.faq-list {
  display: grid;
  gap: 0.75rem;
}

details {
  border: 1px solid var(--c-line);
  background: var(--c-surface);
  border-radius: 12px;
  padding: 0.75rem 0.9rem;
}

summary {
  cursor: pointer;
  font-weight: 700;
  color: #183a57;
}

details p {
  margin: 0.6rem 0 0;
}

.breadcrumbs {
  display: inline-flex;
  gap: 0.55rem;
  margin-bottom: var(--space-2);
  color: var(--c-muted);
  font-size: 0.95rem;
}

.breadcrumbs span::before {
  content: '/';
  margin-right: 0.55rem;
}

.sub-hero {
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: 20px 10px 20px 10px;
  padding: var(--space-4);
}

.checklist {
  padding-left: 1.2rem;
}

.step-grid,
.status-grid {
  display: grid;
  gap: var(--space-2);
}

.step-grid article,
.status-grid article {
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  padding: var(--space-3);
}

.bullet-list {
  padding-left: 1.2rem;
}

.related-links ul,
.site-footer ul {
  margin: 0;
  padding-left: 1rem;
}

.site-footer {
  background: #0b1d31;
  color: #d6e4f4;
  padding-top: var(--space-4);
}

.site-footer h2 {
  color: #f3f8ff;
  font-size: 1.08rem;
  font-family: var(--font-body);
}

.site-footer a {
  color: #9ddff0;
}

.footer-grid {
  display: grid;
  gap: var(--space-3);
  padding-bottom: var(--space-3);
}

.foot-bottom {
  border-top: 1px solid #28415e;
  padding: 1rem 0 1.25rem;
  color: #b9cde3;
}

.entry-intro > * {
  opacity: 0;
  transform: translateY(12px);
}

body.is-loaded .entry-intro > * {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

body.is-loaded .entry-intro > *:nth-child(2) {
  transition-delay: 0.13s;
}

body.is-loaded .entry-intro > *:nth-child(3) {
  transition-delay: 0.21s;
}

:focus-visible {
  outline: 3px solid var(--c-focus);
  outline-offset: 2px;
}

@media (min-width: 900px) {
  .hero {
    grid-template-columns: 1.18fr 0.82fr;
  }

  .intent-layout {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .map-grid {
    grid-template-columns: 1.1fr 1fr;
  }

  .map-grid a:nth-child(1) {
    grid-column: span 2;
  }

  .step-grid,
  .status-grid,
  .footer-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .step-grid article:nth-child(1),
  .step-grid article:nth-child(2) {
    grid-column: span 1;
  }

  .step-grid article:nth-child(3),
  .step-grid article:nth-child(4) {
    grid-column: span 1;
  }
}

@media (max-width: 840px) {
  .menu-toggle {
    display: inline-block;
  }

  .site-nav {
    position: absolute;
    right: 4vw;
    top: 3.2rem;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    background: #113052;
    border: 1px solid #3d5f81;
    border-radius: 10px;
    padding: 0.8rem;
    min-width: 220px;
  }

  .site-nav[data-open='true'] {
    display: flex;
  }
}

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

  .entry-intro > *,
  body.is-loaded .entry-intro > * {
    opacity: 1;
    transform: none;
    transition: none;
  }
}