:root {
  --ink: #17282d;
  --muted: #5a6b6e;
  --brand: #116b5d;
  --brand-dark: #0b4d44;
  --accent: #d08b2d;
  --pale: #edf5f2;
  --soft: #f6f8f7;
  --line: #bed0cc;
  --warn: #fff4dc;
  --paper: #ffffff;
  --page: #eef2f0;
  --header-height: 72px;
  color-scheme: light;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-height) + 24px); }
body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font-family: "Yu Gothic", "YuGothic", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  font-size: 18px;
  line-height: 1.75;
}
body.nav-open { overflow: hidden; }
a { color: inherit; }
button, input, select { font: inherit; }
button, a, input, select { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid #e59d37; outline-offset: 3px; }

.skip-link {
  position: fixed;
  z-index: 100;
  top: 8px;
  left: 8px;
  padding: 10px 14px;
  background: var(--ink);
  color: #fff;
  transform: translateY(-150%);
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: sticky;
  z-index: 40;
  top: 0;
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 10px clamp(20px, 4vw, 56px);
  background: rgba(255, 255, 255, .96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}
.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  font-weight: 800;
  text-decoration: none;
  letter-spacing: -.02em;
}
.brand-mark {
  flex: 0 0 auto;
  padding: 5px 9px;
  background: var(--brand);
  color: #fff;
  font-size: .72rem;
  letter-spacing: .08em;
}
.header-actions { display: flex; align-items: stretch; gap: 10px; }
.download-button {
  display: grid;
  min-width: 224px;
  padding: 8px 16px;
  background: var(--brand);
  color: #fff;
  text-align: center;
  text-decoration: none;
  font-weight: 800;
  line-height: 1.25;
}
.download-button:hover { background: var(--brand-dark); }
.download-button small { font-size: .68rem; font-weight: 600; opacity: .84; }
.menu-button, .nav-close {
  display: none;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  font-weight: 800;
  cursor: pointer;
}

.site-shell {
  display: grid;
  grid-template-columns: 268px minmax(0, 1fr);
  max-width: 1600px;
  margin: 0 auto;
}
.site-navigation {
  position: sticky;
  top: var(--header-height);
  height: calc(100vh - var(--header-height));
  overflow-y: auto;
  padding: 28px 24px 48px;
  background: #f8faf9;
  border-right: 1px solid var(--line);
}
.navigation-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 22px;
  font-size: 1.15rem;
}
.nav-group { margin: 0 0 24px; }
.nav-group h2 {
  margin: 0 0 7px;
  color: var(--brand);
  font-size: .82rem;
  letter-spacing: .12em;
}
.nav-group a {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  min-height: 44px;
  padding: 7px 0;
  border-bottom: 1px solid #dce7e4;
  font-size: .92rem;
  line-height: 1.35;
  text-decoration: none;
}
.nav-group a:hover { color: var(--brand); }
.nav-group small { color: var(--muted); font-variant-numeric: tabular-nums; }

main { min-width: 0; background: var(--paper); }
.hero {
  min-height: 300px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, .7fr);
  align-items: end;
  gap: 48px;
  padding: clamp(38px, 4vw, 56px) clamp(28px, 7vw, 104px);
  background:
    linear-gradient(105deg, rgba(8, 72, 63, .98) 0 58%, rgba(17, 107, 93, .86) 58%),
    radial-gradient(circle at 80% 20%, rgba(255, 255, 255, .22), transparent 45%);
  color: #fff;
}
.eyebrow {
  margin: 0 0 12px;
  color: var(--brand);
  font-size: .82rem;
  font-weight: 900;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.hero .eyebrow { color: #c3e0d9; }
.hero h1 {
  margin: 0;
  max-width: 680px;
  font-size: clamp(2.6rem, 4vw, 3.6rem);
  line-height: 1.05;
  letter-spacing: -.06em;
}
.hero-lead {
  max-width: 660px;
  margin: 16px 0 0;
  color: #e6f2ef;
  font-size: clamp(1rem, 1.8vw, 1.24rem);
}
.hero-facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  align-self: end;
  border-top: 1px solid rgba(255, 255, 255, .45);
}
.hero-facts div { padding: 18px 12px 0 0; }
.hero-facts strong {
  display: block;
  font-size: clamp(1.7rem, 3vw, 2.7rem);
  line-height: 1;
}
.hero-facts span { display: block; margin-top: 8px; color: #dcece8; font-size: .82rem; }

.notice {
  display: grid;
  grid-template-columns: minmax(240px, .45fr) 1fr;
  gap: 34px;
  padding: 24px clamp(28px, 7vw, 104px);
  background: var(--warn);
  border-bottom: 1px solid #efd7a9;
}
.notice strong { color: #754606; }
.notice p { margin: 0; font-size: 1rem; }

.search-panel, .guide-sections {
  width: min(1120px, calc(100% - 56px));
  margin-inline: auto;
}
.search-heading h2 {
  margin: 0;
  font-size: clamp(1.55rem, 3vw, 2.3rem);
  line-height: 1.25;
  letter-spacing: -.035em;
}

.search-panel {
  position: relative;
  z-index: 2;
  margin-top: 44px;
  padding: 28px 32px;
  background: var(--ink);
  color: #fff;
}
.search-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
}
.search-heading .eyebrow { color: #9fcac1; }
.result-count { margin: 0; color: #d9e8e5; white-space: nowrap; }
.result-count strong { color: #fff; font-size: 1.6rem; }
.search-controls {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(170px, .6fr) auto;
  align-items: end;
  gap: 12px;
  margin-top: 24px;
}
.search-field, .region-field { display: grid; gap: 7px; }
.search-field span, .region-field span { font-size: .86rem; font-weight: 800; }
.search-field input, .region-field select {
  width: 100%;
  min-height: 50px;
  border: 0;
  border-radius: 0;
  padding: 10px 14px;
  background: #fff;
  color: var(--ink);
}
.clear-button {
  min-height: 50px;
  padding: 10px 18px;
  border: 1px solid #819591;
  background: transparent;
  color: #fff;
  cursor: pointer;
}
.clear-button:hover { background: rgba(255, 255, 255, .1); }
.no-results {
  width: min(1120px, calc(100% - 56px));
  margin: 30px auto;
  padding: 36px;
  background: var(--soft);
  text-align: center;
}
.no-results p { margin-bottom: 0; color: var(--muted); }

.guide-sections {
  display: grid;
  gap: 32px;
  padding: 34px 0 100px;
}
.content-section {
  position: relative;
  padding: 0 40px;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  border-top: 7px solid var(--brand);
  scroll-margin-top: calc(var(--header-height) + 20px);
}
.content-section[hidden] { display: none; }
.content-section::before {
  content: attr(data-region) "　" attr(data-page);
  display: block;
  margin: 0 -40px 34px;
  padding: 13px 40px;
  background: var(--pale);
  border-bottom: 1px solid var(--line);
  color: var(--brand-dark);
  font-size: .82rem;
  font-weight: 900;
  letter-spacing: .12em;
}
.section-end {
  margin: 44px -40px 0;
  padding: 15px 40px;
  background: var(--pale);
  border-top: 1px solid var(--line);
  color: var(--brand-dark);
  font-size: .86rem;
  font-weight: 800;
  text-align: right;
}
.page-header {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: start;
  margin-bottom: 30px;
}
.page-header .kicker { color: var(--brand); font-size: .82rem; font-weight: 900; letter-spacing: .08em; }
.page-header h1 {
  margin: 5px 0 4px;
  font-size: clamp(1.8rem, 4vw, 3rem);
  line-height: 1.15;
  letter-spacing: -.04em;
}
.page-header p { margin: 0; color: var(--muted); }
.schemes { display: grid; grid-template-columns: 1fr; gap: 42px; }
.scheme, .focus-layout { min-width: 0; padding-left: 24px; border-left: 5px solid var(--brand); }
.scheme-head, .focus-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: start;
  gap: 24px;
  margin-bottom: 20px;
}
.scheme-title, .focus-head h2 {
  margin: 0;
  color: var(--brand-dark);
  font-size: clamp(1.3rem, 2.4vw, 1.85rem);
  line-height: 1.25;
}
.scheme-badge, .focus-badge {
  display: inline-block;
  margin-top: 10px;
  padding: 5px 10px;
  background: var(--warn);
  color: #754606;
  font-size: .9rem;
  font-weight: 900;
}
.official-link {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 9px 14px;
  background: var(--brand);
  color: #fff;
  font-size: .92rem;
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
}
.official-link::after { content: " ↗"; margin-left: 6px; }
.official-link:hover { background: var(--brand-dark); }
.scheme-sections {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 26px 34px;
}
.fact-section { padding-top: 18px; border-top: 1px solid var(--line); }
.fact-section h3, .subhead { margin: 0 0 10px; color: var(--brand-dark); font-size: 1.08rem; }
.fact-section ul, .route-box ul, .info-panel ul { margin: 0; padding-left: 1.35em; }
.fact-section li, .route-box li, .info-panel li { margin: 7px 0; }
.alert, .timing-note {
  margin-top: 20px;
  padding: 16px 18px;
  background: var(--warn);
  border-left: 4px solid var(--accent);
  font-size: .98rem;
}
.source-note {
  margin-top: 24px;
  color: var(--muted);
  font-size: .8rem;
  overflow-wrap: anywhere;
}

.table-scroll { max-width: 100%; overflow-x: auto; }
.table-scroll:focus-visible { outline-offset: 2px; }
.program-table, .comparison-wrap table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
  font-size: .94rem;
}
.program-table th, .program-table td, .comparison-wrap th, .comparison-wrap td {
  padding: 13px 14px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}
.program-table th, .comparison-wrap th { background: var(--pale); color: var(--brand-dark); }
.route-panel, .katsushika-grid, .application-tracks {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 24px;
}
.route-box, .info-panel, .application-tracks > div {
  padding: 22px 24px;
  background: var(--soft);
  border-top: 4px solid var(--brand);
}
.route-box h3, .info-panel h3 { margin: 0 0 10px; color: var(--brand-dark); }
.route-box p, .info-panel p { margin: 8px 0; }
.amount-row, .combo-strip, .case-result, .decision-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: 18px 0;
  background: var(--line);
  border: 1px solid var(--line);
}
.amount-row > div, .combo-strip > div, .case-result > div, .decision-strip > div {
  padding: 18px;
  background: #fff;
}
.amount-row strong, .combo-strip strong, .case-result strong, .decision-strip strong {
  display: block;
  margin-bottom: 5px;
  color: var(--brand-dark);
}
.comparison-wrap { margin-top: 20px; }
.comparison-wrap h2 { color: var(--brand-dark); }
.comparison-note {
  margin-top: 22px;
  padding: 20px 22px;
  background: var(--soft);
  border-left: 5px solid var(--brand);
}
.mobile-download { display: none; }
.nav-scrim { display: none; }
.nav-scrim[hidden] { display: none !important; }

@media (max-width: 1100px) {
  .site-shell { grid-template-columns: 230px minmax(0, 1fr); }
  .site-navigation { padding-inline: 18px; }
  .hero { grid-template-columns: 1fr; gap: 24px; min-height: auto; }
  .hero-facts { max-width: 600px; }
}

@media (max-width: 820px) {
  :root { --header-height: 64px; }
  .site-header { padding: 8px 16px; }
  .brand-mark, .download-button { display: none; }
  .brand { font-size: .86rem; line-height: 1.25; }
  .menu-button { display: inline-flex; min-width: 64px; min-height: 44px; align-items: center; justify-content: center; }
  .site-shell { display: block; }
  .site-navigation {
    position: fixed;
    z-index: 60;
    top: 0;
    left: 0;
    width: min(88vw, 360px);
    height: 100dvh;
    padding: 24px;
    transform: translateX(-105%);
    transition: transform .22s ease;
    box-shadow: 12px 0 32px rgba(0, 0, 0, .18);
  }
  body.nav-open .site-navigation { transform: translateX(0); }
  .nav-close { display: inline-grid; width: 44px; height: 44px; place-items: center; font-size: 1.5rem; }
  .nav-scrim {
    position: fixed;
    z-index: 50;
    inset: 0;
    display: block;
    background: rgba(8, 28, 25, .52);
  }
  .hero { padding: 64px 28px 50px; }
  .notice { grid-template-columns: 1fr; gap: 8px; padding: 20px 28px; }
  .search-panel, .guide-sections, .no-results { width: min(100% - 36px, 720px); }
  .search-heading { align-items: start; }
  .search-controls { grid-template-columns: 1fr 1fr; }
  .search-field { grid-column: 1 / -1; }
  .scheme-sections { grid-template-columns: 1fr; }
  .amount-row, .combo-strip, .case-result, .decision-strip { grid-template-columns: repeat(2, 1fr); }
  .guide-sections { padding-bottom: 112px; }
  .mobile-download {
    position: fixed;
    z-index: 35;
    right: 14px;
    bottom: 14px;
    left: 14px;
    display: block;
  }
  .mobile-download a {
    display: flex;
    min-height: 54px;
    align-items: center;
    justify-content: center;
    gap: 9px;
    padding: 10px 16px;
    background: var(--brand);
    color: #fff;
    box-shadow: 0 8px 22px rgba(10, 70, 61, .3);
    font-weight: 900;
    text-decoration: none;
  }
  .mobile-download small { font-size: .68rem; font-weight: 600; opacity: .82; }
}

@media (max-width: 560px) {
  .hero h1 { font-size: clamp(2.5rem, 13vw, 4rem); }
  .hero { padding-top: 42px; padding-bottom: 38px; }
  .hero-facts { display: none; }
  .search-panel { padding: 24px 20px; }
  .search-heading { display: grid; }
  .result-count { justify-self: start; }
  .search-controls { grid-template-columns: 1fr; }
  .search-field { grid-column: auto; }
  .content-section { padding-inline: 18px; }
  .content-section::before {
    margin-inline: -18px;
    padding-inline: 18px;
  }
  .section-end {
    margin-inline: -18px;
    padding-inline: 18px;
  }
  .scheme, .focus-layout { padding-left: 16px; border-left-width: 4px; }
  .scheme-head, .focus-head { grid-template-columns: 1fr; gap: 14px; }
  .official-link { justify-self: start; }
  .route-panel, .katsushika-grid, .application-tracks { grid-template-columns: 1fr; }
  .amount-row, .combo-strip, .case-result, .decision-strip { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .site-navigation { transition: none; }
}

@media print {
  .site-header, .site-navigation, .hero, .notice, .search-panel,
  .mobile-download, .nav-scrim { display: none !important; }
  .site-shell { display: block; }
  .guide-sections { width: 100%; padding: 0; }
  .content-section { break-inside: avoid; }
}