:root {
  --color-bg: #f7f9fc;
  --color-surface: #ffffff;
  --color-surface-soft: #f1f5f9;
  --color-primary: #002e4e;
  --color-primary-light: #004f73;
  --color-accent: #0f6f68;
  --color-accent-soft: #d9f3ef;
  --color-text: #0f172a;
  --color-text-muted: #475569;
  --color-text-subtle: #64748b;
  --color-border: #e2e8f0;
  --radius-sm: 6px;
  --radius-control: 8px;
  --radius-card: 14px;
  --radius-visual: 22px;
  --shadow-soft: 0 18px 50px rgba(15, 23, 42, 0.08);
  --shadow-card: 0 10px 30px rgba(15, 23, 42, 0.07);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

body {
  margin: 0;
  color: var(--color-text);
  background: var(--color-bg);
  font-family:
    "Inter",
    "Noto Sans JP",
    -apple-system,
    BlinkMacSystemFont,
    sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

img,
svg {
  max-width: 100%;
  height: auto;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  color: var(--color-primary-light);
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 4px;
}

.container {
  width: min(100% - 40px, 1160px);
  margin: 0 auto;
}

.skip-link {
  position: absolute;
  left: 12px;
  top: -48px;
  z-index: 100;
  border-radius: var(--radius-control);
  padding: 10px 16px;
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
  transition: top 0.18s ease;
}

.skip-link:focus {
  top: 12px;
  color: #fff;
}

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(226, 232, 240, 0.75);
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(18px);
}

.header-inner {
  display: flex;
  min-height: 72px;
  align-items: center;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--color-primary);
  font-weight: 800;
  white-space: nowrap;
}

.brand-mark {
  display: inline-flex;
  flex: none;
}

.brand-mark img {
  display: block;
}

.brand-name {
  font-size: 1.08rem;
  line-height: 1.2;
}

.brand-sub {
  border-left: 1px solid var(--color-border);
  padding-left: 12px;
  color: var(--color-text-subtle);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.desktop-nav {
  display: flex;
  margin-left: auto;
  gap: 26px;
}

.desktop-nav a {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--color-text-muted);
  font-size: 0.95rem;
  font-weight: 700;
}

.desktop-nav a:hover {
  color: var(--color-primary);
}

.nav-ext-icon {
  flex: none;
}

.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}

.mobile-menu {
  display: none;
  margin-left: auto;
  position: relative;
}

.mobile-menu summary {
  display: grid;
  width: 42px;
  height: 42px;
  place-content: center;
  gap: 5px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0;
  background: #fff;
  cursor: pointer;
  list-style: none;
}

.mobile-menu summary::-webkit-details-marker {
  display: none;
}

.mobile-menu summary span {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: var(--color-text);
}

.mobile-menu-panel {
  position: absolute;
  right: 0;
  top: 52px;
  display: grid;
  min-width: 230px;
  gap: 4px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-control);
  padding: 16px;
  background: #fff;
  box-shadow: var(--shadow-card);
}

.mobile-menu-panel a {
  display: flex;
  align-items: center;
  gap: 6px;
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  color: var(--color-text);
  font-weight: 700;
}

.mobile-menu-panel a:hover {
  background: var(--color-surface-soft);
  color: var(--color-primary);
}

.mobile-menu-panel .mobile-menu-cta {
  justify-content: center;
  margin-top: 8px;
  background: var(--color-primary);
  color: #fff;
  text-align: center;
}

.mobile-menu-panel .mobile-menu-cta:hover {
  background: var(--color-primary-light);
  color: #fff;
}

/* ---------- Buttons ---------- */

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  border: 0;
  border-radius: var(--radius-control);
  padding: 0 22px;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
  transition:
    transform 0.18s ease,
    background 0.18s ease,
    box-shadow 0.18s ease,
    border-color 0.18s ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 12px 26px rgba(30, 58, 138, 0.22);
}

.button-primary:hover {
  background: var(--color-primary-light);
  color: #fff;
}

.button-secondary {
  border: 1px solid var(--color-border);
  background: #fff;
  color: var(--color-primary);
}

.button-secondary:hover {
  border-color: var(--color-primary-light);
  color: var(--color-primary-light);
}

/* ---------- Sections ---------- */

.section {
  padding: 88px 0;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--color-accent);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.35;
  font-weight: 800;
}

h1 {
  margin: 0 0 22px;
  font-size: clamp(2rem, 4.6vw, 3.1rem);
  letter-spacing: 0.01em;
}

h2 {
  margin: 0 0 14px;
  font-size: clamp(1.5rem, 2.8vw, 2.1rem);
}

h3 {
  margin: 0 0 10px;
  font-size: 1.08rem;
}

.section-lead {
  margin: 0 0 40px;
  color: var(--color-text-muted);
  font-size: 1.02rem;
}

/* ---------- Hero ---------- */

.hero {
  overflow: hidden;
  padding: 84px 0 64px;
  background:
    linear-gradient(180deg, rgba(229, 238, 245, 0.78), rgba(247, 249, 252, 0)),
    var(--color-bg);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, auto) minmax(0, 360px);
  gap: 48px;
  align-items: center;
  justify-content: center;
}

.hero-accent {
  color: var(--color-accent);
}

.channel-entries {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.channel-entry {
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding: 30px 22px 24px;
  color: var(--color-text);
}

.channel-entry + .channel-entry {
  border-left: 1px solid var(--color-border);
}

.channel-entry:first-child {
  border-left: 1px solid var(--color-border);
}

.channel-entry:last-child {
  border-right: 1px solid var(--color-border);
}

.channel-entry-top {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

.channel-entry-logo {
  flex: none;
  width: 50px;
  height: 50px;
}

.channel-entry-body {
  display: flex;
  flex: none;
  min-width: 0;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
}

.channel-entry-label {
  color: var(--color-text-subtle);
  font-size: 0.82rem;
  font-weight: 700;
  line-height: 18px;
}

.channel-entry-title {
  color: var(--color-primary);
  font-size: 1.25rem;
  font-weight: 800;
  line-height: 28px;
}

.channel-entry-links {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.channel-entry-link-item {
  display: grid;
  gap: 6px;
}

.channel-entry-link-desc {
  color: var(--color-text-subtle);
  font-size: 0.72rem;
  font-weight: 500;
  line-height: 1.4;
  text-align: center;
}

.channel-entry-link {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 4px;
  min-height: 38px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-control);
  padding: 0 10px;
  background: #fff;
  color: var(--color-primary);
  font-size: 0.8rem;
  font-weight: 700;
  transition:
    border-color 0.18s ease,
    color 0.18s ease;
}

.channel-entry-link-text {
  grid-column: 2;
  min-width: 0;
}

.channel-entry-link:not(.is-disabled)::after {
  grid-column: 3;
  justify-self: end;
  content: "↗";
  color: var(--color-accent);
  font-size: 0.85em;
  transition: transform 0.18s ease;
}

.channel-entry-link:not(.is-disabled):hover::after {
  transform: translate(2px, -2px);
}

.channel-entry-link:hover {
  border-color: var(--color-primary-light);
  color: var(--color-primary-light);
}

.channel-entry-link.is-disabled {
  border-color: var(--color-border);
  background: var(--color-surface-soft);
  color: var(--color-text-subtle);
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

.hero-visual {
  min-width: 0;
}

.hero-diagram-card {
  max-width: 360px;
  margin: 0 auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-visual);
  padding: 0;
  background: var(--color-surface);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

.hero-top-image {
  display: block;
  width: 100%;
  height: auto;
}

/* ---------- Channels ---------- */

.channels {
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

/* ---------- Statutes ---------- */

.statutes-group + .statutes-group {
  margin-top: 44px;
}

.statutes-title {
  margin: 0 0 14px;
  font-size: 1.15rem;
}

.statutes-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: var(--color-surface);
  box-shadow: var(--shadow-card);
}

.statutes-table-wrap--scroll {
  max-height: 500px;
  overflow-y: auto;
}

.statutes-table {
  width: 100%;
  min-width: 560px;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 0.95rem;
}

.statutes-table th,
.statutes-table td {
  border-bottom: 1px solid var(--color-border);
  padding: 12px 16px;
}

.statutes-table thead th {
  position: sticky;
  top: 0;
  z-index: 1;
  background: var(--color-surface-soft);
  color: var(--color-primary);
  font-size: 0.85rem;
  font-weight: 800;
  text-align: center;
  white-space: nowrap;
}

.statutes-table thead th:first-child,
.statutes-table tbody th {
  text-align: left;
}

.statutes-table tbody th {
  font-weight: 700;
}

.statutes-table tbody td {
  text-align: center;
  font-weight: 700;
}

.statutes-table .mark-yes {
  color: var(--color-accent);
}

.statutes-table .mark-no {
  color: var(--color-text-subtle);
}

.statutes-table tbody tr:last-child th,
.statutes-table tbody tr:last-child td {
  border-bottom: 0;
}

/* ---------- Foundation ---------- */

.foundation {
  background: var(--color-primary);
  color: #e6eef5;
}

.foundation .eyebrow {
  color: #7ee0d4;
}

.foundation h2 {
  color: #ffffff;
}

.foundation-grid {
  display: grid;
  grid-template-columns: minmax(0, 11fr) minmax(0, 9fr);
  gap: 56px;
  align-items: center;
}

.foundation-intro {
  margin: 0 0 26px;
  color: #c4d3e0;
  font-size: 1rem;
}

.foundation-features {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.foundation-features h3 {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0 0 2px;
  color: #ffffff;
  font-size: 1rem;
}

.foundation-features h3::before {
  content: "";
  flex: none;
  align-self: center;
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: #7ee0d4;
}

.foundation-features p {
  margin: 0 0 0 16px;
  color: #9fb4c4;
  font-size: 0.9rem;
}

.foundation-diagram {
  display: flex;
  justify-content: center;
}

.foundation-image {
  display: block;
  width: 100%;
  max-width: 500px;
  height: auto;
}

/* ---------- News ---------- */

.portal-news-list {
  display: grid;
  gap: 0;
  margin: 0 0 22px;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: var(--color-surface);
  overflow: hidden;
  list-style: none;
}

.portal-news-item {
  display: flex;
  align-items: baseline;
  gap: 18px;
  padding: 18px 22px;
  color: var(--color-text);
  transition: background 0.18s ease;
}

.portal-news-item + .portal-news-item {
  border-top: 1px solid var(--color-border);
}

.portal-news-item:hover {
  background: var(--color-surface-soft);
  color: var(--color-primary);
}

.portal-news-item time {
  flex: none;
  color: var(--color-text-subtle);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.portal-news-item span {
  font-weight: 700;
}

.news-all-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 800;
}

.news-all-link::after {
  content: "→";
  transition: transform 0.18s ease;
}

.news-all-link:hover::after {
  transform: translateX(3px);
}

/* ---------- Business CTA ---------- */

.cta-section {
  padding-top: 48px;
  padding-bottom: 0;
}

.cta-box {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-visual);
  padding: 56px 40px;
  background: var(--color-surface);
  text-align: center;
}

.cta-box .eyebrow {
  margin-bottom: 14px;
}

.cta-box h2 {
  margin-bottom: 16px;
}

.cta-box > p:not(.eyebrow) {
  max-width: 680px;
  margin: 0 auto 30px;
  color: var(--color-text-muted);
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
}

.cta-link {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 6px;
  min-height: 50px;
  min-width: 220px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-control);
  padding: 0 18px;
  background: #fff;
  color: var(--color-primary);
  font-weight: 800;
  transition:
    border-color 0.18s ease,
    color 0.18s ease;
}

.cta-link-text {
  grid-column: 2;
}

.cta-link::after {
  grid-column: 3;
  justify-self: end;
  content: "↗";
  color: var(--color-accent);
  font-size: 0.85em;
  transition: transform 0.18s ease;
}

.cta-link:hover {
  border-color: var(--color-primary-light);
  color: var(--color-primary-light);
}

.cta-link:hover::after {
  transform: translate(2px, -2px);
}

.cta-extra {
  border-top: 1px solid var(--color-border);
  margin-top: 40px;
  padding-top: 36px;
}

.cta-extra h3 {
  margin: 0 0 10px;
  font-size: clamp(1.5rem, 2.8vw, 2.1rem);
}

.cta-extra p {
  max-width: 680px;
  margin: 0 auto 24px;
  color: var(--color-text-muted);
}

.cta-extra .cta-link {
  width: fit-content;
  margin: 0 auto;
}

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 56px 0 40px;
  background: var(--color-surface);
}

.footer-inner {
  display: grid;
  gap: 40px;
}

.footer-top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 40px;
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(150px, 1fr));
  gap: 40px;
}

.footer-col h3 {
  margin: 0 0 12px;
  color: var(--color-text-subtle);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.footer-col ul {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-col a {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--color-text-muted);
  font-size: 0.94rem;
  font-weight: 700;
}

.footer-col a:hover {
  color: var(--color-primary);
}

.copyright {
  margin: 0;
  color: var(--color-text-subtle);
  font-size: 0.84rem;
}

/* ---------- Responsive ---------- */

@media (max-width: 980px) {
  .desktop-nav,
  .header-cta {
    display: none;
  }

  .mobile-menu {
    display: block;
  }

  .hero {
    padding: 56px 0 48px;
  }

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

  .hero-grid {
    gap: 24px;
  }

  .hero-diagram-card {
    max-width: 300px;
  }

  .cta-box {
    padding: 44px 24px;
  }

  .foundation-diagram {
    max-width: 460px;
    justify-self: center;
    width: 100%;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(100% - 32px, 1160px);
  }

  .section {
    padding: 64px 0;
  }

  .cta-section {
    padding: 32px 0 0;
  }

  .hero {
    padding: 44px 0 40px;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 13fr) minmax(0, 7fr);
    gap: 14px;
  }

  .hero-copy h1 {
    font-size: clamp(1.1rem, 5vw, 2rem);
  }

  .hero-diagram-card {
    max-width: 100%;
  }

  .channel-entries {
    grid-template-columns: 1fr;
  }

  .channel-entry + .channel-entry {
    border-left: 0;
    border-top: 1px solid var(--color-border);
  }

  .channel-entry:first-child {
    border-left: 0;
  }

  .channel-entry:last-child {
    border-right: 0;
  }

  .channel-entry-links {
    grid-template-columns: repeat(2, 1fr);
  }

  .cta-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .button {
    width: 100%;
  }

  .portal-news-item {
    flex-direction: column;
    gap: 4px;
    padding: 14px 18px;
  }

  .footer-cols {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}

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

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  .skip-link {
    transition: none;
  }
}