:root {
  --ink: #18334a;
  --ink-soft: #3d5569;
  --paper: #f4f0e7;
  --white: #fffdf8;
  --line: #c8c1b2;
  --blue: #1e5a78;
  --blue-pale: #d9e8ed;
  --red: #b84935;
  --red-pale: #f0d8d0;
  --ochre: #c59a3d;
  --shadow: 0 12px 32px rgb(24 51 74 / 9%);
  color: var(--ink);
  background: var(--paper);
  font-family: "Yu Gothic UI", "Hiragino Kaku Gothic ProN", sans-serif;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  background: var(--paper);
}
button,
input {
  font: inherit;
}
button,
a {
  -webkit-tap-highlight-color: transparent;
}
button {
  color: inherit;
}
a {
  color: var(--blue);
  text-underline-offset: 3px;
}
button:focus-visible,
a:focus-visible,
input:focus-visible {
  outline: 3px solid var(--ochre);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  z-index: 20;
  top: 8px;
  left: 8px;
  padding: 8px 12px;
  color: white;
  background: var(--ink);
  transform: translateY(-150%);
}
.skip-link:focus {
  transform: none;
}

.site-header,
.site-footer,
.home,
.content-page {
  width: min(1180px, calc(100% - 40px));
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 74px;
  border-bottom: 1px solid var(--line);
}
.wordmark {
  display: flex;
  align-items: center;
  gap: 11px;
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
}
.code-mark {
  display: grid;
  grid-template-columns: 20px 28px 14px;
  gap: 2px;
  font-family: ui-monospace, "Cascadia Mono", monospace;
}
.code-mark i {
  display: grid;
  place-items: center;
  height: 25px;
  border: 1px solid var(--ink);
  font-size: 0.64rem;
  font-style: normal;
}
.code-mark i:last-child {
  color: var(--white);
  background: var(--red);
  border-color: var(--red);
}
.site-header nav,
.site-footer span:last-child {
  display: flex;
  gap: 18px;
}
.site-header nav a {
  color: var(--ink-soft);
  font-size: 0.8rem;
  font-weight: 700;
  text-decoration: none;
}
.site-header nav a:hover {
  color: var(--red);
}

.intro {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(420px, 1.1fr);
  align-items: center;
  gap: 60px;
  min-height: 470px;
  padding: 55px 0 48px;
}
.eyebrow,
.section-heading p,
.result-heading p,
.code-tray header p,
.content-heading p {
  margin: 0 0 7px;
  color: var(--red);
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 0.14em;
}
.product-heading h1 {
  max-width: 520px;
  margin: 0;
  font-family: "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: clamp(2rem, 4.2vw, 3.25rem);
  line-height: 1.24;
  letter-spacing: 0.02em;
}
.product-heading > p:not(.eyebrow) {
  max-width: 540px;
  margin: 20px 0 0;
  color: var(--ink-soft);
  line-height: 1.9;
}
.directory-facts {
  display: flex;
  margin-top: 34px;
}
.directory-facts span {
  min-width: 112px;
  padding-right: 24px;
}
.directory-facts span + span {
  padding-left: 24px;
  border-left: 1px solid var(--line);
}
.directory-facts strong,
.directory-facts small {
  display: block;
}
.directory-facts strong {
  font-family: ui-monospace, "Cascadia Mono", monospace;
  font-size: 1.38rem;
}
.directory-facts small {
  margin-top: 3px;
  color: var(--ink-soft);
  font-size: 0.68rem;
}

.code-landscape {
  position: relative;
  min-height: 340px;
  padding: 28px;
  background: #e5ecec;
  border: 1px solid #b5c5c8;
  box-shadow: var(--shadow);
  overflow: hidden;
}
.code-landscape::before,
.code-landscape::after {
  content: "";
  position: absolute;
  border: 1px solid rgb(30 90 120 / 20%);
}
.code-landscape::before {
  inset: 14px;
}
.code-landscape::after {
  right: -30px;
  bottom: 78px;
  width: 280px;
  height: 1px;
  border-width: 1px 0 0;
  transform: rotate(-8deg);
}
.map-blocks {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  grid-template-rows: repeat(5, 35px);
  gap: 5px;
  width: 92%;
  margin: 0 auto 30px;
  transform: rotate(-2deg);
}
.map-blocks span {
  display: grid;
  place-items: center;
  color: var(--ink);
  background: var(--white);
  border: 1px solid #9fb6bd;
  font-family: ui-monospace, "Cascadia Mono", monospace;
  font-size: 0.62rem;
  font-weight: 800;
  box-shadow: 3px 3px 0 rgb(30 90 120 / 10%);
}
.map-hokkaido {
  grid-column: 8 / 11;
  grid-row: 1;
}
.map-tohoku {
  grid-column: 7 / 9;
  grid-row: 2;
}
.map-kanto {
  grid-column: 7 / 10;
  grid-row: 3;
}
.map-chubu {
  grid-column: 5 / 7;
  grid-row: 3;
}
.map-kinki {
  grid-column: 4 / 6;
  grid-row: 4;
}
.map-chugoku {
  grid-column: 2 / 4;
  grid-row: 4;
}
.map-shikoku {
  grid-column: 3 / 5;
  grid-row: 5;
}
.map-kyushu {
  grid-column: 1 / 3;
  grid-row: 5;
}
.code-plate,
.code-anatomy {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1.35fr 9px 0.55fr;
  gap: 4px;
  width: min(390px, 100%);
  margin-left: auto;
  padding: 7px;
  background: var(--ink);
  box-shadow: 8px 8px 0 rgb(24 51 74 / 14%);
}
.code-plate span,
.code-anatomy span {
  display: grid;
  align-content: center;
  min-height: 72px;
  padding: 6px 10px;
  color: var(--ink);
  background: var(--white);
}
.code-plate small,
.code-anatomy small {
  color: var(--ink-soft);
  font-size: 0.55rem;
  font-weight: 800;
}
.code-plate b,
.code-anatomy b {
  font-family: ui-monospace, "Cascadia Mono", monospace;
  font-size: 2rem;
  letter-spacing: 0.12em;
}
.code-plate > i,
.code-anatomy > i {
  display: block;
  background: var(--paper);
}
.code-plate .check-digit {
  color: var(--white);
  background: var(--red);
}
.code-plate .check-digit small {
  color: var(--red-pale);
}

.version-ribbon {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 22px;
  margin-bottom: 24px;
  padding: 11px 15px;
  color: var(--white);
  background: var(--ink);
  font-size: 0.74rem;
}
.version-ribbon strong {
  color: #f1d684;
}
.version-ribbon span {
  opacity: 0.8;
}
.version-ribbon a {
  color: var(--white);
  font-weight: 800;
}

.search-desk,
.prefecture-board,
.municipality-results,
.code-tray {
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: 0 7px 20px rgb(24 51 74 / 5%);
}
.search-desk,
.prefecture-board {
  margin-top: 18px;
  padding: 26px 28px;
}
.section-heading,
.result-heading,
.code-tray > header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
}
.section-heading h2,
.result-heading h2,
.code-tray h2 {
  margin: 0;
  font-family: "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: 1.35rem;
}
.section-heading output,
.result-heading output,
.code-tray output {
  color: var(--ink-soft);
  font-size: 0.75rem;
  font-weight: 800;
}
.section-heading > button {
  padding: 7px 10px;
  background: transparent;
  border: 1px solid var(--line);
  font-size: 0.75rem;
  cursor: pointer;
}

.municipality-search {
  display: grid;
  gap: 7px;
  margin-top: 22px;
  color: var(--ink-soft);
  font-size: 0.72rem;
  font-weight: 800;
}
.search-box {
  display: grid;
  grid-template-columns: 32px 1fr auto;
  align-items: center;
  border: 2px solid var(--ink);
  background: var(--white);
}
.search-box i {
  text-align: center;
  font-family: serif;
  font-size: 1.5rem;
  font-style: normal;
}
.search-box input {
  min-width: 0;
  padding: 13px 8px;
  color: var(--ink);
  background: transparent;
  border: 0;
  outline: none;
}
.search-box input::placeholder {
  color: #7c8b94;
}
.search-box button {
  align-self: stretch;
  padding: 0 15px;
  background: var(--paper);
  border: 0;
  border-left: 1px solid var(--line);
  cursor: pointer;
}
.type-filter {
  margin: 18px 0 0;
  padding: 0;
  border: 0;
}
.type-filter legend {
  margin-bottom: 7px;
  color: var(--ink-soft);
  font-size: 0.7rem;
  font-weight: 800;
}
.type-filter div {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.type-filter button,
.region-row button {
  padding: 7px 12px;
  background: transparent;
  border: 1px solid var(--line);
  font-size: 0.76rem;
  cursor: pointer;
}
.type-filter button[aria-pressed="true"] {
  color: var(--white);
  background: var(--blue);
  border-color: var(--blue);
}
.privacy-note {
  margin: 13px 0 0;
  color: var(--ink-soft);
  font-size: 0.67rem;
}

.region-grid {
  display: grid;
  gap: 1px;
  margin-top: 20px;
  background: var(--line);
  border: 1px solid var(--line);
}
.region-row {
  display: grid;
  grid-template-columns: 100px 1fr;
  align-items: stretch;
  background: var(--white);
}
.region-row h3 {
  display: grid;
  align-items: center;
  margin: 0;
  padding: 8px 12px;
  color: var(--ink-soft);
  background: #e9e4d9;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
}
.region-row div {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  padding: 7px;
}
.region-row button {
  min-width: 44px;
  padding: 6px 9px;
  background: var(--white);
  border-color: transparent;
}
.region-row button:hover {
  border-color: var(--blue);
}
.region-row button[aria-pressed="true"] {
  color: var(--white);
  background: var(--red);
  border-color: var(--red);
}

.result-and-tray {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 315px;
  align-items: start;
  gap: 18px;
  margin: 18px 0 56px;
}
.municipality-results,
.code-tray {
  padding: 25px 28px;
}
#search-status {
  margin: 16px 0 10px;
  color: var(--ink-soft);
  font-size: 0.72rem;
}
.municipality-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
.municipality-card {
  position: relative;
  min-width: 0;
  padding: 16px;
  background: #fbfaf6;
  border: 1px solid var(--line);
  border-top: 3px solid var(--blue);
}
.municipality-card h3 {
  margin: 14px 0 2px;
  font-family: "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: 1.12rem;
}
.municipality-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.result-code-plate {
  display: grid;
  grid-template-columns: auto 5px auto;
  align-items: stretch;
  color: var(--white);
  background: var(--ink);
}
.result-code-plate code {
  padding: 5px 7px;
  color: inherit;
  font-family: ui-monospace, "Cascadia Mono", monospace;
  font-size: 0.92rem;
  font-weight: 800;
  letter-spacing: 0.09em;
}
.result-code-plate .code-check {
  background: var(--red);
}
.code-divider {
  background: var(--paper);
}
.type-badge {
  color: var(--blue);
  font-size: 0.62rem;
  font-weight: 900;
  text-align: right;
}
.municipality-location,
.municipality-kana {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.7rem;
}
.municipality-kana {
  min-height: 1.3em;
  margin-top: 3px;
  font-family: ui-monospace, "Cascadia Mono", monospace;
}
.territory-note {
  margin: 9px 0 0;
  padding: 6px 8px;
  color: #6b2c21;
  background: var(--red-pale);
  font-size: 0.65rem;
  font-weight: 800;
}
.card-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5px;
  margin-top: 13px;
}
.card-actions button,
.official-link {
  display: grid;
  place-items: center;
  min-height: 31px;
  padding: 5px 7px;
  border: 1px solid var(--ink);
  font-size: 0.66rem;
  font-weight: 800;
  cursor: pointer;
  text-decoration: none;
}
.copy-button {
  color: var(--white);
  background: var(--ink);
}
.copy-button.secondary {
  color: var(--ink);
  background: transparent;
}
.save-button {
  color: var(--blue);
  background: var(--blue-pale);
  border-color: #9ebbc5 !important;
}
.save-button.is-saved {
  color: var(--white);
  background: var(--blue);
}
.official-link {
  color: var(--red);
  border-color: #d1a095;
}
.load-more {
  display: block;
  width: 100%;
  margin-top: 13px;
  padding: 11px;
  color: var(--white);
  background: var(--blue);
  border: 0;
  font-weight: 800;
  cursor: pointer;
}
.loading-note,
.empty-result {
  grid-column: 1 / -1;
  padding: 35px 20px;
  color: var(--ink-soft);
  background: var(--paper);
  text-align: center;
}
.empty-result p {
  margin: 7px auto 15px;
  font-size: 0.8rem;
  line-height: 1.7;
}
.reset-button {
  padding: 7px 12px;
  background: var(--white);
  border: 1px solid var(--ink);
  font-size: 0.75rem;
  cursor: pointer;
}

.code-tray {
  position: sticky;
  top: 12px;
  border-top: 4px solid var(--red);
}
#saved-items {
  display: grid;
  gap: 1px;
  margin-top: 17px;
  background: var(--line);
}
.empty-tray {
  margin: 0;
  padding: 20px 14px;
  color: var(--ink-soft);
  background: var(--paper);
  font-size: 0.74rem;
  line-height: 1.7;
}
.saved-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 9px 10px;
  background: var(--white);
}
.saved-row span,
.saved-row strong,
.saved-row small {
  display: block;
  min-width: 0;
}
.saved-row strong {
  overflow: hidden;
  font-size: 0.76rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.saved-row small {
  margin-top: 2px;
  color: var(--ink-soft);
  font-family: ui-monospace, "Cascadia Mono", monospace;
  font-size: 0.6rem;
}
.remove-saved {
  padding: 4px 6px;
  background: transparent;
  border: 0;
  color: var(--red);
  font-size: 0.65rem;
  cursor: pointer;
}
.saved-actions {
  display: grid;
  gap: 6px;
  margin-top: 14px;
}
.saved-actions button {
  padding: 9px;
  color: var(--white);
  background: var(--red);
  border: 1px solid var(--red);
  font-size: 0.72rem;
  font-weight: 800;
  cursor: pointer;
}
.saved-actions .clear-button {
  color: var(--ink-soft);
  background: transparent;
  border-color: var(--line);
}
.saved-actions button:disabled {
  cursor: default;
  opacity: 0.42;
}

.content-page {
  min-height: calc(100vh - 155px);
  padding: 48px 0 62px;
}
.content-heading {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 27px;
}
.page-index {
  display: grid;
  place-items: center;
  width: 55px;
  height: 55px;
  color: var(--white);
  background: var(--red);
  font-family: "Yu Mincho", serif;
  font-size: 1.35rem;
}
.content-heading h1 {
  margin: 0;
  font-family: "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: clamp(1.55rem, 3.2vw, 2.25rem);
}
.instruction-grid,
.source-grid,
.privacy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.source-grid,
.privacy-grid {
  grid-template-columns: repeat(2, 1fr);
}
.instruction-grid section,
.source-grid section,
.privacy-grid section {
  padding: 23px;
  background: var(--white);
}
.instruction-grid section > b {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  color: var(--white);
  background: var(--blue);
  font-family: "Yu Mincho", serif;
}
.instruction-grid h2,
.source-grid h2,
.privacy-grid h2 {
  margin: 13px 0 7px;
  font-size: 0.93rem;
}
.source-grid h2,
.privacy-grid h2 {
  margin-top: 0;
}
.instruction-grid p,
.source-grid p,
.privacy-grid p,
.care-note p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.78rem;
  line-height: 1.85;
}
.code-anatomy {
  width: min(600px, 100%);
  margin: 25px auto;
}
.code-anatomy span {
  min-height: 84px;
}
.code-anatomy span:last-child {
  color: var(--white);
  background: var(--red);
}
.code-anatomy span:last-child small {
  color: var(--red-pale);
}
.care-note {
  margin-top: 22px;
  padding: 18px 20px;
  background: #e5ecec;
  border-left: 4px solid var(--blue);
}
.care-note strong {
  display: block;
  margin-bottom: 5px;
  font-size: 0.83rem;
}
.page-cta {
  display: inline-block;
  margin-top: 24px;
  padding: 10px 16px;
  color: var(--white);
  background: var(--ink);
  font-size: 0.78rem;
  font-weight: 800;
  text-decoration: none;
}
.source-ledger {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin: 22px 0 0;
  background: var(--line);
  border: 1px solid var(--line);
}
.source-ledger div {
  min-width: 0;
  padding: 13px;
  background: var(--white);
}
.source-ledger div:last-child {
  grid-column: 1 / -1;
}
.source-ledger dt {
  color: var(--ink-soft);
  font-size: 0.66rem;
  font-weight: 800;
}
.source-ledger dd {
  margin: 4px 0 0;
  font-size: 0.78rem;
}
.source-ledger code {
  overflow-wrap: anywhere;
  font-size: 0.68rem;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  min-height: 80px;
  padding: 22px 0;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
  font-size: 0.67rem;
}
.site-footer a {
  color: var(--ink-soft);
}
.not-found {
  display: grid;
  justify-items: center;
  min-height: calc(100vh - 155px);
  padding: 80px 20px;
  text-align: center;
}
.not-found > span {
  color: var(--red);
  font-family: ui-monospace, monospace;
  font-size: 2.4rem;
  font-weight: 900;
}
.not-found h1 {
  margin: 8px 0;
  font-family: "Yu Mincho", serif;
  font-size: 1.7rem;
}
.not-found p {
  color: var(--ink-soft);
}
.not-found a {
  padding: 9px 14px;
  color: var(--white);
  background: var(--ink);
  font-weight: 800;
  text-decoration: none;
}

@media (max-width: 920px) {
  .intro {
    grid-template-columns: 1fr;
    gap: 30px;
    min-height: 0;
  }
  .code-landscape {
    min-height: 320px;
  }
  .result-and-tray {
    grid-template-columns: 1fr;
  }
  .code-tray {
    position: static;
  }
}

@media (max-width: 680px) {
  .site-header,
  .site-footer,
  .home,
  .content-page {
    width: min(100% - 22px, 1180px);
  }
  .site-header {
    align-items: flex-start;
    min-height: 90px;
    padding: 14px 0;
  }
  .site-header nav {
    display: grid;
    gap: 2px;
    justify-items: end;
  }
  .intro {
    padding: 34px 0 28px;
  }
  .product-heading h1 {
    font-size: 2rem;
  }
  .directory-facts span {
    min-width: 0;
    flex: 1;
    padding-right: 10px;
  }
  .directory-facts span + span {
    padding-left: 10px;
  }
  .directory-facts strong {
    font-size: 1.05rem;
  }
  .code-landscape {
    min-height: 290px;
    padding: 20px 14px;
  }
  .map-blocks {
    width: 100%;
    grid-template-rows: repeat(5, 31px);
  }
  .code-plate b,
  .code-anatomy b {
    font-size: 1.45rem;
  }
  .code-plate span,
  .code-anatomy span {
    min-height: 64px;
    padding: 5px 7px;
  }
  .version-ribbon {
    grid-template-columns: 1fr auto;
    gap: 5px 12px;
  }
  .version-ribbon span {
    grid-column: 1 / -1;
    grid-row: 2;
  }
  .search-desk,
  .prefecture-board,
  .municipality-results,
  .code-tray {
    padding: 18px;
  }
  .region-row {
    grid-template-columns: 70px 1fr;
  }
  .municipality-list {
    grid-template-columns: 1fr;
  }
  .instruction-grid,
  .source-grid,
  .privacy-grid,
  .source-ledger {
    grid-template-columns: 1fr;
  }
  .source-ledger div:last-child {
    grid-column: auto;
  }
  .site-footer {
    display: grid;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}