:root {
  color-scheme: light;
  --ink: #182936;
  --ink-soft: #53626b;
  --paper: #f2f4f1;
  --card: #fffefd;
  --line: #cfd6d2;
  --line-dark: #93a09b;
  --blue: #2b6384;
  --blue-dark: #203f56;
  --blue-pale: #dbe9ef;
  --orange: #d8703d;
  --orange-pale: #f4dfd2;
  --yellow: #e7b84b;
  --shadow: 0 12px 32px rgb(29 50 58 / 9%);
  font-family: "Yu Gothic UI", "Hiragino Sans", Meiryo, sans-serif;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}
html {
  background: var(--paper);
  color: var(--ink);
  scroll-behavior: smooth;
}
body {
  margin: 0;
  min-width: 320px;
}
a {
  color: var(--blue-dark);
  text-underline-offset: 0.2em;
}
button,
input,
select {
  color: inherit;
  font: inherit;
}
button,
select {
  cursor: pointer;
}
button:focus-visible,
input:focus-visible,
select:focus-visible,
a:focus-visible {
  outline: 3px solid #f3a778;
  outline-offset: 3px;
}

.site-header {
  align-items: center;
  background: rgb(255 254 253 / 96%);
  border-bottom: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  min-height: 68px;
  padding: 0 4vw;
  position: sticky;
  top: 0;
  z-index: 20;
}

.brand {
  align-items: center;
  display: inline-flex;
  font-size: 0.98rem;
  font-weight: 750;
  gap: 0.72rem;
  text-decoration: none;
}

.brand-mark {
  display: inline-block;
  height: 28px;
  position: relative;
  width: 31px;
}
.brand-mark i {
  background: var(--card);
  border: 2px solid var(--blue-dark);
  height: 22px;
  left: 1px;
  position: absolute;
  top: 1px;
  width: 22px;
}
.brand-mark i:last-child {
  background: var(--orange-pale);
  left: 8px;
  top: 6px;
}
.brand-mark i:last-child::after {
  background: var(--orange);
  content: "";
  height: 3px;
  left: 4px;
  position: absolute;
  top: 6px;
  width: 10px;
}

.site-header nav {
  display: flex;
  gap: clamp(0.75rem, 2.2vw, 2rem);
}
.site-header nav a {
  color: var(--ink-soft);
  font-size: 0.84rem;
  font-weight: 650;
  text-decoration: none;
}
.site-header nav a:hover {
  color: var(--blue-dark);
}

main {
  margin: 0 auto;
  max-width: 1240px;
  padding: 0 4vw 6rem;
}
.hero-shell {
  align-items: center;
  display: grid;
  gap: clamp(2.4rem, 7vw, 7rem);
  grid-template-columns: minmax(260px, 0.82fr) minmax(390px, 1.18fr);
  min-height: 530px;
  padding: 4.2rem 0 3.5rem;
}

.period-label,
.section-kicker {
  color: var(--blue);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  margin: 0 0 0.75rem;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}
h1 {
  font-size: clamp(1.8rem, 3.5vw, 2.45rem);
  letter-spacing: -0.035em;
  line-height: 1.33;
  margin: 0;
}
h2 {
  font-size: clamp(1.25rem, 2vw, 1.65rem);
  letter-spacing: -0.02em;
  line-height: 1.35;
  margin: 0;
}
h3 {
  font-size: 1.05rem;
  margin: 0;
}
.lead {
  color: var(--ink-soft);
  font-size: 1rem;
  line-height: 1.9;
  margin: 1.2rem 0 0;
  max-width: 34rem;
}

.hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1.8rem;
}
.hero-facts span {
  align-items: baseline;
  background: var(--card);
  border: 1px solid var(--line);
  display: inline-flex;
  font-size: 0.78rem;
  gap: 0.38rem;
  padding: 0.55rem 0.72rem;
}
.hero-facts b {
  color: var(--blue-dark);
  font-size: 1rem;
}

.ratio-figure {
  background: #e2e8e5;
  border: 1px solid #bcc8c3;
  box-shadow: var(--shadow);
  height: 368px;
  overflow: hidden;
  padding: 54px 42px 34px;
  position: relative;
}
.ratio-figure::before,
.ratio-figure::after {
  background: #c8d1cd;
  content: "";
  height: 100%;
  position: absolute;
  top: 0;
  width: 1px;
}
.ratio-figure::before {
  left: 22px;
}
.ratio-figure::after {
  right: 22px;
}
.file-tabs {
  display: flex;
  gap: 0.42rem;
  left: 42px;
  position: absolute;
  top: 20px;
}
.file-tabs span {
  background: var(--card);
  border: 1px solid var(--line-dark);
  border-bottom: 3px solid var(--yellow);
  font-size: 0.68rem;
  font-weight: 700;
  padding: 0.38rem 0.55rem;
}
.job-file {
  background: var(--card);
  border: 2px solid var(--blue-dark);
  box-shadow: 8px 9px 0 rgb(32 63 86 / 12%);
}
.general-file {
  height: 242px;
  padding: 1.15rem;
  position: relative;
  width: min(78%, 380px);
}
.file-head {
  align-items: flex-start;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}
.file-head span {
  color: var(--ink-soft);
  font-size: 0.72rem;
  font-weight: 700;
}
.file-head b {
  font-size: 0.96rem;
  font-variant-numeric: tabular-nums;
}
.file-rules {
  display: grid;
  gap: 0.48rem;
  margin-top: 1.1rem;
}
.file-rules i {
  background: #d5dbd8;
  display: block;
  height: 5px;
}
.file-rules i:nth-child(2) {
  width: 84%;
}
.file-rules i:nth-child(3) {
  width: 64%;
}
.regular-file {
  background: #fdf5ef;
  border-color: var(--orange);
  bottom: -38px;
  box-shadow: 7px 7px 0 rgb(216 112 61 / 13%);
  height: 136px;
  left: 78px;
  padding: 1rem;
  position: absolute;
  width: 76%;
}
.regular-file .file-rules i {
  background: #e8c7b4;
}
.hero-ring {
  bottom: 22px;
  height: 150px;
  position: absolute;
  right: 26px;
  width: 150px;
}
.ring-track,
.ring-value {
  fill: none;
  stroke-width: 9;
}
.ring-track {
  stroke: #d6dcda;
}
.ring-value {
  stroke: var(--orange);
  stroke-linecap: round;
  transform: rotate(-90deg);
  transform-origin: center;
}
.ring-number {
  fill: var(--ink);
  font-size: 20px;
  font-weight: 800;
  text-anchor: middle;
}
.ring-caption {
  fill: var(--ink-soft);
  font-size: 8px;
  font-weight: 650;
  text-anchor: middle;
}

.compare-panel {
  background: var(--card);
  border: 1px solid var(--line-dark);
  box-shadow: var(--shadow);
  margin-bottom: 3.5rem;
  padding: clamp(1.2rem, 3vw, 2rem);
}
.section-heading {
  align-items: flex-end;
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
}
.compare-heading {
  border-bottom: 1px solid var(--line);
  padding-bottom: 1.2rem;
}
.compare-actions {
  align-items: center;
  display: flex;
  gap: 0.75rem;
}
.compare-actions > span {
  background: var(--blue-pale);
  color: var(--blue-dark);
  font-size: 0.76rem;
  font-weight: 800;
  padding: 0.5rem 0.62rem;
}
button {
  background: var(--blue-dark);
  border: 1px solid var(--blue-dark);
  color: white;
  font-size: 0.78rem;
  font-weight: 750;
  min-height: 38px;
  padding: 0.58rem 0.8rem;
}
button:hover:not(:disabled) {
  background: var(--blue);
}
button:disabled {
  cursor: not-allowed;
  opacity: 0.48;
}

.metric-controls {
  align-items: end;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 1.25rem 0 0;
}
label {
  display: grid;
  gap: 0.38rem;
}
label > span {
  color: var(--ink-soft);
  font-size: 0.72rem;
  font-weight: 750;
}
input,
select {
  background: var(--card);
  border: 1px solid var(--line-dark);
  border-radius: 0;
  min-height: 42px;
  padding: 0.55rem 0.72rem;
}
select {
  min-width: 158px;
}
.ratio-legend {
  display: flex;
  gap: 0.9rem;
  margin-left: auto;
  padding-bottom: 0.65rem;
}
.ratio-legend span {
  align-items: center;
  color: var(--ink-soft);
  display: inline-flex;
  font-size: 0.72rem;
  gap: 0.38rem;
}
.ratio-legend i {
  border: 1px solid var(--line-dark);
  display: inline-block;
  height: 9px;
  width: 24px;
}
.legend-regular {
  background: var(--orange);
}
.legend-other {
  background: #d6dcda;
}
.metric-note {
  color: var(--ink-soft);
  font-size: 0.76rem;
  line-height: 1.7;
  margin: 0.8rem 0 1.2rem;
}
.empty-compare {
  background: var(--paper);
  border: 1px dashed var(--line-dark);
  color: var(--ink-soft);
  font-size: 0.84rem;
  padding: 1.5rem;
  text-align: center;
}

.compare-list {
  display: grid;
  gap: 0.85rem;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}
.compare-card {
  border: 1px solid var(--line);
  min-width: 0;
  padding: 0.85rem;
}
.compare-title {
  align-items: flex-start;
  display: flex;
  justify-content: space-between;
}
.compare-title > div {
  display: grid;
  gap: 0.18rem;
}
.compare-title span {
  color: var(--ink-soft);
  font-size: 0.66rem;
}
.compare-title strong {
  font-size: 0.96rem;
}
.compare-title button {
  background: transparent;
  border: 0;
  color: var(--ink-soft);
  font-size: 1.1rem;
  min-height: 28px;
  padding: 0 0.2rem;
}
.compare-chart {
  align-items: center;
  display: grid;
  gap: 0.4rem;
  grid-template-columns: 82px 1fr;
  margin-top: 0.6rem;
}
.ratio-ring {
  display: block;
  width: 82px;
}
.card-ring-value {
  fill: var(--ink);
  font-size: 16px;
  font-weight: 800;
  text-anchor: middle;
}
.sparkline {
  display: block;
  height: 62px;
  overflow: visible;
  width: 100%;
}
.spark-grid {
  stroke: var(--line);
  stroke-width: 1;
}
.spark-path {
  fill: none;
  stroke: var(--blue);
  stroke-linejoin: round;
  stroke-width: 2.2;
}
.spark-marker {
  fill: var(--orange);
  stroke: var(--card);
  stroke-width: 1.5;
}
.year-scale {
  color: var(--ink-soft);
  display: flex;
  font-size: 0.58rem;
  justify-content: space-between;
  margin: -0.1rem 0 0.6rem 84px;
}
.count-pair {
  border-top: 1px solid var(--line);
  display: grid;
  gap: 0.5rem;
  margin: 0;
  padding-top: 0.65rem;
}
.count-pair div {
  align-items: baseline;
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
}
.count-pair dt {
  color: var(--ink-soft);
  font-size: 0.62rem;
}
.count-pair dd {
  font-size: 0.74rem;
  font-variant-numeric: tabular-nums;
  font-weight: 750;
  margin: 0;
}

.finder {
  margin: 0 0 1.5rem;
}
.finder .section-heading {
  border-bottom: 1px solid var(--line-dark);
  padding-bottom: 1rem;
}
#data-status {
  color: var(--ink-soft);
  font-size: 0.72rem;
  margin: 0;
}
.controls {
  display: grid;
  gap: 0.8rem;
  grid-template-columns: minmax(220px, 1fr) repeat(2, minmax(170px, 0.4fr));
  padding-top: 1rem;
}
.controls input,
.controls select {
  width: 100%;
}
.results-section {
  margin-top: 2rem;
}
.results-heading {
  align-items: center;
  display: flex;
  justify-content: space-between;
  margin-bottom: 1rem;
}
.results-heading p {
  color: var(--ink-soft);
  font-size: 0.76rem;
  margin: 0;
}
.results-heading b {
  color: var(--ink);
  font-size: 1.05rem;
}

.place-grid {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.place-card {
  background: var(--card);
  border: 1px solid var(--line);
  display: grid;
  gap: 0.8rem;
  padding: 1rem;
}
.place-card:hover {
  border-color: var(--line-dark);
  box-shadow: 0 6px 18px rgb(29 50 58 / 7%);
}
.place-heading {
  align-items: flex-start;
  display: flex;
  justify-content: space-between;
}
.place-heading p {
  color: var(--ink-soft);
  font-size: 0.62rem;
  margin: 0 0 0.18rem;
}
.place-heading h3 {
  font-size: 1rem;
}
.place-heading > strong {
  color: var(--orange);
  font-size: 1.2rem;
  font-variant-numeric: tabular-nums;
}
.ratio-bar {
  display: block;
  height: 12px;
  width: 100%;
}
.ratio-track {
  fill: #d6dcda;
}
.ratio-value {
  fill: var(--orange);
}
.place-counts {
  display: grid;
  gap: 0.42rem;
  margin: 0;
}
.place-counts div {
  align-items: baseline;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}
.place-counts dt {
  color: var(--ink-soft);
  font-size: 0.67rem;
}
.place-counts dd {
  font-size: 0.76rem;
  font-variant-numeric: tabular-nums;
  font-weight: 750;
  margin: 0;
}
.compare-button {
  background: transparent;
  color: var(--blue-dark);
  margin-top: auto;
  width: 100%;
}
.compare-button:hover:not(:disabled),
.compare-button.is-selected {
  background: var(--blue-dark);
  color: white;
}
.no-results {
  background: var(--card);
  border: 1px dashed var(--line-dark);
  grid-column: 1 / -1;
  padding: 2.5rem;
  text-align: center;
}
.no-results > span {
  color: var(--orange);
  font-size: 2rem;
  font-weight: 800;
}
.no-results p {
  color: var(--ink-soft);
}

.boundary {
  align-items: flex-start;
  background: #fff7ef;
  border: 1px solid #e1b79d;
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
  padding: 1rem;
}
.boundary > span {
  align-items: center;
  background: var(--orange);
  color: white;
  display: flex;
  flex: 0 0 38px;
  font-weight: 800;
  height: 38px;
  justify-content: center;
}
.boundary strong {
  font-size: 0.86rem;
}
.boundary p {
  color: #684d3f;
  font-size: 0.75rem;
  line-height: 1.7;
  margin: 0.3rem 0 0;
}

.text-page {
  max-width: 1040px;
  padding-top: 4rem;
}
.page-intro {
  border-bottom: 1px solid var(--line-dark);
  padding-bottom: 2rem;
}
.page-intro p:last-child {
  color: var(--ink-soft);
  line-height: 1.85;
  margin: 1rem 0 0;
  max-width: 48rem;
}
.definition-board {
  align-items: stretch;
  display: grid;
  gap: 1.2rem;
  grid-template-columns: 1.35fr 0.65fr;
  margin-top: 2rem;
}
.definition-general {
  background: var(--card);
  border: 2px solid var(--blue-dark);
  padding: 1.3rem;
}
.definition-general > span,
.definition-regular > span,
.formula-card > span,
.guide-grid article > span {
  color: var(--ink-soft);
  font-size: 0.68rem;
  font-weight: 800;
}
.definition-general > p,
.definition-regular p,
.formula-card p,
.guide-grid p {
  color: var(--ink-soft);
  font-size: 0.82rem;
  line-height: 1.75;
}
.definition-regular {
  background: #fff5ee;
  border: 2px solid var(--orange);
  margin: 1.2rem 0 0 16%;
  padding: 1rem;
}
.definition-regular h3 {
  margin-top: 0.25rem;
}
.formula-card {
  align-content: center;
  background: var(--blue-pale);
  border: 1px solid #9cb7c3;
  display: grid;
  padding: 1.4rem;
}
.formula-card strong {
  display: block;
  font-size: 1rem;
  line-height: 1.6;
  margin-top: 0.5rem;
}
.guide-grid,
.privacy-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 2rem;
}
.guide-grid article,
.privacy-grid article {
  background: var(--card);
  border: 1px solid var(--line);
  padding: 1.2rem;
}
.guide-grid h2,
.privacy-grid h2 {
  font-size: 1rem;
  margin-top: 0.35rem;
}
.privacy-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.privacy-grid p {
  color: var(--ink-soft);
  font-size: 0.82rem;
  line-height: 1.75;
}
.note-panel {
  background: var(--card);
  border-left: 5px solid var(--orange);
  margin-top: 1.2rem;
  padding: 1.4rem;
}
.note-panel h2 {
  font-size: 1.05rem;
}
.note-panel p {
  color: var(--ink-soft);
  font-size: 0.84rem;
  line-height: 1.8;
}
.note-panel a {
  font-size: 0.8rem;
  font-weight: 700;
}
.source-ledger {
  border-left: 1px solid var(--line-dark);
  border-top: 1px solid var(--line-dark);
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  margin-top: 2rem;
}
.source-ledger > div {
  border-bottom: 1px solid var(--line-dark);
  border-right: 1px solid var(--line-dark);
  display: grid;
  gap: 0.55rem;
  padding: 1rem;
}
.source-ledger span {
  color: var(--ink-soft);
  font-size: 0.65rem;
}
.source-ledger strong {
  font-size: 0.78rem;
  line-height: 1.55;
}
.source-ledger a {
  font-size: 0.72rem;
}
.prose-section {
  margin-top: 2rem;
}
.prose-section h2 {
  font-size: 1.1rem;
}
.prose-section p,
.prose-section li {
  color: var(--ink-soft);
  font-size: 0.84rem;
  line-height: 1.8;
}

footer {
  align-items: flex-start;
  background: var(--ink);
  color: white;
  display: flex;
  justify-content: space-between;
  padding: 2.4rem 4vw;
}
footer strong {
  font-size: 0.9rem;
}
footer p {
  color: #bdc7cc;
  font-size: 0.7rem;
  margin: 0.45rem 0 0;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}
.footer-links a {
  color: #e3e9eb;
  font-size: 0.72rem;
}

@media (max-width: 980px) {
  .hero-shell {
    grid-template-columns: 1fr;
    padding-top: 3rem;
  }
  .ratio-figure {
    max-width: 680px;
    width: 100%;
  }
  .compare-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .place-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .source-ledger {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 700px) {
  .site-header {
    align-items: flex-start;
    gap: 0.75rem;
    padding-bottom: 0.7rem;
    padding-top: 0.7rem;
    position: static;
  }
  .brand {
    min-height: 36px;
  }
  .site-header nav {
    display: grid;
    gap: 0.25rem 0.8rem;
    grid-template-columns: repeat(2, auto);
  }
  .site-header nav a {
    font-size: 0.72rem;
  }
  main {
    padding-left: 1rem;
    padding-right: 1rem;
  }
  .hero-shell {
    min-height: auto;
    padding: 2.5rem 0;
  }
  .ratio-figure {
    height: 330px;
    padding-left: 24px;
    padding-right: 24px;
  }
  .file-tabs {
    left: 24px;
  }
  .general-file {
    width: 88%;
  }
  .regular-file {
    left: 36px;
  }
  .hero-ring {
    height: 118px;
    right: 9px;
    width: 118px;
  }
  .section-heading {
    align-items: flex-start;
    flex-direction: column;
  }
  .compare-actions {
    justify-content: space-between;
    width: 100%;
  }
  .metric-controls {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }
  .metric-controls select {
    min-width: 0;
    width: 100%;
  }
  .ratio-legend {
    grid-column: 1 / -1;
    margin-left: 0;
  }
  .compare-list,
  .place-grid,
  .guide-grid,
  .privacy-grid,
  .definition-board {
    grid-template-columns: 1fr;
  }
  .controls {
    grid-template-columns: 1fr;
  }
  .source-ledger {
    grid-template-columns: 1fr 1fr;
  }
  footer {
    flex-direction: column;
    gap: 1.5rem;
  }
}

@media (max-width: 430px) {
  .ratio-figure {
    height: 302px;
    padding-top: 52px;
  }
  .general-file {
    height: 210px;
    padding: 0.8rem;
  }
  .regular-file {
    bottom: -26px;
    height: 118px;
    left: 22px;
  }
  .hero-ring {
    bottom: 8px;
  }
  .source-ledger {
    grid-template-columns: 1fr;
  }
  .compare-chart {
    grid-template-columns: 76px 1fr;
  }
  .year-scale {
    margin-left: 78px;
  }
}

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