:root {
  --article-ink: #172a3a;
  --article-soft: #385163;
  --article-muted: #71818b;
  --article-line: #d9e4e9;
  --article-paper: #f7fafb;
  --article-white: #fff;
  --article-navy: #12344a;
  --article-orange: #e86f4d;
  --article-orange-dark: #bb4b32;
  --article-blue: #237b9b;
  --article-shadow: 0 18px 45px rgba(23, 42, 58, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--article-paper);
  color: var(--article-ink);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Yu Gothic", YuGothic, Meiryo, sans-serif;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

:focus-visible {
  outline: 3px solid rgba(232, 111, 77, 0.48);
  outline-offset: 3px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.article-skip-link {
  position: absolute;
  top: -80px;
  left: 16px;
  z-index: 10;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--article-navy);
  color: #fff;
  text-decoration: none;
}

.article-skip-link:focus {
  top: 16px;
}

.article-site-header,
.article-shell,
.article-site-footer {
  width: min(1040px, calc(100% - 40px));
  margin-inline: auto;
}

.article-site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 20px;
}

.article-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--article-navy);
  text-decoration: none;
}

.article-brand-mark {
  display: inline-grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border-radius: 8px;
  background: var(--article-navy);
  color: #fff;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: -0.08em;
}

.article-brand-copy {
  display: grid;
  line-height: 1.1;
}

.article-brand-copy strong {
  font-size: 14px;
  letter-spacing: 0.04em;
}

.article-brand-copy small {
  margin-top: 4px;
  color: var(--article-muted);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.article-back-link,
.article-text-link {
  color: var(--article-orange-dark);
  font-size: 12px;
  font-weight: 800;
  text-underline-offset: 4px;
}

.article-back-link {
  text-decoration: none;
}

.article-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0 0;
  color: var(--article-muted);
  font-size: 11px;
}

.article-breadcrumb a {
  text-underline-offset: 3px;
}

.article-hero {
  margin-top: 18px;
  padding: 46px 48px 42px;
  border-radius: 22px;
  background:
    linear-gradient(90deg, rgba(10, 32, 48, 0.88), rgba(10, 32, 48, 0.56)),
    linear-gradient(180deg, #1c536b, #12344a);
  box-shadow: var(--article-shadow);
  color: #fff;
}

.article-hero--compact {
  padding-block: 34px;
}

.article-eyebrow,
.article-kicker {
  color: var(--article-orange);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.article-hero h1 {
  max-width: 780px;
  margin: 10px 0 12px;
  font-size: clamp(27px, 4vw, 45px);
  letter-spacing: -0.055em;
  line-height: 1.22;
}

.article-hero--compact h1 {
  max-width: 820px;
  font-size: clamp(26px, 3.4vw, 39px);
}

.article-hero p {
  max-width: 720px;
  margin: 0;
  color: rgba(255, 255, 255, 0.76);
  font-size: 15px;
}

.article-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin-top: 18px;
  color: rgba(255, 255, 255, 0.62);
  font-size: 11px;
}

.article-index {
  margin: 44px 0 70px;
}

.article-index h2 {
  margin: 8px 0 18px;
  font-size: 22px;
  letter-spacing: -0.04em;
}

.article-card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.article-card {
  display: block;
  min-height: 190px;
  padding: 24px 24px 22px;
  border-top: 3px solid var(--article-orange);
  background: var(--article-white);
  box-shadow: 0 10px 28px rgba(23, 42, 58, 0.05);
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.article-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 34px rgba(23, 42, 58, 0.1);
}

.article-card-tag {
  color: var(--article-orange-dark);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.15em;
}

.article-card h3 {
  margin: 10px 0 8px;
  font-size: 19px;
  letter-spacing: -0.04em;
  line-height: 1.4;
}

.article-card p {
  margin: 0;
  color: var(--article-soft);
  font-size: 13px;
}

.article-card-arrow {
  display: block;
  margin-top: 18px;
  color: var(--article-orange-dark);
  font-size: 12px;
  font-weight: 800;
}

.article-index-note,
.article-callout {
  padding: 16px 18px;
  border-left: 3px solid var(--article-blue);
  background: #eef6f8;
  color: var(--article-soft);
  font-size: 12px;
}

.article-index-note {
  margin-top: 18px;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 230px;
  gap: 52px;
  align-items: start;
  margin: 44px 0 72px;
}

.article-main {
  min-width: 0;
}

.article-main > .article-breadcrumb {
  margin-top: 0;
}

.article-main h1 {
  margin: 20px 0 10px;
  font-size: clamp(27px, 4vw, 42px);
  letter-spacing: -0.055em;
  line-height: 1.28;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin-bottom: 30px;
  color: var(--article-muted);
  font-size: 11px;
}

.article-lead {
  margin: 0 0 34px;
  color: var(--article-soft);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.9;
}

.article-toc {
  display: grid;
  gap: 7px;
  margin: 0 0 36px;
  padding: 16px 18px;
  border-block: 1px solid var(--article-line);
  font-size: 12px;
}

.article-toc strong {
  font-size: 11px;
  letter-spacing: 0.08em;
}

.article-toc a {
  color: var(--article-orange-dark);
  font-weight: 700;
  text-underline-offset: 3px;
}

.article-prose h2 {
  margin: 46px 0 14px;
  padding-top: 18px;
  border-top: 1px solid var(--article-line);
  font-size: 23px;
  letter-spacing: -0.045em;
  line-height: 1.4;
}

.article-prose h3 {
  margin: 28px 0 8px;
  font-size: 17px;
  letter-spacing: -0.03em;
}

.article-prose p {
  margin: 0 0 16px;
  color: var(--article-soft);
  font-size: 14px;
}

.article-prose ul {
  margin: 8px 0 20px;
  padding-left: 1.25em;
  color: var(--article-soft);
  font-size: 14px;
}

.article-prose li + li {
  margin-top: 6px;
}

.formula-block {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin: 22px 0 10px;
  padding: 22px 18px;
  background: var(--article-navy);
  color: #fff;
  text-align: center;
}

.formula-block strong {
  font-size: 16px;
}

.formula-block span:not(.formula-mark) {
  color: rgba(255, 255, 255, 0.86);
  font-size: 13px;
  font-weight: 700;
}

.formula-mark {
  color: var(--article-orange);
  font-size: 18px;
  font-weight: 800;
}

.formula-note {
  color: var(--article-muted) !important;
  font-size: 12px !important;
  text-align: center;
}

.article-table-wrap {
  overflow-x: auto;
  margin: 18px 0 22px;
}

.article-table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  background: var(--article-white);
  font-size: 13px;
}

.article-table th,
.article-table td {
  padding: 11px 13px;
  border-bottom: 1px solid var(--article-line);
  text-align: left;
  vertical-align: top;
}

.article-table th {
  width: 28%;
  color: var(--article-navy);
  font-weight: 800;
}

.article-table td {
  color: var(--article-soft);
}

.article-table thead th {
  width: auto;
  background: #edf4f7;
}

.article-step-list {
  display: grid;
  gap: 12px;
  margin: 20px 0 24px;
  padding: 0;
  list-style: none;
}

.article-step {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 13px;
  align-items: start;
}

.article-step-no {
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  border-radius: 50%;
  background: var(--article-orange);
  color: #fff;
  font-size: 12px;
  font-weight: 800;
}

.article-step strong {
  display: block;
  margin-top: 2px;
  color: var(--article-navy);
  font-size: 14px;
}

.article-step p {
  margin: 2px 0 0;
  font-size: 13px;
}

.article-example {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  margin: 18px 0;
}

.article-example div {
  padding: 13px 10px;
  border-top: 2px solid var(--article-blue);
  background: #eef6f8;
  text-align: center;
}

.article-example span,
.article-stat span {
  display: block;
  color: var(--article-muted);
  font-size: 10px;
}

.article-example strong {
  display: block;
  margin-top: 3px;
  color: var(--article-navy);
  font-size: 16px;
}

.article-source-list {
  display: grid;
  gap: 8px;
  margin: 18px 0 0;
  padding-left: 18px;
  color: var(--article-soft);
  font-size: 13px;
}

.article-source-list a {
  color: var(--article-orange-dark);
  text-underline-offset: 3px;
}

.article-rail {
  position: sticky;
  top: 20px;
  padding-top: 52px;
}

.article-rail-box {
  padding: 18px 16px;
  border-top: 2px solid var(--article-orange);
  background: var(--article-white);
}

.article-rail-box strong {
  display: block;
  color: var(--article-navy);
  font-size: 13px;
}

.article-rail-box p {
  margin: 8px 0 14px;
  color: var(--article-soft);
  font-size: 12px;
  line-height: 1.7;
}

.article-rail-box a {
  color: var(--article-orange-dark);
  font-size: 12px;
  font-weight: 800;
  text-underline-offset: 3px;
}

.article-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 20px 0 22px;
}

.article-stat {
  padding: 15px 14px;
  border-top: 2px solid var(--article-orange);
  background: var(--article-white);
}

.article-stat strong {
  display: block;
  margin: 3px 0 1px;
  color: var(--article-navy);
  font-size: 23px;
  letter-spacing: -0.04em;
  line-height: 1.2;
}

.article-stat small {
  color: var(--article-muted);
  font-size: 10px;
}

.article-faq {
  margin-top: 20px;
}

.article-faq details {
  border-bottom: 1px solid var(--article-line);
}

.article-faq summary {
  padding: 12px 0;
  color: var(--article-navy);
  cursor: pointer;
  font-size: 13px;
  font-weight: 800;
}

.article-faq p {
  padding-bottom: 10px;
  font-size: 13px;
}

.article-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: 46px;
  padding: 18px 20px;
  background: var(--article-navy);
  color: #fff;
}

.article-cta p {
  margin: 0;
  color: rgba(255, 255, 255, 0.75);
  font-size: 12px;
}

.article-cta a {
  color: #fff;
  font-size: 12px;
  font-weight: 800;
  text-underline-offset: 4px;
}

.article-site-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 0 28px;
  border-top: 1px solid var(--article-line);
  color: var(--article-muted);
  font-size: 10px;
}

.article-site-footer a {
  color: var(--article-orange-dark);
  font-weight: 700;
  text-underline-offset: 3px;
}

.graph-detail-visual {
  margin: 24px 0 22px;
  padding: 20px 20px 16px;
  border-top: 3px solid var(--article-orange);
  background: var(--article-white);
  box-shadow: var(--article-shadow);
}

.graph-detail-visual svg {
  display: block;
  width: 100%;
  height: clamp(340px, 52vw, 560px);
  overflow: visible;
}

.graph-detail-visual .chart-grid line {
  stroke: var(--article-line);
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
}

.graph-detail-visual .chart-grid .chart-tick {
  stroke: var(--article-muted);
}

.graph-detail-visual .chart-grid text {
  fill: var(--article-muted);
  font-size: 10px;
  font-weight: 700;
}

.graph-detail-visual .chart-grid .chart-x-label {
  font-size: 10px;
  font-weight: 600;
}

.graph-detail-visual .trend-line {
  fill: none;
  stroke: var(--article-orange);
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 3;
  vector-effect: non-scaling-stroke;
}

.graph-detail-visual .trend-line-multi {
  stroke: var(--line-color);
}

.graph-detail-visual .trend-dot {
  fill: var(--article-orange);
  stroke: #fff;
  stroke-width: 2.5;
  vector-effect: non-scaling-stroke;
}

.graph-detail-visual .trend-dot-multi {
  fill: var(--line-color);
}

.graph-detail-visual .trend-dot--enter {
  opacity: 0;
  transform-box: fill-box;
  transform-origin: center;
}

@keyframes graph-detail-dot-pop {
  0% { opacity: 0; transform: scale(0.35); }
  70% { opacity: 1; transform: scale(1.12); }
  100% { opacity: 1; transform: scale(1); }
}

.graph-detail-visual .is-chart-visible .trend-dot--enter {
  animation: graph-detail-dot-pop 280ms cubic-bezier(0.2, 0.8, 0.3, 1) 620ms both;
}

.graph-detail-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 9px 18px;
  margin-top: 12px;
  color: var(--article-muted);
  font-size: 11px;
  font-weight: 700;
}

.graph-detail-legend-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.graph-detail-legend-swatch {
  display: inline-block;
  width: 25px;
  height: 0;
  border-top: 3px solid var(--legend-color);
}

.graph-detail-legend-swatch[data-dash]:not([data-dash=""]) {
  border-top-style: dashed;
}

.graph-detail-summary {
  margin: 12px 0 0;
  padding-top: 10px;
  border-top: 1px solid var(--article-line);
  color: var(--article-muted);
  font-size: 12px;
}

.graph-detail-map {
  position: relative;
  display: grid;
  min-height: 420px;
  place-items: center;
  overflow: hidden;
}

.graph-detail-map svg {
  height: clamp(360px, 58vw, 620px);
}

.graph-detail-map .map-prefecture {
  cursor: default;
  fill: #d9edf0;
  stroke: #fff;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 4;
  vector-effect: non-scaling-stroke;
}

.graph-detail-map .map-prefecture[data-level="1"] { fill: #f0f7f8; }
.graph-detail-map .map-prefecture[data-level="2"] { fill: #d9edf0; }
.graph-detail-map .map-prefecture[data-level="3"] { fill: #abd9df; }
.graph-detail-map .map-prefecture[data-level="4"] { fill: #e7aa82; }
.graph-detail-map .map-prefecture[data-level="5"] { fill: #cc5746; }
.graph-detail-map .map-prefecture[data-level="none"] { fill: #eef2f3; }

.graph-detail-map .map-prefecture:hover,
.graph-detail-map .map-prefecture:focus-visible,
.graph-detail-map .map-prefecture.is-selected {
  filter: drop-shadow(0 5px 5px rgba(23, 42, 58, 0.2));
  stroke: var(--article-orange);
  stroke-width: 7;
}

.graph-detail-map #prefecture-borders,
.graph-detail-map .boundary-line {
  pointer-events: none;
  stroke: rgba(255, 255, 255, 0.72);
  stroke-width: 3;
  vector-effect: non-scaling-stroke;
}

.graph-detail-map-selection {
  margin: 8px 0 0;
  color: var(--article-muted);
  font-size: 12px;
}

.graph-detail-map-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  margin-top: 12px;
  color: var(--article-muted);
  font-size: 11px;
  font-weight: 700;
}

.graph-detail-map-legend-item {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.graph-detail-map-swatch {
  width: 15px;
  height: 15px;
  border-radius: 4px;
}

.graph-detail-error {
  margin: 24px 0;
  padding: 16px;
  background: #fff4ef;
  color: var(--article-orange-dark);
  font-size: 13px;
}

@media (max-width: 760px) {
  .graph-detail-visual {
    margin-inline: -2px;
    padding: 13px 0 10px;
    background: transparent;
    box-shadow: none;
  }

  .graph-detail-visual svg {
    height: clamp(300px, 68vw, 480px);
  }

  .graph-detail-map {
    min-height: 300px;
  }

  .graph-detail-map svg {
    height: clamp(300px, 74vw, 500px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .graph-detail-visual .is-chart-visible .trend-dot--enter {
    animation: none;
    opacity: 1;
  }
}

.labor-detail-controls {
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: 360px;
  margin-top: 18px;
}

.labor-detail-controls label {
  flex: 0 0 auto;
  color: var(--article-muted);
  font-size: 12px;
  font-weight: 800;
}

.labor-detail-controls .select-wrap {
  position: relative;
  flex: 1;
}

.labor-detail-controls .select-wrap::after {
  position: absolute;
  top: 50%;
  right: 13px;
  width: 7px;
  height: 7px;
  border-right: 2px solid var(--article-blue);
  border-bottom: 2px solid var(--article-blue);
  content: "";
  pointer-events: none;
  transform: translateY(-65%) rotate(45deg);
}

.labor-detail-controls select {
  width: 100%;
  min-height: 38px;
  appearance: none;
  padding: 0 36px 0 12px;
  border: 1px solid var(--article-line);
  border-radius: 8px;
  background: var(--article-white);
  color: var(--article-ink);
  font: inherit;
  font-size: 13px;
  font-weight: 700;
}

.labor-detail-occupation-note {
  display: grid;
  gap: 2px;
  margin: 12px 0 0;
  color: var(--article-muted);
  font-size: 12px;
}

.labor-detail-occupation-note strong {
  color: var(--article-navy);
  font-size: 15px;
}

.labor-detail-visual {
  margin-top: 18px;
}

.labor-detail-map {
  min-height: 520px;
}

.labor-detail-map svg {
  height: clamp(440px, 55vw, 680px);
  opacity: 0;
  transform-origin: center;
  transform-box: fill-box;
  transform: translateY(18px) scale(0.94);
}

@keyframes labor-detail-map-enter {
  0% {
    opacity: 0;
    transform: translateY(18px) scale(0.94);
  }

  70% {
    opacity: 1;
    transform: translateY(-4px) scale(1.01);
  }

  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.labor-detail-map svg.is-map-visible {
  animation: labor-detail-map-enter 720ms cubic-bezier(0.22, 0.75, 0.25, 1.08) both;
}

@media (max-width: 760px) {
  .labor-detail-controls {
    max-width: none;
  }

  .labor-detail-map {
    min-height: 330px;
  }

  .labor-detail-map svg {
    height: clamp(330px, 78vw, 500px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .labor-detail-map svg,
  .labor-detail-map svg.is-map-visible {
    animation: none;
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 760px) {
  .article-site-header,
  .article-shell,
  .article-site-footer {
    width: min(100% - 24px, 620px);
  }

  .article-site-header {
    min-height: 60px;
  }

  .article-back-link {
    font-size: 11px;
  }

  .article-hero {
    margin-top: 12px;
    padding: 30px 20px 26px;
    border-radius: 16px;
  }

  .article-hero h1,
  .article-hero--compact h1 {
    font-size: 28px;
  }

  .article-hero p {
    font-size: 13px;
  }

  .article-card-grid,
  .article-layout {
    grid-template-columns: 1fr;
  }

  .article-index {
    margin: 34px 0 50px;
  }

  .article-layout {
    gap: 12px;
    margin: 32px 0 52px;
  }

  .article-main h1 {
    font-size: 29px;
  }

  .article-lead {
    font-size: 14px;
  }

  .article-prose h2 {
    margin-top: 38px;
    font-size: 20px;
  }

  .article-example,
  .article-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .article-rail {
    position: static;
    padding-top: 4px;
  }

  .article-site-footer {
    flex-direction: column;
  }
}

@media (max-width: 420px) {
  .article-example,
  .article-stats {
    grid-template-columns: 1fr;
  }

  .formula-block {
    gap: 5px;
    padding-inline: 12px;
  }
}

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

  .article-card {
    transition: none;
  }
}