:root {
  --night: #0b1c22;
  --night-2: #123038;
  --night-3: #1a4450;
  --ink: #f3ead6;
  --ink-dim: #c9bea4;
  --lamp: #e8c56b;
  --lamp-soft: #f4dc9a;
  --shelf: #7a4e28;
  --shelf-dark: #4c2e16;
  --spine-1: #9e2b22;
  --spine-2: #1d3d73;
  --spine-3: #2c5e48;
  --spine-4: #c47a22;
  --spine-5: #5c3d7a;
  --warn: #e08a4c;
  --line: rgba(243, 234, 214, 0.14);
  --display: "Shippori Mincho", "Hiragino Mincho ProN", serif;
  --sans: "IBM Plex Sans JP", "Hiragino Kaku Gothic ProN", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(1200px 480px at 10% -10%, rgba(232, 197, 107, 0.09), transparent 55%),
    linear-gradient(180deg, #0e242c 0%, var(--night) 180px);
  font-family: var(--sans);
  line-height: 1.65;
}

img {
  max-width: 100%;
}

a {
  color: var(--lamp);
}

.skip-link {
  position: absolute;
  left: 0.8rem;
  top: -3rem;
  padding: 0.4rem 0.7rem;
  background: var(--lamp);
  color: var(--night);
  z-index: 20;
}

.skip-link:focus {
  top: 0.8rem;
}

.site-header {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 1rem 1.4rem;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: rgba(11, 28, 34, 0.92);
  backdrop-filter: blur(10px);
  z-index: 10;
}

.wordmark {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: inherit;
  text-decoration: none;
  font-family: var(--display);
  font-size: 0.95rem;
  line-height: 1.15;
  letter-spacing: 0.08em;
}

.wordmark-mark {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border: 1px solid var(--lamp);
  color: var(--lamp);
  font-size: 0.85rem;
}

.site-nav {
  display: flex;
  gap: 1rem;
  margin-left: auto;
  font-size: 0.85rem;
}

.site-nav a {
  color: var(--ink-dim);
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--ink);
}

.site-nav a[aria-current="page"] {
  color: var(--lamp);
}

.edition {
  margin: 0;
  font-size: 0.72rem;
  color: var(--ink-dim);
  letter-spacing: 0.12em;
}

main {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
  padding-bottom: 4rem;
}

.hero {
  padding: 3.2rem 0 1.5rem;
}

.kicker {
  margin: 0 0 0.8rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--lamp);
}

h1,
h2,
h3 {
  font-family: var(--display);
  font-weight: 600;
  line-height: 1.25;
}

h1 {
  margin: 0 0 1rem;
  font-size: clamp(1.8rem, 4.4vw, 3.1rem);
  letter-spacing: 0.02em;
}

h1 em {
  font-style: normal;
  color: var(--lamp);
}

.lede {
  max-width: 42rem;
  color: var(--ink-dim);
  margin: 0 0 1.8rem;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.8rem;
  margin: 0;
}

.hero-stats div {
  padding: 0.9rem 1rem;
  border: 1px solid var(--line);
  background: rgba(18, 48, 56, 0.55);
}

.hero-stats dt {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--ink-dim);
}

.hero-stats dd {
  margin: 0.2rem 0 0;
  font-family: var(--mono);
  font-size: 1.15rem;
}

.section-heading {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  align-items: end;
  margin-bottom: 1rem;
}

.section-heading p:last-child {
  margin: 0;
  max-width: 34rem;
  color: var(--ink-dim);
  font-size: 0.92rem;
}

.section-code {
  margin: 0 0 0.35rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--lamp);
}

.hint {
  margin: 0 0 1rem;
  color: var(--ink-dim);
  font-size: 0.88rem;
}

.tokai-banner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem 1.5rem;
  margin: 0.5rem 0 0.2rem;
  padding: 1.1rem 1.2rem;
  border: 1px solid var(--line);
  background: rgba(18, 48, 56, 0.55);
}

.tokai-banner h2 {
  margin: 0.15rem 0 0.35rem;
  font-size: 1.15rem;
}

.tokai-banner p {
  margin: 0;
  color: var(--ink-dim);
  font-size: 0.92rem;
}

.tokai-banner-link {
  display: inline-block;
  padding: 0.45rem 0.9rem;
  background: var(--lamp);
  color: var(--night);
  text-decoration: none;
  font-weight: 600;
  white-space: nowrap;
}

.shelf-hero,
.ranking,
.charts,
.method,
.sources,
.disclaimer {
  padding: 2.4rem 0 0.5rem;
}

.spine-rail {
  display: flex;
  align-items: end;
  gap: 0.45rem;
  min-height: 280px;
  padding: 1.2rem 0.8rem 0;
  border-bottom: 14px solid var(--shelf);
  box-shadow: 0 14px 0 var(--shelf-dark);
  overflow-x: auto;
}

.spine {
  flex: 0 0 auto;
  width: 3.1rem;
  min-height: 6rem;
  border: 0;
  padding: 0.55rem 0.25rem 0.7rem;
  cursor: pointer;
  color: var(--ink);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  box-shadow: inset -6px 0 0 rgba(0, 0, 0, 0.18);
}

.spine-0 { background: linear-gradient(90deg, #b13329, var(--spine-1)); }
.spine-1 { background: linear-gradient(90deg, #274a86, var(--spine-2)); }
.spine-2 { background: linear-gradient(90deg, #357256, var(--spine-3)); }
.spine-3 { background: linear-gradient(90deg, #d4892c, var(--spine-4)); color: #1a1208; }
.spine-4 { background: linear-gradient(90deg, #6e4a90, var(--spine-5)); }

.spine-rank {
  font-family: var(--mono);
  font-size: 0.7rem;
}

.spine-name {
  writing-mode: vertical-rl;
  font-family: var(--display);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  max-height: 72%;
  overflow: hidden;
}

.spine-area {
  font-family: var(--mono);
  font-size: 0.58rem;
  writing-mode: vertical-rl;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1rem;
  align-items: end;
  margin: 1.2rem 0;
  padding: 0.9rem 1rem;
  background: rgba(18, 48, 56, 0.55);
  border: 1px solid var(--line);
}

.controls label {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.75rem;
  color: var(--ink-dim);
}

select,
input[type="search"] {
  font: inherit;
  color: var(--ink);
  background: var(--night);
  border: 1px solid var(--night-3);
  border-radius: 4px;
  padding: 0.35rem 0.5rem;
  min-width: 10rem;
}

.seg {
  display: inline-flex;
  border: 1px solid var(--night-3);
  border-radius: 4px;
  overflow: hidden;
}

.seg button {
  font: inherit;
  color: var(--ink-dim);
  background: transparent;
  border: 0;
  padding: 0.4rem 0.9rem;
  cursor: pointer;
}

.seg button + button {
  border-left: 1px solid var(--night-3);
}

.seg button.is-active {
  background: var(--lamp);
  color: var(--night);
}

.result-line {
  font-size: 0.88rem;
  color: var(--ink-dim);
}

.chart-card {
  margin: 1rem 0 1.6rem;
  padding: 1rem 1rem 1.1rem;
  border: 1px solid var(--line);
  background: rgba(8, 22, 27, 0.45);
}

.chart-heading {
  margin: 0 0 0.6rem;
  font-size: 1rem;
}

.chart-sub {
  font-family: var(--sans);
  font-size: 0.78rem;
  font-weight: 400;
  color: var(--ink-dim);
  margin-left: 0.4rem;
}

#rank-chart-wrap,
.chart-box {
  position: relative;
  width: 100%;
}

.chart-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
}

.ledger {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.ledger th,
.ledger td {
  padding: 0.55rem 0.7rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.ledger th {
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--ink-dim);
  font-weight: 500;
}

.ledger .num {
  text-align: right;
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.ledger tbody tr:hover {
  background: rgba(232, 197, 107, 0.06);
}

.store-btn {
  appearance: none;
  border: 0;
  padding: 0;
  background: none;
  color: inherit;
  font: inherit;
  cursor: pointer;
  text-align: left;
}

.store-btn:hover {
  color: var(--lamp);
}

.chip {
  display: inline-block;
  margin-right: 0.3rem;
  padding: 0.05rem 0.4rem;
  border: 1px solid var(--line);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
}

.chip.warn {
  border-color: var(--warn);
  color: var(--warn);
}

.chip.local {
  border-color: #c45a52;
  color: #f0c2bd;
}

.chip.national {
  border-color: #5a7cb0;
  color: #c5d4ee;
}

.chart-legend {
  display: flex;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--ink-dim);
  margin: 0 0 0.6rem;
}

.chart-legend i {
  display: inline-block;
  width: 0.7rem;
  height: 0.7rem;
  margin-right: 0.3rem;
  vertical-align: -0.05rem;
}

.chart-legend .swatch-local { background: #9e2b22; }
.chart-legend .swatch-national { background: #1d3d73; }
.chart-legend .swatch-compound { background: #c47a22; }
.chart-legend .swatch-book { background: #1d3d73; }

.method-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.method-grid article,
.disclaimer-list,
.source-list {
  background: rgba(18, 48, 56, 0.4);
  border: 1px solid var(--line);
}

.method-grid article {
  padding: 1rem 1.1rem;
}

.method-grid h3 {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
}

.method-grid p,
.source-note {
  margin: 0;
  color: var(--ink-dim);
}

.source-list,
.disclaimer-list {
  padding: 1rem 1.2rem 1rem 2rem;
  color: var(--ink-dim);
}

.source-note {
  margin-top: 0.8rem;
}

.store-dialog {
  position: fixed;
  inset: 0;
  background: rgba(4, 12, 14, 0.72);
  display: grid;
  place-items: center;
  padding: 1rem;
  z-index: 30;
}

.store-dialog[hidden] {
  display: none;
}

.dialog-card {
  width: min(36rem, 100%);
  max-height: min(86vh, 40rem);
  overflow: auto;
  background: #14343c;
  border: 1px solid var(--lamp);
  padding: 1.3rem 1.3rem 1.4rem;
  position: relative;
}

.dialog-close {
  position: absolute;
  top: 0.6rem;
  right: 0.7rem;
  border: 0;
  background: none;
  color: var(--ink);
  font-size: 1.4rem;
  cursor: pointer;
}

.dialog-kicker {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--lamp);
}

.dialog-facts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem 1rem;
}

.dialog-facts dt {
  font-size: 0.72rem;
  color: var(--ink-dim);
}

.dialog-facts dd {
  margin: 0;
  font-family: var(--mono);
}

.dialog-note {
  color: var(--ink-dim);
}

.dialog-sources {
  padding-left: 1.1rem;
  margin: 0;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1.5rem;
  justify-content: space-between;
  padding: 1.4rem;
  border-top: 1px solid var(--line);
  color: var(--ink-dim);
  font-size: 0.82rem;
}

.site-footer p {
  margin: 0;
}

:focus-visible {
  outline: 2px solid var(--lamp);
  outline-offset: 3px;
}

@media (max-width: 860px) {
  .site-header {
    flex-wrap: wrap;
  }

  .site-nav {
    width: 100%;
    margin-left: 0;
    order: 3;
  }

  .hero-stats,
  .chart-grid,
  .method-grid,
  .dialog-facts,
  .section-heading {
    grid-template-columns: 1fr;
    flex-direction: column;
    align-items: start;
  }

  .spine {
    width: 2.55rem;
  }

  .controls label,
  select,
  input[type="search"] {
    width: 100%;
    min-width: 0;
  }
}

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

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