:root { color-scheme: light; --ink: #102636; --muted: #536471; --line: #dce2e6; --paper: #f5f7f8; --accent: #b35c38; }
* { box-sizing: border-box; }
html { scroll-padding-top: 120px; }
body { margin: 0; background: #fff; color: var(--ink); font: 16px/1.9 Inter, "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", system-ui, sans-serif; overflow-wrap: anywhere; }
a { color: inherit; text-underline-offset: .25em; }
a:hover { color: #754025; }
button, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid #276cb3; outline-offset: 4px; }
button { font: inherit; }
[hidden] { display: none !important; }
.skip-link { position: absolute; z-index: 10; top: -100px; left: 16px; padding: 10px 18px; background: var(--ink); color: white; }
.skip-link:focus { top: 8px; }
.site-header { position: sticky; top: 0; z-index: 5; background: #fffffff5; border-bottom: 1px solid var(--line); }
.header-inner { max-width: 1248px; padding: 20px 40px; margin: auto; display: flex; align-items: center; gap: 28px; }
.brand { display: flex; align-items: center; gap: 12px; font-size: 23px; font-weight: 800; letter-spacing: -.04em; text-decoration: none; white-space: nowrap; }
.brand-bars { display: flex; gap: 3px; align-items: end; width: 29px; height: 29px; flex-shrink: 0; }
.brand-bars i { display: block; background: var(--ink); height: 29px; width: 8px; }
.brand-bars i:nth-child(2) { height: 19px; background: #314554; }
.brand-bars i:nth-child(3) { height: 10px; background: var(--accent); }
.site-header nav { margin-left: auto; display: flex; gap: 19px; font-size: 13px; font-weight: 650; white-space: nowrap; }
.site-header nav a { text-decoration: none; }
.languages { display: flex; align-items: center; gap: 4px; padding-left: 14px; border-left: 1px solid var(--line); white-space: nowrap; font-size: 13px; }
.languages a { text-decoration: none; padding: 5px 9px; border-radius: 2px; }
.languages a[aria-current] { background: var(--ink); color: #fff; }
.page { width: min(100% - 80px, 1040px); margin: auto; }
.hero { padding: 36px 0 54px; }
.back-link { font-size: 13px; color: var(--muted); }
.eyebrow { margin: 33px 0 12px; font-size: 12px; font-weight: 700; letter-spacing: .12em; color: #865136; }
h1 { max-width: 1000px; font-size: 43px; line-height: 1.5; letter-spacing: -.035em; margin: 0 0 14px; text-wrap: balance; }
.hero-subtitle { max-width: 900px; margin: 0 0 20px; font-size: 19px; line-height: 1.75; font-weight: 600; text-wrap: pretty; }
h2 { font-size: 24px; letter-spacing: -.02em; line-height: 1.5; margin: 0 0 22px; }
h3 { font-size: 20px; margin: 0 0 20px; }
.date { color: var(--muted); font-size: 13px; margin: 10px 0 26px; }
.lede { max-width: 900px; font-size: 17px; margin: 0 0 24px; }
.scope-tags { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 0 0 30px; }
.scope-tags li { padding: 3px 10px; font-size: 12px; background: var(--paper); color: var(--muted); }
.hero-links { display: flex; gap: 24px; align-items: center; flex-wrap: wrap; font-size: 14px; font-weight: 650; }
.hero-links a { text-decoration: none; }
.primary-link { display: inline-flex; align-items: center; justify-content: space-between; gap: 24px; background: var(--ink); color: white; padding: 11px 18px; text-decoration: none; border: 1px solid var(--ink); }
.primary-link:hover { background: #304654; color: white; }
section { border-top: 1px solid var(--line); padding: 46px 0; }
section > p { max-width: 930px; margin: 0 0 20px; }
section > p:last-child { margin-bottom: 0; }
code { font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: .85em; background: var(--paper); padding: 2px 5px; }
.flow { margin: 28px 0 0; }
.flow figcaption { font-size: 13px; color: var(--muted); margin-bottom: 12px; }
.flow ol { padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); list-style: none; border-block: 1px solid var(--line); }
.flow li { padding: 20px 16px 20px 0; }
.flow li + li { padding-left: 20px; border-left: 1px solid var(--line); }
.flow strong, .flow li > span { display: block; }
.flow strong { font-size: 15px; font-weight: 650; }
.flow li > span { font-size: 12px; color: var(--muted); }
.flow .step-number { color: var(--accent); font-family: ui-monospace, monospace; margin-bottom: 6px; }
.glossary-list { margin: 0; font-size: 14px; }
.glossary-list > div { display: grid; grid-template-columns: minmax(160px, 29%) 1fr; gap: 24px; padding: 12px 0; border-top: 1px solid var(--line); }
.glossary-list dt { font-weight: 650; }
.glossary-list dd { margin: 0; }
details { margin-top: 22px; padding-top: 16px; border-top: 1px solid var(--line); }
summary { cursor: pointer; font-size: 14px; font-weight: 650; }
details .glossary-list { margin-top: 16px; }
.glossary-details { margin: 0; padding: 0; border: 0; }
.glossary-details > summary h2 { display: inline; margin: 0; }
.glossary-sources { font-size: 12px; color: var(--muted); margin-bottom: 0; }
.setting-details p { font-size: 14px; margin: 16px 0 0; }
.dataset-note { color: var(--muted); font-size: 13px; }
.dataset-note span { display: block; margin-top: 8px; font-family: ui-monospace, monospace; }
.dataset-sample { margin-top: 24px; padding-top: 20px; }
.dataset-sample > summary { font-size: 16px; }
.sample-number { color: var(--accent); margin-right: 8px; font-family: ui-monospace, monospace; }
.sample-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 32px; margin-top: 24px; }
.sample-screen { margin: 0; min-width: 0; }
.sample-screen-window { max-height: 420px; overflow: auto; border: 1px solid var(--line); background: white; }
.sample-screen img { display: block; width: 100%; height: auto; }
.sample-screen figcaption { font-size: 12px; color: var(--muted); margin-top: 12px; }
.sample-body { min-width: 0; }
.sample-body h3 { font-size: 14px; margin: 0 0 16px; }
.sample-input { margin: 0 0 24px; font-size: 14px; }
.sample-input > div + div { margin-top: 16px; }
.sample-input dt { color: var(--muted); font-size: 12px; margin-bottom: 4px; }
.sample-input dd { margin: 0; }
.sample-options { padding: 0; margin: 0 0 24px; list-style: none; font-size: 13px; }
.sample-options li { display: grid; grid-template-columns: 88px minmax(0, 1fr); gap: 12px; padding: 8px 0; border-top: 1px solid var(--line); }
.sample-options code { align-self: start; width: fit-content; }
.sample-answer { background: var(--paper); padding: 16px; border-left: 3px solid var(--accent); }
.sample-answer p { margin: 0 0 12px; font-size: 14px; }
.sample-answer .small-label { font-size: 12px; }
.sample-answer pre { font-size: 12px; line-height: 1.6; margin: 0; white-space: pre-wrap; overflow-wrap: anywhere; }
.sample-record { font-size: 12px; color: var(--muted); margin: 20px 0 0; overflow-wrap: anywhere; }
.dataset-download { font-size: 14px; margin-top: 24px; }
@media (max-width: 767px) {
  .sample-grid { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .sample-screen-window { max-height: 360px; }
}
.table-wrap { margin: 26px 0; overflow-x: auto; border: 1px solid var(--line); }
table { width: 100%; border-collapse: collapse; font-size: 14px; line-height: 1.7; }
th, td { padding: 16px 20px; text-align: left; vertical-align: top; }
th { background: var(--paper); font-weight: 650; }
td { border-top: 1px solid var(--line); }
td:not(:first-child) { font-size: 22px; font-weight: 650; white-space: nowrap; font-variant-numeric: tabular-nums; }
.examples { margin: 28px 0; border: 1px solid var(--line); padding: 26px 30px 18px; }
.record-label { margin: 0 0 18px; font-size: 12px; color: var(--muted); }
.example-buttons { display: flex; gap: 8px; margin-bottom: 26px; }
.example-buttons button { cursor: pointer; font-size: 14px; font-weight: 650; line-height: 1.5; padding: 10px 24px; border: 1px solid var(--line); background: white; color: var(--ink); border-radius: 2px; }
.example-buttons button[aria-pressed=true] { background: var(--ink); border-color: var(--ink); color: white; }
.small-label { color: var(--muted); font-size: 12px; margin-bottom: 6px; }
.instruction { border-left: 3px solid var(--accent); padding: 0 0 0 16px; margin: 0 0 24px; font-size: 15px; }
.readback { font-size: 13px; font-weight: 650; color: #2e5e52; margin: 0 0 10px; }
.fields { margin: 0; }
.fields > div { display: grid; grid-template-columns: minmax(130px, 25%) 1fr; padding: 11px 0; border-top: 1px solid var(--line); gap: 16px; font-size: 14px; }
.fields dt { color: var(--muted); }
.fields dd { margin: 0; font-weight: 600; font-variant-numeric: tabular-nums; }
.continuation { margin-top: 20px; padding: 16px 18px; background: var(--paper); font-size: 14px; }
.continuation p { margin: 4px 0 0; }
.stop-note { font-size: 12px; color: var(--muted); border-top: 1px solid var(--line); padding-top: 18px; margin: 20px 0 0; }
.example-panel + .example-panel { margin-top: 30px; }
.operation-video { margin: 34px 0 0; padding-top: 28px; border-top: 1px solid var(--line); max-width: 960px; }
.operation-video h3 { margin-bottom: 16px; }
.operation-video video { display: block; width: 100%; height: auto; background: #111; border: 1px solid var(--line); }
.operation-video figcaption { color: var(--muted); font-size: 13px; margin-top: 12px; }
.operation-video figcaption p { margin: 0 0 6px; }
.related-figure { margin: 24px 0 0; }
.backtest-window { position: relative; aspect-ratio: 4008 / 3078; overflow: hidden; background: #101115; }
.backtest-window img { position: absolute; width: 105.688623%; max-width: none; height: auto; left: -2.844311%; top: -10.331384%; }
.related-figure figcaption { margin-top: 12px; font-size: 13px; color: var(--muted); }
.related-figure figcaption p { margin: 0 0 6px; }
.image-page { margin: 28px auto; width: calc(100% - 40px); max-width: 1440px; }
.image-page h1 { font-size: 28px; margin: 24px 0 12px; }
.image-page p { font-size: 14px; margin: 8px 0; }
.image-scroll { margin-top: 20px; max-height: 75vh; overflow: auto; border: 1px solid var(--line); }
.image-scroll .backtest-window { width: 4008px; }
.evidence { display: flex; gap: 24px; align-items: start; justify-content: space-between; }
.evidence p { font-size: 14px; max-width: 600px; margin: 0; }
.evidence-links { display: flex; align-items: start; flex-direction: column; gap: 14px; font-size: 13px; flex-shrink: 0; }
.site-footer { display: flex; justify-content: space-between; gap: 24px; border-top: 1px solid var(--line); padding: 30px max(40px, calc((100vw - 1040px) / 2)); font-size: 13px; color: var(--muted); }
.site-footer strong { color: var(--ink); font-size: 15px; }
.site-footer p { margin: 5px 0 0; }
@media (max-width: 1050px) {
  .header-inner { gap: 14px; flex-wrap: wrap; padding: 16px 30px; }
  .languages { margin-left: auto; }
  .site-header nav { order: 3; width: 100%; gap: 22px; overflow-x: auto; }
}
@media (max-width: 600px) {
  html { scroll-padding-top: 135px; }
  .header-inner { padding: 12px 20px; gap: 12px; }
  .brand { font-size: 20px; gap: 9px; }
  .brand-bars { transform: scale(.85); transform-origin: left center; width: 25px; }
  .languages { padding-left: 8px; gap: 0; font-size: 12px; }
  .languages a { padding: 4px 7px; }
  .site-header nav { font-size: 12px; gap: 18px; padding-bottom: 3px; }
  .page { width: calc(100% - 40px); }
  .hero { padding: 24px 0 36px; }
  .eyebrow { margin-top: 25px; }
  h1 { font-size: 31px; line-height: 1.55; }
  .hero-subtitle { font-size: 16px; }
  h2 { font-size: 23px; }
  body { font-size: 15px; }
  .lede { font-size: 16px; }
  .date { font-size: 12px; }
  .hero-links { gap: 18px; font-size: 13px; }
  section { padding: 34px 0; }
  .flow ol { grid-template-columns: 1fr 1fr; }
  .flow li { padding: 15px 10px 15px 0; }
  .flow li:nth-child(odd) { padding-left: 0; border-left: 0; }
  .flow li:nth-child(n+3) { border-top: 1px solid var(--line); }
  .flow strong { font-size: 14px; }
  th, td { padding: 12px 10px; font-size: 12px; }
  td:not(:first-child) { font-size: 17px; }
  .glossary-list > div { grid-template-columns: 1fr; gap: 5px; }
  .examples { padding: 20px 16px 16px; }
  .example-buttons { margin-bottom: 22px; }
  .example-buttons button { padding: 10px 18px; }
  .fields > div { grid-template-columns: minmax(90px, 34%) 1fr; gap: 10px; font-size: 13px; }
  .evidence { flex-direction: column; }
  .evidence-links { flex-direction: row; align-items: center; gap: 20px; flex-wrap: wrap; }
  .site-footer { padding: 26px 20px; flex-direction: column; gap: 12px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
@media print { .site-header, .hero-links, .example-buttons { display: none !important; } .example-panel[hidden] { display: block !important; } .page { width: 100%; } section { padding: 20px 0; } }