:root {
  color-scheme: light;
  --ink: #182a38;
  --muted: #53616b;
  --paper: #ffffff;
  --wash: #f1f5f7;
  --line: #d2dce3;
  --accent: #00685e;
  --accent-wash: #e8f4f1;
  --preview: #fff1d3;
  --preview-ink: #6c4900;
  --content: 1140px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: system-ui, -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Yu Gothic", "Noto Sans CJK JP", sans-serif; font-size: 1rem; line-height: 1.9; overflow-wrap: anywhere; }
a { color: var(--accent); text-underline-offset: .22em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible { outline: 3px solid #b95200; outline-offset: 5px; border-radius: 2px; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { line-height: 1.5; letter-spacing: .01em; }
h1 { font-size: clamp(1.9rem, 3.2vw, 3.1rem); font-weight: 750; }
h2 { font-size: 1.6rem; }
h3 { font-size: 1.13rem; }
p { margin-bottom: 1.15em; }
ul, ol { padding-inline-start: 1.5em; }
li + li { margin-top: .55em; }
strong { font-weight: 700; }
small, .small { font-size: .875rem; }
[id] { scroll-margin-top: 1.5rem; }
.wrap { width: min(calc(100% - 48px), var(--content)); margin-inline: auto; }
.skip-link { position: absolute; top: -100px; left: 24px; z-index: 5; background: white; padding: .7rem 1rem; }
.skip-link:focus { top: 12px; }
.preview-bar { background: var(--preview); color: var(--preview-ink); font-size: .875rem; padding-block: .6rem; line-height: 1.65; }
.preview-bar strong { margin-right: .8em; }
.site-header { border-bottom: 1px solid var(--line); }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; padding-block: 1.35rem; }
.brand { display: inline-flex; flex-direction: column; gap: .1rem; color: var(--ink); text-decoration: none; line-height: 1.45; }
.brand-name { font-size: 1.35rem; font-weight: 750; letter-spacing: .02em; }
.brand-sub { color: var(--muted); font-size: .8rem; }
.main-nav { display: flex; flex-wrap: wrap; gap: .5rem 1.7rem; font-size: .93rem; }
.main-nav a { display: inline-flex; align-items: center; min-height: 44px; color: var(--ink); text-decoration: none; }
.main-nav a[aria-current="page"] { color: var(--accent); text-decoration: underline; text-decoration-thickness: 2px; }
.eyebrow { color: var(--accent); font-weight: 700; font-size: .875rem; letter-spacing: .08em; margin-bottom: 1rem; }
.home-main { padding-block: 4.5rem 4rem; }
.home-intro { display: grid; grid-template-columns: 1.05fr 1fr; gap: 4rem; align-items: start; }
.home-intro h1 { margin-bottom: 1.35rem; }
.lede { color: var(--muted); font-size: 1.06rem; }
.article-feature { border: 1px solid var(--line); border-top: 5px solid var(--accent); padding: 2rem; }
.feature-no { display: block; color: var(--muted); font-size: .8rem; letter-spacing: .12em; margin-bottom: 1.2rem; }
.article-feature h2 { margin-bottom: 1rem; font-size: 1.55rem; }
.article-feature h2 a { color: var(--ink); text-decoration: none; }
.article-feature h2 a:hover { color: var(--accent); text-decoration: underline; }
.article-feature p { color: var(--muted); }
.button-link { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: .55rem 1.3rem; background: var(--accent); color: white; text-decoration: none; font-weight: 650; }
.button-link:hover { background: #00544c; text-decoration: underline; }
.meta { display: flex; flex-wrap: wrap; gap: .2rem 1.2rem; color: var(--muted); font-size: .875rem; }
.home-method { margin-top: 4rem; padding-top: 2.5rem; border-top: 1px solid var(--line); }
.home-method h2 { margin-bottom: 1.5rem; }
.step-grid { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; counter-reset: steps; }
.step-grid li { margin: 0; counter-increment: steps; }
.step-grid h3::before { content: "0" counter(steps); display: block; color: var(--accent); font-size: .875rem; margin-bottom: .6rem; }
.step-grid p { color: var(--muted); }
.trial-note { background: var(--wash); margin-top: 2.5rem; padding: 1.25rem 1.5rem; font-size: .875rem; }
.trial-note p { margin: 0; }
.breadcrumb { padding-block: 1.25rem; color: var(--muted); font-size: .875rem; }
.breadcrumb ol { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: .6rem; }
.breadcrumb li { margin: 0; }
.breadcrumb li + li::before { content: "/"; margin-right: .6rem; }
.article-header { padding-block: 1.5rem 2.6rem; border-bottom: 1px solid var(--line); max-width: 900px; }
.article-header h1 { max-width: 20em; margin-bottom: .75rem; }
.article-header .subtitle { font-size: 1.12rem; color: var(--muted); margin-bottom: 1.3rem; }
.article-layout { display: grid; grid-template-columns: minmax(0, 760px) minmax(210px, 1fr); gap: 4rem; padding-block: 2.5rem 4rem; }
.article-body { min-width: 0; }
.article-body section { margin-top: 2.8rem; }
.article-body h2 { padding-top: 1rem; border-top: 1px solid var(--line); margin-bottom: 1.25rem; }
.article-body .section-no { font-size: .875rem; display: block; color: var(--accent); margin-bottom: .6rem; }
.aside-toc { align-self: start; position: sticky; top: 1.5rem; border-left: 2px solid var(--line); padding-left: 1.3rem; font-size: .875rem; }
.aside-toc h2 { font-size: 1rem; }
.aside-toc ol { padding-left: 1.15rem; }
.aside-toc li { padding-block: .1rem; }
.aside-toc a { display: inline-block; padding-block: .2rem; }
.key-point { border-left: 4px solid var(--accent); background: var(--accent-wash); padding: 1.25rem 1.5rem; margin-block: 1.6rem; }
.key-point p:last-child { margin-bottom: 0; }
.reference { white-space: nowrap; font-size: .8em; margin-left: .25em; }
.memo-list { padding: 0; margin: 1.5rem 0; display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.memo-list div { border: 1px solid var(--line); padding: 1.1rem 1.2rem; }
.memo-list dt { font-weight: 700; margin-bottom: .5rem; }
.memo-list dd { margin: 0; color: var(--muted); font-size: .93rem; }
.memo-help { color: var(--muted); font-size: .875rem; }
.article-disclaimer { padding-top: 1.5rem; border-top: 1px solid var(--line); color: var(--muted); font-size: .875rem; margin-top: 2.5rem; }
.source-summary { font-size: .875rem; }
.source-summary li { margin-top: .8rem; }
.back-link { display: inline-block; margin-top: 1.5rem; min-height: 44px; }
.simple-page { max-width: 820px; padding-block: 2rem 4rem; }
.simple-page h1 { margin-bottom: 1.2rem; }
.source-list { list-style: none; padding: 0; margin-top: 2.5rem; }
.source-list > li { padding-block: 1.7rem; border-top: 1px solid var(--line); margin: 0; }
.source-list h2 { font-size: 1.22rem; margin-bottom: .7rem; }
.source-list p:last-child { margin-bottom: 0; }
.source-list .source-label { font-size: .875rem; color: var(--accent); font-weight: 700; margin-bottom: .5rem; }
.source-list .source-date { color: var(--muted); font-size: .875rem; }
.site-footer { border-top: 1px solid var(--line); background: var(--wash); padding-block: 2rem; color: var(--muted); font-size: .875rem; }
.footer-inner { display: flex; align-items: start; justify-content: space-between; gap: 2rem; }
.site-footer p { margin-bottom: .3rem; }
.site-footer .footer-brand { color: var(--ink); font-weight: 700; }
.footer-links { display: flex; flex-wrap: wrap; gap: 1rem; }
.footer-links a { padding-block: .2rem; }
@media (max-width: 900px) {
  .home-intro { gap: 2rem; }
  .article-layout { gap: 2.2rem; grid-template-columns: minmax(0, 1fr) 210px; }
  .aside-toc { padding-left: 1rem; }
}
@media (max-width: 700px) {
  .wrap { width: min(calc(100% - 36px), var(--content)); }
  .header-inner { align-items: start; flex-direction: column; gap: .6rem; padding-block: 1rem .65rem; }
  .main-nav { gap: .3rem 1.4rem; }
  .home-main { padding-block: 2.4rem 2.5rem; }
  .home-intro { grid-template-columns: 1fr; gap: 1.8rem; }
  .article-feature { padding: 1.5rem; }
  .home-method { margin-top: 2.5rem; padding-top: 2rem; }
  .step-grid { grid-template-columns: 1fr; gap: .75rem; }
  .step-grid h3::before { display: inline; margin-right: .75rem; }
  .trial-note { margin-top: 1.5rem; padding: 1.1rem; }
  .article-header { padding-block: 1rem 1.6rem; }
  .article-header h1 { font-size: 2rem; }
  .article-layout { display: flex; flex-direction: column; gap: 2rem; padding-block: 1.6rem 2.5rem; }
  .aside-toc { order: -1; position: static; border-left: 0; border-block: 1px solid var(--line); padding: 1.1rem 0; width: 100%; }
  .aside-toc h2 { margin-bottom: .6rem; }
  .aside-toc ol { margin: 0; }
  .aside-toc li { margin: 0; }
  .article-body h2 { font-size: 1.45rem; }
  .article-body section { margin-top: 2.3rem; }
  .memo-list { grid-template-columns: 1fr; }
  .key-point { padding: 1rem 1.1rem; }
  .footer-inner { flex-direction: column; gap: 1rem; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
@media print {
  body { color: black; font-size: 10.5pt; line-height: 1.7; }
  .wrap { width: 100%; max-width: none; }
  .site-header, .breadcrumb, .aside-toc, .site-footer, .back-link, .skip-link { display: none; }
  .preview-bar { background: none; color: black; border-bottom: 1px solid black; }
  .article-layout { display: block; padding-top: 1.5rem; }
  h1 { font-size: 24pt; }
  h2 { font-size: 16pt; }
  h2, h3 { break-after: avoid; }
  .memo-list div { break-inside: avoid; }
  a { color: black; }
}