:root {
  color-scheme: light dark;
  --bg: #fff;
  --panel: #f6f7f9;
  --text: #20242b;
  --heading: #10151e;
  --muted: #586270;
  --line: #dfe4eb;
  --accent: #1769cf;
  --accent-soft: #edf4fd;
  --header: rgba(255,255,255,.94);
  --sans: -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  --mono: "SF Mono",ui-monospace,Menlo,monospace;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--bg); }
body { margin: 0; min-width: 320px; color: var(--text); font-family: var(--sans); -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
a:focus-visible, summary:focus-visible, [tabindex="0"]:focus-visible { outline: 2px solid var(--accent); outline-offset: 5px; border-radius: 3px; }
::selection { background: var(--accent-soft); color: var(--heading); }
.skip-link { position: fixed; top: -80px; left: 20px; padding: 12px 18px; z-index: 50; background: var(--bg); border: 1px solid var(--accent); }
.skip-link:focus { top: 18px; }
.site-header { position: fixed; z-index: 20; top: 16px; left: 4vw; right: 4vw; height: 58px; padding: 0 16px; display: flex; align-items: center; justify-content: space-between; gap: 18px; border: 1px solid var(--line); border-radius: 18px; background: var(--header); backdrop-filter: blur(18px); }
.identity { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.identity img { display: block; border-radius: 8px; }
.identity span { display: grid; gap: 3px; }
.identity strong { font-size: 13px; }
.identity small { font-size: 10px; color: var(--muted); }
.header-link { padding: 9px 12px; border: 1px solid var(--line); border-radius: 999px; font-size: 12px; font-weight: 650; white-space: nowrap; }
.header-link:hover { border-color: var(--accent); color: var(--accent); }
.progress { position: absolute; left: 50%; transform: translateX(-50%); width: clamp(390px,43vw,580px); display: grid; grid-template-columns: repeat(6,minmax(0,1fr)); gap: 3px; padding: 3px; border: 1px solid var(--line); border-radius: 999px; background: var(--panel); }
.progress a { min-width: 0; padding: 7px 6px; border-radius: 999px; text-align: center; color: var(--muted); font-size: 12px; white-space: nowrap; transition: color .2s ease,background .2s ease; }
.progress a[aria-current] { background: var(--heading); color: var(--bg); }
.overview { padding-top: 104px; }
.reading { position: relative; width: min(1600px,92vw); min-height: calc(100dvh - 104px); margin: 0 auto; padding: 42px 0; display: grid; grid-template-columns: minmax(0,1.18fr) minmax(0,.82fr); gap: clamp(44px,6vw,96px); align-items: center; scroll-margin-top: 104px; }
.reading + .reading { border-top: 1px solid var(--line); }
.reading article { max-width: 540px; min-width: 0; }
.reading h1, .reading h2 { margin: 0 0 25px; color: var(--heading); font-size: clamp(32px,3.2vw,48px); line-height: 1.3; letter-spacing: -.035em; font-weight: 700; }
.reading p { margin: 0 0 20px; color: var(--muted); font-size: 15px; line-height: 1.95; overflow-wrap: anywhere; }
.reading .kicker { margin-bottom: 24px; color: var(--accent); font-size: 12px; font-weight: 650; }
.reading .lead { margin-bottom: 22px; color: var(--text); font-size: 16px; line-height: 1.85; }
.reading .chapter-time { margin-bottom: 18px; color: var(--accent); font-size: 12px; font-weight: 650; }
/* Artwork keeps the same image-and-article rhythm as the other project cases. */
.visual { position: relative; margin: 0; width: 100%; min-width: 0; aspect-ratio: 16/9; overflow: hidden; background: var(--bg); }
.visual.hero { aspect-ratio: 1672/941; border: 1px solid var(--line); border-radius: 14px; }
.visual img { display: block; width: 100%; height: 100%; object-fit: contain; }
.opening-combined { padding-top: 34px; padding-bottom: 56px; }
.opening-art { width: 100%; min-width: 0; margin: 0; }
.opening-combined h1 { font-size: clamp(30px,3vw,44px); }
.opening-combined .kicker { margin-bottom: 18px; }
.opening-caption { margin-top: 14px; color: var(--muted); font-size: 12px; line-height: 1.85; }
.opening-caption > span { display: block; }
.opening-caption .stat-scope { margin-top: 8px; }
.meta { margin: 28px 0 0; border-top: 1px solid var(--heading); }
.meta div { display: grid; grid-template-columns: 76px minmax(0,1fr); gap: 12px; padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 12px; line-height: 1.8; }
.meta dt { color: var(--muted); }
.meta dd { margin: 0; }
.text-link { display: inline-flex; gap: 22px; align-items: center; max-width: 100%; margin-top: 12px; padding-bottom: 8px; border-bottom: 1px solid currentColor; color: var(--accent); font-size: 13px; line-height: 1.6; font-weight: 650; }
.text-link:hover { color: var(--heading); }
.incident { margin: 26px 0; padding: 24px; border-left: 2px solid var(--accent); background: var(--panel); }
.incident h3, .delivery-record h3 { margin: 0 0 14px; color: var(--heading); font-size: 14px; line-height: 1.7; font-weight: 650; }
.incident p { font-size: 14px; }
.incident p:last-child { margin-bottom: 0; }
.boundary-list { margin: 28px 0 0; }
.boundary-list div { display: grid; grid-template-columns: 44px minmax(0,1fr); gap: 18px; padding: 17px 0; border-top: 1px solid var(--line); font-size: 14px; line-height: 1.85; }
.boundary-list dt { color: var(--accent); font-weight: 650; }
.boundary-list dd { margin: 0; color: var(--muted); }
.execution-order { display: grid; gap: 10px; margin: 24px 0; padding-left: 22px; color: var(--muted); font-size: 13px; line-height: 1.8; }
.execution-order li { padding-left: 6px; }
.execution-order li::marker { color: var(--accent); }
.delivery-record + .delivery-record { margin-top: 28px; padding-top: 28px; border-top: 1px solid var(--line); }
.delivery-record strong { color: var(--heading); font-weight: 650; }
.reading .verification-note { font-size: 12px; line-height: 1.9; }
.anchor-alias { position: absolute; top: 0; scroll-margin-top: 104px; }
.closing-section { padding-bottom: 96px; }
.page-footer { display: flex; justify-content: space-between; gap: 20px; margin: 0 4vw; padding: 28px 0 40px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
.page-footer a:hover { color: var(--accent); }

/* Full practice: the source remains readable without client-side rendering. */
.practice-layout { width: min(1240px,92vw); margin: 0 auto; padding: 138px 0 80px; display: grid; grid-template-columns: 220px minmax(0,1fr); gap: clamp(44px,7vw,104px); align-items: start; }
.practice-sidebar { position: sticky; top: 112px; max-height: calc(100dvh - 142px); overflow: auto; padding: 4px 8px 4px 2px; }
.practice-sidebar h2 { margin: 0 0 18px; font-size: 13px; color: var(--heading); }
.contents { display: grid; gap: 3px; }
.contents a { display: block; padding: 9px 12px; border-left: 2px solid transparent; color: var(--muted); font-size: 13px; line-height: 1.55; }
.contents a:hover, .contents a[aria-current] { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); }
.practice-article { max-width: 820px; min-width: 0; }
.practice-article > header { padding: 0 0 28px; border-bottom: 1px solid var(--line); }
.practice-article h1 { margin: 10px 0 20px; color: var(--heading); font-size: clamp(30px,3.2vw,44px); line-height: 1.35; letter-spacing: -.03em; }
.practice-article .article-meta { font-size: 12px; color: var(--muted); line-height: 1.8; }
.practice-article header > p:last-child { color: var(--muted); font-size: 15px; line-height: 1.9; }
.practice-section { padding-top: 28px; scroll-margin-top: 104px; }
.practice-section + .practice-section { margin-top: 30px; border-top: 1px solid var(--line); }
.practice-article h2 { margin: 14px 0 23px; color: var(--heading); font-size: clamp(24px,2.3vw,30px); line-height: 1.45; letter-spacing: -.02em; }
.practice-article h3 { margin: 32px 0 15px; color: var(--heading); font-size: 19px; line-height: 1.6; }
.practice-article p, .practice-article li { color: var(--text); font-size: 15px; line-height: 1.95; overflow-wrap: anywhere; }
.practice-article p { margin: 16px 0; }
.practice-article ul { padding-left: 24px; }
.practice-article li { padding-left: 4px; margin: 10px 0; }
.practice-article code { padding: 2px 5px; border-radius: 4px; background: var(--panel); font-size: .88em; font-family: var(--mono); overflow-wrap: anywhere; }
.practice-article pre { margin: 24px 0; padding: 22px; white-space: pre-wrap; border-radius: 12px; background: var(--panel); font-family: var(--sans); font-size: 14px; line-height: 1.9; overflow-wrap: anywhere; }
.practice-article pre code { padding: 0; font-family: inherit; font-size: inherit; }
.practice-article blockquote { margin: 24px 0; padding: 2px 20px; border-left: 2px solid var(--accent); background: var(--panel); }
.practice-article blockquote p { color: var(--muted); font-size: 13px; }
.table-scroll { width: 100%; overflow-x: auto; margin: 24px 0; border: 1px solid var(--line); border-radius: 12px; }
.practice-article table { width: 100%; border-collapse: collapse; min-width: 480px; text-align: left; font-size: 13px; line-height: 1.8; }
.practice-article th { padding: 12px 16px; background: var(--panel); color: var(--heading); font-weight: 650; }
.practice-article td { padding: 12px 16px; vertical-align: top; }
.practice-article tbody tr + tr { border-top: 1px solid var(--line); }
.practice-article td:first-child { min-width: 110px; }
.practice-article .closing { margin-top: 42px; padding-top: 24px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }

@media (prefers-color-scheme: dark) {
  :root { --bg: #10151e; --panel: #1b2330; --text: #e2e8f2; --heading: #f2f5fb; --muted: #a8b4c5; --line: #344154; --accent: #8abbff; --accent-soft: #1b304d; --header: rgba(16,21,30,.96); }
}
@media (max-width: 1100px) {
  .reading { grid-template-columns: minmax(0,1fr); gap: 30px; }
  .reading article { width: 100%; max-width: 680px; margin: 0 auto; }
  .reading > .visual, .reading > .opening-art { width: 100%; max-width: 760px; margin: 0 auto; }
  .reading h1, .reading h2 { font-size: 34px; }
  .progress { width: 420px; }
  .practice-layout { grid-template-columns: 180px minmax(0,1fr); gap: 36px; }
}
@media (max-width: 900px) {
  .site-header { top: 12px; left: 18px; right: 18px; height: 56px; padding: 0 13px; }
  .progress { top: 64px; left: 0; width: 100%; transform: none; background: var(--header); }
  .overview { padding-top: 126px; }
  .reading { width: min(720px,calc(100% - 48px)); min-height: auto; grid-template-columns: minmax(0,1fr); padding: 36px 0 60px; gap: 30px; scroll-margin-top: 134px; }
  .visual.hero { border-radius: 10px; }
  .anchor-alias { scroll-margin-top: 134px; }
  .reading article { width: 100%; max-width: 680px; margin: 0 auto; }
  .reading h1, .reading h2 { font-size: clamp(30px,5.6vw,42px); }
  .practice-layout { width: min(820px,calc(100% - 40px)); grid-template-columns: minmax(0,1fr); gap: 36px; padding-top: 104px; }
  .practice-sidebar { position: static; max-height: none; padding: 0; }
  .contents { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .practice-section { scroll-margin-top: 86px; }
  .practice-article h1 { font-size: 32px; }
}
@media (max-width: 520px) {
  .reading { width: calc(100% - 36px); padding: 42px 0; gap: 24px; }
  .progress a { padding: 7px 4px; font-size: 11px; }
  .incident { padding: 20px; }
  .meta div { grid-template-columns: 66px minmax(0,1fr); }
  .practice-layout { width: calc(100% - 36px); }
  .practice-article h1 { font-size: 29px; }
  .practice-article h2 { font-size: 24px; }
  .practice-article pre { padding: 18px; font-size: 13px; }
  .page-footer { margin: 0 18px; font-size: 12px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}
@media (prefers-reduced-transparency: reduce) {
  .site-header, .progress { background: var(--bg); backdrop-filter: none; }
}
@media print {
  :root { color-scheme: light; --bg: #fff; --panel: #f5f5f5; --text: #222; --heading: #111; --muted: #555; --line: #ccc; --accent: #174c88; --accent-soft: #eef3fa; }
  .site-header, .skip-link, .practice-sidebar, .page-footer { display: none; }
  .overview { padding: 0; }
  .reading { width: 100%; min-height: auto; break-inside: avoid; padding: 28px 0; }
  .practice-layout { display: block; width: 100%; padding: 0; }
  .practice-article { max-width: none; }
  .table-scroll { overflow: visible; }
  .practice-article table { min-width: 0; }
}