:root {
  --ink: #16211f;
  --ink-soft: #53605d;
  --paper: #f4f1e8;
  --paper-deep: #ebe4d5;
  --card: #fffdf7;
  --line: #d4ccbc;
  --accent: #0b695e;
  --accent-bright: #d7f06b;
  --warning: #7b3e12;
  --max: 1180px;
  --shadow: 0 18px 50px rgba(22, 33, 31, 0.10);
}

* { box-sizing: border-box; }

html {
  color: var(--ink);
  background: var(--paper);
  font-family: "Yu Gothic UI", "Hiragino Kaku Gothic ProN", "Noto Sans JP", system-ui, sans-serif;
  line-height: 1.75;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 12% 8%, rgba(215, 240, 107, 0.26), transparent 25rem),
    linear-gradient(180deg, #f8f5ed 0%, var(--paper) 45%, #efeadd 100%);
}

a { color: var(--accent); text-decoration-thickness: 0.08em; text-underline-offset: 0.18em; }
a:hover { text-decoration-thickness: 0.16em; }
h1, h2, h3, p, li, a { overflow-wrap: anywhere; }
a:focus-visible, button:focus-visible, [tabindex]:focus-visible {
  outline: 3px solid #ad4f00;
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  left: 1rem;
  top: -5rem;
  z-index: 100;
  padding: 0.75rem 1rem;
  color: white;
  background: var(--ink);
}
.skip-link:focus { top: 1rem; }

.site-header {
  border-bottom: 1px solid rgba(22, 33, 31, 0.14);
  background: rgba(248, 245, 237, 0.92);
  backdrop-filter: blur(12px);
}
.header-inner {
  width: min(var(--max), calc(100% - 2rem));
  min-height: 72px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--ink);
  font-weight: 750;
  letter-spacing: 0.02em;
  text-decoration: none;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  color: var(--accent-bright);
  background: var(--accent);
  font-family: Georgia, serif;
}
.status-chip {
  border: 1px solid #b96d2e;
  border-radius: 999px;
  padding: 0.28rem 0.68rem;
  color: var(--warning);
  background: #fff4e9;
  font-size: 0.78rem;
  font-weight: 750;
  white-space: nowrap;
}

main, .site-footer {
  width: min(var(--max), calc(100% - 2rem));
  margin-inline: auto;
}

.hero {
  min-height: 560px;
  padding: clamp(4.5rem, 10vw, 8rem) 0 5rem;
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(260px, 0.55fr);
  align-items: end;
  gap: clamp(2rem, 7vw, 6rem);
}
.hero-copy, .hero-note, .section-heading, .article-card { min-width: 0; }
.eyebrow, .note-label, .rail-label {
  margin: 0 0 0.8rem;
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.hero h1 {
  max-width: 850px;
  margin: 0;
  font-family: Georgia, "Yu Mincho", serif;
  font-size: clamp(3rem, 8vw, 7.2rem);
  font-weight: 500;
  letter-spacing: -0.055em;
  line-height: 0.98;
}
.hero h1 span { color: var(--accent); }
.lead {
  max-width: 720px;
  margin: 2rem 0 0;
  color: var(--ink-soft);
  font-size: clamp(1rem, 2vw, 1.25rem);
}
.hero-note {
  padding: 1.5rem;
  border-top: 4px solid var(--accent);
  background: rgba(255, 253, 247, 0.72);
  box-shadow: var(--shadow);
}
.hero-note ul { margin: 0; padding-left: 1.25rem; }
.hero-note li + li { margin-top: 0.45rem; }

.articles-section { padding: 5rem 0 7rem; border-top: 1px solid var(--line); }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 2rem; margin-bottom: 2rem; }
.section-heading h2, .boundary-panel h2 {
  margin: 0;
  font-family: Georgia, "Yu Mincho", serif;
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 500;
}
.article-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.25rem; }
.article-card {
  min-height: 330px;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  background: var(--card);
  box-shadow: 0 1px 0 rgba(22, 33, 31, 0.06);
}
.article-card:nth-child(2) { background: var(--ink); color: #edf3ef; }
.article-card:nth-child(2) .eyebrow, .article-card:nth-child(2) a { color: var(--accent-bright); }
.article-card h2 { margin: 0; font-size: clamp(1.35rem, 2.4vw, 2.1rem); line-height: 1.4; }
.article-card h2 a { color: inherit; text-decoration: none; }
.article-card p:not(.eyebrow) { color: var(--ink-soft); }
.article-card:nth-child(2) p:not(.eyebrow) { color: #cbd5d1; }
.text-link { margin-top: auto; font-weight: 800; }

.boundary-panel {
  margin-bottom: 7rem;
  padding: clamp(2rem, 5vw, 4rem);
  border: 1px solid var(--line);
  background: var(--paper-deep);
}
.boundary-panel p:last-child { max-width: 820px; margin-bottom: 0; }

.article-shell { padding: 2rem 0 7rem; }
.breadcrumbs { display: flex; gap: 0.6rem; color: var(--ink-soft); font-size: 0.86rem; }
.article-header { max-width: 1120px; padding: clamp(3rem, 8vw, 7rem) 0 4rem; }
.article-header h1 {
  margin: 0;
  font-family: Georgia, "Yu Mincho", serif;
  font-size: clamp(2.4rem, 5.5vw, 5rem);
  font-weight: 500;
  letter-spacing: -0.04em;
  line-height: 1.14;
}
.article-deck { max-width: 760px; margin: 1.5rem 0 0; color: var(--ink-soft); font-size: 1.15rem; }
.article-layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 760px);
  justify-content: space-between;
  gap: clamp(2rem, 8vw, 7rem);
  padding-top: 3rem;
  border-top: 1px solid var(--line);
}
.article-rail { color: var(--ink-soft); font-size: 0.87rem; }
.article-rail p { margin-top: 0; }
.article-rail .rail-label { margin-top: 1.5rem; margin-bottom: 0.2rem; }
.article-rail .rail-label:first-child { margin-top: 0; }

.prose { min-width: 0; font-size: 1.02rem; }
.prose h2 { margin: 4rem 0 1.2rem; font-size: clamp(1.75rem, 3vw, 2.5rem); line-height: 1.35; }
.prose h3 { margin: 2.8rem 0 0.8rem; font-size: 1.3rem; }
.prose p { margin: 1.1rem 0; }
.prose ul { padding-left: 1.4rem; }
.prose li + li { margin-top: 0.45rem; }
.prose blockquote {
  margin: 1.8rem 0;
  padding: 1rem 1.3rem;
  border-left: 4px solid var(--accent);
  background: rgba(255, 253, 247, 0.7);
  color: var(--ink-soft);
}
.prose blockquote p { margin: 0; }
.prose code {
  padding: 0.1em 0.35em;
  border-radius: 0.25rem;
  background: #e5e0d5;
  font-family: Consolas, monospace;
  font-size: 0.92em;
}
.check-list { list-style: none; padding-left: 0 !important; }
.check-item { display: flex; align-items: flex-start; gap: 0.45rem; }
.check-item input { margin-top: 0.42rem; accent-color: var(--accent); }

.table-scroll { overflow-x: auto; margin: 1.8rem 0; border: 1px solid var(--line); background: var(--card); }
table { width: 100%; border-collapse: collapse; min-width: 620px; font-size: 0.92rem; }
th, td { padding: 0.9rem 1rem; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); }
th { background: var(--paper-deep); }
tr:last-child td { border-bottom: 0; }

.site-footer {
  padding: 2.5rem 0 4rem;
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 0.86rem;
}
.site-footer p { margin: 0; }
.revision { font-family: Consolas, monospace; }

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(0.8rem, 2.5vw, 1.6rem);
  font-size: 0.88rem;
  font-weight: 750;
}
.site-nav a { color: var(--ink); text-decoration: none; }
.site-nav a:hover, .site-nav a:focus-visible { text-decoration: underline; text-underline-offset: 0.25em; }

.interest-panel {
  margin: 0 0 7rem;
  padding: clamp(2rem, 5vw, 4rem);
  border: 1px solid var(--ink);
  background: var(--ink);
  color: #edf3ef;
}
.article-shell > .interest-panel { margin-top: 5rem; }
.interest-panel h2 { max-width: 850px; margin: 0 0 1rem; font-size: clamp(1.7rem, 3.4vw, 2.8rem); }
.interest-panel p:not(.eyebrow) { max-width: 760px; color: #cbd5d1; }
.interest-panel .eyebrow { color: var(--accent-bright); }
.button-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  margin-top: 0.8rem;
  padding: 0.75rem 1.2rem;
  border: 1px solid var(--ink);
  background: var(--accent-bright);
  color: var(--ink) !important;
  font-weight: 850;
  text-decoration: none;
}
.button-link:hover, .button-link:focus-visible { background: #efffa5; transform: translateY(-1px); }

.simple-page {
  max-width: 820px;
  min-height: 58vh;
  padding: clamp(4rem, 10vw, 8rem) 0 7rem;
}
.simple-page h1 {
  margin: 0 0 2rem;
  font-family: Georgia, "Yu Mincho", serif;
  font-size: clamp(2.5rem, 6vw, 4.8rem);
  font-weight: 500;
  line-height: 1.14;
}
.simple-page h2 { margin-top: 3rem; font-size: clamp(1.5rem, 3vw, 2.2rem); }
.simple-page .lead { font-size: clamp(1.1rem, 2vw, 1.35rem); line-height: 1.8; }
.fine-print { color: var(--ink-soft); font-size: 0.9rem; }

@media (max-width: 780px) {
  .header-inner { align-items: flex-start; padding-block: 1rem; flex-direction: column; }
  .site-nav { width: 100%; flex-wrap: wrap; }
  .hero { min-height: auto; grid-template-columns: 1fr; padding-top: 5rem; }
  .hero h1 { font-size: clamp(2.7rem, 12vw, 4rem); }
  .section-heading { align-items: flex-start; flex-direction: column; }
  .article-grid { grid-template-columns: 1fr; }
  .article-layout { grid-template-columns: 1fr; }
  .article-rail { padding: 1rem; border: 1px solid var(--line); background: rgba(255, 253, 247, 0.65); }
  .site-footer { flex-direction: column; }
}

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

@media print {
  .status-chip, .skip-link, .breadcrumbs { display: none; }
  body { background: white; }
  .site-header { background: white; }
  .article-layout { grid-template-columns: 1fr; }
  .article-rail { border-bottom: 1px solid #888; padding-bottom: 1rem; }
}