:root {
  --color-bg: #f2f0ea;
  --color-surface: #fffdf8;
  --color-ink: #1c2329;
  --color-ink-muted: #3d4a54;
  --color-border: #d6d0c6;
  --color-accent: #2e4a62;
  --color-accent-hover: #1f3346;
  --color-accent-soft: #e6eef3;
  /* Copper on #f2f0ea / #fffdf8 must stay ≥ 4.5:1 (WCAG AA, small labels). */
  --color-copper: #8a3f12;
  --color-copper-hover: #6e3412;
  --color-focus: #8a3f12;
  --color-fait: #2f5d45;
  --color-hyp: #8a5a12;
  --color-unk: #6b4a4a;
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, Cantarell, "Noto Sans", sans-serif;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2.5rem;
  --space-2xl: 4rem;
  --radius: 6px;
  --max-width: 42rem;
  --max-width-wide: 56rem;
  --shadow: 0 1px 3px rgba(28, 35, 41, 0.06);
}

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

html {
  color-scheme: light;
  scroll-behavior: smooth;
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--color-ink);
  background: var(--color-bg);
}

a {
  color: var(--color-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.15em;
}

a:hover {
  color: var(--color-accent-hover);
}

a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: var(--space-md);
  top: -4rem;
  z-index: 100;
  background: var(--color-accent);
  color: #fff;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius);
  text-decoration: none;
}

.skip-link:focus {
  top: var(--space-md);
  color: #fff;
}

.wrap {
  width: min(100% - 2rem, var(--max-width-wide));
  margin-inline: auto;
}

.wrap-narrow {
  width: min(100% - 2rem, var(--max-width));
  margin-inline: auto;
}

.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding: var(--space-md) 0;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 650;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  color: var(--color-ink);
  text-decoration: none;
}

.logo:hover {
  color: var(--color-accent);
}

.logo-mark {
  width: 1.75rem;
  height: 1.75rem;
  flex: none;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm) var(--space-lg);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav a {
  color: var(--color-ink-muted);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 500;
}

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

.hero {
  padding: var(--space-2xl) 0 var(--space-xl);
}

.hero h1,
.page-hero h1 {
  font-weight: 650;
  font-size: clamp(1.55rem, 4vw, 2.2rem);
  line-height: 1.25;
  letter-spacing: -0.025em;
  margin: 0 0 var(--space-md);
  max-width: 16em;
}

.page-hero {
  padding: var(--space-xl) 0 var(--space-md);
}

.page-hero h1 {
  max-width: 28ch;
}

.eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-copper);
  margin: 0 0 var(--space-sm);
}

.hero-uvp {
  font-size: 1.15rem;
  font-weight: 600;
  line-height: 1.4;
  margin: 0 0 var(--space-md);
  max-width: 40ch;
}

.hero-sub,
.lede {
  color: var(--color-ink-muted);
  margin: 0 0 var(--space-xl);
  max-width: 48ch;
}

.lede {
  margin-bottom: var(--space-lg);
  color: var(--color-ink);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.1rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  color: #fff;
}

.btn-secondary {
  background: transparent;
  color: var(--color-accent);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent-hover);
}

.section {
  padding: 0 0 var(--space-2xl);
}

.section-title {
  font-size: 1.35rem;
  font-weight: 650;
  letter-spacing: -0.02em;
  margin: 0 0 var(--space-sm);
}

.section-lead {
  color: var(--color-ink-muted);
  margin: 0 0 var(--space-lg);
  max-width: 52ch;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15.5rem, 1fr));
  gap: var(--space-md);
}

.card {
  display: block;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-lg);
  text-decoration: none;
  color: inherit;
  box-shadow: var(--shadow);
}

.card:hover {
  border-color: var(--color-accent);
  color: inherit;
}

.card h3 {
  margin: 0 0 var(--space-sm);
  font-size: 1.05rem;
  color: var(--color-accent);
}

.card p {
  margin: 0;
  color: var(--color-ink-muted);
  font-size: 0.95rem;
}

.principles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: var(--space-md);
}

.principle {
  background: var(--color-surface);
  border-top: 3px solid var(--color-accent);
  padding: var(--space-lg);
  border-radius: 0 0 var(--radius) var(--radius);
}

.principle h3 {
  margin: 0 0 var(--space-sm);
  font-size: 1rem;
}

.principle p {
  margin: 0;
  color: var(--color-ink-muted);
  font-size: 0.95rem;
}

.prose {
  padding-bottom: var(--space-2xl);
}

.prose h2 {
  font-size: 1.28rem;
  margin: 2rem 0 0.7rem;
  letter-spacing: -0.02em;
}

.prose h3 {
  font-size: 1.08rem;
  margin: 1.6rem 0 0.5rem;
}

.prose p,
.prose li {
  overflow-wrap: break-word;
}

.prose ul,
.prose ol {
  padding-left: 1.2rem;
}

.prose li + li {
  margin-top: 0.35rem;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  margin: 1rem 0 1.5rem;
  background: var(--color-surface);
}

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

.prose th {
  background: var(--color-accent-soft);
  font-weight: 650;
}

.prose blockquote {
  margin: 1.2rem 0;
  padding: 0.2rem 0 0.2rem 1rem;
  border-left: 3px solid var(--color-copper);
  color: var(--color-ink-muted);
}

.meta-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.7rem;
  margin: 0 0 var(--space-lg);
  font-size: 0.82rem;
  color: var(--color-ink-muted);
}

.crumb {
  font-size: 0.85rem;
  color: var(--color-ink-muted);
  margin: 0 0 var(--space-md);
}

.crumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.crumb li:not(:last-child)::after {
  content: "/";
  margin-left: 0.35rem;
  color: var(--color-border);
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  margin: 0 0 var(--space-xl);
  background: var(--color-surface);
}

.spec-table th {
  width: 11rem;
  background: var(--color-accent-soft);
  text-align: left;
  font-weight: 600;
}

.spec-table th,
.spec-table td {
  border: 1px solid var(--color-border);
  padding: 0.5rem 0.7rem;
  vertical-align: top;
}

.tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.12rem 0.4rem;
  border-radius: 3px;
  background: #eceae3;
  color: var(--color-ink-muted);
}

.tag-fait {
  background: #e4f0e8;
  color: var(--color-fait);
}

.tag-hyp {
  background: #f6ecd8;
  color: var(--color-hyp);
}

.tag-unk,
.tag-secondary {
  background: #f1e7e7;
  color: var(--color-unk);
}

.notice {
  background: var(--color-accent-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-md) var(--space-lg);
  margin: 0 0 var(--space-lg);
}

.notice strong {
  color: var(--color-accent);
}

.check-item {
  list-style: none;
  margin-left: 0;
  min-width: 0;
}

.check-item label {
  display: flex;
  gap: 0.55rem;
  align-items: flex-start;
  min-width: 0;
}

.check-item label span {
  min-width: 0;
  overflow-wrap: break-word;
}

.check-item input {
  flex: 0 0 auto;
}

.check-item input {
  margin-top: 0.35rem;
  accent-color: var(--color-accent);
}

.related {
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
}

.site-footer {
  background: var(--color-ink);
  color: #d6d0c6;
  padding: var(--space-xl) 0;
  margin-top: auto;
}

.site-footer a {
  color: #f2f0ea;
}

.site-footer a:hover {
  color: #fff;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: var(--space-lg);
}

.footer-brand {
  font-weight: 650;
  color: #fff;
  margin: 0 0 0.4rem;
}

.footer-nav {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-nav li + li {
  margin-top: 0.35rem;
}

.footer-note {
  margin: var(--space-xl) 0 0;
  font-size: 0.85rem;
  color: #9aa3ab;
  max-width: 52ch;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.notice-banner {
  background: #f6ecd8;
  border: 1px solid #e2d0a8;
  color: #5c4310;
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  margin: 0 0 var(--space-lg);
}

@media (max-width: 720px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .hero h1,
  .page-hero h1 {
    max-width: none;
  }

  .prose table,
  .spec-table {
    display: block;
    overflow-x: auto;
  }
}

.prose ul:has(> .check-item) {
  padding-left: 0;
}

@media (max-width: 480px) {
  .prose, main {
    overflow-wrap: break-word;
  }
  table {
    display: block;
    max-width: 100%;
    overflow-x: auto;
  }
}