:root {
  color-scheme: light;

  --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --color-bg: #ffffff;
  --color-bg-alt: #f4f6f7;
  --color-ink: #12181b;
  --color-ink-muted: #4c5a60;
  --color-border: #d9e0e2;
  --color-accent: #b35c00;
  --color-accent-ink: #ffffff;
  --color-safety: #0f5c4a;
  --color-danger: #9c1f1f;
  --color-focus: #0b63b6;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;

  --radius-sm: 2px;
  --radius-md: 4px;

  --max-content-width: 1120px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-ink);
  background: var(--color-bg);
  line-height: 1.55;
  font-size: 16px;
}

img,
svg {
  max-width: 100%;
  display: block;
}

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

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

.skip-link {
  position: absolute;
  left: 0;
  top: -48px;
  background: var(--color-ink);
  color: #fff;
  padding: var(--space-2) var(--space-4);
  z-index: 100;
  transition: top 0.15s ease;
}

.skip-link:focus {
  top: 0;
}

.site-header {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-ink);
  color: #fff;
}

.site-header__inner {
  max-width: var(--max-content-width);
  margin: 0 auto;
  padding: var(--space-3) var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.brand {
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: 0.01em;
}

.brand span {
  color: var(--color-accent);
}

.main-nav {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.main-nav a {
  color: #d9e0e2;
  text-decoration: none;
  font-size: 0.9375rem;
  padding: var(--space-2) 0;
  border-bottom: 2px solid transparent;
}

.main-nav a:hover,
.main-nav a[aria-current='page'] {
  color: #fff;
  border-bottom-color: var(--color-accent);
}

main {
  max-width: var(--max-content-width);
  margin: 0 auto;
  padding: var(--space-6) var(--space-4) var(--space-9);
}

.hero {
  padding: var(--space-8) 0 var(--space-7);
  border-bottom: 1px solid var(--color-border);
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.12;
  margin: 0 0 var(--space-4);
  max-width: 22ch;
}

.hero p {
  font-size: 1.125rem;
  color: var(--color-ink-muted);
  max-width: 60ch;
  margin: 0 0 var(--space-5);
}

.button {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  background: var(--color-accent);
  color: var(--color-accent-ink);
  text-decoration: none;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 2px solid var(--color-accent);
  min-height: 44px;
}

.button:hover {
  background: #954a00;
  border-color: #954a00;
}

.button--secondary {
  background: transparent;
  color: var(--color-ink);
  border-color: var(--color-ink);
}

.button--secondary:hover {
  background: var(--color-ink);
  color: #fff;
}

.button-row {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.section {
  padding: var(--space-7) 0;
  border-bottom: 1px solid var(--color-border);
}

.section h2 {
  font-size: 1.75rem;
  margin: 0 0 var(--space-2);
}

.section__lede {
  color: var(--color-ink-muted);
  max-width: 65ch;
  margin: 0 0 var(--space-5);
}

.card-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  background: var(--color-bg-alt);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.card h3 {
  margin: 0;
  font-size: 1.125rem;
}

.card p {
  margin: 0;
  color: var(--color-ink-muted);
  font-size: 0.9375rem;
}

.card__status {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-safety);
}

.notice {
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  background: var(--color-bg-alt);
  padding: var(--space-4);
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  color: var(--color-ink-muted);
}

.eyebrow {
  display: inline-block;
  margin-bottom: var(--space-3);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.section-heading {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: var(--space-4);
  align-items: start;
  margin-bottom: var(--space-5);
}

.section-heading h2,
.callout-band h2 {
  margin-top: 0;
}

.section-number {
  border-top: 3px solid var(--color-accent);
  padding-top: var(--space-2);
  color: var(--color-ink-muted);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.timeline__item,
.split-panel article {
  border: 1px solid var(--color-border);
  padding: var(--space-5);
  background: var(--color-bg-alt);
}

.timeline__item--accent {
  border-top: 4px solid var(--color-accent);
}

.timeline__item h3,
.split-panel h3,
.prose-grid h3,
.priority-stack h3,
.process-list h3 {
  margin: 0 0 var(--space-2);
}

.timeline__item p,
.split-panel p,
.prose-grid p,
.priority-stack p,
.process-list p {
  margin: 0;
  color: var(--color-ink-muted);
}

.timeline__date {
  margin-bottom: var(--space-2) !important;
  color: #954a00 !important;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
}

.source-ref {
  color: #954a00;
  font-size: 0.75em;
  font-weight: 700;
  vertical-align: super;
  text-decoration: none;
}

.prose-grid,
.split-panel {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-4);
}

.prose-grid > div {
  border-top: 3px solid var(--color-ink);
  padding-top: var(--space-4);
}

.body-copy {
  max-width: 72ch;
  margin: var(--space-6) 0 0;
}

.process-list,
.priority-stack,
.check-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.process-list li,
.priority-stack article {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: var(--space-4);
  padding: var(--space-4) 0;
  border-top: 1px solid var(--color-border);
}

.process-list li > span,
.priority-stack strong {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  background: var(--color-ink);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

.priority-stack article:first-child strong {
  background: var(--color-accent);
}

.check-list {
  display: grid;
  gap: var(--space-3);
}

.check-list li {
  position: relative;
  padding: var(--space-3) var(--space-3) var(--space-3) 44px;
  border: 1px solid var(--color-border);
  background: var(--color-bg-alt);
}

.check-list li::before {
  content: '✓';
  position: absolute;
  left: var(--space-4);
  color: var(--color-safety);
  font-weight: 800;
}

.callout-band {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-6);
  background: var(--color-ink);
  color: #fff;
  padding: var(--space-6);
  margin: var(--space-7) 0;
}

.callout-band p {
  color: #d9e0e2;
  margin: 0;
}

.callout-band .eyebrow {
  color: #ffb86b;
}

.sources ol {
  padding-left: 1.25rem;
}

.sources li + li {
  margin-top: var(--space-2);
}

.sources__date {
  color: var(--color-ink-muted);
  font-size: 0.875rem;
}

.site-footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-alt);
}

.site-footer__inner {
  max-width: var(--max-content-width);
  margin: 0 auto;
  padding: var(--space-6) var(--space-4);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  justify-content: space-between;
  font-size: 0.875rem;
  color: var(--color-ink-muted);
}

.site-footer a {
  color: var(--color-ink-muted);
}

@media (max-width: 680px) {
  .timeline {
    grid-template-columns: 1fr;
  }

  .section-heading {
    grid-template-columns: 36px minmax(0, 1fr);
  }

  .callout-band {
    align-items: flex-start;
    flex-direction: column;
    padding: var(--space-5);
  }
}

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

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