:root {
  --paper: #fffdf8;
  --paper-muted: #f4efe4;
  --ink: #191919;
  --ink-muted: #4a4845;
  --rule: #76736d;
  --red: #d83126;
  --focus-ring: #191919;
  --font-mono: ui-monospace, "SF Mono", "Roboto Mono", Menlo, Consolas, monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html {
  scroll-behavior: smooth;
  scroll-padding-top: 2rem;
  background-color: var(--paper);
}
body {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--ink);
  background-color: var(--paper);
  -webkit-font-smoothing: antialiased;
}

/* Accessibility */
.skip-link {
  position: absolute;
  top: -3rem;
  left: 1rem;
  background: var(--ink);
  color: var(--paper);
  padding: 0.5rem 1rem;
  font-weight: 600;
  z-index: 100;
  text-decoration: none;
  transition: top 0.2s ease;
}
.skip-link:focus { top: 1rem; outline: 3px solid var(--red); outline-offset: 2px; }
:focus-visible { outline: 3px solid var(--focus-ring); outline-offset: 3px; }

/* Status Banner */
.preview-banner {
  background-color: var(--paper-muted);
  border-bottom: 2px solid var(--red);
  padding: 0.75rem 1.25rem;
  text-align: center;
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink);
}

/* Container & Header */
.site-wrapper {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 clamp(1rem, 3vw, 2rem);
}
header.site-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--ink);
}
.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--ink);
  text-decoration: none;
  font-size: 1.25rem;
  font-weight: 700;
}
.brand-link:hover { color: var(--red); }
.brand-mark { display: block; flex-shrink: 0; }
.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 4px;
  font-size: 0.9375rem;
}
.nav-links a:hover { color: var(--red); }

/* Hero */
.hero {
  padding: clamp(2rem, 4vw, 3rem) 0 2.5rem;
  border-bottom: 1px solid var(--rule);
}
.eyebrow {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--red);
  margin-bottom: 0.75rem;
}
h1.hero-title {
  font-family: var(--font-sans);
  font-size: clamp(2rem, 5vw + 1rem, 3.5rem);
  line-height: 1.1;
  font-weight: 900;
  margin: 0 0 1rem;
  color: var(--ink);
}
.hero-subtitle {
  font-size: clamp(1rem, 1.5vw + 0.75rem, 1.25rem);
  color: var(--ink-muted);
  max-width: 680px;
  margin: 0 0 1.5rem;
}
.commit-badge {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--paper-muted);
  border: 1px solid var(--rule);
  padding: 0.375rem 0.75rem;
  font-size: 0.8125rem;
}
.commit-badge code { font-weight: 700; color: var(--red); }

/* Sections & Grid */
section {
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--rule);
}
h2.section-heading {
  font-family: var(--font-sans);
  font-size: clamp(1.375rem, 3vw + 0.5rem, 2rem);
  font-weight: 800;
  margin: 0 0 1.5rem;
}
.spec-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}
.spec-card {
  background-color: var(--paper-muted);
  border: 1px solid var(--rule);
  padding: 1.25rem;
}
.spec-card h3 { font-size: 1.125rem; margin: 0 0 0.5rem; color: var(--ink); }
.spec-card p { margin: 0; font-size: 0.9375rem; color: var(--ink-muted); }

/* Fixture & Transparency Box */
.fixture-box {
  background-color: var(--paper);
  border: 2px solid var(--ink);
  padding: clamp(1rem, 3vw, 1.5rem);
  margin-top: 1.5rem;
}
.fixture-box h3 { margin: 0 0 0.75rem; font-size: 1.125rem; }
.fixture-list { list-style: none; padding: 0; margin: 0 0 1rem; }
.fixture-list li {
  padding: 0.375rem 0;
  border-bottom: 1px dashed var(--rule);
  font-size: 0.9375rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem;
}
.fixture-list li:last-child { border-bottom: none; }
.fixture-key { color: var(--ink-muted); }
.fixture-val { font-weight: 700; color: var(--ink); }
.fixture-note { margin: 0.5rem 0 0; font-size: 0.875rem; color: var(--ink-muted); }
kbd {
  background: var(--paper-muted);
  border: 1px solid var(--rule);
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
  font-size: 0.85em;
}

.transparency-callout {
  border-left: 4px solid var(--red);
  background-color: var(--paper-muted);
  padding: 1.25rem;
  margin-top: 1.5rem;
}
.transparency-callout h3 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--red);
}
.transparency-callout p { margin: 0; font-size: 0.9375rem; color: var(--ink); }

/* Footer */
footer.site-footer {
  padding: 2.5rem 0 3.5rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  font-size: 0.875rem;
  color: var(--ink-muted);
}
.footer-meta { display: flex; flex-direction: column; gap: 0.25rem; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 1rem; }
.footer-nav a { color: var(--ink); text-decoration: underline; text-underline-offset: 3px; }
.footer-nav a:hover { color: var(--red); }

@media (max-width: 380px) {
  header.site-header { flex-direction: column; align-items: flex-start; }
  .nav-links { gap: 0.75rem 1rem; }
}