/* —— bold chrome — mirrors index-bold.html (keep in sync) —— */
  body { background: var(--bg); }
  #main { scroll-margin-top: 5rem; }
  .rd-nav { position: sticky; top: 0; z-index: 50; border-bottom: 1px solid transparent;
    transition: background .2s ease, box-shadow .2s ease, border-color .2s ease; }
  .rd-nav.is-scrolled { background: color-mix(in srgb, var(--bg) 85%, transparent);
    -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px);
    border-bottom-color: var(--border); box-shadow: 0 6px 24px -16px rgba(70,35,12,.5); }
  .rd-nav__in { display: flex; align-items: center; gap: 1.4rem; padding: .85rem 0; }
  .rd-nav__brand { display: flex; align-items: center; gap: .55rem; text-decoration: none; }
  .rd-nav__mark { width: 34px; height: 32px; background: var(--brand); flex: none;
    -webkit-mask: url(wordmark.svg) center/contain no-repeat; mask: url(wordmark.svg) center/contain no-repeat; }
  .rd-nav__name { font-family: var(--font-display); font-weight: 800; font-size: 1.18rem; letter-spacing: -.01em; color: var(--text); }
  .rd-nav__sp { flex: 1; }
  .rd-nav__links { display: flex; align-items: center; gap: 1.7rem; }
  .rd-nav__links a:not(.btn) { font-family: var(--font-display); font-weight: 700; font-size: 1rem; color: var(--text); text-decoration: none; }
  .rd-nav__links a:not(.btn):hover { color: var(--brand-text); }
  .rd-foot { background: var(--surface-2); border-top: 1px solid var(--border);
    padding-block: clamp(2.5rem, 5vw, 3.6rem); margin-top: clamp(3rem, 7vw, 5.5rem); }
  .rd-foot__grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 2rem; align-items: start; }
  .rd-foot__tag { font-family: var(--font-display); font-weight: 800; font-size: 1.6rem; letter-spacing: -.01em; margin: 1rem 0 0; }
  .rd-foot__tag span { color: var(--brand); }
  .rd-foot__links { display: flex; flex-wrap: wrap; gap: .65rem 1.5rem; justify-content: flex-end; }
  .rd-foot__links a { font-family: var(--font-display); font-weight: 700; font-size: .98rem; color: var(--text-muted); text-decoration: none; }
  .rd-foot__links a:hover { color: var(--brand-text); }
  .rd-foot__bottom { display: flex; justify-content: space-between; flex-wrap: wrap; gap: .5rem;
    margin-top: 2.2rem; padding-top: 1.3rem; border-top: 1px solid var(--border);
    font-family: var(--font-body); font-size: .85rem; color: var(--text-faint); }
  @media (max-width: 48rem) {
    .rd-nav__links a:not(.btn) { display: none; }
    .rd-foot__grid { grid-template-columns: 1fr; }
    .rd-foot__links { justify-content: flex-start; }
  }