/* =========================================================================
   dm-nav.css — DataMural public-site navigation bar + sub-nav band
   Self-contained: included via the dm_nav partial so any page that renders
   the partial automatically gets styled nav, regardless of whether the page
   also loads home-2026.css.

   Tokens are defined on :root so they resolve even when .home-2026 is absent
   (standalone pages such as the rule library hub and category pages).
   home-2026.css re-declares the same tokens on .home-2026 — that higher-
   specificity declaration wins inside the homepage wrapper, which is fine
   because the values are identical.
   ========================================================================= */

/* ── Tokens (nav subset) ────────────────────────────────────────────────── */
:root {
  --dm-navy:    #0F1B2D;
  --dm-gold:    #B8902A;
  --dm-gold-lt: #E1C56D;
  --dm-ivory:   #FAF8F2;
  --dm-line:    rgba(15,27,45,.14);
}

/* ── Main nav bar ───────────────────────────────────────────────────────── */
.dm-nav {
  background: var(--dm-navy);
  color: var(--dm-ivory);
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 48px;
  position: relative; z-index: 10;
  flex-wrap: wrap; gap: 12px;
}
.dm-nav .dm-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--dm-ivory);
  text-decoration: none;
  flex: 0 0 auto;
}
.dm-nav .dm-brand-logo {
  display: block;
  width: 164px;
  height: 93px;
  object-fit: contain;
  flex: 0 0 auto;
}
.dm-nav .dm-brand-tagline {
  display: block;
  color: rgba(250,248,242,.78);
  font-size: 8px;
  line-height: 1.2;
  letter-spacing: .09em;
  text-transform: uppercase;
  white-space: nowrap;
}
.dm-nav nav {
  display: flex; align-items: center; gap: clamp(14px, 1.8vw, 28px);
}
.dm-nav nav a {
  font-size: 12px; text-transform: uppercase; letter-spacing: .12em;
  color: rgba(250,248,242,.7);
  transition: color .15s;
}
.dm-nav nav a:hover { color: var(--dm-ivory); }
.dm-nav nav a[aria-current="page"] { color: var(--dm-gold-lt); }
.dm-nav a:focus-visible, .dm-subnav a:focus-visible { outline: 2px solid var(--dm-gold-lt); outline-offset: 4px; }
.dm-nav .dm-nav-cta {
  font-size: 12px; text-transform: uppercase; letter-spacing: .1em;
  border: 1px solid var(--dm-gold);
  color: var(--dm-gold-lt);
  padding: 8px 16px;
  transition: background .15s, color .15s;
}
.dm-nav .dm-nav-cta:hover {
  background: var(--dm-gold);
  color: var(--dm-navy);
}
.dm-mobile-menu { display: none; position: relative; }
.dm-mobile-menu summary {
  cursor: pointer;
  list-style: none;
  border: 1px solid rgba(250,248,242,.5);
  color: var(--dm-ivory);
  padding: 8px 12px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .12em;
}
.dm-mobile-menu summary::-webkit-details-marker { display: none; }
.dm-mobile-menu summary::after { content: " +"; color: var(--dm-gold-lt); }
.dm-mobile-menu[open] summary::after { content: " −"; }
.dm-mobile-menu nav {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 220px;
  display: grid;
  gap: 0;
  background: var(--dm-navy);
  border: 1px solid rgba(250,248,242,.28);
  box-shadow: 0 12px 32px rgba(0,0,0,.24);
}
.dm-mobile-menu nav a {
  padding: 12px 16px;
  border-top: 1px solid rgba(250,248,242,.12);
}
.dm-mobile-menu nav a:first-child { border-top: 0; }

/* ── Sub-navigation band (section quick-jumps under the main nav) ────────── */
.dm-subnav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  background: var(--dm-ivory);
  border-bottom: 1px solid var(--dm-line);
  padding: 12px 24px;
}
.dm-subnav a {
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--dm-navy);
  text-decoration: none;
  transition: color .15s;
}
.dm-subnav a:hover { color: var(--dm-gold); }
.dm-subnav-sep {
  width: 1px;
  height: 14px;
  background: var(--dm-line);
}

/* ── Responsive ─────────────────────────────────────────────────────────── */
@media (max-width: 960px) {
  .dm-nav { padding: 14px 24px; }
  .dm-nav .dm-brand-logo { width: 132px; height: 75px; }
  .dm-nav .dm-brand-tagline { font-size: 7px; }
  .dm-nav > nav { display: none; }
  .dm-mobile-menu { display: block; margin-left: auto; }
}
@media (max-width: 640px) {
  .dm-nav .dm-brand-logo { width: 116px; height: 66px; }
  .dm-nav .dm-brand-tagline { font-size: 6px; letter-spacing: .06em; }
  .dm-nav > .dm-nav-cta { display: none; }
  .dm-subnav { gap: 16px; padding: 10px 12px; }
  .dm-subnav a { font-size: 12px; letter-spacing: .12em; }
}