/* ════════════════════════════════════════
   NAV — logo lock-up, dropdown, mobile drawer
════════════════════════════════════════ */
.skip-link {
  position: absolute; left: 1rem; top: -60px; z-index: 2000;
  background: var(--red); color: var(--white); padding: 10px 18px;
  border-radius: 4px; font-size: 13px; font-weight: 600;
  transition: top 0.2s;
}
.skip-link:focus { top: 0.75rem; }

.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 999;
  height: 72px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 1.25rem;
  padding: 0 clamp(1rem, 3.2vw, 3.5rem);
  background: rgba(8, 15, 58, 0.92);
  backdrop-filter: blur(16px) saturate(1.4);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  transition: background 0.4s, box-shadow 0.4s;
}
.nav.is-scrolled { background: rgba(5,10,38,0.98); box-shadow: 0 2px 40px rgba(0,0,0,0.4); }

.nav-brand { display: flex; align-items: center; flex-shrink: 0; }
.nav-logo { height: 50px; width: auto; display: block; }

.nav-links {
  display: flex; align-items: center; gap: clamp(1rem, 1.9vw, 2rem);
  list-style: none; margin-left: auto;
}
.nav-links > li { position: relative; }
.nav-links a, .nav-links button.nav-drop-btn {
  font-family: inherit;
  font-size: 13px; font-weight: 500; letter-spacing: 0.02em;
  color: rgba(255,255,255,0.75); transition: color 0.2s;
  position: relative; padding: 6px 0; white-space: nowrap;
  background: none; border: 0; cursor: pointer;
  display: inline-flex; align-items: center; gap: 5px;
}
.nav-links > li > a::after, .nav-links > li > button::after {
  content: ''; position: absolute;
  bottom: 0; left: 0; width: 0; height: 1.5px;
  background: var(--red); transition: width 0.25s var(--ease);
}
.nav-links > li > a:hover, .nav-links > li > button:hover,
.nav-links > li > a.is-active, .nav-links > li > button.is-active { color: var(--white); }
.nav-links > li > a:hover::after, .nav-links > li > button:hover::after,
.nav-links > li > a.is-active::after, .nav-links > li > button.is-active::after { width: 100%; }
.nav-caret { width: 9px; height: 9px; transition: transform 0.25s; }
.has-sub.open .nav-caret, .has-sub:hover .nav-caret { transform: rotate(180deg); }

.nav-sub {
  position: absolute; top: calc(100% + 14px); left: -1rem;
  min-width: 230px; list-style: none;
  background: rgba(8,15,58,0.98);
  border: 1px solid rgba(255,255,255,0.1); border-radius: 10px;
  padding: 0.5rem; box-shadow: 0 24px 60px rgba(0,0,0,0.45);
  opacity: 0; visibility: hidden; transform: translateY(8px);
  transition: opacity 0.2s, transform 0.2s, visibility 0.2s;
}
.nav-sub::before { content: ''; position: absolute; top: -16px; left: 0; right: 0; height: 16px; }
.has-sub:hover .nav-sub, .has-sub:focus-within .nav-sub, .has-sub.open .nav-sub {
  opacity: 1; visibility: visible; transform: none;
}
.nav-sub a {
  display: block; padding: 10px 14px; border-radius: 6px;
  font-size: 13px; color: rgba(255,255,255,0.75);
}
.nav-sub a:hover, .nav-sub a.is-active { background: rgba(255,255,255,0.08); color: var(--white); }

.nav-cta {
  background: var(--red); color: var(--white);
  font-size: 12.5px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase;
  padding: 10px 24px; border-radius: 4px; white-space: nowrap; flex-shrink: 0;
  transition: background 0.2s, transform 0.15s;
}
.nav-cta:hover { background: var(--red-light); transform: translateY(-1px); }

.nav-toggle {
  display: none; width: 44px; height: 44px; margin-right: -8px;
  background: none; border: 0; cursor: pointer; color: var(--white);
  align-items: center; justify-content: center; flex-shrink: 0;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  display: block; width: 22px; height: 2px; background: currentColor; border-radius: 2px;
  transition: transform 0.3s var(--ease), background 0.2s;
}
.nav-toggle span { position: relative; }
.nav-toggle span::before, .nav-toggle span::after { content: ''; position: absolute; left: 0; }
.nav-toggle span::before { top: -7px; }
.nav-toggle span::after { top: 7px; }
.nav-toggle[aria-expanded="true"] span { background: transparent; }
.nav-toggle[aria-expanded="true"] span::before { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span::after { transform: translateY(-7px) rotate(-45deg); }

.nav-cta-li, .nav-home-li { display: none; }
[id] { scroll-margin-top: 88px; }