/* ═══════════════════════════════════════════════
   NSK Aviation — Navigation Styles
═══════════════════════════════════════════════ */

/* ── NAV WRAPPER ── */
#nav {
  position: fixed;
  top: 0; left: 0; width: 100%;
  z-index: 1000;
  transition: background var(--dur-mid) var(--ease),
              padding var(--dur-mid) var(--ease);
}

#nav.scrolled {
  background: rgba(9,22,42,0.96);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 4px 40px rgba(0,0,0,0.3);
}

.nav-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 22px var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  transition: padding var(--dur-mid) var(--ease);
}

#nav.scrolled .nav-inner {
  padding-top: 14px;
  padding-bottom: 14px;
}

/* ── LOGO ── */
.nav-logo {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 4px;
  text-decoration: none;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 2px;
  transition: opacity var(--dur-fast);
}
.nav-logo:hover { opacity: 0.85; }
.nav-logo .accent { color: var(--gold); }
.nav-logo .tagline {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 3px;
  color: var(--grey);
  font-weight: 400;
  margin-left: 12px;
  text-transform: uppercase;
  padding-left: 12px;
  border-left: 1px solid var(--border);
  line-height: 1.2;
  display: none;
}
@media(min-width:1100px) {
  .nav-logo .tagline { display: block; }
}

/* ── NAV LINKS ── */
.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-link {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--grey);
  text-decoration: none;
  position: relative;
  padding-bottom: 2px;
  transition: color var(--dur-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 1px;
  background: var(--gold);
  transition: width var(--dur-mid) var(--ease);
}

.nav-link:hover,
.nav-link.active {
  color: var(--white);
}
.nav-link:hover::after,
.nav-link.active::after { width: 100%; }

/* ── NAV RIGHT ── */
.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* ── LANGUAGE TOGGLE ── */
.lang-toggle {
  display: flex;
  border: 1px solid var(--border);
  border-radius: 3px;
  overflow: hidden;
  flex-shrink: 0;
}

.lang-btn {
  padding: 7px 13px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1.5px;
  font-family: var(--font-mono);
  background: transparent;
  color: var(--grey);
  border: none;
  transition: all var(--dur-fast);
}
.lang-btn.active {
  background: var(--gold);
  color: var(--navy);
}
.lang-btn:not(.active):hover {
  color: var(--gold);
  background: rgba(201,165,92,0.06);
}

/* ── PORTAL BUTTON ── */
.nav-portal {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 20px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--gold);
  border: 1px solid rgba(201,165,92,0.4);
  border-radius: 3px;
  text-decoration: none;
  transition: all var(--dur-fast);
  white-space: nowrap;
}
.nav-portal svg { width: 13px; height: 13px; }
.nav-portal:hover {
  background: var(--gold);
  color: var(--navy);
  border-color: var(--gold);
}

/* ── HAMBURGER ── */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px; height: 36px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 8px;
  cursor: pointer;
}
.nav-hamburger span {
  display: block;
  height: 1px;
  background: var(--grey-light);
  border-radius: 1px;
  transition: all var(--dur-mid) var(--ease);
}
.nav-hamburger.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ── MOBILE MENU ── */
.nav-mobile {
  display: none;
  flex-direction: column;
  gap: 0;
  background: var(--navy-mid);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
  max-height: 0;
  transition: max-height var(--dur-slow) var(--ease);
}
.nav-mobile.open { max-height: 500px; }

.nav-mobile-link {
  display: block;
  padding: 16px var(--gutter);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--grey);
  border-bottom: 1px solid var(--border);
  transition: color var(--dur-fast), background var(--dur-fast);
}
.nav-mobile-link:hover {
  color: var(--gold);
  background: rgba(201,165,92,0.04);
}
.nav-mobile-actions {
  padding: 20px var(--gutter);
  display: flex;
  gap: 12px;
  align-items: center;
}

/* ── RESPONSIVE ── */
@media(max-width: 1024px) {
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
  .nav-mobile { display: flex; }
}
@media(max-width: 600px) {
  .nav-portal { display: none; }
}