/* === NAVIGATION === */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(27, 42, 94, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(196,154,26,0.2);
  transition: box-shadow var(--transition-interactive);
}
.site-header.scrolled {
  box-shadow: 0 4px 24px rgba(0,0,0,0.18);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: var(--space-8);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
}
.nav-logo-mark {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
}
.nav-logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.nav-logo-name {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.01em;
}
.nav-logo-tagline {
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-gold);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  list-style: none;
}
.nav-links a {
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.03em;
  color: rgba(255,255,255,0.82);
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}
.nav-links a:hover,
.nav-links a.active {
  color: #fff;
  border-color: var(--color-gold);
}

.nav-cta {
  flex-shrink: 0;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

/* Theme toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  color: rgba(255,255,255,0.7);
  border: 1px solid rgba(255,255,255,0.2);
  transition: all var(--transition-fast);
}
.theme-toggle:hover { color: #fff; border-color: rgba(255,255,255,0.6); }

/* Mobile menu toggle */
.nav-mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: rgba(255,255,255,0.8);
  border: 1px solid rgba(255,255,255,0.2);
}
.nav-mobile-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: all var(--transition-interactive);
}

@media (max-width: 860px) {
  .nav-links, .nav-cta { display: none; }
  .nav-mobile-toggle { display: flex; }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 72px;
    left: 0; right: 0;
    background: #1b2a5e;
    padding: var(--space-6) var(--space-6) var(--space-8);
    gap: var(--space-5);
    border-bottom: 2px solid var(--color-gold);
    box-shadow: var(--shadow-lg);
  }
  .nav-links.open a {
    font-size: var(--text-base);
    padding: var(--space-2) 0;
  }
  .nav-cta.open {
    display: block;
    position: fixed;
    top: 72px;
    left: 0; right: 0;
    padding: 0 var(--space-6) var(--space-6);
    background: #1b2a5e;
    z-index: 99;
    padding-top: 0;
  }
}