.nav {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(245, 251, 255, 0.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(148, 163, 184, 0.35);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
}

.nav-logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-bg-deep);
}

.nav-logo-mark {
  width: 20px;
  height: 20px;
  border-radius: 4px;
  background: linear-gradient(180deg, #0f294a 0%, #041015 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 0 2px #ffffff, 0 0 0 4px #0b192e;
}

.nav-logo-icon {
  width: 11px;
  height: 11px;
  border-radius: 2px;
  border: 2px solid #e4f4ff;
  box-shadow: 0 0 0 1px #07111d;
  background: radial-gradient(circle at 50% 0, #8fd3ff 0, #1b4c88 70%, #020910 100%);
}

.nav-primary {
  display: flex;
  align-items: center;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-size: var(--font-size-sm);
}

.nav-link {
  position: relative;
  padding: 4px 0;
  color: var(--gray-600);
  font-weight: 500;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #cfe9ff, #1c8ed9);
  transition: width var(--transition-base);
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--color-bg-deep);
}

.nav-link:hover::after,
.nav-link:focus-visible::after {
  width: 100%;
}

.nav-link-cta {
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid rgba(7, 25, 51, 0.85);
  background: linear-gradient(135deg, #ffffff 0%, #d7ecff 45%, #9ad3ff 100%);
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.9), 0 3px 0 0 rgba(7, 25, 51, 0.85);
  font-family: var(--font-display);
  font-size: var(--font-size-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #03101d;
}

.nav-link-cta:hover,
.nav-link-cta:focus-visible {
  background: linear-gradient(135deg, #ffffff 0%, #e0f2ff 35%, #b3ddff 100%);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  width: 36px;
  height: 32px;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  border: 1px solid rgba(148, 163, 184, 0.6);
  background: rgba(255, 255, 255, 0.86);
}

.nav-toggle span {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: #0b192e;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-toggle:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: absolute;
    top: 56px;
    right: var(--space-3);
    left: var(--space-3);
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-3);
    border-radius: var(--radius-md);
    background: rgba(6, 23, 45, 0.98);
    color: #e5f2ff;
    box-shadow: 0 16px 40px rgba(15, 23, 42, 0.45);
    transform-origin: top right;
    transform: scale(0.98) translateY(-6px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
  }

  .nav-menu[data-open="true"] {
    transform: scale(1) translateY(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transition: opacity var(--transition-base), transform var(--transition-base);
  }

  .nav-menu .nav-link {
    color: #e5f2ff;
  }

  .nav-menu .nav-link-cta {
    align-self: stretch;
    text-align: center;
  }

  .nav-toggle.is-open span:nth-child(1) {
    transform: translateY(3px) rotate(45deg);
  }

  .nav-toggle.is-open span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.is-open span:nth-child(3) {
    transform: translateY(-3px) rotate(-45deg);
  }
}