.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 1000;
  background: rgba(8, 24, 40, 0.9);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(16px);
}

.site-navigation {
  min-height: 82px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.brand {
  display: inline-flex;
  flex-direction: column;
  color: var(--white);
  line-height: 1.05;
}

.brand-name {
  font-family: var(--font-heading);
  font-size: 1.08rem;
  font-weight: 750;
  letter-spacing: -0.025em;
}

.brand-subtitle {
  margin-top: 6px;
  color: var(--accent);
  font-size: 0.67rem;
  font-weight: 750;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.navigation-links {
  display: flex;
  align-items: center;
  gap: 30px;
  list-style: none;
}

.navigation-links a {
  position: relative;
  color: rgba(255, 255, 255, 0.82);
  font-size: 0.87rem;
  font-weight: 650;
  transition: color 180ms ease;
}

.navigation-links a:not(.navigation-cta)::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -7px;
  left: 0;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 180ms ease;
}

.navigation-links a:hover,
.navigation-links a:focus-visible {
  color: var(--white);
}

.navigation-links a:hover::after,
.navigation-links a:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

.navigation-cta {
  padding: 11px 18px;
  border-radius: 999px;
  background: var(--accent);
  color: var(--navy-dark) !important;
}

.navigation-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 10px;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.toggle-line {
  display: block;
  width: 24px;
  height: 2px;
  margin: 5px 0;
  border-radius: 4px;
  background: var(--white);
  transition: transform 180ms ease, opacity 180ms ease;
}

@media (max-width: 800px) {
  .site-navigation { min-height: 72px; }

  .navigation-toggle { display: block; }

  .navigation-toggle[aria-expanded="true"] .toggle-line:nth-child(2) {
    transform: translateY(7px) rotate(45deg);
  }

  .navigation-toggle[aria-expanded="true"] .toggle-line:nth-child(3) {
    opacity: 0;
  }

  .navigation-toggle[aria-expanded="true"] .toggle-line:nth-child(4) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .navigation-links {
    position: absolute;
    top: 100%;
    right: 0;
    left: 0;
    display: none;
    align-items: stretch;
    flex-direction: column;
    gap: 4px;
    padding: 18px 24px 26px;
    background: var(--navy-dark);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
  }

  .navigation-links.is-open { display: flex; }
  .navigation-links a { display: block; padding: 12px 0; }
  .navigation-cta { margin-top: 8px; padding: 13px 18px !important; text-align: center; }
}