.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(12px);
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0.95), rgba(248, 250, 252, 0.9));
  border-bottom: 1px solid rgba(148, 163, 184, 0.25);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-height);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.brand__logo {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: conic-gradient(from 210deg, var(--color-primary), var(--color-accent));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-weight: 700;
  font-size: 1rem;
  box-shadow: 0 10px 25px rgba(15, 23, 42, 0.3);
}

.brand__title {
  font-size: 1rem;
  font-weight: 600;
}

.brand__subtitle {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

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

.site-nav__list {
  display: flex;
  gap: 0.75rem;
}

.site-nav__link {
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  border: 1px solid transparent;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.site-nav__link:hover,
.site-nav__link:focus-visible {
  background: var(--color-primary-soft);
  color: var(--color-primary);
  border-color: rgba(15, 98, 254, 0.3);
}

.site-nav__link--active {
  background: #0f172a;
  color: #ffffff;
  border-color: transparent;
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.5);
  background: #ffffff;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
}

.nav-toggle__bar {
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: #111827;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0.5rem;
  z-index: 30;
  padding: 0.5rem 1rem;
  background: #111827;
  color: white;
  border-radius: 999px;
}

.skip-link:focus {
  left: 0.5rem;
}

@media (max-width: 768px) {
  .site-nav {
    position: absolute;
    inset-inline: 0;
    top: var(--header-height);
    background: rgba(248, 250, 252, 0.96);
    border-bottom: 1px solid rgba(148, 163, 184, 0.4);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition-normal), opacity var(--transition-normal);
  }

  .site-nav--open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .site-nav__list {
    flex-direction: column;
    padding: 0.5rem var(--space-md) 0.75rem;
  }

  .nav-toggle {
    display: inline-flex;
  }
}