.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(247, 250, 249, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.7);
}

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

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.brand-logo {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, #2e946b, #1f7a5f);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-weight: 700;
  font-size: 0.95rem;
}

.brand-tagline {
  font-size: 0.75rem;
  color: var(--color-muted);
}

.site-nav {
  display: none;
  position: absolute;
  inset-inline: 0;
  top: 56px;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border-subtle);
  padding: 12px 16px 10px;
}

.site-nav ul {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.site-nav a {
  font-size: 0.9rem;
  padding: 6px 0;
  display: inline-block;
}

.site-nav a.is-active {
  color: var(--color-accent);
  font-weight: 600;
}

.nav-actions {
  margin-top: 8px;
  display: flex;
  gap: 8px;
}

.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 32px;
  height: 32px;
  border-radius: 999px;
  border: 1px solid var(--color-border-subtle);
  padding: 0 7px;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: #111827;
  border-radius: 999px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-toggle[aria-expanded="true"] span:first-child {
  transform: translateY(3px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:last-child {
  transform: translateY(-3px) rotate(-45deg);
}

.nav-toggle[aria-expanded="true"] + .site-nav {
  display: block;
}

@media (min-width: 768px) {
  .site-header {
    border-bottom: none;
  }

  .header-inner {
    padding-block: 14px;
  }

  .nav-toggle {
    display: none;
  }

  .site-nav {
    position: static;
    display: flex !important;
    align-items: center;
    justify-content: flex-end;
    gap: 24px;
    padding: 0;
    border: 0;
    background: transparent;
  }

  .site-nav ul {
    flex-direction: row;
    gap: 18px;
  }

  .nav-actions {
    margin-top: 0;
  }
}