.site-header {
  position: sticky;
  top: 0;
  backdrop-filter: blur(18px);
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  border-bottom: 1px solid var(--border);
  z-index: 10;
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  gap: 16px;
  flex-wrap: wrap;
}

.logo {
  font-weight: 700;
  letter-spacing: 0.4px;
}

.nav-list {
  display: flex;
  gap: 20px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-secondary {
  display: none;
}

.nav-home {
  color: var(--muted);
  font-weight: 600;
}

.nav-home:hover,
.nav-home:focus-visible {
  color: var(--text);
}

.nav-list a {
  color: var(--muted);
  font-weight: 500;
}

.nav-list a:focus,
.nav-list a:hover {
  color: var(--text);
}

.nav-actions {
  display: flex;
  gap: 12px;
  align-items: center;
}

.header-variant-secondary .nav-primary {
  display: none;
}

.header-variant-secondary .nav-secondary {
  display: block;
}

.cta {
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  box-shadow: var(--shadow);
}

.cta:hover,
.cta:focus-visible {
  background: var(--primary-strong);
}

.mode-toggle,
.lang-toggle {
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 8px 14px;
  font-weight: 600;
  cursor: pointer;
}

.mode-toggle:hover,
.lang-toggle:hover,
.mode-toggle:focus-visible,
.lang-toggle:focus-visible {
  border-color: var(--primary);
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 16px;
  padding: 8px 12px;
  background: var(--surface);
  color: var(--text);
  border-radius: 999px;
  border: 1px solid var(--border);
  z-index: 20;
}

.skip-link:focus {
  top: 16px;
}