:root {
  --site-glass-bg: rgb(255 255 255 / 0.76);
  --site-glass-border: rgb(148 163 184 / 0.28);
  --site-glass-shadow: 0 16px 40px rgb(15 23 42 / 0.1);
}

html.dark {
  --site-glass-bg: rgb(15 23 42 / 0.76);
  --site-glass-border: rgb(148 163 184 / 0.2);
  --site-glass-shadow: 0 16px 40px rgb(2 6 23 / 0.32);
}

body {
  min-height: 100vh;
  background: var(--surface, #f8fafc);
  color: var(--text, #0f172a);
}

.page-shell {
  width: min(100% - 2rem, 76rem);
  margin-inline: auto;
}

.site-header {
  position: relative;
  top: auto;
  z-index: 100;
  margin: 0;
  transition: padding .2s ease;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 1rem;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
  transition: all .2s ease;
}

.site-header.is-scrolled {
  position: sticky;
  top: 0;
  padding: .75rem 1rem;
}

.site-header.is-scrolled .site-nav {
  border: 1px solid var(--site-glass-border);
  border-radius: 1.25rem;
  background: var(--site-glass-bg);
  box-shadow: var(--site-glass-shadow);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  backdrop-filter: blur(18px) saturate(150%);
}

.brand-block,
.nav-link {
  color: inherit;
  text-decoration: none;
}

.brand-block {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
}

.brand-logo {
  width: auto;
  height: 2rem;
  object-fit: contain;
}

.nav-row {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-link {
  color: var(--text-muted, #64748b);
  font-size: 0.875rem;
  font-weight: 600;
}

.nav-link:hover,
.nav-link.is-current {
  color: var(--primary, #2563eb);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border: 1px solid var(--site-glass-border);
  border-radius: 0.75rem;
  background: transparent;
  color: inherit;
  cursor: pointer;
}

@media (max-width: 700px) {
  .page-shell {
    width: min(100% - 1rem, 76rem);
  }

  .site-nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-row {
    width: 100%;
    flex-wrap: wrap;
    gap: 0.75rem;
  }
}