.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
  background: rgba(255, 255, 255, 0.86);
  border-bottom: 1px solid var(--border-soft);
  box-shadow: 0 12px 24px rgba(10, 46, 75, 0.08);
}

.header-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 0;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.02em;
}

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

.nav-root {
  position: relative;
}

.nav-trigger {
  list-style: none;
  cursor: pointer;
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-strong);
  font-weight: 600;
}

.nav-trigger::marker {
  display: none;
}

.nav-trigger__icon {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid var(--ink-700);
  border-top: none;
  border-left: none;
  transform: rotate(45deg);
  margin-left: 0.5rem;
}

.nav-main {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.4rem 1.2rem;
  padding: 1rem;
  background: var(--surface-0);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  position: absolute;
  right: 0;
  top: 3rem;
  min-width: 220px;
}

.nav-link {
  color: var(--ink-900);
  font-weight: 600;
}

.header-cta {
  display: none;
}

@media (min-width: 900px) {
  .nav-root {
    position: static;
  }

  .nav-trigger {
    display: none;
  }

  .nav-main {
    position: static;
    display: flex;
    gap: 1.25rem;
    background: transparent;
    border: none;
    padding: 0;
    box-shadow: none;
  }

  .header-cta {
    display: inline-flex;
  }
}

@media (max-width: 899px) {
  .nav-root:not([open]) .nav-main {
    display: none;
  }
}