.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  background: rgba(248, 251, 251, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: var(--border-subtle);
}

.header-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) 0;
  gap: var(--space-4);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

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

.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
}

.brand-tagline {
  font-size: 0.85rem;
  color: var(--color-ink-muted);
}

.nav-root {
  position: relative;
}

.nav-trigger {
  list-style: none;
  cursor: pointer;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  border: var(--border-subtle);
  font-weight: 600;
  font-family: var(--font-display);
  display: none;
}

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

.nav-trigger::marker {
  content: "";
}

.nav-trigger__icon {
  display: inline-block;
  width: 16px;
  height: 2px;
  background: var(--color-ink);
  position: relative;
  margin-left: var(--space-2);
}

.nav-trigger__icon::before,
.nav-trigger__icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  background: var(--color-ink);
}

.nav-trigger__icon::before {
  top: -6px;
}

.nav-trigger__icon::after {
  top: 6px;
}

.nav-main {
  display: flex;
  gap: var(--space-4);
  align-items: center;
}

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

.header-cta {
  white-space: nowrap;
}

@media (max-width: 900px) {
  .nav-main {
    position: absolute;
    right: 0;
    top: calc(100% + 8px);
    background: var(--color-white);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    box-shadow: var(--shadow-card);
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
    min-width: 220px;
    display: none;
  }

  .nav-root[open] .nav-main {
    display: flex;
  }

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

  .header-cta {
    display: none;
  }
}