.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(246, 248, 251, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(5, 9, 19, 0.08);
}

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

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

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.brand-name {
  font-weight: 700;
  font-family: var(--font-display);
  letter-spacing: -0.01em;
}

.brand-tagline {
  font-size: 0.78rem;
  color: var(--color-ink-muted);
}

.nav-root {
  position: relative;
}

.nav-trigger {
  list-style: none;
  cursor: pointer;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

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

.nav-trigger__icon {
  display: inline-block;
  width: 16px;
  height: 2px;
  background: var(--color-ink);
  box-shadow: 0 5px 0 var(--color-ink), 0 -5px 0 var(--color-ink);
}

.nav-main {
  position: absolute;
  right: 0;
  top: calc(100% + 10px);
  display: grid;
  gap: var(--space-2);
  padding: var(--space-4);
  min-width: 200px;
  background: var(--color-white);
  border-radius: var(--radius-md);
  border: var(--border-subtle);
  box-shadow: var(--shadow-soft);
}

.nav-root:not([open]) .nav-main {
  display: none;
}

.nav-link {
  font-weight: 600;
}

.header-cta {
  display: none;
}

@media (min-width: 860px) {
  .nav-root {
    position: static;
  }

  .nav-trigger {
    display: none;
  }

  .nav-main {
    position: static;
    display: flex;
    gap: var(--space-4);
    padding: 0;
    min-width: auto;
    background: transparent;
    border: none;
    box-shadow: none;
  }

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