.header-shell {
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.04);
}

.header-brand {
  display: flex;
  align-items: center;
}

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

.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: radial-gradient(circle at 30% 20%, var(--color-primary) 0, var(--color-primary-soft) 45%, #ffffff 85%);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
}

.brand-mark-inner {
  width: 22px;
  height: 22px;
  border-radius: 12px;
  background: conic-gradient(from 160deg, var(--color-accent-turquoise), var(--color-accent-blue), var(--color-primary));
  opacity: 0.7;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-gray-900);
}

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

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

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-item-cta {
  margin-left: var(--space-2);
}

.nav-link {
  position: relative;
  font-size: 0.9rem;
  color: var(--color-gray-700);
  padding: 0.3rem 0.1rem;
  border-radius: var(--radius-full);
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--color-primary);
}

.nav-link.is-active {
  color: var(--color-gray-900);
}

.nav-link.is-active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -0.25rem;
  height: 2px;
  border-radius: var(--radius-full);
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent-turquoise));
}

.nav-cta-link {
  font-size: 0.8rem;
}

.nav-toggle {
  display: none;
  position: relative;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(227, 221, 224, 0.9);
  background: rgba(255, 255, 255, 0.9);
  align-items: center;
  justify-content: center;
  padding: 0;
}

.nav-toggle-bar {
  position: relative;
  width: 18px;
  height: 2px;
  border-radius: var(--radius-full);
  background-color: var(--color-gray-700);
  display: block;
  transition: transform var(--transition-base), opacity var(--transition-base), background-color var(--transition-base);
}

.nav-toggle-bar + .nav-toggle-bar {
  margin-top: 4px;
}

.nav-toggle.is-open .nav-toggle-bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle.is-open .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-open .nav-toggle-bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

@media (max-width: 900px) {
  .nav-toggle {
    display: inline-flex;
    flex-direction: column;
  }

  .primary-nav {
    position: fixed;
    inset: 64px 0 auto 0;
    background: rgba(255, 250, 246, 0.98);
    border-bottom: 1px solid rgba(227, 221, 224, 0.9);
    transform: translateY(-110%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition-base), opacity var(--transition-base);
  }

  .primary-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-links {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-4) var(--space-4) var(--space-5);
  }

  .nav-item-cta {
    width: 100%;
    margin-left: 0;
    margin-top: var(--space-2);
  }

  .nav-cta-link {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 520px) {
  .brand-subtitle {
    display: none;
  }
}