/* Header shell overrides and layout */
.header-shell {
  z-index: 50;
}

.header-nav {
  align-items: center;
}

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

.header-logo-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-heading);
}

.header-logo-mark {
  position: relative;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 999px;
  background: radial-gradient(circle at 20% 0, rgba(34, 211, 238, 0.7), rgba(15, 23, 42, 1));
  box-shadow: 0 10px 26px rgba(15, 23, 42, 0.95);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.logo-dot {
  position: absolute;
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 999px;
  opacity: 0.9;
}

.logo-dot--cyan {
  top: 0.4rem;
  left: 0.45rem;
  background: var(--color-primary);
}

.logo-dot--lime {
  bottom: 0.4rem;
  right: 0.45rem;
  background: var(--color-accent);
}

.header-logo-text {
  display: flex;
  flex-direction: column;
}

.header-logo-title {
  font-family: 'Space Grotesk', var(--font-sans);
  font-size: 1.1rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.header-logo-subtitle {
  font-size: var(--text-xs);
  color: var(--color-text-soft);
}

/* Navigation links area */
.header-nav-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-6);
}

.nav-links-primary {
  align-items: center;
}

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

.header-cta {
  border-radius: var(--radius-pill);
}

/* Mobile toggle button */
.header-toggle {
  display: none;
  color: var(--color-text);
}

.header-toggle-box {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 0.22rem;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 999px;
  border: 1px solid var(--color-border-subtle);
  background: rgba(15, 23, 42, 0.9);
}

.header-toggle-bar {
  width: 1.1rem;
  height: 2px;
  border-radius: 999px;
  background: var(--color-text-muted);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.header-toggle.is-active .header-toggle-bar:nth-child(1) {
  transform: translateY(4px) rotate(45deg);
}

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

.header-toggle.is-active .header-toggle-bar:nth-child(3) {
  transform: translateY(-4px) rotate(-45deg);
}

/* Mobile behaviour */
@media (max-width: 767.98px) {
  .header-toggle {
    display: inline-flex;
  }

  .header-nav-links {
    position: fixed;
    inset-inline: 0;
    top: 3.5rem;
    background: radial-gradient(circle at top, rgba(15, 23, 42, 0.98), rgba(15, 23, 42, 0.96));
    border-bottom: 1px solid var(--color-border-subtle);
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-3) var(--space-4) var(--space-4);
    gap: var(--space-3);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transition: max-height var(--transition-slow), opacity var(--transition-base), visibility var(--transition-base);
  }

  .header-nav-links.is-open {
    max-height: 18rem;
    opacity: 1;
    visibility: visible;
  }

  .nav-links-primary {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }

  .nav-link {
    width: 100%;
    display: inline-flex;
    justify-content: flex-start;
    padding-block: 0.4rem;
  }

  .header-cta-wrap {
    justify-content: flex-start;
  }
}

/* Medium & up: inline nav */
@media (min-width: 768px) {
  .header-nav-links {
    max-height: none !important;
    opacity: 1 !important;
    visibility: visible !important;
  }
}

/* Focus styles refinement for header elements */
.header-toggle:focus-visible,
.header-logo-link:focus-visible {
  box-shadow: 0 0 0 2px rgba(15, 23, 42, 1), 0 0 0 4px rgba(34, 211, 238, 0.9);
  border-radius: 999px;
}