.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  backdrop-filter: blur(var(--blur-glass-md));
  -webkit-backdrop-filter: blur(var(--blur-glass-md));
  background: linear-gradient(120deg, rgba(247, 247, 251, 0.96), rgba(242, 243, 255, 0.96));
  border-bottom: 1px solid var(--color-border-subtle);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-sm);
  padding-bottom: var(--space-sm);
  gap: var(--space-md);
}
.site-header__brand {
  display: flex;
  align-items: center;
  min-width: 0;
}
.site-header__logo-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
}
.site-header__logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-pill);
  background: radial-gradient(circle at 0 0, var(--color-primary-neon), var(--color-primary));
  color: var(--color-text-on-primary);
  font-weight: 700;
  font-size: 1rem;
  box-shadow: 0 10px 25px rgba(108, 77, 255, 0.4);
}
.site-header__logo-text {
  display: flex;
  flex-direction: column;
}
.site-header__logo-title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: var(--letter-spacing-tight);
  color: var(--color-text);
}
.site-header__logo-subtitle {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-text-muted);
}
.site-header__nav {
  display: none;
}
.site-header__nav-list {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.site-header__nav-item {
  flex: 0 0 auto;
}
.site-header__nav-link {
  display: inline-flex;
  align-items: center;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-soft);
  text-decoration: none;
  white-space: nowrap;
  transition: background-color var(--transition-base), color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-fast);
}
.site-header__nav-link:hover {
  background-color: var(--color-primary-soft);
  color: var(--color-primary-strong);
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.1);
  transform: translateY(-1px);
}
.site-header__nav-item--cta .site-header__nav-link--cta {
  background: linear-gradient(135deg, var(--color-primary-strong), var(--color-primary-neon));
  color: var(--color-text-on-primary);
  box-shadow: 0 14px 32px rgba(108, 77, 255, 0.5);
}
.site-header__nav-item--cta .site-header__nav-link--cta:hover {
  background: linear-gradient(135deg, #3b1aff, var(--color-primary-neon));
}
.site-header__toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 0.25rem;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(148, 163, 184, 0.7);
  background-color: rgba(255, 255, 255, 0.95);
  cursor: pointer;
  padding: 0;
  transition: background-color var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-fast);
}
.site-header__toggle-bar {
  width: 1.3rem;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-primary-strong), var(--color-primary-neon));
  transition: transform var(--transition-base), opacity var(--transition-base);
}
.site-header__toggle:focus-visible {
  outline: 0;
  box-shadow: 0 0 0 2px var(--color-bg), 0 0 0 4px var(--color-focus-ring);
}
.site-header__mobile-nav {
  position: absolute;
  inset-inline: 0;
  top: 100%;
  transform-origin: top;
  transform: scaleY(0.9);
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
  background: radial-gradient(circle at 0 0, rgba(108, 77, 255, 0.14), transparent 55%), radial-gradient(circle at 100% 100%, rgba(0, 229, 255, 0.12), transparent 55%), var(--color-surface-glass-strong);
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.22);
  border-bottom-left-radius: var(--radius-card);
  border-bottom-right-radius: var(--radius-card);
  border-top: 1px solid var(--color-border-subtle);
  backdrop-filter: blur(var(--blur-glass-lg));
  -webkit-backdrop-filter: blur(var(--blur-glass-lg));
  transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
  z-index: calc(var(--z-header) - 1);
}
.site-header__mobile-inner {
  padding-top: var(--space-sm);
  padding-bottom: var(--space-md);
}
.site-header__mobile-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  max-height: calc(100vh - 5.5rem);
  overflow-y: auto;
}
.site-header__mobile-item--accent .site-header__mobile-link {
  background: linear-gradient(135deg, var(--color-primary-strong), var(--color-primary-neon));
  color: var(--color-text-on-primary);
  box-shadow: 0 16px 40px rgba(108, 77, 255, 0.55);
}
.site-header__mobile-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.7rem 0.9rem;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
  background-color: rgba(255, 255, 255, 0.94);
  border: 1px solid rgba(148, 163, 184, 0.4);
  transition: background-color var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-fast), color var(--transition-base);
}
.site-header__mobile-link:hover {
  background-color: rgba(108, 77, 255, 0.08);
  border-color: rgba(108, 77, 255, 0.7);
  color: var(--color-primary-strong);
  box-shadow: 0 14px 36px rgba(15, 23, 42, 0.18);
  transform: translateY(-1px);
}
.site-header--mobile-open .site-header__mobile-nav {
  opacity: 1;
  transform: scaleY(1);
  pointer-events: auto;
  visibility: visible;
}
.site-header--mobile-open .site-header__toggle-bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.site-header--mobile-open .site-header__toggle-bar:nth-child(2) {
  opacity: 0;
}
.site-header--mobile-open .site-header__toggle-bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}
@media (min-width: 1025px) {
  .site-header__nav {
    display: block;
  }
  .site-header__toggle {
    display: none;
  }
  .site-header__mobile-nav {
    display: none;
  }
}
@media (max-width: 1024px) {
  .site-header__inner {
    padding-top: 0.55rem;
    padding-bottom: 0.55rem;
  }
  .site-header__logo-subtitle {
    display: none;
  }
}
@media (max-width: 640px) {
  .site-header__logo-title {
    font-size: 0.95rem;
  }
  .site-header__logo-mark {
    width: 2rem;
    height: 2rem;
    font-size: 0.9rem;
  }
}