.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  background: linear-gradient(to bottom, rgba(248, 250, 252, 0.96), rgba(248, 250, 252, 0.85));
  border-bottom: 1px solid var(--color-border-subtle);
}
.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-top: var(--space-3);
  padding-bottom: var(--space-3);
}
.site-header-brand {
  display: flex;
  align-items: center;
  min-width: 0;
}
.site-header-logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--color-border-soft);
  box-shadow: var(--shadow-subtle);
}
.site-header-logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 999px;
  background-image: var(--gradient-accent);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-text-main);
}
.site-header-logo-text {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}
.site-header-logo-title {
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-main);
}
.site-header-logo-subtitle {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}
.site-header-nav {
  flex: 1 1 auto;
}
.site-header-nav-list {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  list-style: none;
  padding: 0;
  margin: 0;
}
.site-header-nav-item {
  position: relative;
}
.site-header-nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-pill);
  font-size: var(--text-sm);
  color: var(--color-text-soft);
}
.site-header-nav-link::after {
  content: "";
  position: absolute;
  left: 0.8rem;
  right: 0.8rem;
  bottom: 0.25rem;
  height: 2px;
  border-radius: 999px;
  background-image: var(--gradient-accent);
  opacity: 0;
  transform: scaleX(0.6);
  transform-origin: center;
  transition: opacity var(--transition-base), transform var(--transition-base);
}
.site-header-nav-link:hover {
  color: var(--color-text-main);
}
.site-header-nav-item.is-active .site-header-nav-link {
  color: var(--color-text-main);
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow-subtle);
}
.site-header-nav-item.is-active .site-header-nav-link::after {
  opacity: 1;
  transform: scaleX(1);
}
.site-header-cta {
  display: flex;
  align-items: center;
}
.site-header-toggle {
  display: none;
  position: relative;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 999px;
  border: 1px solid var(--color-border-soft);
  background: rgba(255, 255, 255, 0.95);
  padding: 0;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}
.site-header-toggle-bar {
  width: 1.3rem;
  height: 2px;
  border-radius: 999px;
  background: #0f172a;
  transition: transform var(--transition-base), opacity var(--transition-base), translate var(--transition-base);
}
.site-header-toggle-bar + .site-header-toggle-bar {
  margin-top: 0.22rem;
}
.site-header-mobile-nav {
  position: fixed;
  inset: 0 0 auto 0;
  top: 0;
  transform: translateY(-100%);
  opacity: 0;
  pointer-events: none;
  transition: transform var(--transition-base), opacity var(--transition-base);
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}
.site-header-mobile-nav.is-open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}
.site-header-mobile-inner {
  padding-top: calc(var(--space-12));
  padding-bottom: var(--space-6);
}
.site-header-mobile-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  max-height: calc(100vh - 8rem);
  overflow-y: auto;
}
.site-header-mobile-item.is-active .site-header-mobile-link {
  background: rgba(248, 250, 252, 0.12);
  border-color: rgba(165, 243, 207, 0.9);
}
.site-header-mobile-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.8rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(148, 163, 184, 0.4);
  color: var(--color-text-inverse);
  font-size: var(--text-md);
}
.site-header-mobile-extra {
  margin-top: var(--space-4);
}
.site-header-mobile-extra-link {
  font-size: var(--text-sm);
  color: rgba(226, 232, 240, 0.9);
}
.site-header-mobile-extra-link:hover {
  color: #e0f2fe;
}
.site-header-mobile-nav::before {
  content: "";
  position: fixed;
  inset: 0;
  background: radial-gradient(circle at top left, rgba(34, 211, 238, 0.3), transparent 55%), radial-gradient(circle at bottom right, rgba(165, 243, 207, 0.3), transparent 55%);
  opacity: 0.9;
  pointer-events: none;
}
.site-header-mobile-inner {
  position: relative;
  z-index: 1;
}
.site-header-mobile-link::after {
  content: "";
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 999px;
  background: var(--color-mint);
  box-shadow: 0 0 0 4px rgba(165, 243, 207, 0.25);
}
.site-header-mobile-item.is-active .site-header-mobile-link::after {
  background: var(--color-turquoise);
}
.site-header-mobile-nav.is-open ~ .overlay-header {
  opacity: 1;
  pointer-events: auto;
}
@media (max-width: 1023px) {
  .site-header-inner {
    padding-top: var(--space-2);
    padding-bottom: var(--space-2);
  }
  .site-header-nav {
    display: none;
  }
  .site-header-cta {
    display: none;
  }
  .site-header-toggle {
    display: flex;
    flex-direction: column;
    z-index: 1000;
  }
  .site-header-mobile-nav {
    left: 0;
    right: 0;
  }
  .site-header-toggle.is-open .site-header-toggle-bar:nth-child(1) {
    transform: translateY(0.24rem) rotate(45deg);
  }
  .site-header-toggle.is-open .site-header-toggle-bar:nth-child(2) {
    opacity: 0;
  }
  .site-header-toggle.is-open .site-header-toggle-bar:nth-child(3) {
    transform: translateY(-0.24rem) rotate(-45deg);
  }
}
@media (max-width: 639px) {
  .site-header-logo-subtitle {
    display: none;
  }
}
@media (min-width: 1024px) {
  .site-header-mobile-nav {
    display: none;
  }
}