.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(18px);
  background: linear-gradient(to bottom, rgba(243, 244, 249, 0.96), rgba(243, 244, 249, 0.9));
  box-shadow: 0 1px 0 rgba(30, 27, 75, 0.05);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
}

.nav-group {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-group-left .nav-menu-left,
.nav-group-right .nav-menu-right {
  display: flex;
  align-items: center;
  gap: var(--space-7);
}

.nav-logo {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-logo-link {
  text-decoration: none;
}

.nav-logo-mark {
  border-radius: 999px;
  padding: 0.45rem 1.4rem;
  background: linear-gradient(145deg, #ffffff, #f1f3ff);
  box-shadow: var(--shadow-soft);
  font-family: var(--font-display);
  font-size: 0.86rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-text);
  white-space: nowrap;
}

.nav-menu-left,
.nav-menu-right {
  font-size: var(--font-size-sm);
}

.nav-link {
  font-size: var(--font-size-sm);
  color: var(--color-muted-text);
  padding: 0.4rem 0.6rem;
  border-radius: var(--radius-pill);
  transition: color var(--transition-fast), background-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--color-text);
  background-color: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-soft);
}

.nav-link-cta {
  background: linear-gradient(145deg, #ff8b6d, #ff6b46);
  color: #ffffff;
  box-shadow: var(--shadow-soft);
}

.nav-link-cta:hover,
.nav-link-cta:focus-visible {
  color: #ffffff;
  background: linear-gradient(145deg, #ff9b7f, #ff6b46);
  transform: translateY(-1px);
  box-shadow: var(--shadow-medium);
}

.nav-toggle {
  display: none;
}

.nav-toggle-button {
  width: 40px;
  height: 40px;
  border-radius: 999px;
  background: #ffffff;
  box-shadow: var(--shadow-soft);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.nav-toggle-icon {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background-color: var(--color-text);
  position: relative;
  transition: background-color var(--transition-medium), transform var(--transition-medium);
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background-color: var(--color-text);
  transition: transform var(--transition-medium), top var(--transition-medium), opacity var(--transition-medium);
}

.nav-toggle-icon::before {
  top: -5px;
}

.nav-toggle-icon::after {
  top: 5px;
}

.nav-toggle-button[aria-expanded="true"] .nav-toggle-icon {
  background-color: transparent;
}

.nav-toggle-button[aria-expanded="true"] .nav-toggle-icon::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-toggle-button[aria-expanded="true"] .nav-toggle-icon::after {
  top: 0;
  transform: rotate(-45deg);
}

.nav-menu-mobile {
  display: none;
}

.nav-menu-mobile-list {
  padding: var(--space-8);
  margin: 0;
  display: grid;
  gap: var(--space-5);
}

.nav-menu-mobile-list .nav-link {
  display: block;
}

@media (max-width: 960px) {
  .nav-group-left .nav-menu-left,
  .nav-group-right .nav-menu-right {
    display: none;
  }

  .nav-toggle {
    display: flex;
    flex-direction: column;
  }

  .nav-logo {
    position: static;
    transform: none;
    margin: 0 auto;
  }

  .nav-menu-mobile {
    display: block;
    position: fixed;
    inset: var(--nav-height) var(--space-8) auto var(--space-8);
    border-radius: 24px;
    background: rgba(243, 244, 249, 0.98);
    box-shadow: var(--shadow-medium);
    transform-origin: top right;
    transform: scale(0.95);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-medium), transform var(--transition-medium);
    z-index: 45;
  }

  .nav-menu-mobile.is-open {
    opacity: 1;
    transform: scale(1);
    pointer-events: auto;
  }
}

@media (max-width: 640px) {
  .nav-menu-mobile {
    inset: var(--nav-height) var(--space-7) auto var(--space-7);
  }
}

@media (prefers-reduced-motion: reduce) {
  .nav-menu-mobile {
    transition: none;
  }
}