.cqs-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(14px);
  background: linear-gradient(to bottom, rgba(5, 8, 20, 0.96), rgba(5, 8, 20, 0.88));
  border-bottom: 1px solid rgba(35, 39, 66, 0.9);
}

.cqs-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-3);
  padding-bottom: var(--space-3);
  gap: var(--space-3);
}

.cqs-header__brand {
  display: flex;
  align-items: center;
  min-width: 0;
}

.cqs-header__logo-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.cqs-header__logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 40%;
  border: 2px solid var(--color-primary);
  box-shadow: var(--shadow-glow-primary);
  background:
    radial-gradient(circle at 25% 20%, rgba(70, 224, 200, 0.45), transparent 55%),
    radial-gradient(circle at 70% 80%, rgba(255, 76, 106, 0.4), transparent 60%),
    #050814;
  position: relative;
}

.cqs-header__logo-mark::after {
  content: "";
  position: absolute;
  inset: 18%;
  border-radius: 50%;
  border: 2px solid rgba(243, 245, 255, 0.4);
}

.cqs-header__title {
  display: flex;
  flex-direction: column;
}

.cqs-header__title-main {
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gray-50);
}

.cqs-header__title-tagline {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.cqs-header__nav {
  display: flex;
}

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

.cqs-header__nav-link {
  position: relative;
  font-size: var(--font-size-sm);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gray-200);
  padding: 0.3rem 0;
}

.cqs-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.15rem;
  width: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-success));
  transition: width var(--transition-normal);
}

.cqs-header__nav-link:hover,
.cqs-header__nav-link:focus-visible {
  color: var(--gray-50);
}

.cqs-header__nav-link:hover::after,
.cqs-header__nav-link:focus-visible::after {
  width: 100%;
}

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

.cqs-header__nav-cta {
  font-size: var(--font-size-xs);
}

.cqs-header__nav-cta-icon {
  display: inline-flex;
  align-items: center;
}

.cqs-header__toggle {
  display: none;
  position: relative;
  width: 42px;
  height: 32px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border-subtle);
  background: rgba(5, 8, 20, 0.92);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.cqs-header__toggle-bar {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: var(--gray-100);
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.cqs-header__toggle-bar + .cqs-header__toggle-bar {
  margin-top: 4px;
}

.cqs-header__toggle[aria-expanded="true"] .cqs-header__toggle-bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.cqs-header__toggle[aria-expanded="true"] .cqs-header__toggle-bar:nth-child(2) {
  opacity: 0;
}

.cqs-header__toggle[aria-expanded="true"] .cqs-header__toggle-bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

@media (max-width: 768px) {
  .cqs-header__inner {
    padding-top: var(--space-2);
    padding-bottom: var(--space-2);
  }

  .cqs-header__toggle {
    display: inline-flex;
    flex-direction: column;
  }

  .cqs-header__nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    background: radial-gradient(circle at top, #151b3a 0, #050814 55%, #01020a 100%);
    border-bottom: 1px solid var(--color-border-subtle);
    transform-origin: top;
  }

  .cqs-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-3) var(--space-4);
  }

  .cqs-header__nav-item--cta {
    width: 100%;
    margin-left: 0;
  }

  .cqs-header__nav-cta {
    width: 100%;
    justify-content: center;
  }

  .cqs-header__nav {
    display: none;
  }

  .cqs-header__nav.cqs-header__nav--open {
    display: block;
  }
}

@media (prefers-reduced-motion: reduce) {
  .cqs-header__toggle-bar {
    transition: none;
  }
}