.tlx-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  background: linear-gradient(to bottom, rgba(5, 7, 11, 0.96), rgba(5, 7, 11, 0.9));
  border-bottom: 1px solid rgba(37, 42, 57, 0.9);
}

.tlx-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-3);
  padding-bottom: var(--space-3);
  gap: var(--space-4);
}

.tlx-header__brand {
  display: flex;
  align-items: center;
}

.tlx-header__logo {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--color-white);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: var(--font-size-sm);
}

.tlx-header__logo-mark {
  width: 28px;
  height: 28px;
  border-radius: 32% 68% 60% 40% / 40% 40% 60% 60%;
  background: radial-gradient(circle at 20% 0%, rgba(72, 247, 226, 0.9), transparent 58%),
              radial-gradient(circle at 80% 100%, rgba(47, 125, 246, 0.95), transparent 55%),
              #020617;
  box-shadow: 0 0 14px rgba(72, 247, 226, 0.7);
}

.tlx-header__logo-text {
  white-space: nowrap;
}

.tlx-header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.tlx-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.tlx-header__nav-link {
  position: relative;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  padding: 0.25rem 0;
}

.tlx-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -0.3rem;
  height: 2px;
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, var(--color-accent-neon), var(--color-primary));
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--transition-fast);
}

.tlx-header__nav-link:focus-visible::after,
.tlx-header__nav-link:hover::after {
  transform: scaleX(1);
}

.tlx-header__nav-link:hover,
.tlx-header__nav-link:focus-visible {
  color: var(--color-white);
}

.tlx-header__cta-wrap {
  display: flex;
  align-items: center;
}

.tlx-header__cta {
  font-size: var(--font-size-xs);
}

.tlx-header__toggle {
  position: relative;
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(72, 247, 226, 0.6);
  background: radial-gradient(circle at 0% 0%, rgba(72, 247, 226, 0.24), transparent 55%),
              rgba(6, 10, 20, 0.95);
  cursor: pointer;
  color: var(--color-white);
  transition: background var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}

.tlx-header__toggle-bar {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background-color: var(--color-white);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.tlx-header__toggle:hover {
  box-shadow: 0 0 12px rgba(72, 247, 226, 0.55);
  transform: translateY(-1px);
}

.tlx-header__toggle[aria-expanded="true"] .tlx-header__toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.tlx-header__toggle[aria-expanded="true"] .tlx-header__toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile / tablet layout */
@media (max-width: 768px) {
  .tlx-header__toggle {
    display: inline-flex;
  }

  .tlx-header__nav {
    position: fixed;
    inset-inline: 0;
    top: 64px;
    max-height: 0;
    overflow: hidden;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: radial-gradient(circle at 0% 0%, rgba(72, 247, 226, 0.18), transparent 60%),
                rgba(5, 7, 11, 0.98);
    border-bottom: 1px solid rgba(37, 42, 57, 0.9);
    transition: max-height var(--transition-slow);
  }

  .tlx-header__nav--open {
    max-height: 420px;
  }

  .tlx-header__nav-list {
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-3) var(--space-4) 0;
    gap: var(--space-2);
  }

  .tlx-header__nav-link {
    padding: 0.6rem 0.2rem;
  }

  .tlx-header__nav-link::after {
    display: none;
  }

  .tlx-header__cta-wrap {
    padding: 0 var(--space-4) var(--space-4);
    justify-content: flex-start;
  }
}

/* Desktop layout */
@media (min-width: 769px) {
  .tlx-header__toggle {
    display: none;
  }

  .tlx-header__nav {
    position: static;
    max-height: none !important;
    overflow: visible;
  }
}

/* Reduce motion */
@media (prefers-reduced-motion: reduce) {
  .tlx-header__nav {
    transition: none;
  }
}