.avc-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(var(--backdrop-blur-soft));
  -webkit-backdrop-filter: blur(var(--backdrop-blur-soft));
  background: linear-gradient(to bottom, rgba(5, 5, 12, 0.95), rgba(5, 5, 12, 0.85));
  border-bottom: 1px solid var(--color-border-subtle);
}

.avc-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);
}

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

.avc-header__logo-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
}

.avc-header__logo-mark {
  width: 40px;
  height: 40px;
  border-radius: 999px;
  background: conic-gradient(from 160deg, var(--color-accent-emerald), var(--color-primary), var(--color-accent-violet), var(--color-accent-emerald));
  position: relative;
  box-shadow: var(--shadow-aurora-glow);
}

.avc-header__logo-mark::after {
  content: "";
  position: absolute;
  inset: 4px;
  border-radius: inherit;
  background: radial-gradient(circle at 30% 20%, rgba(245, 199, 106, 0.55), transparent 55%),
    radial-gradient(circle at 70% 80%, rgba(5, 5, 12, 0.98), rgba(5, 5, 12, 0.98));
}

.avc-header__logo-text {
  display: flex;
  flex-direction: column;
}

.avc-header__logo-primary {
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.avc-header__logo-tagline {
  font-size: var(--font-size-xs);
  color: var(--color-text-soft);
}

.avc-header__nav {
  display: none;
}

.avc-header__nav-list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 0;
  margin: 0;
}

.avc-header__nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 0.35rem 0.25rem;
  font-size: var(--font-size-sm);
  color: var(--color-text-soft);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.avc-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -0.35rem;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-accent-emerald), var(--color-primary), var(--color-accent-violet));
  transform-origin: center;
  transform: scaleX(0);
  opacity: 0;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

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

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

.avc-header__nav-item--cta .avc-header__nav-link--cta {
  padding-inline: 1rem;
  padding-block: 0.45rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(245, 199, 106, 0.65);
  background: radial-gradient(circle at 0 0, rgba(245, 199, 106, 0.25), transparent 55%),
    linear-gradient(135deg, rgba(10, 10, 24, 0.9), rgba(10, 10, 24, 0.98));
  color: var(--color-accent-gold) !important;
  box-shadow: var(--shadow-gold-glow);
}

.avc-header__nav-item--cta .avc-header__nav-link--cta::after {
  display: none;
}

.avc-header__nav-item--cta .avc-header__nav-link--cta:hover,
.avc-header__nav-item--cta .avc-header__nav-link--cta:focus-visible {
  background: linear-gradient(135deg, rgba(245, 199, 106, 0.16), rgba(245, 199, 106, 0.28));
  color: #0b0b16;
}

.avc-header__toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border-subtle);
  background-color: rgba(10, 10, 24, 0.92);
  color: var(--color-text);
  cursor: pointer;
}

.avc-header__toggle-bar {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-accent-emerald), var(--color-primary));
  transition: transform var(--transition-normal), opacity var(--transition-normal), background var(--transition-normal);
}

.avc-header__toggle:focus-visible {
  box-shadow: 0 0 0 1px rgba(5, 5, 9, 0.9), 0 0 0 3px var(--focus-ring-color);
}

.avc-header__toggle--open .avc-header__toggle-bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.avc-header__toggle--open .avc-header__toggle-bar:nth-child(2) {
  opacity: 0;
}

.avc-header__toggle--open .avc-header__toggle-bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/***** Mobile nav *****/

@media (max-width: 767.98px) {
  .avc-header__nav {
    position: fixed;
    inset-inline: 0;
    top: 60px;
    background: radial-gradient(circle at 0 0, rgba(31, 226, 154, 0.12), transparent 55%),
      radial-gradient(circle at 100% 0, rgba(168, 77, 255, 0.18), transparent 55%),
      rgba(5, 5, 14, 0.98);
    border-bottom: 1px solid var(--color-border-subtle);
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity var(--transition-normal), transform var(--transition-normal), visibility var(--transition-normal);
  }

  .avc-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-4) var(--container-padding-x) var(--space-6);
    gap: var(--space-3);
  }

  .avc-header__nav-link {
    font-size: var(--font-size-md);
  }

  .avc-header__nav--open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
  }
}

/***** Desktop nav *****/

@media (min-width: 768px) {
  .avc-header__toggle {
    display: none;
  }

  .avc-header__nav {
    display: block;
  }

  .avc-header__nav-list {
    gap: var(--space-4);
  }
}

@media (min-width: 1024px) {
  .avc-header__logo-primary {
    font-size: 1.15rem;
  }

  .avc-header__logo-tagline {
    font-size: var(--font-size-sm);
  }
}

@media (max-width: 767.98px) {
  .avc-header__nav {
    display: block;
    position: fixed;
    inset-inline: 0;
    top: 60px;
    z-index: 999;
    background: radial-gradient(circle at 0 0, rgba(31, 226, 154, 0.12), transparent 55%),
    radial-gradient(circle at 100% 0, rgba(168, 77, 255, 0.18), transparent 55%),
    rgba(5, 5, 14, 0.98);
    border-bottom: 1px solid var(--color-border-subtle);
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity var(--transition-normal), transform var(--transition-normal), visibility var(--transition-normal);
  }

  .avc-header__nav--open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
  }
}