.zz-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(20px);
  background: linear-gradient(90deg, rgba(5, 6, 10, 0.96), rgba(5, 6, 10, 0.8));
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.zz-header__inner {
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: var(--space-3);
  padding-bottom: var(--space-3);
  position: relative;
}

.zz-header__nav {
  flex: 1 1 auto;
}

.zz-header__nav-list {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  align-items: center;
  gap: var(--space-4);
}

.zz-header__nav-item {
  text-align: center;
}

.zz-header__nav-item--center {
  display: flex;
  justify-content: center;
}

.zz-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  background: radial-gradient(circle at 0 0, rgba(255, 216, 73, 0.24), transparent 55%),
              radial-gradient(circle at 100% 100%, rgba(255, 59, 63, 0.22), transparent 40%),
              linear-gradient(135deg, rgba(15, 23, 42, 0.96), rgba(15, 15, 36, 0.98));
  box-shadow: var(--shadow-soft);
}

.zz-header__brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  background: conic-gradient(from 140deg, var(--color-primary), var(--color-accent-yellow), var(--color-accent-red), var(--color-primary));
  position: relative;
}

.zz-header__brand-mark::after {
  content: "";
  position: absolute;
  inset: 4px;
  border-radius: 5px;
  background: #05060a;
}

.zz-header__brand-text {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: var(--fs-xs);
}

.zz-header__brand-text span {
  margin-left: 0.25rem;
  color: var(--color-accent-yellow);
}

.zz-header__nav-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 0.75rem;
  font-size: var(--fs-xs);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-text-soft);
}

.zz-header__nav-link::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -0.35rem;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent-yellow));
  transform: translateX(-50%);
  transition: width var(--transition-base);
}

.zz-header__nav-link:hover::after,
.zz-header__nav-link:focus-visible::after {
  width: 60%;
}

.zz-header__cta {
  position: absolute;
  right: var(--page-gutter-x);
  display: inline-flex;
}

/* Mobile toggle */
.zz-header__toggle {
  position: absolute;
  left: var(--page-gutter-x);
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
  width: 40px;
  height: 40px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(5, 6, 10, 0.75);
  cursor: pointer;
  color: var(--color-text);
}

.zz-header__toggle-bar {
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--color-text);
  transition: var(--transition-transform);
}

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

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

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

/* Mobile layout */
@media (max-width: 960px) {
  .zz-header__inner {
    justify-content: center;
    padding-top: var(--space-2);
    padding-bottom: var(--space-2);
  }

  .zz-header__toggle {
    display: inline-flex;
  }

  .zz-header__cta {
    position: static;
    margin-left: auto;
    font-size: var(--fs-xs);
    padding-inline: 0.9rem;
  }

  .zz-header__nav {
    position: fixed;
    inset: 0 0 auto 0;
    top: 56px;
    background: radial-gradient(circle at 0 0, rgba(255, 216, 73, 0.16), transparent 55%),
                radial-gradient(circle at 100% 0, rgba(30, 136, 255, 0.18), transparent 55%),
                linear-gradient(180deg, rgba(5, 6, 10, 0.98), rgba(5, 6, 10, 0.98));
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-transform);
  }

  .zz-header__nav-list {
    grid-template-columns: 1fr;
    padding: var(--space-6) var(--page-gutter-x) var(--space-8);
    gap: var(--space-5);
  }

  .zz-header__nav-item--center {
    order: -1;
    margin-bottom: var(--space-3);
  }

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

  .zz-header__nav-link {
    width: 100%;
    justify-content: flex-start;
    padding-inline: 0;
    font-size: var(--fs-sm);
  }

  .zz-header__nav-link::before {
    content: "";
    width: 28px;
    height: 2px;
    margin-right: var(--space-3);
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent-yellow), var(--color-accent-red));
  }

  .zz-header__nav--open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
}

@media (min-width: 961px) {
  .zz-header__nav {
    position: static;
    transform: none !important;
    opacity: 1 !important;
    visibility: visible !important;
  }
}

.zz-header__nav a:focus-visible,
.zz-header__brand:focus-visible {
  outline: 2px solid var(--color-accent-yellow);
  outline-offset: 3px;
}