/* Header layout */
.ozp-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: linear-gradient(180deg, rgba(11, 16, 32, 0.97), rgba(11, 16, 32, 0.9));
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--color-border-subtle);
}

.ozp-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);
}

/* Brand */
.ozp-header__brand {
  display: flex;
  align-items: center;
}

.ozp-header__logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--gray-50);
  font-family: var(--font-heading);
  font-weight: 600;
  letter-spacing: 0.02em;
}

.ozp-header__logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 12px;
  background: conic-gradient(from 210deg, #2f8cff, #47b2ff, #2f8cff);
  position: relative;
  box-shadow: 0 0 0 2px rgba(20, 39, 80, 0.9);
}

.ozp-header__logo-mark::after {
  content: "";
  position: absolute;
  inset: 5px;
  border-radius: 10px;
  background: radial-gradient(circle at 20% 0, rgba(255, 255, 255, 0.18), transparent 55%),
              radial-gradient(circle at 80% 100%, rgba(10, 255, 195, 0.26), transparent 55%),
              #050814;
}

.ozp-header__logo-text {
  font-size: 1rem;
  white-space: nowrap;
}

.ozp-header__logo-text span {
  color: var(--color-primary);
}

/* Navigation */
.ozp-header__nav {
  display: flex;
}

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

.ozp-header__nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  font-weight: 500;
}

.ozp-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -0.1rem;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, #2f8cff, #47b2ff);
  transform-origin: center;
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

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

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

.ozp-header__nav-item--cta .ozp-header__nav-link {
  padding-left: 1rem;
  padding-right: 1rem;
}

.ozp-header__nav-link--cta {
  border-radius: var(--radius-pill);
  border: 1px solid rgba(47, 140, 255, 0.6);
  background: radial-gradient(circle at 0 0, rgba(71, 178, 255, 0.2), transparent 55%), rgba(16, 22, 41, 0.98);
  color: var(--gray-50);
  box-shadow: var(--shadow-sm);
}

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

.ozp-header__nav-link--cta:hover,
.ozp-header__nav-link--cta:focus-visible {
  background: linear-gradient(135deg, #2f8cff, #47b2ff);
  border-color: transparent;
  box-shadow: var(--shadow-md);
}

/* Mobile toggle */
.ozp-header__toggle {
  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, 0.18);
  background-color: rgba(5, 8, 20, 0.8);
  color: var(--gray-50);
  cursor: pointer;
  transition: background-color var(--transition-base), border-color var(--transition-base), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.ozp-header__toggle:hover,
.ozp-header__toggle:focus-visible {
  background-color: rgba(10, 15, 35, 0.95);
  border-color: rgba(71, 178, 255, 0.7);
  box-shadow: var(--shadow-sm);
}

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

/* Toggle animation when menu open */
.ozp-header__toggle[aria-expanded="true"] .ozp-header__toggle-bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
  width: 20px;
}

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

.ozp-header__toggle[aria-expanded="true"] .ozp-header__toggle-bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
  width: 20px;
}

/* Responsive behaviour */
@media (max-width: 768px) {
  .ozp-header__inner {
    padding-top: var(--space-3);
    padding-bottom: var(--space-3);
  }

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

  .ozp-header__nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: radial-gradient(circle at top left, rgba(47, 140, 255, 0.12), transparent 55%), var(--color-surface-alt);
    border-bottom: 1px solid var(--color-border-subtle);
    transform-origin: top;
    transform: scaleY(1);
  }

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

  .ozp-header__nav-link {
    width: 100%;
    padding-top: 0.45rem;
    padding-bottom: 0.45rem;
  }

  .ozp-header__nav-item--cta {
    width: 100%;
  }

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

  /* Hide menu by default when JS is enabled; no-js fallback: menu stays visible */
  .js-enabled .ozp-header__nav {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transform: scaleY(0.95);
    transition: max-height var(--transition-slow), opacity var(--transition-base), transform var(--transition-base);
  }

  .js-enabled .ozp-header__nav.is-open {
    max-height: 420px;
    opacity: 1;
    transform: scaleY(1);
  }
}

@media (min-width: 769px) {
  .ozp-header__nav {
    position: static;
    max-height: none !important;
    opacity: 1 !important;
    transform: none !important;
    background: transparent;
    border-bottom: 0;
  }
}