/* Header layout and branding */
.cwb-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(18px);
  background: linear-gradient(to bottom, rgba(5, 8, 12, 0.96), rgba(5, 8, 12, 0.9));
  border-bottom: 1px solid var(--color-border-subtle);
}

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

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

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

.cwb-header__logo-mark {
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 0.9rem;
  background: radial-gradient(circle at 20% 0, #3b82f6, transparent 55%),
              radial-gradient(circle at 80% 100%, #1d6fd8, transparent 60%),
              #05080c;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 0 0 1px rgba(13, 25, 49, 0.7), var(--shadow-soft);
  position: relative;
  overflow: hidden;
}

.cwb-header__logo-mark::after {
  content: "";
  position: absolute;
  inset: 40% -40%;
  background: linear-gradient(120deg, rgba(255, 255, 255, 0.12), transparent 55%);
  transform: rotate(-18deg);
}

.cwb-header__brand-text {
  display: flex;
  flex-direction: column;
}

.cwb-header__site-name {
  font-size: var(--text-lg);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 600;
}

.cwb-header__site-tagline {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

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

.cwb-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.cwb-header__nav-item {
  list-style: none;
}

.cwb-header__nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-pill);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  transition: color var(--transition-normal), background-color var(--transition-normal), box-shadow var(--transition-normal);
}

.cwb-header__nav-link::after {
  content: "";
  position: absolute;
  left: 1rem;
  right: 1rem;
  bottom: 0.2rem;
  height: 2px;
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
  opacity: 0;
  transform: scaleX(0.6);
  transform-origin: center;
  transition: opacity var(--transition-normal), transform var(--transition-normal);
}

.cwb-header__nav-link:hover {
  color: var(--color-text);
  background-color: rgba(255, 255, 255, 0.02);
}

.cwb-header__nav-link:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

.cwb-header__nav-link--highlight {
  background: radial-gradient(circle at 10% 0, rgba(255, 255, 255, 0.1), transparent 55%),
              linear-gradient(120deg, #1d6fd8, #233a6b);
  color: #ffffff;
  box-shadow: 0 10px 25px rgba(8, 21, 44, 0.8);
}

.cwb-header__nav-link--highlight:hover {
  background: linear-gradient(120deg, #2a7ff0, #274281);
}

.cwb-header__nav-link--highlight::after {
  display: none;
}

.cwb-header__nav-link[aria-current="page"] {
  color: var(--color-text);
}

.cwb-header__nav-link[aria-current="page"]::after {
  opacity: 1;
  transform: scaleX(1);
}

/* Header toggle (mobile) */
.cwb-header__toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 999px;
  border: 1px solid var(--color-border-subtle);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.25rem;
  cursor: pointer;
  background-color: rgba(11, 16, 23, 0.95);
  color: var(--color-text);
}

.cwb-header__toggle-bar {
  width: 1.3rem;
  height: 2px;
  border-radius: 999px;
  background-color: var(--color-gray-200);
  transition: transform var(--transition-normal), opacity var(--transition-normal), background-color var(--transition-normal);
}

.cwb-header__toggle:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

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

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

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

/* Responsive behavior */
@media (max-width: 864px) {
  .cwb-header__inner {
    align-items: center;
  }

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

  .cwb-header__nav {
    position: fixed;
    inset: 3.75rem 0 auto 0;
    z-index: 30;
    background: radial-gradient(circle at top left, rgba(61, 122, 221, 0.18), transparent 60%),
                rgba(5, 8, 12, 0.98);
    border-bottom: 1px solid var(--color-border-subtle);
    transform-origin: top;
    transform: scaleY(0.98);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-slow), transform var(--transition-slow), visibility var(--transition-slow);
  }

  .cwb-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-4);
    gap: var(--space-1);
  }

  .cwb-header__nav-link {
    width: 100%;
    justify-content: flex-start;
    padding: 0.65rem 0.85rem;
  }

  .cwb-header__nav-item--support {
    margin-top: var(--space-2);
    border-top: 1px solid rgba(255, 255, 255, 0.04);
    padding-top: var(--space-2);
    width: 100%;
  }

  .cwb-header--nav-open .cwb-header__nav {
    opacity: 1;
    visibility: visible;
    transform: scaleY(1);
  }
}

@media (max-width: 520px) {
  .cwb-header__site-tagline {
    display: none;
  }
}

@media (min-width: 865px) {
  .cwb-header__nav {
    position: static;
    opacity: 1 !important;
    visibility: visible !important;
    transform: none !important;
  }
}