.vs-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: linear-gradient(to bottom, rgba(5, 6, 8, 0.96), rgba(5, 6, 8, 0.9));
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--color-border-subtle);
}

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

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

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

.vs-header__logo-mark {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background:
    radial-gradient(circle at 30% 10%, rgba(255, 255, 255, 0.35), transparent 55%),
    radial-gradient(circle at 80% 80%, rgba(184, 31, 59, 0.7), transparent 60%),
    radial-gradient(circle at 10% 90%, rgba(217, 178, 108, 0.7), transparent 65%),
    #050608;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-soft);
  position: relative;
  overflow: hidden;
}

.vs-header__logo-chip {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid rgba(217, 178, 108, 0.9);
  background: radial-gradient(circle at 30% 20%, #ffffff, #b2b2b2 35%, #2a2a30 65%, #050608 100%);
  box-shadow: 0 0 0 3px rgba(184, 31, 59, 0.65);
}

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

.vs-header__logo-title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.vs-header__logo-subtitle {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--color-text-muted);
}

/* Nav */
.vs-header__nav {
  display: flex;
  align-items: center;
}

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

.vs-header__nav-link {
  position: relative;
  font-size: var(--text-sm);
  color: var(--color-text-soft);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.vs-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.4rem;
  width: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent-gold));
  transition: width var(--transition-base);
}

.vs-header__nav-link:hover::after,
.vs-header__nav-link:focus-visible::after {
  width: 100%;
}

.vs-header__nav-item--cta {
  margin-left: var(--space-2);
}

.vs-header__cta {
  white-space: nowrap;
}

/* Toggle button (mobile) */
.vs-header__toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 44px;
  height: 36px;
  padding: 0 10px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: radial-gradient(circle at 0 0, rgba(184, 31, 59, 0.4), transparent 55%),
              rgba(5, 6, 8, 0.95);
  cursor: pointer;
  color: var(--color-text);
}

.vs-header__toggle-bar {
  width: 100%;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-accent-gold), var(--color-primary));
  transition: transform var(--transition-base), opacity var(--transition-base), translate var(--transition-base);
}

.vs-header__toggle[aria-expanded="true"] .vs-header__toggle-bar:first-child {
  transform: rotate(45deg) translate(3px, 3px);
}

.vs-header__toggle[aria-expanded="true"] .vs-header__toggle-bar:last-child {
  transform: rotate(-45deg) translate(4px, -4px);
}

/***************************
 * Responsive behaviour
 ***************************/
@media (max-width: 767px) {
  .vs-header__nav {
    position: fixed;
    inset: 64px 0 auto 0;
    background: radial-gradient(circle at 0 0, rgba(184, 31, 59, 0.32), transparent 60%),
                radial-gradient(circle at 100% 0, rgba(217, 178, 108, 0.24), transparent 60%),
                rgba(5, 6, 8, 0.98);
    border-bottom: 1px solid var(--color-border-subtle);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-base), opacity var(--transition-base), visibility var(--transition-base);
  }

  .vs-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-4) var(--space-4) var(--space-6);
  }

  .vs-header__nav-item--cta {
    width: 100%;
    margin-left: 0;
    margin-top: var(--space-2);
  }

  .vs-header__nav-item--cta .vs-header__cta {
    width: 100%;
    justify-content: center;
  }

  .vs-header__toggle {
    margin-left: auto;
  }

  .vs-header__nav.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    padding: 20px;
  }
}

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

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .vs-header__nav,
  .vs-header__toggle-bar {
    transition: none;
  }
}