.gv-header {
  position: sticky;
  top: 0;
  z-index: 60;
  backdrop-filter: blur(18px);
  background: radial-gradient(circle at top, rgba(99, 102, 241, 0.22) 0, rgba(5, 7, 17, 0.98) 36%, rgba(5, 7, 17, 0.98) 100%);
  border-bottom: 1px solid rgba(148, 163, 253, 0.18);
}

.gv-header__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-3);
  gap: var(--space-3);
}

.gv-header__brand {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.gv-header__logo-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text);
}

.gv-header__logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 30% 60% 40% 70%;
  background: conic-gradient(from 210deg, #22c55e, #0ea5e9, #6366f1, #f97316, #22c55e);
  box-shadow: 0 0 0 1px rgba(148, 163, 253, 0.45), 0 0 18px rgba(99, 102, 241, 0.75);
  position: relative;
  overflow: hidden;
}

.gv-header__logo-mark::after {
  content: "";
  position: absolute;
  inset: 22%;
  border-radius: inherit;
  background: radial-gradient(circle at 20% 20%, rgba(249, 250, 251, 0.75), transparent 55%);
  mix-blend-mode: screen;
}

.gv-header__logo-text {
  font-size: var(--font-size-lg);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text);
}

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

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

.gv-header__nav-link {
  position: relative;
  padding-inline: 0.35rem;
  padding-block: 0.3rem;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-soft);
  text-decoration: none;
  transition: color var(--transition-base), opacity var(--transition-fast);
}

.gv-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0.35rem;
  right: 0.35rem;
  bottom: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, #22c55e, #0ea5e9, #6366f1);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--transition-base);
}

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

.gv-header__nav-link:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
  border-radius: var(--radius-full);
}

.gv-header__nav-link:hover::after {
  transform: scaleX(1);
}

.gv-header__cta-group {
  display: flex;
  align-items: center;
}

.gv-header__cta-primary {
  font-size: var(--font-size-xs);
  padding-inline: 1.1rem;
}

.gv-header__menu-toggle {
  display: none;
  align-items: center;
  gap: var(--space-2);
  padding: 0.35rem 0.7rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border-subtle);
  background: radial-gradient(circle at top, rgba(99, 102, 241, 0.24), rgba(20, 24, 39, 0.96));
  color: var(--color-text);
}

.gv-header__menu-toggle-inner {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
}

.gv-header__menu-bar {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background-color: var(--color-text);
  transition: transform var(--transition-base), opacity var(--transition-base), width var(--transition-base);
}

.gv-header__menu-label {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.gv-header__menu-toggle:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
}

.gv-header--menu-open .gv-header__menu-bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.gv-header--menu-open .gv-header__menu-bar:nth-child(2) {
  opacity: 0;
  width: 0;
}

.gv-header--menu-open .gv-header__menu-bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

@media (max-width: 900px) {
  .gv-header__menu-toggle {
    display: inline-flex;
  }

  .gv-header__nav {
    position: fixed;
    inset: 64px 0 auto 0;
    padding: var(--space-4) var(--space-4) var(--space-6);
    background: radial-gradient(circle at top, rgba(99, 102, 241, 0.72), rgba(3, 4, 12, 0.99));
    border-bottom: 1px solid rgba(148, 163, 253, 0.26);
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-3);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    visibility: hidden;
    transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
  }

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

  .gv-header__nav-link {
    width: 100%;
    padding-block: 0.55rem;
    font-size: var(--font-size-base);
  }

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

  .gv-header__cta-group {
    justify-content: flex-start;
  }

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

@media (max-width: 480px) {
  .gv-header__logo-text {
    font-size: var(--font-size-base);
  }

  .gv-header__container {
    padding-block: var(--space-2);
  }
}

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

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