.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(18px);
  background: linear-gradient(to bottom, rgba(12, 10, 20, 0.98), rgba(12, 10, 20, 0.9));
  border-bottom: 1px solid rgba(148, 163, 184, 0.22);
}

.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-block: 14px;
}

.site-header-brand {
  text-decoration: none;
}

.site-nav {
  display: flex;
  align-items: center;
}

.site-nav-list {
  display: flex;
  align-items: center;
  gap: 22px;
  margin: 0;
  padding: 0;
}

.site-nav-link {
  font-family: var(--ff-body);
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  padding-block: 4px;
  position: relative;
}

.site-nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -6px;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-cyan), var(--color-primary));
  transform-origin: center;
  transform: scaleX(0);
  transition: transform 180ms ease-out;
}

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

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

.site-header-cta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-play-cta {
  white-space: nowrap;
}

.nav-toggle {
  width: 40px;
  height: 40px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.5);
  background: radial-gradient(circle at 0 0, rgba(139, 92, 246, 0.6), transparent 55%), rgba(15, 23, 42, 0.95);
  justify-content: center;
  align-items: center;
  gap: 4px;
  padding: 0;
  cursor: pointer;
  transition: border-color var(--transition-base), background var(--transition-base), box-shadow var(--transition-base), transform var(--transition-fast);
}

.nav-toggle-bar {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: var(--color-text);
  transition: transform 180ms ease-out, opacity 160ms ease-out;
}

.nav-toggle:focus-visible {
  outline: 2px solid var(--color-cyan);
  outline-offset: 3px;
}

.nav-toggle.is-active {
  border-color: var(--color-cyan);
  box-shadow: var(--shadow-glow-cyan);
}

.nav-toggle.is-active .nav-toggle-bar:nth-child(1) {
  transform: translateY(4px) rotate(45deg);
}

.nav-toggle.is-active .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-active .nav-toggle-bar:nth-child(3) {
  transform: translateY(-4px) rotate(-45deg);
}

@media (max-width: 900px) {
  .site-nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    background: radial-gradient(circle at 0 0, rgba(124, 58, 237, 0.28), transparent 45%), radial-gradient(circle at 100% 100%, rgba(6, 182, 212, 0.28), transparent 55%), rgba(12, 10, 20, 0.98);
    border-bottom: 1px solid rgba(148, 163, 184, 0.3);
    transform-origin: top;
    transform: scaleY(0.9);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity var(--transition-base), transform var(--transition-base), visibility 0s linear var(--transition-base);
  }

  .site-nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding: 12px 16px 16px;
  }

  .site-nav-link {
    padding-block: 8px;
  }

  .site-header-cta {
    margin-left: auto;
  }

  .site-header-inner {
    padding-block: 10px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-header-inner {
    position: relative;
    z-index: 41;
  }

  .site-header--nav-open .site-nav {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: scaleY(1);
    transition: opacity var(--transition-base), transform var(--transition-base);
  }
}

@media (min-width: 901px) {
  .nav-toggle {
    display: none;
  }
}

@media (max-width: 640px) {
  .site-header-cta {
    display: none;
  }
}