.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(22px);
  -webkit-backdrop-filter: blur(22px);
  background: linear-gradient(to bottom, rgba(5, 5, 9, 0.96), rgba(5, 5, 9, 0.92), rgba(5, 5, 9, 0.85));
  border-bottom: 1px solid rgba(31, 41, 55, 0.9);
}

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

.site-header__brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-width: 0;
}

.site-header__logo-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--gray-50);
}

.site-header__logo-mark {
  width: 36px;
  height: 36px;
  border-radius: 999px;
  background:
    radial-gradient(circle at 30% 0, rgba(248, 250, 252, 0.6), transparent 55%),
    conic-gradient(from 210deg, #a855ff, #6366f1, #111827, #a855ff);
  box-shadow: 0 0 0 1px rgba(148, 163, 253, 0.5), 0 8px 25px rgba(0, 0, 0, 0.8);
}

.site-header__title {
  display: flex;
  flex-direction: column;
  font-family: var(--font-display);
  font-size: var(--font-size-lg);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-header__subtitle {
  font-size: var(--font-size-xs);
  text-transform: none;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
}

.site-header__nav {
  margin-left: auto;
}

.site-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  list-style: none;
}

.site-header__nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 0.35rem 0.1rem;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-silver-soft);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.site-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, #a855ff, #6366f1);
  transform-origin: center;
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

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

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

.site-header__nav-item--cta .site-header__nav-link {
  padding-inline: 1.1rem;
  padding-block: 0.45rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(148, 163, 253, 0.7);
  background: radial-gradient(circle at 20% 0, rgba(248, 250, 252, 0.4), transparent 60%), linear-gradient(120deg, #a855ff, #6366f1);
  color: #020617;
  box-shadow: 0 0 0 1px rgba(15, 23, 42, 0.9), var(--shadow-soft);
}

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

.site-header__nav-item--cta .site-header__nav-link:hover,
.site-header__nav-item--cta .site-header__nav-link:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.95);
}

.site-header__toggle {
  display: none;
  position: relative;
  width: 40px;
  height: 40px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 253, 0.7);
  background: radial-gradient(circle at 20% 0, rgba(148, 163, 253, 0.2), transparent 60%), rgba(15, 23, 42, 0.9);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  color: var(--gray-50);
}

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

.site-header__toggle:focus-visible::after {
  content: "";
}

.site-header--menu-open .site-header__toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.site-header--menu-open .site-header__toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.site-header__backdrop {
  position: fixed;
  inset: 0;
  /*background: rgba(0, 0, 0, 0.6);*/
  /*backdrop-filter: blur(4px);*/
  /*-webkit-backdrop-filter: blur(4px);*/
  z-index: 40;
}

@media (max-width: 900px) {
  .site-header__toggle {
    display: inline-flex;
  }

  .site-header__nav {
    position: fixed;
    inset-block-start: 64px;
    inset-inline: 0;
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-base), transform var(--transition-base);
    z-index: 45;
  }

  .site-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    margin: var(--space-3);
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    background: radial-gradient(circle at 0 0, rgba(148, 163, 253, 0.2), transparent 60%), rgba(12, 10, 24, 0.98);
    box-shadow: var(--shadow-soft-lg);
  }

  .site-header__nav-link {
    width: 100%;
    padding-block: 0.6rem;
  }

  .site-header__nav-item--cta .site-header__nav-link {
    width: 100%;
    justify-content: center;
    text-align: center;
  }

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

  .site-header--menu-open .site-header__backdrop[hidden] {
    display: block;
  }
}

@media (max-width: 520px) {
  .site-header__title {
    font-size: var(--font-size-md);
  }

  .site-header__subtitle {
    display: none;
  }
}

.site-header__nav-link:focus-visible,
.site-header__toggle:focus-visible {
  outline: 2px solid transparent;
}

.site-header__nav-link:focus-visible::before,
.site-header__toggle:focus-visible::before {
  content: "";
  position: absolute;
  inset: -4px;
  border-radius: inherit;
  padding: 1px;
  background: var(--gradient-outline);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

@media (min-width: 901px) {
  .site-header__nav[hidden] {
    display: block !important;
  }

  .site-header__nav {
    display: block !important;
    opacity: 1 !important;
    pointer-events: auto !important;
    transform: none !important;
  }
}