.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  backdrop-filter: blur(22px);
  -webkit-backdrop-filter: blur(22px);
  background: linear-gradient(to bottom, rgba(5, 8, 22, 0.96), rgba(5, 8, 22, 0.9), transparent);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  height: var(--header-height-desktop);
}

.site-header__brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-text);
}

.site-header__logo {
  width: 40px;
  height: 40px;
  border-radius: 1.2rem;
  background:
    radial-gradient(circle at 0% 0%, rgba(255, 122, 26, 0.9), rgba(255, 209, 102, 0.9)),
    radial-gradient(circle at 100% 100%, rgba(47, 123, 255, 0.9), rgba(75, 141, 255, 0.9));
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.32), 0 18px 35px rgba(0, 0, 0, 0.85);
}

.site-header__title-group {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.site-header__title-main {
  font-family: var(--font-display);
  font-weight: 650;
  font-size: 0.95rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.site-header__title-sub {
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

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

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

.site-header__nav-item {
  flex: 0 0 auto;
}

.site-header__nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-text-soft);
  padding-block: 0.25rem;
}

.site-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, #ff7a1a, #ffd166, #2f7bff);
  transform-origin: center;
  transform: scaleX(0);
  opacity: 0;
  transition: transform var(--transition-bounce), opacity var(--transition-fast);
}

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

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

.site-header__nav-link--active {
  color: var(--color-text);
}

.site-header__nav-link--active::after {
  transform: scaleX(1);
  opacity: 1;
}

.site-header__cta-group {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.site-header__toggle {
  display: none;
  position: relative;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: radial-gradient(circle at 0% 0%, rgba(255, 122, 26, 0.35), transparent 55%), rgba(5, 8, 22, 0.95);
  align-items: center;
  justify-content: center;
  padding: 0;
}

.site-header__toggle:focus-visible {
  outline: 2px solid var(--color-secondary);
  outline-offset: 2px;
}

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

.site-header__toggle-bar + .site-header__toggle-bar {
  margin-top: 4px;
}

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

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

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

.site-header__mobile-nav {
  position: absolute;
  inset-inline: 0;
  top: var(--header-height-mobile);
  transform-origin: top;
  transform: scaleY(0.9);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  background: linear-gradient(to bottom, rgba(5, 8, 22, 0.98), rgba(5, 8, 22, 0.96));
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.75);
  transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
}

.site-header--mobile-open + .site-header__mobile-nav,
.site-header.site-header--mobile-open .site-header__mobile-nav {
  transform: scaleY(1);
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.site-header__mobile-nav-list {
  list-style: none;
  padding-block: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.site-header__mobile-nav-item {
  width: 100%;
}

.site-header__mobile-nav-link {
  display: block;
  width: 100%;
  padding-block: 0.7rem;
  padding-inline: 0.25rem;
  font-size: var(--font-size-sm);
  color: var(--color-text-soft);
}

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

.site-header__mobile-nav-item--accent {
  margin-top: var(--space-sm);
}

@media (max-width: 991.98px) {
  .site-header__inner {
    height: var(--header-height-mobile);
  }

  .site-header__nav {
    display: none;
  }

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

@media (max-width: 767.98px) {
  .site-header__title-sub {
    display: none;
  }

  .site-header__inner {
    gap: var(--space-sm);
  }

  .site-header__cta-group .button {
    display: none;
  }
}

@media (min-width: 992px) {
  .site-header__mobile-nav {
    display: none;
  }
}