.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  backdrop-filter: blur(18px);
  background: radial-gradient(circle at top left, rgba(255, 51, 102, 0.18), transparent 60%),
    linear-gradient(to bottom, rgba(5, 6, 10, 0.96), rgba(5, 6, 10, 0.85));
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: var(--space-3);
}

/* Brand */
.site-header__brand {
  display: flex;
  align-items: center;
}

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

.site-header__logo-mark {
  width: 36px;
  height: 36px;
  border-radius: 12px;
  background: radial-gradient(circle at 20% 0, #ff7a9a, #ff3366 40%, #2f5bff 100%);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: 1rem;
  box-shadow: var(--shadow-soft);
}

.site-header__logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.site-header__logo-name {
  font-family: var(--font-display);
  font-size: 1.2rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-header__logo-tagline {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

/* Nav */
.site-header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.site-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  list-style: none;
  margin: 0;
  padding: 0;
}

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

.site-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.35rem;
  width: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent-blue));
  transition: width var(--transition-normal);
}

.site-header__nav-link:hover,
.site-header__nav-link:focus-visible {
  color: #ffffff;
}

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

.site-header__cta-wrap {
  margin-left: var(--space-4);
}

.site-header__cta {
  font-size: 0.75rem;
  padding-inline: 1.4rem;
}

/* Mobile toggle */
.site-header__toggle {
  display: none;
  position: relative;
  width: 40px;
  height: 32px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(5, 6, 10, 0.8);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
  padding: 0;
}

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

.site-header__toggle:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

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

  .site-header__nav {
    position: fixed;
    inset: 0;
    padding: var(--space-16) var(--space-4) var(--space-6);
    background: radial-gradient(circle at top, rgba(255, 51, 102, 0.22), transparent 55%),
      rgba(5, 6, 10, 0.98);
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    gap: var(--space-6);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition-normal), opacity var(--transition-normal);
  }

  .site-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }

  .site-header__nav-link {
    font-size: var(--font-size-lg);
  }

  .site-header__cta-wrap {
    width: 100%;
    margin-left: 0;
  }

  .site-header__cta {
    width: 100%;
    justify-content: center;
  }

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

  .site-header--menu-open .site-header__toggle-bar:nth-child(1) {
    transform: translateY(4px) rotate(45deg);
    width: 20px;
  }

  .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(-4px) rotate(-45deg);
    width: 20px;
  }
}

@media (max-width: 520px) {
  .site-header__logo-tagline {
    display: none;
  }
}

/* Reduce motion preference */
@media (prefers-reduced-motion: reduce) {
  .site-header,
  .site-header__nav,
  .site-header__toggle-bar {
    transition: none !important;
  }
}