.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(16px);
  background: linear-gradient(to bottom, rgba(5, 7, 11, 0.95), rgba(5, 7, 11, 0.75));
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
  gap: 1.5rem;
}

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

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

.site-header__logo-mark {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: radial-gradient(circle at 0 0, rgba(255, 92, 60, 0.7), transparent 60%),
              radial-gradient(circle at 100% 100%, rgba(28, 125, 217, 0.7), transparent 60%),
              var(--color-background-soft);
  box-shadow: var(--shadow-soft);
}

.site-header__text {
  display: flex;
  flex-direction: column;
}

.site-header__name {
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.site-header__tagline {
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.site-header__nav {
  display: flex;
}

.site-header__nav-list {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-header__nav-item {
  position: relative;
}

.site-header__nav-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-soft);
  border: 1px solid transparent;
}

.site-header__nav-link:hover,
.site-header__nav-link:focus-visible {
  color: var(--color-text);
  border-color: rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.02);
}

.site-header__nav-item--cta .site-header__nav-link--cta {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-strong));
  color: #0b0e13;
  box-shadow: var(--shadow-soft);
}

.site-header__nav-item--cta .site-header__nav-link--cta:hover,
.site-header__nav-item--cta .site-header__nav-link--cta:focus-visible {
  color: #0b0e13;
  box-shadow: var(--shadow-elevated);
}

.site-header__nav-item--highlight .site-header__nav-link--outline {
  border-color: var(--color-border-strong);
  background: rgba(255, 255, 255, 0.02);
}

.site-header__nav-item--highlight .site-header__nav-link--outline:hover,
.site-header__nav-item--highlight .site-header__nav-link--outline:focus-visible {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
}

/* Mobile toggle */
.site-header__toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.25rem;
  cursor: pointer;
  background: rgba(7, 11, 16, 0.95);
  color: var(--color-text);
}

.site-header__toggle-bar {
  width: 1.3rem;
  height: 2px;
  border-radius: 999px;
  background: var(--color-text);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

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

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

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

/* Mobile layout */
@media (max-width: 880px) {
  .site-header__inner {
    padding-top: 0.5rem;
    padding-bottom: 0.5rem;
  }

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

  .site-header__nav {
    position: fixed;
    inset: 0 0 auto 0;
    top: 3.5rem;
    background: rgba(5, 7, 11, 0.98);
    border-top: 1px solid rgba(255, 255, 255, 0.04);
    transform: translateY(-110%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-normal), opacity var(--transition-normal), visibility var(--transition-normal);
  }

  .site-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem 1.5rem 1.5rem;
  }

  .site-header__nav-link {
    width: 100%;
    justify-content: flex-start;
    padding: 0.6rem 0.75rem;
    font-size: 0.8rem;
  }

  .site-header__nav--open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
}

/* Larger screens */
@media (min-width: 881px) {
  .site-header__nav {
    position: static;
    transform: none !important;
    opacity: 1 !important;
    visibility: visible !important;
  }
}

.site-header--menu-open {
  overflow: hidden;
}