.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(16px);
  background: linear-gradient(to bottom, rgba(6, 8, 20, 0.96), rgba(6, 8, 20, 0.9));
  border-bottom: 1px solid var(--color-border-subtle);
}

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

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

.site-header__logo-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text);
}

.site-header__logo-mark {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-full);
  background: radial-gradient(circle at 30% 0, #ff7a9a 0, var(--color-primary) 40%, var(--color-primary-strong) 100%);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: 700;
}

.site-header__logo-text {
  font-family: var(--font-display);
  font-size: var(--font-size-lg);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.site-header__nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-4);
}

.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);
  font-weight: 500;
  color: var(--color-text-muted);
  padding-block: 0.25rem;
}

.site-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  border-radius: var(--radius-full);
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-strong));
  transition: width var(--transition-base);
}

.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 {
  width: 100%;
}

.site-header__cta-wrap {
  margin-left: var(--space-2);
}

.site-header__cta {
  font-size: var(--font-size-xs);
}

.site-header__toggle {
  display: none;
  position: relative;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border-subtle);
  background-color: rgba(12, 16, 32, 0.9);
  cursor: pointer;
  appearance: none;
  padding: 0;
  flex: 0 0 auto;
  color: var(--color-text);
}

.site-header__toggle-bar {
  position: absolute;
  left: 50%;
  width: 18px;
  height: 2px;
  border-radius: var(--radius-full);
  background-color: currentColor;
  transform-origin: center;
  transition: transform var(--transition-base), opacity var(--transition-base), width var(--transition-base), top var(--transition-base);
}

.site-header__toggle-bar:nth-child(1) {
  top: calc(50% - 6px);
  transform: translateX(-50%);
}

.site-header__toggle-bar:nth-child(2) {
  top: 50%;
  width: 14px;
  transform: translate(-50%, -50%);
}

.site-header__toggle-bar:nth-child(3) {
  top: calc(50% + 6px);
  transform: translateX(-50%);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar:nth-child(1) {
  top: 50%;
  transform: translate(-50%, -50%) rotate(45deg);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar:nth-child(2) {
  opacity: 0;
  width: 0;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar:nth-child(3) {
  top: 50%;
  transform: translate(-50%, -50%) rotate(-45deg);
}

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

  .site-header__nav {
    position: fixed;
    inset-inline: 0;
    top: 64px;
    background: radial-gradient(circle at top, rgba(12, 16, 32, 0.98), rgba(6, 8, 20, 0.98));
    border-top: 1px solid var(--color-border-subtle);
    padding: var(--space-4) var(--space-4) var(--space-6);
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
    max-height: 0;
    opacity: 0;
    visibility: hidden;
    overflow: hidden;
    transform: translateY(-8px);
    transition: max-height var(--transition-slow), opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
  }

  .site-header__nav--open {
    max-height: 420px;
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

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

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

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

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

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