.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: linear-gradient(to bottom, rgba(2, 4, 10, 0.98), rgba(2, 4, 10, 0.9));
  border-bottom: 1px solid var(--color-border-subtle);
  backdrop-filter: blur(18px);
}

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

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

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

.site-header__logo-mark {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, #ffde6b 0, #f5c542 35%, #050814 72%);
  box-shadow: 0 0 18px rgba(245, 197, 66, 0.75);
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.site-header__logo-chip {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px dashed rgba(5, 8, 20, 0.9);
  background: radial-gradient(circle at 20% 20%, #fff 0, #ffde6b 45%, #f5c542 100%);
}

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

.site-header__site-name {
  font-family: var(--font-display);
  font-size: var(--font-size-lg);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.site-header__tagline {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

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

.site-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.site-header__nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding-inline: 0.35rem;
  padding-block: 0.35rem;
  font-size: var(--font-size-sm);
  color: var(--color-text-soft);
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

.site-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -0.1rem;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(255, 79, 106, 0), rgba(245, 197, 66, 0.9), rgba(73, 209, 255, 0));
  opacity: 0;
  transform: scaleX(0.5);
  transform-origin: center;
  transition: opacity var(--transition-base), transform var(--transition-base);
}

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

.site-header__nav-item--highlight .site-header__nav-link--cta {
  padding-inline: 1rem;
  padding-block: 0.55rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(245, 197, 66, 0.8);
  background: radial-gradient(circle at top, rgba(245, 197, 66, 0.16), rgba(5, 8, 20, 0.96));
  color: var(--color-primary-strong);
  box-shadow: 0 0 16px rgba(245, 197, 66, 0.35);
}

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

.site-header__nav-item--highlight .site-header__nav-link--cta:hover {
  background: linear-gradient(135deg, #f5c542 0%, #ff8a3d 45%, #ff4f6a 100%);
  color: #050814;
}

@media (min-width: 769px) {
  .site-header__nav-item::marker {
    display: none;
  }
}

.site-header__nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(5, 8, 20, 0.9);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  color: var(--color-text);
}

.site-header__nav-toggle-bar {
  width: 20px;
  height: 2px;
  border-radius: 999px;
  background-color: var(--color-text);
  transition: transform var(--transition-base), opacity var(--transition-base), background-color var(--transition-base);
}

.site-header__nav-toggle.is-open .site-header__nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.site-header__nav-toggle.is-open .site-header__nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.site-header__nav-toggle.is-open .site-header__nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 768px) {
  .site-header__nav-toggle {
    display: inline-flex;
  }

  .site-header__nav {
    position: fixed;
    inset-inline: 0;
    top: 56px;
    background: rgba(2, 4, 10, 0.98);
    border-bottom: 1px solid var(--color-border-subtle);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition-base), opacity var(--transition-base);
  }

  .site-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-4) var(--container-padding-x) var(--space-5);
    gap: var(--space-2);
  }

  .site-header__nav-link {
    padding-block: 0.6rem;
    font-size: var(--font-size-sm);
  }

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

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