/* Header styles for Lunar Deck */

.ld-header {
  position: sticky;
  top: 0;
  z-index: 40;
}

.ld-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);
}

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

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

.ld-header__logo-mark {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.9rem;
  background: radial-gradient(circle at 30% 20%, #4f46e5, transparent 55%),
              radial-gradient(circle at 70% 80%, #0ea5e9, transparent 55%),
              #020617;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.08em;
  font-size: 0.9rem;
  border: 1px solid rgba(148, 163, 184, 0.6);
  box-shadow: var(--shadow-sm);
}

.ld-header__site-text {
  display: flex;
  flex-direction: column;
}

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

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

/* Navigation */

.ld-header__nav {
  display: flex;
}

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

.ld-header__nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  padding: 0.2rem 0;
}

.ld-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.3rem;
  width: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, #4f46e5, #22d3ee);
  transition: width var(--transition-base);
}

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

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

.ld-header__nav-item--cta .ld-header__nav-link--cta {
  padding: 0.45rem 1rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(79, 70, 229, 0.8);
  background: radial-gradient(circle at top left, rgba(79, 70, 229, 0.5), transparent 55%),
              rgba(15, 23, 42, 0.9);
  color: var(--color-text);
  box-shadow: var(--shadow-sm);
}

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

.ld-header__nav-item--cta .ld-header__nav-link--cta:hover,
.ld-header__nav-item--cta .ld-header__nav-link--cta:focus-visible {
  border-color: var(--color-primary-strong);
  background: radial-gradient(circle at top left, rgba(79, 70, 229, 0.7), transparent 60%),
              rgba(15, 23, 42, 1);
}

/* Mobile toggle */

.ld-header__toggle {
  display: none;
  position: relative;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border-subtle);
  background: rgba(15, 23, 42, 0.96);
  align-items: center;
  justify-content: center;
  padding: 0;
  cursor: pointer;
}

.ld-header__toggle-line {
  position: absolute;
  width: 1.3rem;
  height: 2px;
  border-radius: 999px;
  background-color: var(--color-text);
  transition: transform var(--transition-base), opacity var(--transition-base), top var(--transition-base), bottom var(--transition-base);
}

.ld-header__toggle-line:nth-child(1) {
  top: 0.8rem;
}

.ld-header__toggle-line:nth-child(2) {
  top: 1.2rem;
}

.ld-header__toggle-line:nth-child(3) {
  bottom: 0.8rem;
}

.ld-header__toggle[aria-expanded="true"] .ld-header__toggle-line:nth-child(1) {
  top: 1.2rem;
  transform: rotate(45deg);
}

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

.ld-header__toggle[aria-expanded="true"] .ld-header__toggle-line:nth-child(3) {
  bottom: 1.2rem;
  transform: rotate(-45deg);
}

/* Mobile layout */

@media (max-width: 768px) {
  .ld-header__inner {
    padding-top: var(--space-2);
    padding-bottom: var(--space-2);
  }

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

  .ld-header__nav {
    position: fixed;
    inset: 3.5rem 0 0 0;
    background: radial-gradient(circle at top, rgba(79, 70, 229, 0.18), transparent 60%),
                rgba(5, 8, 22, 0.98);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-slow), opacity var(--transition-slow), visibility var(--transition-slow);
  }

  .ld-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-6) var(--space-4) var(--space-8);
    gap: var(--space-3);
  }

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

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

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

@media (min-width: 769px) {
  .ld-header__nav {
    position: static;
    transform: none !important;
    opacity: 1 !important;
    visibility: visible !important;
  }
}