/* Header-specific styles building on base.css */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(18px);
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.96), rgba(15, 23, 42, 0.82), transparent);
  border-bottom: 1px solid rgba(30, 64, 175, 0.7);
}

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

/* Logo */
.site-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
}

.site-logo-mark {
  position: relative;
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 999px;
  background: radial-gradient(circle at 30% 20%, rgba(56, 189, 248, 0.8), rgba(15, 23, 42, 1));
  box-shadow: 0 0 0 1px rgba(56, 189, 248, 0.4), 0 0 22px rgba(56, 189, 248, 0.55);
}

.site-logo-orbit {
  position: absolute;
  inset: 0.25rem;
  border-radius: inherit;
  border: 1px dashed rgba(148, 163, 184, 0.7);
}

.site-logo-core {
  position: absolute;
  inset: 0.65rem;
  border-radius: inherit;
  background: radial-gradient(circle at 50% 30%, #e5e7eb, #22c55e);
}

.site-logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.site-logo-title {
  font-family: var(--font-display);
  font-size: 0.98rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.site-logo-subtitle {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--color-text-muted);
}

/* Navigation */
.site-nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.site-nav-list {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
}

.site-nav-link {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-text-muted);
  position: relative;
  padding-block: 0.15rem;
}

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

.site-nav-link:hover,
.site-nav-link[aria-current="page"] {
  color: var(--color-gray-100);
}

.site-nav-link:hover::after,
.site-nav-link[aria-current="page"]::after {
  width: 100%;
}

.site-nav-cta-wrapper {
  margin-left: 0.5rem;
}

.site-nav-cta {
  padding-inline: 1rem;
  padding-block: 0.45rem;
  font-size: 0.7rem;
}

/* Mobile nav toggle */
.site-nav-toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.55rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(55, 65, 81, 0.9);
  background: radial-gradient(circle at top left, rgba(15, 23, 42, 0.98), rgba(15, 23, 42, 0.9));
  color: var(--color-text-soft);
}

.site-nav-toggle-box {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.2rem;
}

.site-nav-toggle-line {
  width: 1.15rem;
  height: 1px;
  border-radius: 999px;
  background: var(--color-gray-300);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.site-nav-toggle-text {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

.site-header--nav-open .site-nav-toggle-line:nth-child(1) {
  transform: translateY(0.3rem) rotate(45deg);
}

.site-header--nav-open .site-nav-toggle-line:nth-child(2) {
  opacity: 0;
}

.site-header--nav-open .site-nav-toggle-line:nth-child(3) {
  transform: translateY(-0.3rem) rotate(-45deg);
}

/* Overlay for mobile menu */
.site-nav-overlay {
  position: fixed;
  inset: 0;
  background: radial-gradient(circle at top, rgba(15, 23, 42, 0.98), rgba(15, 23, 42, 0.96));
  z-index: 30;
}

/* Responsive behavior */
@media (max-width: 900px) {
  .site-nav-toggle {
    display: inline-flex;
    z-index: 9999;
  }

  .site-nav {
    position: fixed;
    inset: 0 0 auto 0;
    top: 3.25rem;
    flex-direction: column;
    align-items: flex-start;
    gap: 1.25rem;
    padding: 1.25rem 1.5rem 1.75rem;
    background: radial-gradient(circle at top, rgba(15, 23, 42, 0.99), rgba(15, 23, 42, 0.96));
    border-bottom: 1px solid rgba(30, 64, 175, 0.7);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition-base), opacity var(--transition-base);
  }

  .site-header--nav-open #primary-navigation {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .site-nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.85rem;
  }

  .site-nav-cta-wrapper {
    width: 100%;
  }

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

  .site-nav-overlay[hidden] {
    display: none !important;
  }
}

@media (max-width: 600px) {
  .site-logo-subtitle {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-nav,
  .site-nav-toggle-line {
    transition: none;
  }
}