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

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(18px);
  background: linear-gradient(to bottom, rgba(246, 248, 251, 0.96), rgba(246, 248, 251, 0.88));
}

.site-header__inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: var(--space-4);
  min-height: 72px;
}

.site-header__center {
  display: flex;
  justify-content: center;
}

/* Desktop nav */
.site-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
}

.site-nav__link {
  position: relative;
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gray-600);
  padding-block: 0.25rem;
  transition: color var(--transition-base);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background: linear-gradient(to right, var(--color-primary), var(--color-accent));
  transition: width var(--transition-base);
}

.site-nav__link:hover {
  color: var(--color-text);
}

.site-nav__link:hover::after,
.site-nav__link--active::after {
  width: 100%;
}

.site-nav__link--active {
  color: var(--color-text);
}

/* Logo */
.site-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.4rem 1.1rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(148, 163, 184, 0.5);
  background: radial-gradient(circle at top left, rgba(46, 91, 255, 0.14), rgba(255, 255, 255, 0.95));
  font-size: 0.82rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
}

.site-logo__primary {
  font-weight: 600;
  color: var(--color-text);
}

.site-logo__secondary {
  margin-left: 0.4rem;
  font-weight: 400;
  color: var(--gray-500);
}

/* Mobile toggle */
.site-header__toggle {
  display: none;
  width: 40px;
  height: 36px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(148, 163, 184, 0.5);
  background: rgba(255, 255, 255, 0.9);
  justify-content: center;
  align-items: center;
  cursor: pointer;
}

.site-header__toggle-bar {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background-color: var(--gray-700);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.site-header__toggle-bar + .site-header__toggle-bar {
  margin-top: 4px;
}

.site-header__toggle--open .site-header__toggle-bar:first-child {
  transform: translateY(3px) rotate(45deg);
}

.site-header__toggle--open .site-header__toggle-bar:last-child {
  transform: translateY(-3px) rotate(-45deg);
}

/* Mobile nav */
.mobile-nav {
  position: fixed;
  inset: 0;
  background: radial-gradient(circle at top left, rgba(46, 91, 255, 0.26), rgba(7, 13, 26, 0.94));
  color: #ffffff;
  transform: translateY(-100%);
  opacity: 0;
  pointer-events: none;
  transition: transform var(--transition-slow), opacity var(--transition-slow);
}

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

.mobile-nav__inner {
  max-width: 1120px;
  margin-inline: auto;
  padding: var(--space-8) var(--space-4);
  display: flex;
  align-items: center;
  justify-content: center;
  background: #000;
  min-height: 100vh;
}

.mobile-nav__list {
  list-style: none;
  text-align: center;
}

.mobile-nav__item + .mobile-nav__item {
  margin-top: var(--space-4);
}

.mobile-nav__link {
  font-size: 1.05rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(226, 232, 240, 0.9);
}

.mobile-nav__link:hover {
  color: #fff;
}

.mobile-nav__item--accent .mobile-nav__link--accent {
  display: inline-flex;
  padding-inline: 1.9rem;
  padding-block: 0.7rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(148, 163, 184, 0.6);
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #ffffff;
  box-shadow: var(--shadow-medium);
}

/* Responsive behavior */
@media (max-width: 900px) {
  .site-header__inner {
    grid-template-columns: auto 1fr auto;
  }

  .site-nav {
    display: none;
  }

  .site-header__center {
    justify-content: center;
  }

  .site-header__toggle {
    display: inline-flex;
    flex-direction: column;
    z-index: 9999;
  }
}

@media (prefers-reduced-motion: reduce) {
  .mobile-nav {
    transition: none;
  }
}