/**
 * Navigation Enhancement Styles
 * Scroll progress bar, glassmorphism header, mobile menu
 */

/* ============================================
   Scroll Progress Bar
   ============================================ */

.v105-scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-rust) 0%, var(--color-rust-light) 100%);
  z-index: 9999;
  transition: width 50ms linear;
  pointer-events: none;
}

/* ============================================
   Enhanced Header (Glassmorphism on Scroll)
   ============================================ */

.site-header--v105 {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-fixed);
  transition: background var(--transition-base),
              backdrop-filter var(--transition-base),
              box-shadow var(--transition-base);
}

.site-header--v105.site-header--scrolled {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 12px rgba(0, 0, 0, 0.08);
}

/* Make room for fixed header */
.v105-body {
  padding-top: 72px;
}

/* ============================================
   Active Nav Link
   ============================================ */

.site-header--v105 .nav-link {
  position: relative;
  transition: color var(--transition-fast);
}

.site-header--v105 .nav-link--active {
  color: var(--color-rust);
}

.site-header--v105 .nav-link--active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-rust);
  border-radius: 1px;
}

/* ============================================
   Mobile Hamburger Menu
   ============================================ */

.v105-menu-toggle {
  display: none;
  background: none;
  border: none;
  padding: var(--space-xs);
  cursor: pointer;
  color: var(--color-charcoal);
  transition: color var(--transition-fast);
}

.v105-menu-toggle:hover {
  color: var(--color-rust);
}

.v105-menu-toggle:focus-visible {
  outline: 2px solid var(--color-rust);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

@media (max-width: 768px) {
  .v105-menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .site-header--v105 .site-header__nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-white);
    box-shadow: var(--shadow-lg);
    flex-direction: column;
    padding: var(--space-md);
    border-top: 1px solid var(--color-light-gray);
  }

  .site-header--v105 .site-header__nav--open {
    display: flex;
  }

  .site-header--v105 .site-header__nav .nav-link {
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
  }

  .site-header--v105 .site-header__nav .nav-link:hover {
    background: var(--color-off-white);
  }
}

/* ============================================
   Accessibility
   ============================================ */

@media (prefers-reduced-motion: reduce) {
  .v105-scroll-progress {
    transition: none;
  }

  .site-header--v105 {
    transition: none;
  }
}

/* ============================================
   Print
   ============================================ */

@media print {
  .v105-scroll-progress,
  .v105-menu-toggle {
    display: none;
  }

  .site-header--v105 {
    position: static;
    background: white;
    box-shadow: none;
  }
}