/**
 * Commerce Learning Hub - Mega Menu Styles
 * 
 * Full-width dropdown with categorized module links.
 * Appears on hover (desktop) or click (mobile).
 */

/* ============================================
   MEGA MENU TRIGGER
   ============================================ */
.mega-menu {
  position: relative;
}

.mega-menu__trigger {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-weight: var(--font-medium);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  background: transparent;
  border: none;
}

.mega-menu__trigger:hover,
.mega-menu__trigger[aria-expanded="true"] {
  background: var(--color-surface-elevated);
  color: var(--color-text);
}

.mega-menu__trigger-icon {
  transition: transform var(--transition-fast);
  font-size: 0.7em;
}

.mega-menu__trigger[aria-expanded="true"] .mega-menu__trigger-icon {
  transform: rotate(180deg);
}

/* ============================================
   MEGA MENU PANEL
   ============================================ */
.mega-menu__panel {
  position: absolute;
  top: calc(100% + var(--space-2));
  left: 50%;
  transform: translateX(-50%) translateY(-10px);
  width: min(900px, 92vw);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  padding: var(--space-6);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
  z-index: calc(var(--z-sidebar) + 10);   /* 410 — renders above sidebar (400) */
}

.mega-menu--open .mega-menu__panel,
.mega-menu__trigger[aria-expanded="true"] + .mega-menu__panel {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.mega-menu__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

.mega-menu__category {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.mega-menu__category-title {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-2);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.mega-menu__category-icon {
  font-size: var(--text-base);
}

.mega-menu__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.mega-menu__link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  transition: all var(--transition-fast);
}

.mega-menu__link:hover {
  background: var(--color-surface-elevated);
  color: var(--color-primary);
  text-decoration: none;
  transform: translateX(2px);
}

.mega-menu__link-icon {
  font-size: var(--text-base);
  width: 1.25rem;
  text-align: center;
}

.mega-menu__link-text {
  flex: 1;
}

.mega-menu__link-badge {
  font-size: var(--text-xs);
  padding: 2px 6px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  font-weight: var(--font-medium);
}

.mega-menu__footer {
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
}

.mega-menu__footer-text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.mega-menu__footer-link {
  color: var(--color-primary);
  font-weight: var(--font-medium);
  font-size: var(--text-sm);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
  .mega-menu__panel {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    width: 100%;
    max-height: calc(100vh - var(--header-height));
    overflow-y: auto;
    transform: translateY(-10px);
    border-radius: 0 0 var(--radius-xl) var(--radius-xl);
  }
  
  .mega-menu--open .mega-menu__panel,
  .mega-menu__trigger[aria-expanded="true"] + .mega-menu__panel {
    transform: translateY(0);
  }
  
  .mega-menu__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
  }
}

@media (max-width: 480px) {
  .mega-menu__grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   TELEPORTED MEGA MENU (fixed to viewport)
   Used when panel is moved to <body> to escape
   the header's stacking context.
   ============================================ */
.mega-menu__panel--teleported {
  position: fixed !important;
  top: auto !important;
  left: auto !important;
  transform: none !important;
  z-index: 9999 !important;
  opacity: 0 !important;
  visibility: hidden !important;
  pointer-events: none !important;
  transition: opacity var(--transition-base), visibility var(--transition-base) !important;
}

.mega-menu__panel--teleported:not(.mega-menu__panel--hidden) {
  opacity: 1 !important;
  visibility: visible !important;
  pointer-events: auto !important;
}

.mega-menu__panel--teleported:not(.mega-menu__panel--hidden) {
  opacity: 1 !important;
  visibility: visible !important;
  pointer-events: auto !important;
}