/* ==========================================================================
   MEGA MENU (desktop) — departments list + subcategory panel + preview
   ========================================================================== */

.mega-menu {
  position: absolute;
  top: 100%;
  inset-inline: 0;
  z-index: var(--z-mega-menu);
  padding-top: var(--space-2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition:
    opacity var(--duration) var(--ease),
    transform var(--duration) var(--ease),
    visibility var(--duration) var(--ease);
}

.mega-menu.is-open {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.mega-menu__inner {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr) 280px;
  max-height: calc(100vh - 200px);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

/* ---- Department list --------------------------------------------------- */

.mega-menu__departments {
  padding: var(--space-3);
  background: var(--background);
  border-inline-end: 1px solid var(--border);
  overflow-y: auto;
}

.mega-menu__dept {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  width: 100%;
  padding: 10px var(--space-3);
  border-radius: var(--radius);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  text-align: start;
  transition:
    background-color var(--duration-fast) var(--ease),
    color var(--duration-fast) var(--ease);
}

.mega-menu__dept-name {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* indicator lamp */
.mega-menu__dept-name::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--border-strong);
  transition:
    background-color var(--duration-fast) var(--ease),
    box-shadow var(--duration-fast) var(--ease);
}

.mega-menu__dept .icon {
  width: 16px;
  height: 16px;
  color: var(--text-subtle);
}

.mega-menu__dept.is-active {
  background: var(--surface);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.mega-menu__dept.is-active .mega-menu__dept-name::before {
  background: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.mega-menu__dept.is-active .icon {
  color: var(--primary);
}

/* ---- Subcategory panel ------------------------------------------------- */

.mega-menu__panel {
  padding: var(--space-7) var(--space-8);
  overflow-y: auto;
}

.mega-menu__panel[hidden] {
  display: none;
}

.mega-menu__panel-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-4);
  padding-bottom: var(--space-4);
  margin-bottom: var(--space-5);
  border-bottom: 1px solid var(--border);
}

.mega-menu__panel-title {
  font-size: var(--fs-xl);
}

.mega-menu__subs {
  columns: 3 180px;
  column-gap: var(--space-7);
}

.mega-menu__subs li {
  break-inside: avoid;
}

.mega-menu__subs a {
  display: block;
  padding: 7px 0;
  font-size: var(--fs-sm);
  color: var(--text-muted);
  transition: color var(--duration-fast) var(--ease);
}

.mega-menu__subs a:hover {
  color: var(--primary);
}

/* ---- Preview ----------------------------------------------------------- */

.mega-menu__preview {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  padding: var(--space-5);
  border-inline-start: 1px solid var(--border);
}

.mega-menu__preview-media {
  display: grid;
  place-items: center;
  aspect-ratio: 1 / 1;
  padding: var(--space-5);
  background: var(--surface-steel);
  border-radius: var(--radius);
}

.mega-menu__preview-media img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

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

@media (max-width: 1200px) {
  .mega-menu__inner {
    grid-template-columns: 250px minmax(0, 1fr);
  }

  .mega-menu__preview {
    display: none;
  }
}

@media (max-width: 992px) {
  .mega-menu {
    display: none;
  }
}