/* =========================================
   MEGA MENU — megamenu-panel, megamenu-col, etc.
   Depends on: common.css, header.css
   ========================================= */

/* ---- Desktop: nav-item-header ---- */
.nav-item-header {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

/* Trigger Button (chevron) */
.megamenu-trigger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  cursor: pointer;
  color: rgba(255, 255, 255, 0.7);
  padding: 0;
}

.megamenu-chevron {
  transition: transform 0.2s ease;
  opacity: 0.7;
}

/* Open state for trigger chevron */
.nav-item.has-megamenu:hover .megamenu-chevron,
.nav-item.has-megamenu.open .megamenu-chevron {
  transform: rotate(180deg);
}

.nav-item.has-megamenu:hover .megamenu-trigger,
.nav-item.has-megamenu.open .megamenu-trigger,
.nav-item.has-megamenu:hover .megamenu-label,
.nav-item.has-megamenu.open .megamenu-label {
  color: var(--color-white);
}

/* ---- Column-level toggle (hidden on desktop) ---- */
.submenu-toggle {
  display: none;
}

/* ---- Column header wrapper (on desktop just flow normally) ---- */
.megamenu-col-header {
  display: flex;
  align-items: center;
}

/* The Panel */
.megamenu-panel {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  width: max-content;
  max-width: calc(100vw - 2rem);
  margin: 0 auto;
  max-height: calc(100vh - var(--header-height));
  overflow-y: auto;
  overflow-x: hidden;
  background: var(--surface);
  color: var(--color-text);
  box-shadow: var(--shadow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
  z-index: 90;
  border: 1px solid var(--color-gray-200);
  border-top: none;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
}

/* Show Panel on Hover or when 'open' class is applied via JS */
.nav-item.has-megamenu:hover .megamenu-panel,
.nav-item.has-megamenu.open .megamenu-panel {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* Container inside panel */
.megamenu-panel .container {
  display: flex;
  flex-direction: column;
  padding-top: var(--space-sm);
  padding-bottom: var(--space-sm);
  gap: 0;
}

/* Columns */
.megamenu-columns {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-gutter);
}

.megamenu-col {
  flex: 1;
  min-width: 220px;
  border-right: 1px solid var(--color-gray-200);
  padding-right: 1.5rem;
}

.megamenu-col:last-child {
  border-right: none;
  padding-right: 0;
}

/* Column Title */
.megamenu-col-title {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-gray-500);
  text-align: left;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1.5rem;
}

.megamenu-col-link {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s;
}

.megamenu-col-link:hover {
  color: var(--color-purple);
}

/* Items List */
.submenu-items {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 0;
  margin: 0;
  list-style: none;
  width: 100%;
}

/* Single Item */
.megamenu-item {
  width: 100%;
  text-align: left;
}

.megamenu-item a {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  color: var(--color-text);
  padding: 0.5rem;
  margin: -0.5rem;
  border-radius: var(--radius-md);
  transition: background 0.2s;
}

.megamenu-item a:hover {
  background: var(--surface-alt);
  color: var(--color-text);
}

/* Item Icon */
.megamenu-item-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  color: var(--color-purple);
  flex-shrink: 0;
  margin-top: 2px;
}

/* Item Content */
.megamenu-item-content {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.megamenu-item-label {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-gray-900);
  transition: color 0.2s;
}

.megamenu-item a:hover .megamenu-item-label {
  color: var(--color-purple);
}

.megamenu-item-desc {
  font-size: 0.75rem;
  color: var(--color-gray-700);
  line-height: 1.3;
}

/* Banners Section */
.megamenu-banners {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-sm);
  width: 100%;
}

/* Single Banner */
.megamenu-banner {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 1rem;
  background: linear-gradient(135deg, var(--color-purple-darkest) 0%, #1a0a3a 100%);
  color: var(--color-white);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: transform 0.2s, box-shadow 0.2s;
}

.megamenu-banner:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* Banner Icon */
.megamenu-banner-icon {
  color: var(--color-mint);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Banner Content */
.megamenu-banner-content {
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.megamenu-banner-content strong {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.1rem;
}

.megamenu-banner-content span {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.7);
}

/* Banner Arrow */
.megamenu-banner-arrow {
  margin-left: auto;
  display: flex;
  opacity: 0.5;
  transition: opacity 0.2s, transform 0.2s;
}

.megamenu-banner:hover .megamenu-banner-arrow {
  opacity: 1;
  transform: translateX(4px);
}

/* ===========================================
   MOBILE — accordion-based navigation
   =========================================== */
@media (max-width: 1080px) {

  /* --- Level 1: top-level nav items --- */
  .nav-item.has-megamenu {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
  }

  .nav-item-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 0.6rem 0;
    cursor: pointer;
  }

  .nav-item-header .megamenu-label {
    text-align: left;
    flex-grow: 0;
  }

  .megamenu-trigger {
    padding: 0.5rem;
    flex-shrink: 0;
    margin-left: auto;
  }

  /* --- Panel: hidden by default, toggled by JS --- */
  .megamenu-panel {
    position: static;
    width: 100%;
    max-width: 100%;
    max-height: none;
    box-shadow: none;
    opacity: 1;
    visibility: visible;
    transform: none;
    display: none;
    background: transparent;
    border: none;
    border-radius: 0;
  }

  .nav-item.has-megamenu.open .megamenu-panel {
    display: block;
  }

  /* Prevent hover-based opening on mobile */
  .nav-item.has-megamenu:hover .megamenu-panel {
    display: none;
    opacity: 0;
    visibility: hidden;
  }

  .nav-item.has-megamenu.open:hover .megamenu-panel {
    display: block;
    opacity: 1;
    visibility: visible;
  }

  .megamenu-panel .container {
    width: 100%;
    max-width: 100%;
    margin: 0;
    padding: 0 0 0.5rem 0;
    gap: 0;
  }

  /* --- Columns: stack vertically --- */
  .megamenu-columns {
    flex-direction: column;
    gap: 0;
    width: 100%;
    align-items: stretch;
  }

  .megamenu-col {
    width: 100%;
    min-width: 0;
    border-right: none;
    padding-right: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .megamenu-col:last-child {
    border-bottom: none;
  }

  /* --- Level 2: column headers as accordions --- */
  .megamenu-col-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 0.6rem 0;
    cursor: pointer;
  }

  .megamenu-col-title {
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 0;
    flex-grow: 1;
    text-align: left;
  }

  .submenu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    color: rgba(255, 255, 255, 0.5);
    padding: 0.5rem;
    cursor: pointer;
    flex-shrink: 0;
    margin-left: auto;
  }

  .submenu-chevron {
    transition: transform 0.2s ease;
  }

  .megamenu-col.open .submenu-chevron {
    transform: rotate(180deg);
  }

  /* --- Level 3: item list hidden by default --- */
  .submenu-items {
    display: none;
    padding-bottom: 0.75rem;
  }

  .megamenu-col.open .submenu-items {
    display: flex;
  }

  /* --- Mobile color overrides --- */
  .megamenu-item-label {
    color: var(--color-white);
  }

  .megamenu-item-desc {
    color: rgba(255, 255, 255, 0.6);
  }

  .megamenu-item a {
    color: var(--color-white);
    margin: 0;
    padding: 0.5rem 0.25rem;
  }

  .megamenu-item a:hover {
    background: rgba(255, 255, 255, 0.05);
  }

  .megamenu-item a:hover .megamenu-item-label {
    color: var(--color-mint);
  }

  .megamenu-item-icon {
    color: var(--color-mint);
  }

  /* --- Banners: stack on mobile --- */
  .megamenu-banners {
    flex-direction: column;
    margin-top: 0.5rem;
  }

  .megamenu-banner {
    padding: 0.5rem 1rem;
    gap: 0.75rem;
  }

  .megamenu-banner-icon {
    transform: scale(0.85); /* shrink the icon a bit to save height */
  }

  .megamenu-banner-content strong {
    font-size: 0.9rem;
  }

  .megamenu-banner-content span {
    font-size: 0.75rem;
  }
}