/* =========================================================================
   Bento Mega Menu — full-bleed mobile drawer (≤991px)
   Namespace: .bn-mega-* — depends on tokens defined in bento-edu.css
   ========================================================================= */

/* ---------- Root container & overlay ------------------------------------- */
.bn-mega-menu {
  position: fixed;
  inset: 0;
  z-index: 1050;
  display: flex;
  visibility: hidden;
  pointer-events: none;
  font-family: var(--bn-font, 'Inter', system-ui, sans-serif);
  color: var(--bn-text, #18181B);
}
.bn-mega-menu[hidden] { display: none; }
.bn-mega-menu.is-open {
  visibility: visible;
  pointer-events: auto;
}

.bn-mega-menu__overlay {
  position: absolute;
  inset: 0;
  background: rgba(24, 24, 27, .55);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 0;
  transition: opacity .22s ease-out;
}
.bn-mega-menu.is-open .bn-mega-menu__overlay { opacity: 1; }

/* ---------- Panel (sliding sheet) ---------------------------------------- */
.bn-mega-menu__panel {
  position: relative;
  display: flex;
  flex-direction: column;
  width: 92vw;
  max-width: 420px;
  height: 100%;
  margin-right: auto;            /* default: slide-in from LEFT */
  background: var(--bn-surface, #fff);
  box-shadow: var(--bn-sh-lg, 0 24px 48px -16px rgba(24,24,27,.12));
  transform: translateX(-100%);
  transition: transform .26s cubic-bezier(.32, .72, .16, 1);
  will-change: transform;
  overflow: hidden;
}
.bn-mega-menu.is-open .bn-mega-menu__panel { transform: translateX(0); }

/* Right-side variant: <aside class="bn-mega-menu" data-position="end"> */
.bn-mega-menu[data-position="end"] .bn-mega-menu__panel {
  margin-right: 0;
  margin-left: auto;
  transform: translateX(100%);
}
.bn-mega-menu[data-position="end"].is-open .bn-mega-menu__panel { transform: translateX(0); }

/* ---------- Header (sticky top) ------------------------------------------ */
.bn-mega-menu__header {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--bn-s-3, 12px);
  padding: var(--bn-s-4, 16px) var(--bn-s-5, 20px);
  background: var(--bn-surface, #fff);
  border-bottom: 1px solid var(--bn-border, #E4E4E7);
}
.bn-mega-menu__logo {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  text-decoration: none;
}
.bn-mega-menu__logo img {
  display: block;
  height: 32px;
  width: auto;
}
.bn-mega-menu__close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--bn-border, #E4E4E7);
  border-radius: var(--bn-r-md, 12px);
  background: var(--bn-surface, #fff);
  color: var(--bn-text, #18181B);
  cursor: pointer;
  transition: background .15s ease-out, border-color .15s ease-out;
}
.bn-mega-menu__close:hover,
.bn-mega-menu__close:focus-visible {
  background: var(--bn-surface-2, #F4F4F5);
  border-color: var(--bn-border-strong, #D4D4D8);
}
.bn-mega-menu__close:focus-visible {
  outline: 2px solid var(--bn-brand, #E74238);
  outline-offset: 2px;
}
.bn-mega-menu__close svg { width: 20px; height: 20px; }

/* ---------- Search ------------------------------------------------------- */
.bn-mega-menu__search {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--bn-s-2, 8px);
  margin: var(--bn-s-4, 16px) var(--bn-s-5, 20px) var(--bn-s-2, 8px);
  padding: 10px var(--bn-s-3, 12px) 10px 40px;
  background: var(--bn-surface-2, #F4F4F5);
  border: 1px solid transparent;
  border-radius: var(--bn-r-md, 12px);
  transition: background .15s ease-out, border-color .15s ease-out;
}
.bn-mega-menu__search:focus-within {
  background: var(--bn-surface, #fff);
  border-color: var(--bn-brand, #E74238);
  box-shadow: 0 0 0 3px rgba(231, 66, 56, .15);
}
.bn-mega-menu__search-icon {
  position: absolute;
  left: var(--bn-s-3, 12px);
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--bn-text-muted, #71717A);
  pointer-events: none;
}
.bn-mega-menu__search-input {
  flex: 1;
  min-width: 0;
  height: 28px;
  padding: 0;
  border: 0;
  background: transparent;
  font: inherit;
  font-size: 15px;
  color: var(--bn-text, #18181B);
  outline: none;
}
.bn-mega-menu__search-input::placeholder { color: var(--bn-text-muted, #71717A); }
.bn-mega-menu__search-submit {
  flex-shrink: 0;
  height: 32px;
  padding: 0 12px;
  border: 0;
  border-radius: var(--bn-r-sm, 8px);
  background: var(--bn-brand, #E74238);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: background .15s ease-out;
}
.bn-mega-menu__search-submit:hover,
.bn-mega-menu__search-submit:focus-visible { background: var(--bn-brand-ink, #B91C1C); }
.bn-mega-menu__search-submit:focus-visible {
  outline: 2px solid var(--bn-brand, #E74238);
  outline-offset: 2px;
}

/* ---------- Scrollable nav area ----------------------------------------- */
.bn-mega-menu__nav {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: var(--bn-s-3, 12px) var(--bn-s-5, 20px) var(--bn-s-6, 24px);
  scrollbar-width: thin;
}
.bn-mega-menu__nav::-webkit-scrollbar { width: 6px; }
.bn-mega-menu__nav::-webkit-scrollbar-thumb {
  background: var(--bn-border-strong, #D4D4D8);
  border-radius: 3px;
}

/* ---------- Primary links (top-level navigation) ------------------------- */
.bn-mega-menu__primary {
  list-style: none;
  margin: 0 0 var(--bn-s-5, 20px);
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.bn-mega-menu__primary-link {
  display: flex;
  align-items: center;
  gap: var(--bn-s-3, 12px);
  min-height: 48px;
  padding: 12px var(--bn-s-4, 16px);
  border-radius: var(--bn-r-md, 12px);
  background: transparent;
  color: var(--bn-text, #18181B);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: background .15s ease-out, color .15s ease-out;
}
.bn-mega-menu__primary-link:hover,
.bn-mega-menu__primary-link:focus-visible,
.bn-mega-menu__primary-link.is-active {
  background: var(--bn-surface-2, #F4F4F5);
  color: var(--bn-brand, #E74238);
}
.bn-mega-menu__primary-link:focus-visible {
  outline: 2px solid var(--bn-brand, #E74238);
  outline-offset: 2px;
}
.bn-mega-menu__primary-link > svg:first-child {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  color: var(--bn-text-muted, #71717A);
}
.bn-mega-menu__primary-link:hover > svg:first-child,
.bn-mega-menu__primary-link.is-active > svg:first-child { color: var(--bn-brand, #E74238); }
.bn-mega-menu__primary-link > span { flex: 1; }
.bn-mega-menu__chevron {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  color: var(--bn-text-muted, #71717A);
  opacity: .6;
}

/* ---------- Sections ---------------------------------------------------- */
.bn-mega-menu__section {
  margin-top: var(--bn-s-5, 20px);
  padding-top: var(--bn-s-5, 20px);
  border-top: 1px solid var(--bn-border, #E4E4E7);
}
.bn-mega-menu__section-title {
  margin: 0 0 var(--bn-s-3, 12px);
  padding: 0 var(--bn-s-2, 8px);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--bn-text-muted, #71717A);
}

/* ---------- Categories grid --------------------------------------------- */
.bn-mega-menu__categories {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--bn-s-2, 8px);
}
.bn-mega-menu__category {
  display: flex;
  align-items: center;
  gap: var(--bn-s-3, 12px);
  min-height: 56px;
  padding: 10px var(--bn-s-3, 12px);
  border: 1px solid var(--bn-border, #E4E4E7);
  border-radius: var(--bn-r-md, 12px);
  background: var(--bn-surface, #fff);
  color: var(--bn-text, #18181B);
  text-decoration: none;
  transition: border-color .15s ease-out, background .15s ease-out, transform .15s ease-out;
}
.bn-mega-menu__category:hover,
.bn-mega-menu__category:focus-visible {
  border-color: var(--bn-border-strong, #D4D4D8);
  background: var(--bn-surface-2, #F4F4F5);
}
.bn-mega-menu__category:focus-visible {
  outline: 2px solid var(--bn-brand, #E74238);
  outline-offset: 2px;
}
.bn-mega-menu__category:active { transform: scale(.98); }
.bn-mega-menu__category-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: var(--bn-r-sm, 8px);
  background: var(--bn-indigo-bg, #EEF2FF);
  color: var(--bn-indigo-ink, #3730A3);
  font-size: 18px;
  line-height: 1;
}
.bn-mega-menu__category-name {
  flex: 1;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.3;
}
.bn-mega-menu__category-count {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  height: 22px;
  padding: 0 8px;
  border-radius: 999px;
  background: var(--bn-surface-2, #F4F4F5);
  color: var(--bn-text-muted, #71717A);
  font-size: 12px;
  font-weight: 600;
}

/* Tone variants — apply via data-tone="indigo|pink|cyan|lime|amber|violet|rose|teal" */
.bn-mega-menu__category[data-tone="indigo"] .bn-mega-menu__category-icon { background: var(--bn-indigo-bg); color: var(--bn-indigo-ink); }
.bn-mega-menu__category[data-tone="pink"]   .bn-mega-menu__category-icon { background: var(--bn-pink-bg);   color: var(--bn-pink-ink); }
.bn-mega-menu__category[data-tone="cyan"]   .bn-mega-menu__category-icon { background: var(--bn-cyan-bg);   color: var(--bn-cyan-ink); }
.bn-mega-menu__category[data-tone="lime"]   .bn-mega-menu__category-icon { background: var(--bn-lime-bg);   color: var(--bn-lime-ink); }
.bn-mega-menu__category[data-tone="amber"]  .bn-mega-menu__category-icon { background: var(--bn-amber-bg);  color: var(--bn-amber-ink); }
.bn-mega-menu__category[data-tone="violet"] .bn-mega-menu__category-icon { background: var(--bn-violet-bg); color: var(--bn-violet-ink); }
.bn-mega-menu__category[data-tone="rose"]   .bn-mega-menu__category-icon { background: var(--bn-rose-bg);   color: var(--bn-rose-ink); }
.bn-mega-menu__category[data-tone="teal"]   .bn-mega-menu__category-icon { background: var(--bn-teal-bg);   color: var(--bn-teal-ink); }
.bn-mega-menu__category[data-tone="brand"]  .bn-mega-menu__category-icon { background: var(--bn-brand-soft); color: var(--bn-brand-ink); }

/* ---------- Popular courses --------------------------------------------- */
.bn-mega-menu__popular {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--bn-s-2, 8px);
}
.bn-mega-menu__popular-item {
  display: grid;
  grid-template-columns: 56px 1fr;
  grid-template-rows: auto auto;
  column-gap: var(--bn-s-3, 12px);
  row-gap: 2px;
  align-items: center;
  min-height: 64px;
  padding: var(--bn-s-2, 8px);
  border-radius: var(--bn-r-md, 12px);
  background: var(--bn-surface, #fff);
  color: var(--bn-text, #18181B);
  text-decoration: none;
  transition: background .15s ease-out;
}
.bn-mega-menu__popular-item:hover,
.bn-mega-menu__popular-item:focus-visible { background: var(--bn-surface-2, #F4F4F5); }
.bn-mega-menu__popular-item:focus-visible {
  outline: 2px solid var(--bn-brand, #E74238);
  outline-offset: 2px;
}
.bn-mega-menu__popular-thumb {
  grid-row: 1 / span 2;
  width: 56px;
  height: 56px;
  border-radius: var(--bn-r-sm, 8px);
  object-fit: cover;
  background: var(--bn-surface-2, #F4F4F5);
}
.bn-mega-menu__popular-name {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.35;
}
.bn-mega-menu__popular-meta {
  font-size: 12px;
  font-weight: 500;
  color: var(--bn-text-muted, #71717A);
}

/* ---------- Footer (sticky bottom CTAs) --------------------------------- */
.bn-mega-menu__footer {
  position: sticky;
  bottom: 0;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  gap: var(--bn-s-2, 8px);
  padding: var(--bn-s-4, 16px) var(--bn-s-5, 20px);
  background: var(--bn-surface, #fff);
  border-top: 1px solid var(--bn-border, #E4E4E7);
  box-shadow: 0 -8px 16px -8px rgba(24, 24, 27, .06);
}
.bn-mega-menu__cta {
  flex: 1 1 calc(50% - 4px);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 var(--bn-s-4, 16px);
  border-radius: var(--bn-r-md, 12px);
  font-size: 14px;
  font-weight: 600;
  text-align: center;
  text-decoration: none;
  transition: background .15s ease-out, color .15s ease-out, border-color .15s ease-out, transform .12s ease-out;
}
.bn-mega-menu__cta:active { transform: scale(.98); }
.bn-mega-menu__cta:focus-visible {
  outline: 2px solid var(--bn-brand, #E74238);
  outline-offset: 2px;
}
.bn-mega-menu__cta svg { width: 18px; height: 18px; }

.bn-mega-menu__cta--primary {
  background: var(--bn-brand, #E74238);
  color: #fff;
  border: 1px solid var(--bn-brand, #E74238);
}
.bn-mega-menu__cta--primary:hover { background: var(--bn-brand-ink, #B91C1C); border-color: var(--bn-brand-ink, #B91C1C); }

.bn-mega-menu__cta--secondary {
  background: var(--bn-surface, #fff);
  color: var(--bn-text, #18181B);
  border: 1px solid var(--bn-border-strong, #D4D4D8);
}
.bn-mega-menu__cta--secondary:hover { background: var(--bn-surface-2, #F4F4F5); border-color: var(--bn-text-muted, #71717A); }

.bn-mega-menu__cta--account {
  flex: 1 1 100%;
  background: var(--bn-surface-2, #F4F4F5);
  color: var(--bn-text, #18181B);
  border: 1px solid var(--bn-border, #E4E4E7);
}
.bn-mega-menu__cta--account:hover { background: #fff; border-color: var(--bn-border-strong, #D4D4D8); }

.bn-mega-menu__cta--logout {
  flex: 1 1 100%;
  background: transparent;
  color: var(--bn-brand, #E74238);
  border: 1px solid var(--bn-brand-soft, #FFEEEB);
}
.bn-mega-menu__cta--logout:hover { background: var(--bn-brand-soft, #FFEEEB); }

/* ---------- Body scroll lock (toggled from JS) -------------------------- */
body.bn-mega-open { overflow: hidden; touch-action: none; }

/* ---------- Reduced motion ---------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  .bn-mega-menu__panel,
  .bn-mega-menu__overlay,
  .bn-mega-menu__primary-link,
  .bn-mega-menu__category,
  .bn-mega-menu__cta,
  .bn-mega-menu__close,
  .bn-mega-menu__search,
  .bn-mega-menu__search-submit,
  .bn-mega-menu__popular-item {
    transition: none !important;
  }
}

/* ---------- Hide on tablet/desktop -------------------------------------- */
@media (min-width: 992px) {
  .bn-mega-menu { display: none !important; }
}

/* ---------- Smallest viewports tighten paddings ------------------------- */
@media (max-width: 380px) {
  .bn-mega-menu__panel { width: 100vw; max-width: 100vw; }
  .bn-mega-menu__header,
  .bn-mega-menu__footer { padding-left: var(--bn-s-4, 16px); padding-right: var(--bn-s-4, 16px); }
  .bn-mega-menu__search { margin-left: var(--bn-s-4, 16px); margin-right: var(--bn-s-4, 16px); }
  .bn-mega-menu__nav { padding-left: var(--bn-s-4, 16px); padding-right: var(--bn-s-4, 16px); }
}