/**
 * mega-menu.css v1.1 — Ophim Mega Menu Fix
 * 1. Desktop Header — Mega dropdown
 * 2. Sidebar — Accordion xổ XUỐNG
 * 3. Mobile Overlay — Accordion
 */

/* ==========================================================================
   1. DESKTOP HEADER — MEGA DROPDOWN
   ========================================================================== */
.mega-nav {
  display: none;
  align-items: center;
  gap: 2px;
  margin-left: 12px;
  height: 100%;
}
@media (min-width: 1024px) {
  .mega-nav { display: flex; }
}
.mega-nav__item {
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
}
.mega-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 12px;
  color: rgba(245,250,255,0.85);
  text-decoration: none;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
  border-radius: 8px;
  transition: color 0.2s, background-color 0.2s;
}
.mega-nav__link:hover,
.mega-nav__item--has-children:hover > .mega-nav__link {
  color: #fff;
  background-color: rgba(255,255,255,0.08);
}
.mega-nav__arrow {
  opacity: 0.5;
  transition: transform 0.25s, opacity 0.2s;
  flex-shrink: 0;
}
.mega-nav__item--has-children:hover .mega-nav__arrow {
  transform: rotate(180deg);
  opacity: 1;
}
.mega-nav__dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  padding-top: 6px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.2s ease, visibility 0.2s;
  z-index: 1001;
}
.mega-nav__item--has-children:hover > .mega-nav__dropdown {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}
.mega-nav__dropdown-inner {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 2px;
  min-width: 240px;
  max-width: 600px;
  padding: 8px;
  background: rgba(20,20,24,0.92);
  backdrop-filter: saturate(1.8) blur(24px);
  -webkit-backdrop-filter: saturate(1.8) blur(24px);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.45), 0 2px 8px rgba(0,0,0,0.25);
}
.mega-nav__dropdown-link {
  display: block;
  padding: 8px 14px;
  color: rgba(245,250,255,0.8);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  border-radius: 8px;
  white-space: nowrap;
  transition: color 0.15s, background-color 0.15s;
}
.mega-nav__dropdown-link:hover {
  color: #fff;
  background-color: rgba(255,255,255,0.1);
}


/* ==========================================================================
   2. SIDEBAR — ACCORDION XỔ XUỐNG
   ========================================================================== */

/* Toggle button giống hệt link bình thường, chỉ thêm cursor */
.sidebar-accordion__toggle {
  display: flex;
  width: 100%;
  background: none;
  border: none;
  cursor: pointer;
  color: inherit;
  font: inherit;
  text-align: left;
  padding: 0;
  margin: 0;
}

/* Mũi tên ▼ */
.sidebar-accordion__arrow {
  opacity: 0.4;
  transition: transform 0.25s ease, opacity 0.2s;
  flex-shrink: 0;
  margin-left: auto;
}
.sidebar-accordion--open > .sidebar-accordion__toggle .sidebar-accordion__arrow {
  transform: rotate(180deg);
  opacity: 0.8;
}

/* Children container — ẩn mặc định, mở khi --open */
.sidebar-accordion__children {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0.4, 0, 0.2, 1),
              opacity 0.2s ease;
  opacity: 0;
  padding-left: 20px;
}
.sidebar-accordion--open > .sidebar-accordion__children {
  max-height: 800px;  /* đủ lớn cho nhiều submenu */
  opacity: 1;
}

/* Mỗi link con */
.sidebar-accordion__child-link {
  display: flex;
  align-items: center;
  padding: 5px 10px;
  margin: 1px 0;
  color: rgba(245,250,255,0.7);
  text-decoration: none;
  font-size: 12.5px;
  font-weight: 400;
  border-radius: 8px;
  transition: color 0.15s, background-color 0.15s;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sidebar-accordion__child-link:hover {
  color: #fff;
  background-color: rgba(255,255,255,0.07);
}

/* Khi sidebar thu gọn (icon only) → ẩn children luôn */
.sidebar:not(.sidebar--expanded):not(.sidebar--open) .sidebar-accordion__children {
  display: none;
}


/* ==========================================================================
   3. MOBILE OVERLAY — ACCORDION
   ========================================================================== */
.mobile-submenu__toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  background: none;
  border: none;
  cursor: pointer;
  color: #fff;
  font: inherit;
  text-align: left;
  /* Match .mobile-menu-overlay__link style */
  padding: 14px 24px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: background 0.2s;
}
.mobile-submenu__toggle:hover {
  background: rgba(255,255,255,0.05);
}
.mobile-submenu__arrow {
  opacity: 0.5;
  transition: transform 0.25s ease;
  flex-shrink: 0;
  margin-left: 8px;
}
.mobile-submenu--open > .mobile-submenu__toggle .mobile-submenu__arrow {
  transform: rotate(180deg);
  opacity: 1;
}
.mobile-submenu__children {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0.4,0,0.2,1);
  background: rgba(255,255,255,0.03);
}
.mobile-submenu--open > .mobile-submenu__children {
  max-height: 600px;
}
.mobile-submenu__child-link {
  padding-left: 40px !important;
  font-size: 13px !important;
  font-weight: 500 !important;
  text-transform: none !important;
  letter-spacing: 0.02em !important;
  opacity: 0.8;
}
.mobile-submenu__child-link:hover { opacity: 1; }
.mobile-submenu {
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.mobile-submenu:last-child { border-bottom: none; }