/* ============================================================
   INITHAN — PRODUCTS PAGE FILTER UX ENHANCEMENT
   Purely additive. Does NOT override existing styles.
   Load AFTER styles.css and mobile.css in products.html.
   ============================================================ */

/* ─── HEADER HEIGHT TOKEN ─────────────────────────────────── */
:root {
  --navbar-h: 80px;
}

/* ─── LAYOUT: INDEPENDENT SCROLL REGIONS ─────────────────── */
.products-layout {
  align-items: stretch !important;
}

/* Sidebar — sticky + own scroll */
.products-sidebar {
  position: sticky !important;
  top: var(--navbar-h) !important;
  max-height: calc(100dvh - var(--navbar-h) - 32px) !important;
  overflow-y: auto !important;
  overflow-x: hidden !important;
  align-self: flex-start;
}

/* ─── CUSTOM SCROLLBAR (sidebar) ─────────────────────────── */
.products-sidebar::-webkit-scrollbar { width: 5px; }
.products-sidebar::-webkit-scrollbar-track { background: transparent; }
.products-sidebar::-webkit-scrollbar-thumb {
  background: var(--gray-200, #e5e7eb);
  border-radius: 10px;
}
.products-sidebar::-webkit-scrollbar-thumb:hover {
  background: var(--primary, #c41e3a);
}
.products-sidebar {
  scrollbar-width: thin;
  scrollbar-color: var(--gray-200, #e5e7eb) transparent;
}

/* ─── SCROLL SHADOW INDICATORS ───────────────────────────── */
.products-sidebar.shadow-top {
  box-shadow: inset 0 8px 8px -8px rgba(0,0,0,0.08),
              var(--shadow-sm, 0 2px 8px rgba(0,0,0,0.04));
}
.products-sidebar.shadow-bottom {
  box-shadow: inset 0 -8px 8px -8px rgba(0,0,0,0.08),
              var(--shadow-sm, 0 2px 8px rgba(0,0,0,0.04));
}
.products-sidebar.shadow-top.shadow-bottom {
  box-shadow: inset 0 8px 8px -8px rgba(0,0,0,0.08),
              inset 0 -8px 8px -8px rgba(0,0,0,0.08),
              var(--shadow-sm, 0 2px 8px rgba(0,0,0,0.04));
}

/* ─── SHOW MORE / SHOW LESS BUTTON ──────────────────────── */
.filter-show-more-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  margin-top: 10px;
  background: none;
  border: none;
  padding: 5px 0;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--primary, #c41e3a);
  cursor: pointer;
  font-family: var(--font-body, inherit);
  letter-spacing: 0.01em;
  transition: opacity 0.15s;
  min-height: 36px;
  text-align: left;
}
.filter-show-more-btn:hover { opacity: 0.7; text-decoration: underline; }
.filter-show-more-btn:focus-visible {
  outline: 2px solid var(--primary, #c41e3a);
  outline-offset: 3px;
  border-radius: 3px;
}
.filter-show-more-btn .smb-chevron {
  font-size: 0.7rem;
  display: inline-block;
  transition: transform 0.22s;
}
.filter-show-more-btn[aria-expanded="true"] .smb-chevron {
  transform: rotate(180deg);
}

/* Extra items — collapsed by default */
.filter-overflow {
  display: flex;
  flex-direction: column;
  gap: 10px;
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition: max-height 0.3s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.2s ease;
}
.filter-overflow.expanded {
  max-height: 800px;
  opacity: 1;
}

/* ─── MOBILE FILTER BAR ──────────────────────────────────── */
.mobile-filter-bar {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 8px 14px 10px;
  background: transparent;
  position: relative; /* Scrolls naturally with page, NOT fixed/sticky */
  top: auto;
  z-index: 10;
  box-shadow: none;
}
.mob-filter-open-btn {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  border: 1.5px solid var(--gray-200, #e5e7eb);
  border-radius: 8px;
  background: var(--white, #fff);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--dark, #1a1a1a);
  cursor: pointer;
  font-family: var(--font-body, inherit);
  transition: border-color 0.15s, color 0.15s;
}
.mob-filter-open-btn:hover {
  border-color: var(--primary, #c41e3a);
  color: var(--primary, #c41e3a);
}
.mob-filter-badge {
  background: var(--primary, #c41e3a);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 800;
  border-radius: 50%;
  min-width: 18px;
  height: 18px;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 0 3px;
}
.mob-filter-badge.visible { display: inline-flex; }

/* ─── MOBILE FILTER DRAWER ───────────────────────────────── */
.mobile-filter-drawer-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  z-index: 100000 !important;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}
.mobile-filter-drawer-overlay.open { display: block; }

.mobile-filter-drawer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--white, #fff);
  border-radius: 20px 20px 0 0;
  box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.35);
  z-index: 100001 !important;
  display: flex;
  flex-direction: column;
  max-height: 86vh;
  max-height: 86dvh; /* Fallback */
  transform: translateY(100%);
  transition: transform 0.32s cubic-bezier(0.33, 1, 0.68, 1);
  overflow: hidden;
}
.mobile-filter-drawer.open { transform: translateY(0); }

.mfd-handle {
  width: 44px;
  height: 4px;
  background: var(--gray-300, #cbd5e1);
  border-radius: 2px;
  margin: 12px auto 4px;
  flex-shrink: 0;
}
.mfd-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 20px 12px;
  border-bottom: 1px solid var(--gray-100, #f3f4f6);
  flex-shrink: 0;
  background: #ffffff;
}
.mfd-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--dark, #1a1a1a);
}
.mfd-close-btn {
  background: var(--gray-100, #f3f4f6);
  border: none;
  border-radius: 50%;
  width: 34px;
  height: 34px;
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--dark, #1a1a1a);
  font-weight: 700;
  line-height: 1;
  transition: background 0.15s, transform 0.15s;
}
.mfd-close-btn:hover { background: var(--gray-200, #e5e7eb); }

.mfd-body {
  flex: 1 1 auto;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 14px 20px 18px;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
}
.mfd-body::-webkit-scrollbar { width: 4px; }
.mfd-body::-webkit-scrollbar-thumb {
  background: var(--gray-200, #e5e7eb);
  border-radius: 10px;
}

.mfd-footer {
  display: flex;
  gap: 12px;
  padding: 14px 20px;
  padding-bottom: calc(14px + env(safe-area-inset-bottom, 0px));
  border-top: 1px solid var(--gray-200, #e5e7eb);
  flex-shrink: 0;
  background: #ffffff;
  position: relative;
  z-index: 10;
  box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.08);
}
.mfd-clear-btn {
  flex: 1;
  padding: 13px 16px;
  border: 1.5px solid var(--primary, #c41e3a);
  background: transparent;
  color: var(--primary, #c41e3a);
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  font-family: var(--font-body, inherit);
  transition: background 0.15s;
}
.mfd-clear-btn:hover { background: rgba(196, 30, 58, 0.05); }
.mfd-apply-btn {
  flex: 2;
  padding: 13px 16px;
  background: var(--primary, #c41e3a);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  font-family: var(--font-body, inherit);
  box-shadow: 0 4px 14px rgba(196, 30, 58, 0.25);
  transition: background 0.15s;
}
.mfd-apply-btn:hover { background: #a01530; }

/* Shared filter group styles for drawer */
.mfd-body .filter-group { margin-bottom: 20px; }
.mfd-body .filter-group-title {
  font-size: 0.95rem;
  font-weight: 700;
  padding: 8px 0 8px;
  border-bottom: 1px solid var(--gray-100, #f3f4f6);
}

/* ─── BODY SCROLL LOCK & BOTTOM NAV STACKING ────────────── */
body.scroll-locked {
  overflow: hidden !important;
  padding-right: var(--scrollbar-w, 0px);
}
body.scroll-locked .mobile-bottom-nav {
  z-index: 100 !important;
  pointer-events: none;
}

/* ─── RESPONSIVE ─────────────────────────────────────────── */
@media (max-width: 992px) {
  .products-sidebar { display: none !important; }
  .mobile-filter-bar { display: flex !important; }
  .products-layout { grid-template-columns: 1fr !important; }
}