/* ========================================================================
   /explore — Professional 2-pane marketplace (3dsky-inspired)
   ======================================================================== */

:root {
  --explore-side-w: 260px;
  --explore-top: 64px;
  --explore-toolbar-h: 50px;
  --explore-stack: calc(var(--explore-top) + var(--explore-toolbar-h));
}


/* ── Shell layout ──────────────────────────────────────────────────────── */
.explore-shell {
  width: 100%;
  margin-top: var(--explore-top);
  min-height: calc(100vh - var(--explore-top));
}

/* ── Hero Search Box ───────────────────────────────────────────────────── */
.explore-search-hero {
  padding: 28px 28px 20px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.explore-search-box {
  max-width: 740px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  background: var(--bg);
  border: 1.5px solid var(--border2);
  border-radius: 14px;
  padding: 5px 6px 5px 16px;
  gap: 8px;
  transition: border-color .2s, box-shadow .2s;
}
.explore-search-box:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-glow);
}
.explore-search-icon {
  flex-shrink: 0;
  color: var(--text3);
}
.explore-search-box input {
  flex: 1;
  border: none;
  background: transparent;
  padding: 12px 4px;
  font-size: 1rem;
  color: var(--text);
  outline: none;
  font-family: inherit;
  min-width: 0;
}
.explore-search-box input::placeholder { color: var(--text3); }
.explore-search-btn {
  flex-shrink: 0;
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 11px 24px;
  border-radius: 10px;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background .15s;
}
.explore-search-btn:hover { background: var(--accent2); }

@media (max-width: 600px) {
  .explore-search-hero { padding: 16px 14px 14px; }
  .explore-search-box { padding: 4px 4px 4px 12px; }
  .explore-search-box input { font-size: 0.9rem; padding: 10px 4px; }
  .explore-search-btn { padding: 10px 16px; font-size: 0.84rem; }
}

.explore-body {
  display: grid;
  grid-template-columns: var(--explore-side-w) 1fr;
  max-width: 1640px;
  margin: 0 auto;
  min-height: calc(100vh - var(--explore-stack));
}

/* ── Toolbar (full-width sub-header) ───────────────────────────────────── */
.explore-toolbar {
  position: sticky;
  top: var(--explore-top);
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 12px;
  height: var(--explore-toolbar-h);
  padding: 0 28px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.explore-burger {
  display: none;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text2);
  padding: 6px 12px;
  border-radius: 8px;
  font-family: inherit;
  font-size: 0.84rem;
  cursor: pointer;
}
.explore-burger:hover { color: var(--text); border-color: var(--text3); }

.quick-pills {
  display: inline-flex;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2px;
  gap: 1px;
}
.qpill {
  background: transparent;
  border: none;
  color: var(--text3);
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 500;
  padding: 5px 14px;
  border-radius: 6px;
  cursor: pointer;
  transition: all .12s;
  white-space: nowrap;
}
.qpill:hover { color: var(--text); }
.qpill.active { background: var(--accent); color: #fff; }

.explore-toolbar-spacer { flex: 1 1 auto; }

.explore-chips { display: flex; align-items: center; flex-wrap: wrap; gap: 6px; }
.chip {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 4px 6px 4px 10px;
  background: rgba(59,130,246,0.12);
  border: 1px solid rgba(59,130,246,0.25);
  color: var(--accent);
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  max-width: 200px;
}
.chip-text { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.chip-x {
  background: transparent; border: none;
  color: var(--accent); font-size: 1rem; line-height: 1;
  cursor: pointer; padding: 0 2px; border-radius: 3px;
}
.chip-x:hover { background: rgba(59,130,246,0.18); }
.chip-clear-all {
  background: transparent; border: none;
  color: var(--text3); font-size: 0.8rem;
  cursor: pointer; padding: 2px 4px;
}
.chip-clear-all:hover { color: var(--accent); text-decoration: underline; }

.filter-control {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 6px 12px;
  border-radius: 7px;
  font-family: inherit;
  font-size: 0.82rem;
}
.filter-control:focus { outline: none; border-color: var(--accent); }
.sort-select { min-width: 120px; }

.iconbtn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text3);
  width: 34px; height: 34px;
  border-radius: 7px;
  cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center;
}
.iconbtn:hover { color: var(--text); border-color: var(--text3); }

/* ── Sidebar ───────────────────────────────────────────────────────────── */
.explore-side {
  position: sticky;
  top: var(--explore-stack);
  align-self: flex-start;
  height: calc(100vh - var(--explore-stack));
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border-right: 1px solid var(--border);
  z-index: 4;
}

.explore-side-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 12px;
  flex-shrink: 0;
  border-bottom: 1px solid var(--border);
}
.explore-side-search {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  color: var(--text3);
  transition: border-color .15s;
}
.explore-side-search input {
  background: transparent; border: none; outline: none;
  flex: 1; min-width: 0;
  color: var(--text);
  font-family: inherit; font-size: 0.82rem;
}
.explore-side-search input::placeholder { color: var(--text3); }
.explore-side-search:focus-within { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-glow); }

.explore-side-close {
  display: none;
  background: transparent; border: none;
  color: var(--text3);
  font-size: 1.4rem; line-height: 1;
  cursor: pointer; padding: 4px 8px;
}

.explore-tree {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 4px 0 28px;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
.explore-tree::-webkit-scrollbar { width: 5px; }
.explore-tree::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* Loading skeleton */
.tree-skeleton {
  display: flex; flex-direction: column; gap: 10px;
  padding: 12px 18px;
}
.tree-skeleton span {
  height: 12px;
  background: linear-gradient(90deg, var(--border) 0%, var(--surface) 50%, var(--border) 100%);
  background-size: 200% 100%;
  border-radius: 4px;
  animation: shimmer 1.4s infinite linear;
}
.tree-skeleton span:nth-child(1) { width: 75%; }
.tree-skeleton span:nth-child(2) { width: 55%; }
.tree-skeleton span:nth-child(3) { width: 85%; }
.tree-skeleton span:nth-child(4) { width: 45%; }
.tree-skeleton span:nth-child(5) { width: 65%; }
@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

.tree-error { padding: 14px 18px; color: #f87171; font-size: 0.84rem; }

/* ── Tree rows — clean minimal style ──────────────────────────────────── */
.tree-mother { border-bottom: 1px solid var(--border); }
.tree-mother:last-child { border-bottom: 0; }

.tree-row {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  background: transparent;
  border: none;
  cursor: pointer;
  font-family: inherit;
  text-align: left;
  transition: background .12s, color .12s;
  border-radius: 0;
  position: relative;
}
.tree-row:hover { background: var(--accent-glow); }

.tree-row .tree-name {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Level 0 — Mother categories */
.tree-row.level-0 {
  padding: 11px 16px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
}
.tree-row.level-0:not(.has-children) {
  font-weight: 500;
  color: var(--text3);
  font-size: 0.86rem;
}

/* Level 1 — Children */
.tree-row.level-1 {
  padding: 8px 16px 8px 34px;
  font-size: 0.84rem;
  font-weight: 500;
  color: var(--text2);
}

/* Level 2 — Grandchildren (leaves) */
.tree-row.level-2 {
  padding: 7px 16px 7px 48px;
  font-size: 0.82rem;
  font-weight: 400;
  color: var(--text3);
}

/* Selected state — subtle left-accented highlight */
.tree-row.selected {
  background: var(--accent-glow) !important;
  color: var(--accent) !important;
}
.tree-row.selected::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--accent);
  border-radius: 0 2px 2px 0;
}
.tree-row.selected .tree-checkbox {
  border-color: var(--accent);
  background: var(--accent);
}
.tree-row.selected .tree-checkbox::after {
  content: "";
  position: absolute; left: 3px; top: 1px;
  width: 4px; height: 7px;
  border: solid #fff;
  border-width: 0 1.8px 1.8px 0;
  transform: rotate(45deg);
}
.tree-row.selected .tree-arrow::after { border-color: var(--accent); }

/* Arrow for expandable nodes */
.tree-arrow {
  width: 16px; height: 16px;
  flex-shrink: 0;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.tree-arrow.placeholder { visibility: hidden; }
.tree-arrow::after {
  content: "";
  width: 5px; height: 5px;
  border-right: 1.5px solid var(--text3);
  border-bottom: 1.5px solid var(--text3);
  transform: rotate(-45deg);
  transition: transform .15s;
}
.tree-mother.open > .tree-row .tree-arrow::after,
.tree-child-wrap.open > .tree-row .tree-arrow::after {
  transform: rotate(45deg);
}

/* Checkbox for leaves */
.tree-checkbox {
  width: 14px; height: 14px;
  border: 1.5px solid var(--border2);
  border-radius: 3px;
  flex-shrink: 0;
  position: relative;
  background: transparent;
  transition: border-color .12s, background .12s;
}
.tree-row:hover .tree-checkbox { border-color: var(--text3); }

/* Children containers */
.tree-children, .tree-grand {
  display: none;
}
.tree-mother.open > .tree-children,
.tree-child-wrap.open > .tree-grand,
.tree-children.force-open,
.tree-grand.force-open { display: block; }

/* Filtered (search) state */
.explore-tree.filtered .tree-row.hide { display: none; }

/* ── Sidebar overlay (mobile) ──────────────────────────────────────────── */
.explore-side-overlay {
  display: none;
  position: fixed; inset: 0;
  top: var(--explore-stack);
  background: rgba(0,0,0,0.5);
  z-index: 50;
}
.explore-side-overlay.open { display: block; }

/* ── Main panel ────────────────────────────────────────────────────────── */
.explore-main {
  min-width: 0;
  padding: 28px 36px 60px;
  background: var(--bg);
}

.explore-filters[hidden] { display: none !important; }
.explore-filters {
  display: flex; flex-wrap: wrap; gap: 8px;
  margin-bottom: 20px;
  padding: 12px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
}

/* ── Heading ───────────────────────────────────────────────────────────── */
.explore-heading { margin-bottom: 20px; }
.explore-corrected {
  font-size: 0.84rem;
  color: var(--accent);
  margin: 0 0 6px;
  font-style: italic;
}
.explore-heading h1 {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 3px;
  color: var(--text);
}
.crumb-muted {
  color: var(--text3);
  font-weight: 400;
  font-size: 0.92rem;
}
.explore-subtitle {
  color: var(--text3);
  font-size: 0.84rem;
  margin: 0;
}

/* ── Product grid ──────────────────────────────────────────────────────── */
.explore-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 18px;
}

/* Skeleton cards */
.ex-card-skeleton {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  height: 280px;
  position: relative;
  overflow: hidden;
}
.ex-card-skeleton::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.03), transparent);
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite linear;
}

/* Product cards */
.ex-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  transition: border-color .18s, box-shadow .18s, transform .18s;
}
.ex-card:hover {
  border-color: var(--accent);
  box-shadow: 0 8px 24px rgba(0,0,0,0.15), 0 0 0 1px var(--accent-glow);
  transform: translateY(-2px);
}

.ex-card-img {
  position: relative;
  aspect-ratio: 1 / 1;
  background: var(--bg);
  overflow: hidden;
}
.ex-card-img img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .2s;
}
.ex-card:hover .ex-card-img img { transform: scale(1.03); }
.ex-card-img.no-img {
  background: linear-gradient(135deg, rgba(59,130,246,0.04), rgba(0,0,0,0.02));
}
.ex-card-img.no-img img { display: none; }

.card-chip {
  position: absolute;
  font-size: 0.64rem;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 4px;
  letter-spacing: 0.02em;
}
.card-chip.in-stock {
  top: 8px; right: 8px;
  background: rgba(34,197,94,0.9);
  color: #fff;
}
.card-chip.discount {
  top: 8px; left: 8px;
  background: #ef4444;
  color: #fff;
}

.ex-card-body {
  padding: 10px 12px 12px;
  display: flex;
  flex-direction: column;
  gap: 3px;
  flex: 1;
}
.ex-card-name {
  font-size: 0.84rem;
  font-weight: 600;
  margin: 0;
  line-height: 1.3;
  color: var(--text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.ex-card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  margin-top: auto;
  padding-top: 4px;
}
.ex-card-price { color: var(--accent); font-weight: 700; font-size: 0.84rem; }
.ex-card-loc { font-size: 0.72rem; color: var(--text3); }
.ex-card-supplier {
  font-size: 0.72rem;
  color: var(--text3);
  display: flex;
  align-items: center;
  gap: 3px;
  padding-top: 4px;
  border-top: 1px solid var(--border);
  margin-top: 6px;
}
.ex-card-sname { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; flex: 1; }
.verified-mark { color: var(--accent); font-weight: 700; font-size: 0.72rem; }

/* ── Pager + empty ─────────────────────────────────────────────────────── */
.explore-pager {
  display: flex;
  justify-content: center;
  margin-top: 28px;
}
.explore-empty {
  padding: 60px 16px;
  text-align: center;
  color: var(--text3);
  font-size: 0.92rem;
}

/* ── Responsive ────────────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .explore-body { grid-template-columns: 1fr; }
  .explore-side {
    position: fixed;
    top: var(--explore-stack);
    left: 0;
    bottom: 0;
    height: calc(100vh - var(--explore-stack));
    width: min(86vw, 300px);
    transform: translateX(-100%);
    transition: transform .22s ease;
    z-index: 51;
    box-shadow: 4px 0 20px rgba(0,0,0,0.4);
  }
  .explore-side.open { transform: translateX(0); }
  .explore-side-close { display: inline-block; }
  .explore-burger { display: inline-flex; }
  .explore-main { padding: 18px 16px 40px; }
  .explore-toolbar { padding: 0 14px; gap: 8px; }
}
@media (max-width: 600px) {
  .explore-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .ex-card-name { font-size: 0.8rem; }
}

/* ── RTL ───────────────────────────────────────────────────────────────── */
html[dir="rtl"] .tree-row.level-1 { padding-left: 18px; padding-right: 32px; }
html[dir="rtl"] .tree-row.level-2 { padding-left: 18px; padding-right: 46px; }
html[dir="rtl"] .card-chip.in-stock { right: auto; left: 8px; }
html[dir="rtl"] .card-chip.discount { left: auto; right: 8px; }
html[dir="rtl"] .explore-side { border-right: 0; border-left: 1px solid var(--border); }
@media (max-width: 900px) {
  html[dir="rtl"] .explore-side { left: auto; right: 0; transform: translateX(100%); }
  html[dir="rtl"] .explore-side.open { transform: translateX(0); }
}