/* PB Bookshop: Subject tree widget */
.pb-subject-tree {
  --pb-subject-columns: 3;
  --pb-subject-gap: 18px;
  --pb-subject-card-bg: #fff;
  --pb-subject-card-border: rgba(15, 23, 42, .08);
  --pb-subject-card-shadow: 0 14px 36px rgba(15, 23, 42, .07);
  --pb-subject-accent: #7c3aed;
  --pb-subject-accent-soft: rgba(124, 58, 237, .09);
  --pb-subject-text: #111827;
  --pb-subject-muted: #64748b;
  --pb-subject-line: rgba(148, 163, 184, .22);
  direction: rtl;
  text-align: right;
}


.pb-subject-tree--cols-1 { --pb-subject-columns: 1; }
.pb-subject-tree--cols-2 { --pb-subject-columns: 2; }
.pb-subject-tree--cols-3 { --pb-subject-columns: 3; }
.pb-subject-tree--cols-4 { --pb-subject-columns: 4; }
.pb-subject-tree--cols-5 { --pb-subject-columns: 5; }
.pb-subject-tree--cols-6 { --pb-subject-columns: 6; }

.pb-subject-tree *,
.pb-subject-tree *::before,
.pb-subject-tree *::after {
  box-sizing: border-box;
}

.pb-subject-tree__head {
  margin: 0 0 20px;
}

.pb-subject-tree__title {
  margin: 0 0 8px;
  color: var(--pb-subject-text);
  font-size: 26px;
  font-weight: 800;
  line-height: 1.35;
}

.pb-subject-tree__subtitle {
  color: var(--pb-subject-muted);
  font-size: 14px;
  line-height: 1.9;
  max-width: 760px;
}

.pb-subject-tree__grid {
  display: grid;
  grid-template-columns: repeat(var(--pb-subject-columns), minmax(0, 1fr));
  gap: var(--pb-subject-gap);
}

.pb-subject-card {
  position: relative;
  overflow: hidden;
  background: var(--pb-subject-card-bg);
  border: 1px solid var(--pb-subject-card-border);
  border-radius: 22px;
  padding: 18px;
  box-shadow: var(--pb-subject-card-shadow);
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}

.pb-subject-card::before {
  content: "";
  position: absolute;
  inset-block-start: 0;
  inset-inline-start: 18px;
  width: 64px;
  height: 4px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--pb-subject-accent), rgba(124, 58, 237, .16));
}

.pb-subject-card:hover {
  transform: translateY(-2px);
  border-color: rgba(124, 58, 237, .18);
  box-shadow: 0 18px 45px rgba(15, 23, 42, .10);
}

.pb-subject-card__main {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  margin-block-start: 3px;
  padding-block-end: 14px;
  border-bottom: 1px solid var(--pb-subject-line);
}

.pb-subject-card__main-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  color: var(--pb-subject-text);
  text-decoration: none;
  font-size: 17px;
  font-weight: 800;
  line-height: 1.5;
}

.pb-subject-card__main-link:hover {
  color: var(--pb-subject-accent);
}

.pb-subject-card__icon {
  display: inline-grid;
  place-items: center;
  flex: 0 0 34px;
  width: 34px;
  height: 34px;
  border-radius: 12px;
  background: var(--pb-subject-accent-soft);
  font-size: 17px;
}

.pb-subject-card__name {
  overflow-wrap: anywhere;
}

.pb-subject-card__count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  min-height: 30px;
  padding: 5px 10px;
  border-radius: 999px;
  background: #f1f5f9;
  color: #475569;
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}

.pb-subject-card__subs {
  display: grid;
  gap: 9px;
  list-style: none;
  padding: 14px 0 0;
  margin: 0;
}

.pb-subject-card__sub {
  margin: 0;
}

.pb-subject-card__sub-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 9px 10px;
  border-radius: 14px;
  color: #334155;
  text-decoration: none;
  background: rgba(248, 250, 252, .88);
  transition: background .16s ease, color .16s ease, transform .16s ease;
}

.pb-subject-card__sub-link:hover {
  color: var(--pb-subject-accent);
  background: var(--pb-subject-accent-soft);
  transform: translateX(-2px);
}

.pb-subject-card__sub-name {
  min-width: 0;
  overflow-wrap: anywhere;
  font-size: 14px;
  font-weight: 650;
  line-height: 1.65;
}

.pb-subject-card__sub-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  height: 24px;
  padding: 0 8px;
  border-radius: 999px;
  background: #e2e8f0;
  color: #475569;
  font-size: 12px;
  font-weight: 800;
}

.pb-subject-card__no-subs,
.pb-subject-tree__empty {
  color: var(--pb-subject-muted);
  background: rgba(248, 250, 252, .9);
  border: 1px dashed rgba(148, 163, 184, .5);
  border-radius: 16px;
  padding: 14px;
  font-size: 14px;
  line-height: 1.9;
}

.pb-subject-card__no-subs {
  margin-block-start: 14px;
}

.pb-subject-tree--compact .pb-subject-card {
  padding: 14px;
  border-radius: 16px;
  box-shadow: 0 8px 24px rgba(15, 23, 42, .05);
}

.pb-subject-tree--compact .pb-subject-card__main {
  padding-block-end: 10px;
}

.pb-subject-tree--compact .pb-subject-card__main-link {
  font-size: 15px;
}

.pb-subject-tree--compact .pb-subject-card__subs {
  gap: 6px;
  padding-block-start: 10px;
}

.pb-subject-tree--compact .pb-subject-card__sub-link {
  padding: 6px 8px;
  border-radius: 11px;
}

.pb-subject-tree--list .pb-subject-tree__grid {
  display: grid;
  grid-template-columns: 1fr;
}

.pb-subject-tree--list .pb-subject-card {
  display: grid;
  grid-template-columns: minmax(180px, .8fr) minmax(0, 1.6fr);
  gap: 16px;
  align-items: start;
}

.pb-subject-tree--list .pb-subject-card__main {
  border-bottom: 0;
  padding-block-end: 0;
}

.pb-subject-tree--list .pb-subject-card__subs {
  padding-block-start: 0;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

@media (max-width: 1024px) {
  .pb-subject-tree__grid {
    grid-template-columns: repeat(min(var(--pb-subject-columns), 2), minmax(0, 1fr));
  }
}

@media (max-width: 767px) {
  .pb-subject-tree__grid,
  .pb-subject-tree--list .pb-subject-tree__grid {
    grid-template-columns: 1fr;
  }

  .pb-subject-tree--list .pb-subject-card {
    grid-template-columns: 1fr;
  }

  .pb-subject-tree--list .pb-subject-card__subs {
    grid-template-columns: 1fr;
  }

  .pb-subject-card__main {
    flex-direction: column;
    align-items: stretch;
  }

  .pb-subject-card__count {
    align-self: flex-start;
  }
}

/* Lightweight Elementor preview marker */
.pb-subject-tree--editor-lite {
  opacity: .98;
}
.pb-subject-tree__editor-note {
  margin-block-start: 14px;
}


.pb-subject-tree__search {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  padding: 12px 14px;
  background: rgba(255,255,255,.88);
  border: 1px solid rgba(148,163,184,.22);
  border-radius: 18px;
  box-shadow: 0 10px 24px rgba(15,23,42,.04);
}
.pb-subject-tree__search-icon {font-size: 16px; line-height: 1; opacity: .75;}
.pb-subject-tree__search-input {
  flex: 1 1 auto;
  min-width: 0;
  border: 0;
  background: transparent;
  outline: none;
  color: var(--pb-subject-text);
  font-size: 14px;
  font-weight: 600;
}
.pb-subject-tree__search-input::placeholder {color: #94a3b8;}
.pb-subject-tree__search-empty {
  margin: 0 0 18px;
  padding: 12px 14px;
  border-radius: 16px;
  background: rgba(248,250,252,.92);
  border: 1px dashed rgba(148,163,184,.45);
  color: var(--pb-subject-muted);
}
.pb-subject-card.is-filtered-out { display:none !important; }
.pb-subject-card.is-search-match {
  border-color: rgba(124,58,237,.28);
  box-shadow: 0 18px 40px rgba(124,58,237,.10);
}
.pb-subject-tree__hl {
  background: linear-gradient(180deg, rgba(250,204,21,.15), rgba(250,204,21,.42));
  color: inherit;
  border-radius: 6px;
  padding: 0 2px;
}
.pb-subject-tree--skin-elegant {
  --pb-subject-accent: #2563eb;
  --pb-subject-accent-soft: rgba(37,99,235,.10);
  --pb-subject-card-shadow: 0 18px 50px rgba(37,99,235,.10);
}
.pb-subject-tree--skin-elegant .pb-subject-card { background: linear-gradient(180deg,#ffffff,#f8fbff); }
.pb-subject-tree--skin-minimal {
  --pb-subject-card-bg: #fff;
  --pb-subject-card-border: rgba(226,232,240,.95);
  --pb-subject-card-shadow: none;
  --pb-subject-accent: #0f766e;
  --pb-subject-accent-soft: rgba(15,118,110,.08);
}
.pb-subject-tree--skin-minimal .pb-subject-card::before { width: 38px; height: 3px; }
.pb-subject-tree--skin-outline {
  --pb-subject-accent: #7c2d12;
  --pb-subject-accent-soft: rgba(124,45,18,.07);
  --pb-subject-card-shadow: none;
}
.pb-subject-tree--skin-outline .pb-subject-card {
  border-width: 2px;
  background: #fff;
}
.pb-subject-tree--skin-dark {
  --pb-subject-card-bg: #0f172a;
  --pb-subject-card-border: rgba(148,163,184,.16);
  --pb-subject-card-shadow: 0 16px 40px rgba(2,6,23,.34);
  --pb-subject-accent: #38bdf8;
  --pb-subject-accent-soft: rgba(56,189,248,.14);
  --pb-subject-text: #e5eefc;
  --pb-subject-muted: #94a3b8;
  --pb-subject-line: rgba(148,163,184,.16);
}
.pb-subject-tree--skin-dark .pb-subject-tree__search,
.pb-subject-tree--skin-dark .pb-subject-card__sub-link,
.pb-subject-tree--skin-dark .pb-subject-card__count,
.pb-subject-tree--skin-dark .pb-subject-card__sub-count,
.pb-subject-tree--skin-dark .pb-subject-card__no-subs,
.pb-subject-tree--skin-dark .pb-subject-tree__search-empty {background: rgba(15,23,42,.78); color: #e2e8f0;}
.pb-subject-tree--skin-dark .pb-subject-tree__search {border-color: rgba(56,189,248,.15);} 
.pb-subject-tree--skin-dark .pb-subject-card__sub-link {border:1px solid rgba(148,163,184,.12);} 
.pb-subject-tree--skin-warm {
  --pb-subject-accent: #b45309;
  --pb-subject-accent-soft: rgba(180,83,9,.10);
  --pb-subject-card-border: rgba(245,158,11,.18);
}
.pb-subject-tree--skin-warm .pb-subject-card { background: linear-gradient(180deg,#fffdf7,#fff7ed); }
.pb-subject-tree--skin-warm .pb-subject-card__sub-link { background: rgba(255,251,235,.95); }

/* v1.5.124 / RBS 1.0.90.201: subject-tree column overflow guard + true visual appearance presets */
.pb-subject-tree {
  width: 100%;
  max-width: 100%;
  overflow-x: clip;
}
@supports not (overflow: clip) {
  .pb-subject-tree { overflow-x: hidden; }
}
.pb-subject-tree__grid,
.pb-subject-card,
.pb-subject-card__main,
.pb-subject-card__main-link,
.pb-subject-card__subs,
.pb-subject-card__sub,
.pb-subject-card__sub-link {
  min-width: 0;
  max-width: 100%;
}
.pb-subject-card {
  width: 100%;
}
.pb-subject-card__main-link {
  flex: 1 1 auto;
}
.pb-subject-card__subs {
  width: 100%;
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
}
.pb-subject-card__sub-link {
  width: 100%;
}
.pb-subject-card__name,
.pb-subject-card__sub-name {
  max-width: 100%;
  overflow-wrap: anywhere;
  word-break: break-word;
}
.pb-subject-card__count,
.pb-subject-card__sub-count {
  flex: 0 0 auto;
}

.pb-subject-tree--appearance-standard .pb-subject-card {
  isolation: isolate;
}

.pb-subject-tree--appearance-glass {
  --pb-subject-card-bg: rgba(255,255,255,.82);
  --pb-subject-card-border: rgba(255,255,255,.66);
  --pb-subject-card-shadow: 0 22px 60px rgba(15,23,42,.10);
}
.pb-subject-tree--appearance-glass .pb-subject-card {
  background: linear-gradient(145deg, rgba(255,255,255,.92), rgba(248,250,252,.74));
  border-color: rgba(255,255,255,.72);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.pb-subject-tree--appearance-glass .pb-subject-card__icon,
.pb-subject-tree--appearance-glass .pb-subject-card__sub-link,
.pb-subject-tree--appearance-glass .pb-subject-tree__search {
  background: rgba(255,255,255,.66);
  border: 1px solid rgba(255,255,255,.52);
}

.pb-subject-tree--appearance-library {
  --pb-subject-accent: #a16207;
  --pb-subject-accent-soft: rgba(161,98,7,.10);
  --pb-subject-card-border: rgba(180,83,9,.18);
  --pb-subject-card-shadow: 0 18px 44px rgba(120,53,15,.10);
}
.pb-subject-tree--appearance-library .pb-subject-card {
  background: linear-gradient(180deg, #fffaf0 0%, #fff7ed 100%);
}
.pb-subject-tree--appearance-library .pb-subject-card::before {
  width: 86px;
  background: linear-gradient(90deg, #b45309, rgba(245,158,11,.22));
}
.pb-subject-tree--appearance-library .pb-subject-card__icon {
  background: #ffedd5;
  box-shadow: inset 0 0 0 1px rgba(180,83,9,.12);
}
.pb-subject-tree--appearance-library .pb-subject-card__sub-link {
  background: rgba(255,251,235,.96);
}

.pb-subject-tree--appearance-corporate {
  --pb-subject-accent: #2563eb;
  --pb-subject-accent-soft: rgba(37,99,235,.09);
  --pb-subject-card-border: rgba(37,99,235,.15);
  --pb-subject-card-shadow: 0 18px 48px rgba(37,99,235,.095);
}
.pb-subject-tree--appearance-corporate .pb-subject-card {
  background:
    radial-gradient(circle at top left, rgba(219,234,254,.78), transparent 34%),
    linear-gradient(180deg, #fff, #f8fbff);
}
.pb-subject-tree--appearance-corporate .pb-subject-card__sub-link {
  background: #f8fbff;
  border: 1px solid rgba(219,234,254,.9);
}
.pb-subject-tree--appearance-corporate .pb-subject-card__count,
.pb-subject-tree--appearance-corporate .pb-subject-card__sub-count {
  background: #eff6ff;
  color: #1d4ed8;
}

.pb-subject-tree--appearance-soft {
  --pb-subject-accent: #64748b;
  --pb-subject-accent-soft: rgba(100,116,139,.075);
  --pb-subject-card-border: #eef2f7;
  --pb-subject-card-shadow: 0 10px 26px rgba(15,23,42,.045);
}
.pb-subject-tree--appearance-soft .pb-subject-card {
  background: #fff;
  border-radius: 26px;
}
.pb-subject-tree--appearance-soft .pb-subject-card::before {
  display: none;
}
.pb-subject-tree--appearance-soft .pb-subject-card__main {
  margin-block-start: 0;
}
.pb-subject-tree--appearance-soft .pb-subject-card__sub-link {
  background: #f8fafc;
}

.pb-subject-tree--appearance-luxury {
  --pb-subject-card-bg: #0f172a;
  --pb-subject-card-border: rgba(250,204,21,.18);
  --pb-subject-card-shadow: 0 22px 56px rgba(2,6,23,.32);
  --pb-subject-accent: #facc15;
  --pb-subject-accent-soft: rgba(250,204,21,.13);
  --pb-subject-text: #f8fafc;
  --pb-subject-muted: #cbd5e1;
  --pb-subject-line: rgba(250,204,21,.16);
}
.pb-subject-tree--appearance-luxury .pb-subject-card {
  background:
    radial-gradient(circle at top right, rgba(250,204,21,.12), transparent 34%),
    linear-gradient(145deg, #0f172a 0%, #111827 100%);
}
.pb-subject-tree--appearance-luxury .pb-subject-card__sub-link,
.pb-subject-tree--appearance-luxury .pb-subject-tree__search,
.pb-subject-tree--appearance-luxury .pb-subject-tree__search-empty,
.pb-subject-tree--appearance-luxury .pb-subject-card__no-subs {
  background: rgba(15,23,42,.76);
  border: 1px solid rgba(250,204,21,.11);
  color: #e5e7eb;
}
.pb-subject-tree--appearance-luxury .pb-subject-card__count,
.pb-subject-tree--appearance-luxury .pb-subject-card__sub-count {
  background: rgba(250,204,21,.14);
  color: #fde68a;
}
.pb-subject-tree--appearance-luxury .pb-subject-card__main-link,
.pb-subject-tree--appearance-luxury .pb-subject-card__sub-name,
.pb-subject-tree--appearance-luxury .pb-subject-tree__search-input {
  color: #f8fafc;
}