:root {
  --bgatoc-anchor-offset: 88px;
  --bgatoc-blue: #0a66c2;
  --bgatoc-blue-dark: #004182;
  --bgatoc-text: #0f172a;
  --bgatoc-muted: #64748b;
  --bgatoc-border: rgba(15, 23, 42, 0.12);
  --bgatoc-bg: #ffffff;
  --bgatoc-soft: #f8fafc;
}


h2[id], h3[id], h4[id], h5[id], h6[id] {
  scroll-margin-top: var(--bgatoc-anchor-offset);
}

.bgatoc-wrapper {
  box-sizing: border-box;
  width: 100%;
  margin: 28px 0;
  color: var(--bgatoc-text);
  font-size: 15px;
  line-height: 1.55;
}

.bgatoc-wrapper *,
.bgatoc-wrapper *::before,
.bgatoc-wrapper *::after {
  box-sizing: border-box;
}

.bgatoc-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 14px;
}

.bgatoc-title-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.bgatoc-title {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.bgatoc-title::before {
  content: "";
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: var(--bgatoc-blue);
  box-shadow: 0 0 0 5px rgba(10, 102, 194, 0.10);
}

.bgatoc-count {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 4px 9px;
  font-size: 12px;
  font-weight: 700;
  color: var(--bgatoc-muted);
  background: rgba(100, 116, 139, 0.10);
  white-space: nowrap;
}

.bgatoc-toggle {
  appearance: none;
  border: 1px solid rgba(10, 102, 194, 0.14);
  background: rgba(10, 102, 194, 0.06);
  color: var(--bgatoc-blue-dark);
  border-radius: 999px;
  padding: 7px 10px;
  font-size: 12px;
  font-weight: 800;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: transform 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}

.bgatoc-toggle:hover,
.bgatoc-toggle:focus {
  background: rgba(10, 102, 194, 0.10);
  border-color: rgba(10, 102, 194, 0.24);
  transform: translateY(-1px);
  outline: none;
}

.bgatoc-toggle-icon {
  display: inline-block;
  line-height: 1;
  transition: transform 0.18s ease;
}

.bgatoc-wrapper.bgatoc-collapsed .bgatoc-toggle-icon {
  transform: rotate(-90deg);
}

.bgatoc-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.bgatoc-wrapper.bgatoc-collapsed .bgatoc-list {
  display: none;
}

.bgatoc-item {
  margin: 0;
  padding: 0;
}

.bgatoc-link {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  width: 100%;
  padding: 8px 10px;
  border-radius: 12px;
  text-decoration: none !important;
  color: var(--bgatoc-text);
  transition: background 0.18s ease, color 0.18s ease, transform 0.18s ease;
}

.bgatoc-link:hover,
.bgatoc-link:focus {
  background: rgba(10, 102, 194, 0.08);
  color: var(--bgatoc-blue-dark);
  transform: translateX(2px);
  outline: none;
}

.bgatoc-number {
  flex: 0 0 auto;
  min-width: 31px;
  padding: 1px 7px;
  border-radius: 999px;
  text-align: center;
  font-size: 11px;
  font-weight: 850;
  color: var(--bgatoc-blue-dark);
  background: rgba(10, 102, 194, 0.10);
}

.bgatoc-link-text {
  min-width: 0;
}

.bgatoc-level-3 .bgatoc-link {
  padding-left: 28px;
}

.bgatoc-level-4 .bgatoc-link {
  padding-left: 48px;
}

.bgatoc-level-5 .bgatoc-link {
  padding-left: 68px;
}

.bgatoc-level-6 .bgatoc-link {
  padding-left: 88px;
}

.bgatoc-style-modern {
  position: relative;
  overflow: hidden;
  padding: 20px;
  border: 1px solid rgba(10, 102, 194, 0.14);
  border-radius: 22px;
  background:
    radial-gradient(circle at top right, rgba(10, 102, 194, 0.12), transparent 36%),
    linear-gradient(145deg, #ffffff, #f8fbff);
  box-shadow: 0 20px 45px rgba(15, 23, 42, 0.09);
}

.bgatoc-style-modern::after {
  content: "";
  position: absolute;
  right: -40px;
  bottom: -40px;
  width: 120px;
  height: 120px;
  border-radius: 999px;
  background: rgba(10, 102, 194, 0.06);
  pointer-events: none;
}

.bgatoc-style-minimal {
  padding: 4px 0 8px;
  border-top: 1px solid var(--bgatoc-border);
  border-bottom: 1px solid var(--bgatoc-border);
}

.bgatoc-style-minimal .bgatoc-link {
  padding-left: 0;
  padding-right: 0;
}

.bgatoc-style-minimal .bgatoc-level-3 .bgatoc-link { padding-left: 18px; }
.bgatoc-style-minimal .bgatoc-level-4 .bgatoc-link { padding-left: 36px; }
.bgatoc-style-minimal .bgatoc-level-5 .bgatoc-link { padding-left: 54px; }
.bgatoc-style-minimal .bgatoc-level-6 .bgatoc-link { padding-left: 72px; }

.bgatoc-style-boxed {
  padding: 18px;
  border: 1px solid var(--bgatoc-border);
  border-radius: 16px;
  background: var(--bgatoc-soft);
}

@media (max-width: 720px) {
  .bgatoc-wrapper {
    margin: 22px 0;
    font-size: 14px;
  }

  .bgatoc-style-modern,
  .bgatoc-style-boxed {
    padding: 16px;
    border-radius: 18px;
  }

  .bgatoc-header {
    align-items: flex-start;
  }

  .bgatoc-title-wrap {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .bgatoc-level-3 .bgatoc-link { padding-left: 20px; }
  .bgatoc-level-4 .bgatoc-link { padding-left: 34px; }
  .bgatoc-level-5 .bgatoc-link { padding-left: 48px; }
  .bgatoc-level-6 .bgatoc-link { padding-left: 62px; }

  .bgatoc-wrapper.bgatoc-collapse-mobile .bgatoc-list {
    display: none;
  }

  .bgatoc-wrapper.bgatoc-collapse-mobile.bgatoc-open-mobile .bgatoc-list {
    display: block;
  }
}