/**
 * Tree-style TOC for README (scoped .niklas-toc)
 * Colors aligned with Retype (neutral surfaces, #5297F1 links); dark panel #161716
 */

.niklas-toc {
  /* Light: same family as docs content */
  --toc-bg: #f6f7f6;
  --toc-border: #e2e4e2;
  --toc-line: #c9ccc9;
  --toc-head: #1a1c1a;
  --toc-subhead: #4a4d4a;
  --toc-link: #5297f1;
  --toc-link-hover: #3d7fd4;
  --toc-num: #6b706b;
  --toc-branch-chip: #d1d4d1;
  --toc-hover-bg: #e3e7f2;
  --toc-radius: 8px;
  --toc-shadow: 0 1px 2px rgba(0, 0, 0, 0.04), 0 1px 3px rgba(0, 0, 0, 0.06);
  font-family: inherit;
  font-size: 0.95rem;
  line-height: 1.45;
  margin: 1.5rem 0 2rem;
}

/* Retype: dark scheme uses .dark on the root element (same blues as sidebar/links) */
.dark .niklas-toc,
html.dark .niklas-toc {
  --toc-bg: #161716;
  --toc-border: #2a2c2a;
  --toc-line: #3d403d;
  --toc-head: #e8eae8;
  --toc-subhead: #b8bcb8;
  --toc-link: #5297f1;
  --toc-link-hover: #7eb4f5;
  --toc-num: #8b908b;
  --toc-branch-chip: #3a3d3a;
  --toc-hover-bg: #353634;
  --toc-shadow: 0 1px 0 rgba(255, 255, 255, 0.04) inset, 0 8px 24px rgba(0, 0, 0, 0.35);
}

.niklas-toc-panel {
  background: var(--toc-bg);
  border: 1px solid var(--toc-border);
  border-radius: var(--toc-radius);
  box-shadow: var(--toc-shadow);
  padding: 1.35rem 1.25rem 1.5rem 1.1rem;
  overflow-x: auto;
}

.niklas-toc-title {
  margin: 0 0 1rem 0.35rem;
  padding-bottom: 0.65rem;
  border-bottom: 1px solid var(--toc-border);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--toc-head);
}

.niklas-toc-branches {
  list-style: none;
  margin: 0;
  padding: 0;
}

.niklas-toc-branches > li {
  margin: 0;
  padding: 0;
}

.niklas-toc-branches > li + li {
  margin-top: 0.35rem;
}

.niklas-toc-branch-head {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0.85rem 0 0.4rem 0;
  padding: 0.35rem 0.5rem;
  border-radius: 6px;
  font-weight: 700;
  color: var(--toc-head);
  background: color-mix(in srgb, var(--toc-border) 40%, transparent);
}

.niklas-toc-branches > li:first-child .niklas-toc-branch-head {
  margin-top: 0;
}

.niklas-toc-branch-head::before {
  content: "";
  display: inline-block;
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 2px;
  background: var(--toc-branch-chip);
  flex-shrink: 0;
}

.niklas-toc-links {
  list-style: none;
  margin: 0 0 0 0.15rem;
  padding: 0.15rem 0 0.25rem 1rem;
  border-left: 2px solid var(--toc-line);
}

.niklas-toc-links li {
  margin: 0;
  padding: 0;
  position: relative;
}

.niklas-toc-links li + li {
  margin-top: 0.2rem;
}

.niklas-toc-links li::before {
  content: "";
  position: absolute;
  left: -1rem;
  top: 0.75em;
  width: 0.65rem;
  height: 2px;
  background: var(--toc-line);
  border-radius: 1px;
}

.niklas-toc-links a {
  display: inline-flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.35rem 0.5rem;
  padding: 0.28rem 0.45rem;
  margin-left: 0.15rem;
  border-radius: 6px;
  text-decoration: none !important;
  color: var(--toc-link) !important;
  transition: background 0.15s ease, transform 0.12s ease, color 0.15s ease;
}

.niklas-toc-links a:hover {
  background: var(--toc-hover-bg);
  color: var(--toc-link-hover) !important;
  transform: translateX(2px);
}

.niklas-toc-num {
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  font-size: 0.88em;
  color: var(--toc-num);
  min-width: 2.5rem;
}

.niklas-toc-sub {
  margin: 0.5rem 0 0.35rem 0;
}

.niklas-toc-sub:first-child {
  margin-top: 0.25rem;
}

.niklas-toc-subhead {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--toc-subhead);
  margin: 0.65rem 0 0.35rem 0;
  padding-left: 0.15rem;
  opacity: 0.95;
}

.niklas-toc-sub .niklas-toc-links {
  margin-top: 0.15rem;
  margin-bottom: 0.35rem;
}

.niklas-toc-sub .niklas-toc-links a .niklas-toc-num {
  display: none;
}

.niklas-toc-nested {
  margin-left: 0.25rem;
  padding-left: 0;
  border-left: none;
}

.niklas-toc-nested .niklas-toc-sub {
  padding-left: 0.5rem;
  border-left: 2px solid var(--toc-line);
  margin-left: 0.15rem;
}

.niklas-toc-nested .niklas-toc-subhead {
  padding-left: 0.35rem;
}

.niklas-toc-nested .niklas-toc-links {
  border-left: none;
  padding-left: 0.85rem;
  margin-left: 0.35rem;
}

.niklas-toc-nested .niklas-toc-links li::before {
  left: -0.85rem;
  width: 0.55rem;
}