/* Table of Contents (NDB) */

:root {
  /* Fixed header (90px) + a bit of breathing room */
  --ndb-toc-scroll-offset: 140px;
}

html {
  scroll-padding-top: var(--ndb-toc-scroll-offset);
}

/*
  WP normally provides `.screen-reader-text` via the block-library stylesheet.
  Live site disables that CSS, so we include a minimal version here to keep
  accessibility text visually hidden while still readable by screen readers.
*/
.ruby-table-contents.ndb-table-contents .screen-reader-text {
  border: 0;
  clip: rect(1px, 1px, 1px, 1px);
  clip-path: inset(50%);
  height: 1px;
  margin: -1px;
  overflow: hidden;
  padding: 0;
  position: absolute;
  width: 1px;
  word-wrap: normal !important;
}

.ruby-table-contents.ndb-table-contents .screen-reader-text:focus {
  background-color: #ddd;
  clip: auto !important;
  clip-path: none;
  color: #444;
  display: block;
  font-size: 14px;
  height: auto;
  left: 5px;
  line-height: normal;
  padding: 12px 16px 10px;
  text-decoration: none;
  top: 5px;
  width: auto;
  z-index: 100000;
}

/* Make ALL heading anchors respect the fixed header (works without JS). */
h2[id],
h3[id],
h4[id],
h5[id],
h6[id] {
  scroll-margin-top: var(--ndb-toc-scroll-offset);
}

.ruby-table-contents.ndb-table-contents {
  /* Prevent TOC background from going under floated featured images */
  display: flow-root;
  position: relative;
  z-index: 2;
  background: linear-gradient(180deg, rgba(2, 6, 23, 0.75) 0%, rgba(15, 23, 42, 0.55) 100%);
  border: 1px solid rgba(148, 163, 184, 0.14);
  border-radius: 14px;
  padding: 18px 18px 14px;
  margin: 22px 0 26px;
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.35);
}

.ruby-table-contents.ndb-table-contents .toc-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.ruby-table-contents.ndb-table-contents .toc-title {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #ffffff;
  font-weight: 800;
  letter-spacing: 0.2px;
  font-size: 18px;
}

.ruby-table-contents.ndb-table-contents .toc-icon {
  color: rgba(255, 255, 255, 0.9);
  display: inline-flex;
}

.ruby-table-contents.ndb-table-contents .toc-toggle {
  appearance: none;
  border: 1px solid rgba(148, 163, 184, 0.18);
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.9);
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition:
    transform 120ms ease,
    background 120ms ease,
    border-color 120ms ease;
}

.ruby-table-contents.ndb-table-contents .toc-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(148, 163, 184, 0.28);
}

.ruby-table-contents.ndb-table-contents .toc-toggle:active {
  transform: scale(0.98);
}

.ruby-table-contents.ndb-table-contents .toc-chevron {
  transition: transform 160ms ease;
  transform: rotate(180deg); /* open state */
}

.ruby-table-contents.ndb-table-contents.is-collapsed .toc-chevron {
  transform: rotate(0deg);
}

.ruby-table-contents.ndb-table-contents .toc-content {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: ndbtoc;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px 26px;
}

@media (min-width: 860px) {
  .ruby-table-contents.ndb-table-contents .toc-content {
    grid-template-columns: 1fr 1fr;
  }
}

.ruby-table-contents.ndb-table-contents .toc-content li {
  counter-increment: ndbtoc;
}

.ruby-table-contents.ndb-table-contents .toc-content li a {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: rgba(226, 232, 240, 0.95);
  font-weight: 650;
  font-size: 14px;
  line-height: 1.35;
}

.ruby-table-contents.ndb-table-contents .toc-content li a::before {
  content: counter(ndbtoc);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 800;
  color: rgba(255, 255, 255, 0.95);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(148, 163, 184, 0.18);
}

.ruby-table-contents.ndb-table-contents .toc-content li a::after {
  content: "";
  height: 1px;
  background: rgba(148, 163, 184, 0.16);
  flex: 1;
  margin-left: 10px;
  border-radius: 999px;
}

.ruby-table-contents.ndb-table-contents .toc-content li a:hover {
  color: #ffffff;
}

.ruby-table-contents.ndb-table-contents.is-collapsed .toc-content {
  display: none;
}

/* Improve anchor scroll positioning under sticky headers */
.ndb-table-contents-anchor-target {
  scroll-margin-top: var(--ndb-toc-scroll-offset);
}