/* Dive-in details: the born block, the link, and the box that opens.
 *
 * Three surfaces, and they have to read as one mechanism. A reader who opens
 * a knowl should recognise the box as the same thing they saw born in a
 * chapter, or the transclusion teaches them nothing about where they are.
 *
 * The tokens come from eb-book.css. Nothing here defines a colour that is
 * not derived from one, so the two themes and the toggle keep working
 * without this file knowing they exist.
 */

/* --- the link ------------------------------------------------------------- */

/* A knowl is not a link to elsewhere, and should not look like one. The
 * dotted underline is the convention long-form sites have settled on for
 * "this expands", and the marker says which way it is about to go. */
article.yue a.eb-knowl {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px dotted var(--eb-accent);
  cursor: pointer;
  padding-bottom: 0.05em;
}

article.yue a.eb-knowl:hover,
article.yue a.eb-knowl:focus-visible {
  border-bottom-style: solid;
  background: var(--eb-accent-quiet);
}

article.yue a.eb-knowl .eb-knowl__mark::after {
  content: "\00a0\25be"; /* a small triangle, pointing down: it opens below */
  font-size: 0.8em;
  color: var(--eb-accent);
  vertical-align: 0.08em;
}

article.yue a.eb-knowl[aria-expanded="true"] .eb-knowl__mark::after {
  content: "\00a0\25b4";
}

/* --- the born block ------------------------------------------------------- */

article.yue .eb-detail {
  grid-column: wide-left / wide-right;
  margin: var(--eb-space-block) 0;
  padding: 1rem 1.1rem 0.75rem;
  border: 1px solid var(--eb-surface-edge);
  border-left: 3px solid var(--eb-accent);
  border-radius: 3px;
  background: var(--eb-surface);
}

article.yue .eb-detail__title {
  font-family: var(--eb-sans);
  font-size: 0.95rem;
  font-weight: 600;
  margin: 0 0 0.6rem;
  color: var(--eb-fg);
}

/* The kind, set small and in front of the title, so a reference table and a
 * definition are distinguishable at a glance in a page full of both. */
article.yue .eb-detail__kind {
  display: inline-block;
  margin-right: 0.55rem;
  padding: 0.08rem 0.4rem;
  border: 1px solid var(--eb-surface-edge);
  border-radius: 2px;
  background: transparent;
  font-family: var(--eb-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--eb-fg-muted);
  vertical-align: 0.1em;
}

/* Inside a detail the prose is not a grid item; the detail is. */
article.yue .eb-detail__body > * {
  grid-column: auto;
}

article.yue .eb-detail__body > * + * {
  margin-top: var(--eb-space);
}

/* --- the box that opens --------------------------------------------------- */

.eb-knowl-box {
  grid-column: text-left / text-right;
  margin: var(--eb-space) 0;
  padding: 0.9rem 1rem 0.6rem;
  border: 1px solid var(--eb-surface-edge);
  border-left: 3px solid var(--eb-accent);
  border-radius: 3px;
  background: var(--eb-surface);
  /* The reader's eye has to find it. A whole-box animation moves the text
   * they were reading, so only the edge announces itself. */
  animation: eb-knowl-in 140ms ease-out;
}

@keyframes eb-knowl-in {
  from {
    opacity: 0;
    transform: translateY(-2px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .eb-knowl-box {
    animation: none;
  }
}

.eb-knowl-box:focus-visible {
  outline: 2px solid var(--eb-accent);
  outline-offset: 2px;
}

.eb-knowl-box--loading::after {
  content: "opening\2026";
  display: block;
  font-family: var(--eb-sans);
  font-size: 0.85rem;
  color: var(--eb-fg-muted);
}

.eb-knowl-box .eb-knowl__title {
  font-family: var(--eb-sans);
  font-size: 0.9rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
}

.eb-knowl-box .eb-knowl__inner > * + * {
  margin-top: var(--eb-space);
}

/* Beezer's rule, and it earns its place: the box carries the way out, so a
 * reader who wants the surrounding argument is one click from it. */
.eb-knowl-box .eb-knowl__back {
  margin-top: 0.75rem;
  font-family: var(--eb-sans);
  font-size: 0.82rem;
}

.eb-knowl-box .eb-knowl__back a {
  color: var(--eb-accent);
}

.eb-knowl-box__close {
  display: block;
  margin: 0.75rem 0 0 auto;
  padding: 0.15rem 0.5rem;
  border: 1px solid var(--eb-surface-edge);
  border-radius: 2px;
  background: transparent;
  font-family: var(--eb-sans);
  font-size: 0.78rem;
  color: var(--eb-fg-muted);
  cursor: pointer;
}

.eb-knowl-box__close:hover {
  color: var(--eb-fg);
  border-color: var(--eb-accent);
}

/* A knowl inside a box, one level down, so nesting reads as depth rather
 * than as a second box at the same level. */
.eb-knowl-box .eb-knowl-box {
  margin-left: 0.75rem;
  border-left-color: var(--eb-fg-muted);
}

/* Tables are the commonest thing to dive into and the likeliest to be
 * wider than the box. */
.eb-knowl-box table,
.eb-knowl-box .table-wrapper {
  display: block;
  overflow-x: auto;
  max-width: 100%;
}

/* Print takes the born blocks and nothing else: a box that only exists after
 * a click cannot be on paper, and the born block is where it lives. */
@media print {
  article.yue a.eb-knowl {
    border-bottom: none;
  }
  article.yue a.eb-knowl .eb-knowl__mark {
    display: none;
  }
  .eb-knowl-box {
    display: none;
  }
}

/* A discrepancy is the one kind that should catch the eye in a page of
 * prose: it is a claim that upstream documentation is wrong, and a reader
 * deserves to see which parts of the book carry one. */
article.yue .eb-detail--discrepancy {
  border-left-color: #d1242f;
}

article.yue .eb-detail--discrepancy .eb-detail__kind {
  border-color: #d1242f;
  color: #d1242f;
}

:root:not([data-theme="light"]) article.yue .eb-detail--discrepancy,
:root[data-theme="dark"] article.yue .eb-detail--discrepancy {
  border-left-color: #ff7b72;
}

:root:not([data-theme="light"]) article.yue .eb-detail--discrepancy .eb-detail__kind,
:root[data-theme="dark"] article.yue .eb-detail--discrepancy .eb-detail__kind {
  border-color: #ff7b72;
  color: #ff7b72;
}

/* Sources are a list of links and nothing else, set quieter than the prose
 * around them. */
article.yue .eb-detail--sources {
  border-left-color: var(--eb-fg-muted);
  font-size: 0.92em;
}

article.yue .eb-detail--sources a {
  color: var(--eb-accent);
  word-break: break-word;
}