/* About modal: version line + credit, and the tabbed Overview / Release notes
   layout. The Release notes pane is a scrollable stack of collapsible per-release
   sections. The tab chrome (.modal-tab*) is shared from source-dialog.css. */

.about-credit-by {
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.about-credit-line,
.about-credit-contact,
.about-social-links {
  display: inline-flex;
  gap: 4px 6px;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
}

.about-social-links {
  gap: 4px;
}

.about-social-link {
  display: inline-flex;
  width: 18px;
  height: 18px;
  align-items: center;
  justify-content: center;
  color: var(--focus);
}

.about-dialog-body .about-social-link:hover {
  color: var(--text);
  text-decoration: none;
}

.about-social-icon {
  display: block;
  width: 16px;
  height: 16px;
}

.about-version {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.about-version:not([hidden])::after {
  content: "\00b7";
  margin-left: 8px;
}

/* Override the shared scrolling body for the About modal only (source/kind
   dialogs use .about-dialog-body on other elements): host the tab strip plus a
   single active pane, with each pane managing its own scroll. */
#about-description {
  display: flex;
  flex-direction: column;
  gap: 0;
  padding: 0;
  overflow: hidden;
}

#about-description .modal-tablist {
  flex: 0 0 auto;
  padding: 12px 16px 0;
}

.about-panel {
  min-height: 0;
}

/* Overview pane: lede + explainer carousel + credit, scrolling as a whole. */
#about-overview:not([hidden]) {
  flex: 1 1 auto;
  display: grid;
  gap: 14px;
  align-content: start;
  overflow: auto;
  padding: 16px;
}

/* Release notes pane: fixed subhead + footnote framing a scrollable list. */
#about-release-notes:not([hidden]) {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
}

.about-notes-subhead {
  flex: 0 0 auto;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px 8px;
}

.about-notes-kicker {
  color: var(--muted);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.about-notes-actions {
  display: flex;
  align-items: baseline;
  gap: 10px;
  color: var(--faint);
  font-size: 12px;
}

.about-notes-meta {
  font-variant-numeric: tabular-nums;
}

.about-notes-toggle {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--focus);
  font: inherit;
  font-size: 12px;
  font-weight: 650;
  cursor: pointer;
  padding: 0;
}

.about-notes-toggle:hover {
  text-decoration: underline;
}

#about-release-notes-body {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  display: grid;
  gap: 8px;
  align-content: start;
  padding: 4px 16px 14px;
}

.about-notes-foot {
  flex: 0 0 auto;
  margin: 0;
  padding: 10px 16px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
}

/* One collapsible release section. */
.rel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  overflow: hidden;
}

.rel-h {
  margin: 0;
  font: inherit;
}

.rel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  padding: 10px 12px;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--text);
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.rel-head:hover {
  background: var(--surface-alt);
}

.rel-head:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: -2px;
}

.rel-id {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 6px 8px;
}

.rel-ver {
  font-size: 13px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.rel-date {
  color: var(--muted);
  font-size: 12px;
}

.rel-tag {
  align-self: center;
  padding: 2px 7px;
  border: 1px solid currentColor;
  border-radius: 999px;
  font-size: 9.5px;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.35;
  text-transform: uppercase;
}

.rel-tag-latest {
  color: var(--live);
}

.rel-tag-dev {
  color: var(--near);
}

.rel-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  color: var(--muted);
}

.rel-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 22px;
  height: 20px;
  padding: 0 7px;
  border-radius: 999px;
  background: var(--surface-alt);
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.rel-caret {
  color: var(--faint);
  transition: transform 0.15s ease;
}

.rel-head[aria-expanded="true"] .rel-caret {
  transform: rotate(180deg);
}

.rel-body {
  border-top: 1px solid var(--line);
  padding: 10px 14px 12px;
}

.rel-list {
  display: grid;
  gap: 7px;
  margin: 0;
  padding-left: 18px;
}

.rel-list li {
  color: var(--text);
  font-size: 13px;
  line-height: 1.5;
}

.rel-more {
  margin: 9px 0 0;
  color: var(--muted);
  font-size: 12px;
  font-style: italic;
}

@media (prefers-reduced-motion: reduce) {
  .rel-caret {
    transition: none;
  }
}