/* Source presentation: compact labels by default, optional margin notes. */
.source-layout-control {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 7px;
  margin: -4px 0 12px;
  font: 11px/1.5 system-ui, sans-serif;
  color: var(--muted);
}
.source-layout-control[hidden], .cite-details[hidden] { display: none; }
.source-layout-control > span:first-child { margin-right: 3px; }
.source-layout-control button {
  background: none;
  border: 0;
  border-bottom: 1px solid transparent;
  border-radius: 0;
  padding: 6px 2px;
  font: inherit;
  color: inherit;
  cursor: pointer;
}
.source-layout-control button[aria-pressed="true"] {
  color: var(--accent);
  border-bottom-color: currentColor;
}
.source-layout-control button:hover { color: var(--ink0); }
.source-layout-control button:focus-visible,
.cite_ref[data-source] .cite:focus-visible,
.source-note a:focus-visible,
.source-popover :focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
.cite_ref[data-source] { gap: 5px; }
.cite_ref[data-source] .cite {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 7px;
  border: 0;
  border-radius: 4px;
  background: var(--accent-hover-bg);
  font: 11px/1.6 system-ui, sans-serif;
  color: var(--accent);
  max-width: 100%;
  text-overflow: clip;
  white-space: normal;
  cursor: pointer;
  transition: background .15s;
}
.cite_ref[data-source] .cite:hover,
.cite_ref[data-source] .cite[aria-expanded="true"] { background: var(--cite-hover-bg); }
.cite_ref[data-source] .cite svg {
  width: 12px;
  height: 12px;
  flex: 0 0 12px;
  stroke: currentColor;
  stroke-width: 1.2;
  fill: none;
}
.cite_ref[data-source] .cite > span:last-child { white-space: nowrap; }
.cite-fallback { font: 11px/1.6 system-ui, sans-serif; }
.citation-enhanced .cite-fallback { display: none; }
.citation-margin { display: none; }
.source-role, .source-title, .source-creator, .source-locations { display: block; }
.source-role {
  font: 9px/1.6 system-ui, sans-serif;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--muted);
}
.source-title { font: 13px/1.5 system-ui, sans-serif; margin: 5px 0; color: var(--ink0); }
.source-creator { font: 11px/1.6 system-ui, sans-serif; color: var(--muted); }
.source-locations { display: flex; flex-wrap: wrap; gap: 3px 11px; margin-top: 6px; }
.source-locations a { font: 12px/1.6 system-ui, sans-serif; color: var(--accent); padding: 3px 0; text-underline-offset: 3px; }
.source-note { display: block; }
.source-note + .source-note { margin-top: 17px; }
.citation-margin .source-creator { display: none; }
.source-popover {
  position: fixed;
  inset: auto;
  margin: 0;
  padding: 21px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  color: var(--ink1);
  width: min(370px, calc(100vw - 28px));
  max-height: 70dvh;
  overflow: auto;
  overflow-wrap: anywhere;
  box-shadow: 0 12px 40px var(--shadow);
}
.source-popover:popover-open { animation: source-reveal .15s ease-out; }
.source-popover .source-title { font: 23px/1.25 var(--serif); margin: 10px 0; }
.source-popover .source-role { padding-right: 30px; }
.source-popover .source-locations { margin-top: 15px; }
.source-popover .source-locations a {
  background: var(--accent-hover-bg);
  border-radius: 4px;
  padding: 6px 9px;
  text-decoration: none;
}
.source-popover .source-locations a:hover { text-decoration: underline; }
.source-popover-close {
  position: absolute;
  right: 12px;
  top: 12px;
  width: 30px;
  height: 30px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--paper);
  color: var(--muted);
  font: 19px/1 system-ui, sans-serif;
  cursor: pointer;
}
html[data-source-layout="margin"] .citation-block .cite_ref[data-source] { display: none; }
html[data-source-layout="margin"] .citation-margin {
  display: block;
  border-left: 1px solid var(--line);
  padding-left: 15px;
  margin: 8px 0 20px;
}
/* Only claim a side margin when the reading column can keep a useful width. */
@media (min-width: 1150px) {
  html[data-source-layout="margin"]:has(.citation-block) .layout {
    max-width: 1420px;
    grid-template-columns: 250px minmax(0, 1fr);
  }
  html[data-source-layout="margin"] .reading-body:has(.citation-block) { padding-right: 224px; }
  html[data-source-layout="margin"] .citation-block {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 200px;
    column-gap: 24px;
    margin-right: -224px;
  }
  html[data-source-layout="margin"] .citation-margin { margin-top: 10px; }
}
@keyframes source-reveal { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: translateY(0); } }
@media (prefers-reduced-motion: reduce) {
  .source-popover:popover-open { animation: none; }
  .cite_ref[data-source] .cite { transition: none; }
}