/* Guide articles use a reading column; the overview retains its own card layout. */
.research-guide {
  --guide-ink: #252c31;
  --guide-body: #414b53;
  --guide-muted: #626d74;
  --guide-accent: #216b63;
  --guide-rule: #e0e5e5;
  max-width: 1020px;
  margin: 0 auto;
  color: var(--guide-body);
  font-family: "Times New Roman", Times, serif;
  font-size: 19px;
  line-height: 1.8;
  letter-spacing: 0;
  text-align: left;
  overflow-wrap: break-word;
}

.research-guide * { box-sizing: border-box; min-width: 0; letter-spacing: 0; }
.research-guide .fas { font-family: "Font Awesome 5 Free"; font-weight: 900; }
.research-guide a {
  color: var(--guide-accent);
  text-decoration: underline;
  text-decoration-color: #adc6c2;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}
.research-guide a:hover { text-decoration-color: currentColor; }
.research-guide a:focus-visible { outline: 2px solid var(--guide-accent); outline-offset: 5px; }

.research-guide .guide-breadcrumb,
.research-guide .guide-label,
.research-guide .guide-toc,
.research-guide .guide-paper-meta,
.research-guide .guide-paper-number,
.research-guide .guide-footer {
  font-family: Arial, Helvetica, sans-serif;
  font-size: 13px;
  line-height: 1.6;
}
.research-guide .guide-breadcrumb { margin: 4px 0 32px; }
.research-guide .guide-breadcrumb a { color: var(--guide-muted); text-decoration: none; }
.research-guide .guide-breadcrumb a:hover { color: var(--guide-accent); }
.research-guide .guide-breadcrumb i { margin-right: 8px; font-size: 11px; }
.research-guide .guide-header { margin: 0 0 40px; padding: 0 0 32px; border-bottom: 1px solid var(--guide-rule); }
.research-guide .guide-label { margin: 0 0 12px; color: var(--guide-accent); font-weight: 600; }
.research-guide .guide-header h1 {
  max-width: 790px;
  margin: 0;
  padding: 0;
  border: 0;
  color: var(--guide-ink);
  font-family: inherit;
  font-size: 38px;
  font-weight: 700;
  line-height: 1.18;
  text-align: left;
  text-wrap: balance;
}
.research-guide .guide-header h1::before { display: none; }
.research-guide .guide-subtitle {
  display: block;
  max-width: 720px;
  margin-top: 16px;
  color: var(--guide-muted);
  font-size: 24px;
  font-weight: 400;
  line-height: 1.4;
}

.research-guide .guide-reading-layout {
  display: grid;
  grid-template-columns: minmax(0, 700px) 186px;
  align-items: start;
  justify-content: space-between;
  gap: 48px;
}
.research-guide .guide-reading-column { grid-column: 1; grid-row: 1; }
.research-guide .guide-toc { position: sticky; top: 84px; grid-column: 2; grid-row: 1; }
.research-guide .guide-toc h2 { margin: 0 0 14px; padding: 0; border: 0; color: var(--guide-ink); font-family: inherit; font-size: 13px; font-weight: 600; line-height: 1.5; }
.research-guide .guide-toc ol { margin: 0; padding: 0; list-style: none; }
.research-guide .guide-toc li { margin: 0; padding: 0; }
.research-guide .guide-toc a { display: block; padding: 9px 0 9px 15px; border-left: 1px solid var(--guide-rule); color: var(--guide-muted); text-decoration: none; }
.research-guide .guide-toc a:hover { color: var(--guide-accent); }
.research-guide .guide-toc a[aria-current="location"] { border-left: 2px solid var(--guide-accent); padding-left: 14px; color: var(--guide-accent); }

.research-guide .guide-body h2,
.research-guide .guide-related h2,
.research-guide .guide-more h2 {
  margin: 40px 0 16px;
  padding: 0;
  border: 0;
  color: var(--guide-ink);
  font-family: inherit;
  font-size: 26px;
  line-height: 1.3;
  text-align: left;
  scroll-margin-top: 88px;
}
.research-guide #english > h2:first-child { margin-top: 0; }
.research-guide .guide-body p { margin: 0 0 22px; font-size: inherit; line-height: inherit; }
.research-guide .guide-body p:last-child { margin-bottom: 0; }
.research-guide #english,
.research-guide #references,
.research-guide #related-papers { scroll-margin-top: 88px; }
.research-guide .guide-reference-list,
.research-guide .guide-related,
.research-guide .guide-more { margin-top: 44px; padding-top: 28px; border-top: 1px solid var(--guide-rule); }
.research-guide .guide-reference-list h2,
.research-guide .guide-related h2,
.research-guide .guide-more h2 { margin-top: 0; }
.research-guide .guide-reference-list ul { list-style: none; margin: 22px 0 0; padding: 0; }
.research-guide .guide-reference-list li { margin: 0 0 22px; padding-left: 1.5em; text-indent: -1.5em; font-size: 17px; line-height: 1.7; }
.research-guide .guide-reference-list li p { margin: 0; }
.research-guide code { font-family: inherit; font-size: inherit; background: none; padding: 0; white-space: normal; overflow-wrap: anywhere; }

.research-guide .guide-related ol { margin: 0; padding: 0; list-style: none; }
.research-guide .guide-related li { display: grid; grid-template-columns: 25px minmax(0, 1fr); gap: 16px; margin: 0; padding: 22px 0; border-bottom: 1px solid var(--guide-rule); }
.research-guide .guide-related li:last-child { border-bottom: 0; padding-bottom: 0; }
.research-guide .guide-paper-number { padding-top: 1px; color: var(--guide-muted); }
.research-guide .guide-paper-meta { margin: 0 0 7px; color: var(--guide-muted); }
.research-guide .guide-related h3 { margin: 0; font-family: inherit; font-size: 21px; line-height: 1.4; }
.research-guide .guide-related h3 a { color: var(--guide-ink); text-decoration: none; }
.research-guide .guide-related h3 a:hover { color: var(--guide-accent); text-decoration: underline; }
.research-guide .guide-related i,
.research-guide .guide-more i { margin-left: 6px; color: var(--guide-accent); font-size: 12px; vertical-align: middle; }
.research-guide .guide-more ul { list-style: none; padding: 0; margin: 20px 0 0; }
.research-guide .guide-more li { margin: 0 0 12px; }
.research-guide .guide-more a { text-decoration: none; }
.research-guide .guide-more a:hover { text-decoration: underline; }
.research-guide .guide-footer { display: flex; flex-wrap: wrap; gap: 12px 26px; margin: 38px 0 48px; }
.research-guide .guide-footer a { color: var(--guide-muted); text-decoration: none; }
.research-guide .guide-footer a:hover { color: var(--guide-accent); text-decoration: underline; }

/* Shared overview foundation; detail-page rules above never target the overview. */
.guide-entry-section { font-family: "Times New Roman", Times, serif; color: #172033; text-align: center; line-height: 1.75; overflow-wrap: anywhere; margin: 1.5rem auto; padding: 1.3rem 0; border-top: 1px solid #d5e2e0; }
.guide-entry-section * { box-sizing: border-box; font-family: inherit; min-width: 0; }
.guide-entry-section h2 { color: #0f766e; border: 0; font-size: 1.45rem; line-height: 1.4; }
.guide-entry-list { list-style: none; padding: 0; margin: 1rem 0; }
.guide-entry-list li { padding: 1rem; margin: 1rem auto; border: 1px solid #dce6e7; border-radius: 7px; background: #f5f9fa; }
.guide-entry-list h3 { font-size: 1.23rem; line-height: 1.45; margin: .3rem auto; color: #124d61; }
.guide-entry-list p { margin: .6rem auto; max-width: 850px; }
.guide-entry-section a:focus-visible { outline: 3px solid #0f766e; outline-offset: 3px; }

@media (max-width: 1199px) {
  .research-guide { max-width: 760px; }
  .research-guide .guide-reading-layout { display: flex; flex-direction: column; gap: 32px; }
  .research-guide .guide-toc { position: static; width: 100%; padding-bottom: 24px; border-bottom: 1px solid var(--guide-rule); }
  .research-guide .guide-toc ol { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 4px 18px; }
  .research-guide .guide-header { margin-bottom: 26px; }
}

@media (max-width: 640px) {
  .research-guide { font-size: 18px; line-height: 1.75; }
  .research-guide .guide-breadcrumb { margin: 8px 0 24px; }
  .research-guide .guide-header { padding-bottom: 24px; }
  .research-guide .guide-header h1 { font-size: 30px; line-height: 1.2; }
  .research-guide .guide-subtitle { font-size: 21px; margin-top: 14px; }
  .research-guide .guide-toc ol { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 4px 12px; }
  .research-guide .guide-body h2,
  .research-guide .guide-related h2,
  .research-guide .guide-more h2 { font-size: 24px; }
  .research-guide .guide-related li { grid-template-columns: 22px minmax(0, 1fr); gap: 10px; }
  .research-guide .guide-reference-list li { font-size: 16px; padding-left: 1.25em; text-indent: -1.25em; }
}