/* Shared document style for Wei Xiao's research project pages. */
:root {
  color-scheme: light;
  --doc-font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif;
  --doc-ink: #37352f;
  --doc-muted: #78756e;
  --doc-line: #e9e7e2;
  --doc-soft: #f5f4f1;
  --doc-paper: #fff;
}

* { box-sizing: border-box; }
html { scroll-padding-top: 130px; }
body {
  margin: 0;
  background: var(--doc-paper);
  color: var(--doc-ink);
  font-family: var(--doc-font);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-wrap: break-word;
}
a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid var(--doc-line);
  transition: border-color .15s;
}
a:hover { border-color: var(--doc-muted); }
a:focus-visible, button:focus-visible, summary:focus-visible, .table-scroll:focus-visible {
  outline: 2px solid #4fb1ba;
  outline-offset: 4px;
}
button { font: inherit; }
strong { font-weight: 600; }
p { margin: 0 0 18px; }
img, video { display: block; max-width: 100%; height: auto; }
img { background: #fff; }
figure { margin: 30px 0; }
figcaption, .figure-caption {
  margin-top: 12px;
  color: var(--doc-muted);
  font-size: 13px;
  line-height: 1.6;
}
h1, h2, h3 {
  font-weight: 650;
  letter-spacing: -.025em;
  line-height: 1.35;
  text-wrap: pretty;
}
h1 { margin: 0 0 22px; font-size: clamp(27px, 3.1vw, 36px); line-height: 1.22; }
h2 { margin: 0 0 20px; font-size: 24px; }
h3 { margin: 28px 0 10px; font-size: 18px; }
ul, ol { padding-left: 24px; margin: 16px 0 24px; }
li { padding-left: 4px; margin: 9px 0; }
sup { font-size: .7em; line-height: 0; }

.skip-link {
  position: absolute;
  top: -100px;
  left: 20px;
  padding: 8px 12px;
  background: var(--doc-paper);
  z-index: 30;
}
.skip-link:focus { top: 8px; }
.project-topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  height: 54px;
  padding: 0 28px;
  background: var(--doc-paper);
  border-bottom: 1px solid var(--doc-line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  font-size: 13px;
}
.breadcrumbs { display: flex; align-items: center; gap: 12px; min-width: 0; }
.breadcrumbs a, .topbar-link { border-color: transparent; white-space: nowrap; }
.breadcrumbs a:hover, .topbar-link:hover { border-color: var(--doc-muted); }
.breadcrumb-divider { color: #c4c1b9; }
.breadcrumb-current { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--doc-muted); }
.project-document { max-width: 860px; padding: 72px 0 0; margin: 0 auto; }
.project-kicker {
  margin-bottom: 18px;
  color: var(--doc-muted);
  font-size: 12px;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.project-authors { font-size: 15px; line-height: 1.9; margin-bottom: 10px; }
.project-affiliations { color: var(--doc-muted); font-size: 13px; margin-bottom: 8px; }
.author-notes { color: var(--doc-muted); font-size: 12px; margin-bottom: 22px; }
.project-resources { display: flex; flex-wrap: wrap; gap: 10px 24px; font-size: 14px; margin: 24px 0 34px; }
.project-summary { padding: 18px 22px; background: var(--doc-soft); border-left: 3px solid #d4d2cb; margin: 0 0 36px; }
.project-summary p { margin: 0; }
.summary-label { display: block; color: var(--doc-muted); font-size: 11px; letter-spacing: .07em; text-transform: uppercase; margin-bottom: 6px; }
.project-outline {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  position: sticky;
  top: 54px;
  z-index: 10;
  padding: 14px 0;
  margin: 36px 0 44px;
  background: var(--doc-paper);
  border-top: 1px solid var(--doc-line);
  border-bottom: 1px solid var(--doc-line);
  font-size: 13px;
}
.project-outline a { border-color: transparent; }
.project-outline a:hover { border-color: var(--doc-muted); }
.project-section { margin: 0 0 56px; }
.project-section > p, .project-section > ul, .project-section > ol { max-width: 780px; }
.method-steps { list-style: decimal-leading-zero; padding-left: 32px; }
.method-steps li { margin-bottom: 18px; padding-left: 10px; }
.method-steps strong { display: block; margin-bottom: 3px; }
.method-steps li::marker { color: var(--doc-muted); font-size: 13px; }
.table-scroll { max-width: 100%; overflow-x: auto; margin: 26px 0; }
table { width: 100%; border-collapse: collapse; font-size: 14px; line-height: 1.6; }
caption { text-align: left; padding-bottom: 12px; }
th, td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--doc-line); vertical-align: top; }
th { font-weight: 600; background: var(--doc-soft); }
th:first-child, td:first-child { padding-left: 12px; }
.result-note { color: var(--doc-muted); font-size: 13px; }
.media-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; margin: 28px 0; }
.media-grid figure { margin: 0; min-width: 0; }
.media-grid video { width: 100%; background: #f5f4f1; border-radius: 3px; }
.media-grid figcaption { margin-top: 9px; }
.video-embed { width: 100%; aspect-ratio: 16 / 9; margin: 28px 0 14px; background: var(--doc-soft); }
.video-embed iframe { display: block; width: 100%; height: 100%; border: 0; }
.paper-figure { width: 100%; border: 1px solid var(--doc-line); border-radius: 3px; padding: 12px; background: #fff; }
.figure-link { display: block; border: 0; }
.figure-link:focus-visible { outline-offset: 4px; }
.citation-heading { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 18px; }
.citation-heading h2 { margin: 0; }
.copy-citation { padding: 4px 10px; font-size: 12px; color: var(--doc-muted); background: transparent; border: 1px solid var(--doc-line); border-radius: 4px; cursor: pointer; }
.copy-citation:hover { background: var(--doc-soft); color: var(--doc-ink); }
.copy-status { min-height: 1.6em; color: var(--doc-muted); font-size: 12px; margin-top: 8px; }
pre { margin: 0; padding: 20px 22px; background: var(--doc-soft); border-radius: 4px; overflow-x: auto; font-size: 12px; line-height: 1.8; tab-size: 2; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.project-footer { display: flex; flex-wrap: wrap; gap: 12px 28px; justify-content: space-between; padding: 26px 0 44px; margin-top: 64px; border-top: 1px solid var(--doc-line); color: var(--doc-muted); font-size: 13px; }

@media (max-width: 960px) {
  .project-document { margin-inline: 40px; }
}
@media (max-width: 600px) {
  html { scroll-padding-top: 155px; }
  body { font-size: 15px; }
  .project-topbar { padding-inline: 20px; gap: 14px; }
  .breadcrumbs { gap: 8px; }
  .project-document { margin-inline: 22px; padding-top: 40px; }
  .project-kicker { font-size: 11px; }
  .project-authors { font-size: 14px; }
  .project-resources { gap: 10px 20px; }
  .project-summary { padding: 15px 17px; }
  .project-outline { gap: 8px 18px; margin-bottom: 34px; }
  .project-section { margin-bottom: 44px; }
  h2 { font-size: 22px; }
  .media-grid { grid-template-columns: minmax(0, 1fr); gap: 22px; }
  th, td { padding: 10px; min-width: 95px; }
  th:first-child, td:first-child { min-width: 160px; }
  caption { max-width: calc(100vw - 44px); }
  pre { padding: 16px; font-size: 11px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  a { transition: none; }
}