/* TacEx — a paper-first research project page. */
:root {
  color-scheme: light;
  --text: #363636;
  --heading: #292929;
  --muted: #666666;
  --link: #216c9c;
  --rule: #dedede;
  --code-background: #f6f6f6;
  --page-width: 960px;
  --text-width: 760px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body {
  margin: 0;
  color: var(--text);
  background: #fff;
  font: 17px/1.7 "Helvetica Neue", Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
button, input { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: default; }
[hidden] { display: none !important; }
a { color: var(--link); text-decoration: none; text-underline-offset: .18em; }
a:hover { text-decoration: underline; }
a:focus-visible, button:focus-visible, [tabindex]:focus-visible, video:focus-visible {
  outline: 2px solid var(--link);
  outline-offset: 4px;
}
p { margin: 0 0 1.1rem; }
h1, h2, h3 { color: var(--heading); }
h1 {
  max-width: 900px;
  margin: 0 auto 1.45rem;
  font-size: clamp(1.85rem, 4.6vw, 2.85rem);
  font-weight: 600;
  line-height: 1.17;
  letter-spacing: -.022em;
  text-wrap: balance;
}
h1 > span { display: block; }
h2 {
  margin: 0 0 1.35rem;
  font-size: 1.75rem;
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -.012em;
  text-align: center;
  text-wrap: balance;
}
h3 {
  margin: 0 0 .9rem;
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.35;
  text-wrap: balance;
}
strong { font-weight: 600; }
sup { font-size: .68em; line-height: 0; vertical-align: super; }
math { font-family: "STIX Two Math", "Cambria Math", "Latin Modern Math", math; }
.page { width: min(var(--page-width), calc(100% - 48px)); margin-inline: auto; }
.prose { width: min(100%, var(--text-width)); margin-inline: auto; }
.prose > :last-child { margin-bottom: 0; }
.skip-link {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: 10;
  padding: 8px 14px;
  background: #fff;
  border: 1px solid var(--rule);
}
.skip-link:focus { top: 12px; }

/* Title, authors and resources carry the hierarchy; no product navigation. */
.paper-header { padding: 56px 0 0; text-align: center; }
.authors { margin: 0 auto .65rem; font-size: 1.03rem; line-height: 1.65; }
.author-row { display: flex; flex-wrap: wrap; justify-content: center; gap: .1rem 1.35rem; }
.author-row + .author-row { margin-top: .12rem; }
.author-row > span { white-space: nowrap; }
.authors sup { margin-left: .13em; color: var(--text); }
.affiliations {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: .2rem 1.6rem;
  margin-bottom: .1rem;
  font-size: .91rem;
}
.affiliations span { white-space: nowrap; }
.contribution { margin: .25rem 0 0; color: var(--muted); font-size: .8rem; }
.resource-links { display: flex; flex-wrap: wrap; justify-content: center; gap: .55rem; margin: 1.25rem 0 1.7rem; }
.resource-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .6rem;
  min-height: 40px;
  padding: .35rem .95rem;
  border: 1px solid #bdbdbd;
  border-radius: 4px;
  color: var(--text);
  background: #fff;
  font-size: .88rem;
  font-weight: 500;
  line-height: 1.4;
}
.resource-button:hover { border-color: var(--text); background: #fafafa; text-decoration: none; }
.resource-format { padding-left: .6rem; border-left: 1px solid #ccc; color: var(--muted); font-size: .75rem; }
.paper-summary { max-width: 740px; margin: 0 auto 1.6rem; font-size: 1.06rem; line-height: 1.6; text-wrap: pretty; }

/* Media remain large; prose and captions use a narrower reading measure. */
figure { margin: 1.8rem 0 0; }
img, video, canvas { display: block; max-width: 100%; height: auto; }
.media-frame { width: 100%; }
.teaser { max-width: 860px; margin-inline: auto; }
.teaser video { width: 100%; background: #1c1c1c; border-radius: 2px; }
figcaption { max-width: 800px; margin: .7rem auto 0; color: var(--muted); font-size: .85rem; line-height: 1.6; text-align: left; }
figcaption strong { color: #454545; }
.teaser figcaption { max-width: 760px; }
.paper-figure img { width: 100%; }
.figure-link { display: block; }
.figure-link:hover { opacity: .97; }
.demo-figure { max-width: 800px; margin-inline: auto; }
.demo-figure img, .demo-figure canvas { width: 100%; }
.demo-controls { display: flex; justify-content: flex-end; margin-top: .25rem; }
.demo-figure figcaption { margin-top: .25rem; }
.text-button {
  min-height: 34px;
  padding: .25rem .45rem;
  border: 1px solid transparent;
  border-radius: 3px;
  background: transparent;
  color: var(--link);
  font-size: .8rem;
  line-height: 1.4;
}
.text-button:hover { text-decoration: underline; text-underline-offset: .18em; }
.text-button:disabled { color: var(--muted); text-decoration: none; }
.media-fallback {
  display: grid;
  place-content: center;
  gap: .15rem;
  min-height: 150px;
  padding: 1.6rem;
  margin: 0;
  border: 1px solid var(--rule);
  color: var(--muted);
  font-size: .9rem;
  line-height: 1.6;
  text-align: center;
}
.noscript-link { margin-top: .5rem; font-size: .85rem; }

/* A small table of contents, then continuous research sections. */
.section-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  column-gap: 1.8rem;
  row-gap: .35rem;
  margin: 2.2rem auto 0;
  padding: .75rem 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  font-size: .82rem;
  line-height: 1.6;
}
.section-nav a { color: var(--muted); }
.section-nav a:hover { color: var(--link); }
.section { padding-top: 3.1rem; }
.section-intro { color: var(--muted); }
.method-objective { margin-top: 1.7rem; }
.equation { max-width: 100%; overflow-x: auto; overflow-y: hidden; margin: .6rem 0 1.3rem; padding: .7rem .15rem; }
.equation math { width: max-content; min-width: min-content; margin: 0 auto; font-size: 1.12rem; }
.experiment { margin-top: 2rem; }
.experiment + .experiment { margin-top: 3rem; }
.subsection { margin-top: 2.4rem; }
.results-reference { margin-top: 1.25rem; color: var(--muted); font-size: .87rem; }

/* Citation remains selectable with or without JavaScript. */
.citation-section { padding-bottom: 1.4rem; }
.funding-section { padding-bottom: 2rem; }
.citation-heading { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-bottom: .85rem; }
.citation-heading h2 { margin: 0; font-size: 1.45rem; text-align: left; }
pre {
  max-width: 100%;
  overflow-x: auto;
  margin: 0;
  padding: 1.15rem 1.25rem;
  border-radius: 3px;
  background: var(--code-background);
  color: var(--text);
  font: .77rem/1.75 "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  tab-size: 2;
}
.copy-status { min-height: 1.5em; margin: .5rem 0 0; color: var(--muted); font-size: .8rem; }
.site-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .4rem 1rem;
  padding: 1.2rem 0 2rem;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: .78rem;
}
.site-footer p { margin: 0; }

@media (max-width: 700px) {
  body { font-size: 16px; }
  .page { width: calc(100% - 36px); }
  .paper-header { padding-top: 36px; }
  h1 { letter-spacing: -.017em; }
  h2 { font-size: 1.55rem; }
  h3 { font-size: 1.15rem; }
  .authors { font-size: .95rem; }
  .author-row { gap: .15rem 1rem; }
  .author-row + .author-row { margin-top: .2rem; }
  .affiliations { gap: .15rem 1rem; font-size: .83rem; }
  .paper-summary { font-size: 1rem; }
  .section-nav { gap: .4rem 1.3rem; margin-top: 1.65rem; }
  .section { padding-top: 2.5rem; }
  .equation math { font-size: 1rem; }
  .experiment + .experiment { margin-top: 2.5rem; }
  .subsection { margin-top: 2rem; }
  .resource-links { margin-bottom: 1.4rem; }
  pre { padding: 1rem; font-size: .73rem; }
}
@media (max-width: 400px) {
  h1 { font-size: 1.7rem; }
  .authors { font-size: .87rem; }
  .author-row { gap: .15rem .9rem; }
  .affiliations { font-size: .78rem; }
  .section-nav { column-gap: 1.1rem; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}
@media print {
  body { font-size: 11pt; }
  .page { width: 100%; }
  .paper-header { padding-top: 0; }
  .skip-link, .section-nav, .demo-controls, #copy-citation, .copy-status, .site-footer, .resource-links { display: none; }
  .section { padding-top: 1.6rem; }
  h1 { font-size: 25pt; }
  h2 { font-size: 17pt; }
  h3 { font-size: 13pt; }
  h2, h3 { break-after: avoid; }
  figure, pre { break-inside: avoid; }
  pre { white-space: pre-wrap; overflow-wrap: anywhere; }
  a { color: inherit; }
}