/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --red: #A31F34;
  --red-dk: #8a1a2c;
  --fg: #1d1d1f;
  --fg2: #424245;
  --fg3: #86868b;
  --bg: #fff;
  --bg2: #f5f5f7;
  --line: #d2d2d7;
  --line-lt: #e8e8ed;
  --w: 880px;
  --nav-h: 44px;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
}

html { font-size: 15px; }
body {
  font-family: var(--sans);
  color: var(--fg);
  background: var(--bg);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--red); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; }
p { margin-bottom: 0.8em; }
p:last-child { margin-bottom: 0; }
ul { margin: 0.3em 0 0.8em 1.2em; }
li { margin-bottom: 0.25em; }
strong { font-weight: 600; }

h1 { font-size: 1.5rem; font-weight: 700; line-height: 1.2; letter-spacing: -0.01em; }
h2 { font-size: 1.15rem; font-weight: 600; line-height: 1.3; margin-bottom: 0.5em; letter-spacing: 0.01em; }

/* ===== Nav ===== */
.site-nav {
  background: var(--bg2);
  border-bottom: 1px solid var(--line);
  border-top: 3px solid var(--red);
  position: sticky; top: 0; z-index: 100;
}
.nav-container {
  max-width: var(--w);
  margin: 0 auto;
  padding: 0 1.5rem;
  height: var(--nav-h);
  display: flex; align-items: center; justify-content: space-between;
}
.nav-logo {
  display: flex; align-items: center; gap: 0.4rem;
  font-weight: 700; font-size: 0.9rem; color: var(--fg);
  text-decoration: none;
}
.nav-logo img { width: 24px; height: 24px; }
.nav-links { display: flex; gap: 1.1rem; align-items: center; }
.nav-links a {
  color: var(--fg2); font-size: 0.8rem; font-weight: 500;
  transition: color 0.15s;
}
.nav-links a:hover { color: var(--fg); text-decoration: none; }
.nav-links a.active { color: var(--red); font-weight: 600; }
.nav-toggle { display: none; }
.nav-toggle-label { display: none; cursor: pointer; }
.nav-toggle-label span { display: block; width: 18px; height: 1.5px; background: var(--fg); margin: 4px 0; }

/* ===== Content ===== */
.content {
  max-width: var(--w);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 3rem;
  flex: 1; width: 100%;
}
.content--home {
  max-width: 100%;
  padding: 0 0 3rem;
}
.content--home > *:not(.hero-band) {
  max-width: var(--w);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* ===== Hero ===== */
.hero-band {
  background: var(--bg2);
  border-bottom: 1px solid var(--line);
  padding: 2.5rem 1.5rem 2rem;
  margin-bottom: 2.5rem;
}
.hero {
  max-width: var(--w);
  margin: 0 auto;
}
.hero-inner {
  display: flex; align-items: center; gap: 1rem;
  margin-bottom: 1rem;
}
.hero-logo { width: 56px; height: 56px; flex-shrink: 0; }
.hero h1 { font-size: 2rem; margin: 0; letter-spacing: -0.02em; }
.hero-sub {
  font-size: 1rem; color: var(--fg2);
  font-weight: 400; margin-top: 0.1em;
}
.hero-desc {
  font-size: 1rem; color: var(--fg2);
  line-height: 1.65; max-width: 600px;
  margin-bottom: 0.75rem;
}
.hero-nav { display: flex; gap: 0.6rem; flex-wrap: wrap; }
.hero-nav a {
  font-size: 0.8rem; font-weight: 600;
  display: inline-flex; align-items: center;
  padding: 0.4em 1em;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--fg);
  background: var(--bg);
  transition: border-color 0.15s, color 0.15s;
}
.hero-nav a:hover {
  border-color: var(--red);
  color: var(--red);
  text-decoration: none;
}

/* ===== Two-column layout ===== */
.cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}
.cols section {
  background: var(--bg2);
  border: 1px solid var(--line-lt);
  border-radius: 10px;
  padding: 1.5rem;
}
.cols section h2 {
  font-size: 1.05rem;
  margin-bottom: 0.5em;
}
.cols section p {
  font-size: 0.93rem;
  color: var(--fg2);
  line-height: 1.6;
}
.cols section ul {
  font-size: 0.93rem;
  color: var(--fg2);
  line-height: 1.6;
}

/* ===== News section ===== */
.demo-section {
  margin-bottom: 2.5rem;
}
.demo-section h2 {
  margin-bottom: 0.6em;
}
.demo-img {
  border-radius: 10px;
  border: 1px solid var(--line-lt);
}

.news-section {
  margin-bottom: 2.5rem;
  padding-bottom: 2rem;
}
.news-section h2 {
  margin-bottom: 0.6em;
}
.news-row {
  padding: 0.3em 0;
  font-size: 0.93rem;
}
.news-row time {
  font-size: 0.8rem;
  color: var(--fg3);
  margin-right: 0.5em;
  font-variant-numeric: tabular-nums;
}
.news-more {
  margin-top: 0.3em;
  font-size: 0.85rem;
  font-weight: 600;
}

/* ===== Home credit ===== */
.section-rule {
  border: none;
  border-top: 1px solid var(--line);
  margin: 0 0 1.5rem;
}
.home-credit {
  font-size: 0.82rem;
  color: var(--fg3);
  line-height: 1.55;
}
.home-credit a { color: var(--fg3); text-decoration: underline; }
.home-credit a:hover { color: var(--red); }

/* ===== Page Title & Intro ===== */
.page-title { margin-bottom: 0.4em; }
.page-intro {
  font-size: 0.95rem;
  color: var(--fg2);
  margin-bottom: 2rem;
}

/* ===== News Listing ===== */
.post-list { list-style: none; }
.post-list li {
  padding: 1rem 0;
  border-bottom: 1px solid var(--line-lt);
}
.post-list li:last-child { border-bottom: none; }
.post-list time {
  font-size: 0.78rem; color: var(--fg3);
  display: block; margin-bottom: 0.1em;
  font-variant-numeric: tabular-nums;
}
.post-list h2 { font-size: 1.05rem; margin-bottom: 0.2em; }
.post-list h2 a { color: var(--fg); }
.post-list h2 a:hover { color: var(--red); }
.post-list .excerpt { color: var(--fg3); font-size: 0.9rem; }
.read-more { font-weight: 600; font-size: 0.82rem; }

/* ===== Single Post ===== */
.post-header {
  margin-bottom: 1.5rem; padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--line);
}
.post-header h1 { margin-bottom: 0.3em; }
.post-header time, .post-author { font-size: 0.82rem; color: var(--fg3); }
.post-content p { margin-bottom: 0.85em; line-height: 1.65; }
.post-content h2 { margin: 1.5em 0 0.5em; font-size: 1.1rem; }
.post-content h3 { margin: 1.25em 0 0.4em; font-size: 1rem; }
.post-content ul, .post-content ol { margin: 0.4em 0 0.85em 1.2em; }
.post-content img {
  border-radius: 8px;
  margin: 1rem 0;
}
.back-link { display: inline-block; margin-top: 1.5rem; font-weight: 600; font-size: 0.85rem; }

/* ===== Talks ===== */
.talks-list { list-style: none; }
.talk-upcoming {
  display: inline-block;
  font-size: 0.68rem; font-weight: 600; text-transform: uppercase;
  color: var(--red); background: #fef2f3;
  padding: 0.1em 0.5em; border-radius: 4px;
  margin-right: 0.3em; vertical-align: middle;
}
.talks-list li {
  padding: 1rem 0;
  border-bottom: 1px solid var(--line-lt);
}
.talks-list li:last-child { border-bottom: none; }
.talk-date {
  font-size: 0.78rem; color: var(--fg3);
  margin-bottom: 0.1em; font-variant-numeric: tabular-nums;
}
.talk-title { font-size: 1rem; font-weight: 600; margin-bottom: 0.1em; }
.talk-speaker { font-size: 0.9rem; color: var(--fg3); margin-bottom: 0.35em; }
.talk-links { display: flex; gap: 0.75rem; }
.talk-links a { font-size: 0.8rem; font-weight: 500; }

/* ===== Section headings (talks & pubs) ===== */
.section-heading {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--fg2);
  padding-bottom: 0.35em;
  border-bottom: 1px solid var(--line-lt);
  margin-bottom: 0.75em;
}
.section-heading + .section-heading,
h2.section-heading:not(:first-of-type) { margin-top: 2.5rem; }

/* ===== Publications ===== */
.pub-list { list-style: none; }
.pub-list li {
  padding: 1rem 0;
  border-bottom: 1px solid var(--line-lt);
}
.pub-list li:last-child { border-bottom: none; }
.pub-title { font-size: 1rem; font-weight: 600; margin-bottom: 0.1em; }
.pub-authors { font-size: 0.9rem; color: var(--fg2); margin-bottom: 0.1em; }
.pub-venue { font-size: 0.82rem; color: var(--fg3); margin-bottom: 0.35em; }

/* ===== Author list ===== */
.author-block { margin-top: 0.25rem; }
.author-names {
  font-size: 0.95rem; color: var(--fg2); line-height: 1.7;
  margin-bottom: 1rem;
}
.author-names sup { font-size: 0.7em; color: var(--fg3); padding-left: 0.1em; }
.author-affils {
  list-style: decimal; font-size: 0.82rem; color: var(--fg3);
  margin: 0 0 1.25rem; padding-left: 1.5rem;
}
.author-affils li { margin-bottom: 0.15em; padding-left: 0.25rem; }
.author-export {
  display: flex; align-items: center; gap: 0.75rem; margin-bottom: 0.75rem;
}
.copy-latex-btn {
  font-family: var(--sans); font-size: 0.8rem; font-weight: 600;
  display: inline-flex; align-items: center;
  padding: 0.4em 1em;
  border: 1px solid var(--line); border-radius: 6px;
  color: var(--fg); background: var(--bg);
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}
.copy-latex-btn:hover { border-color: var(--red); color: var(--red); }
.copy-latex-status { font-size: 0.8rem; color: var(--fg3); }
/* LaTeX source kept in the DOM for copying, but hidden from view */
.latex-source { display: none; }

/* ===== 404 ===== */
.four-oh-four-links ul { margin-top: 0.3em; }
.four-oh-four-links a { font-weight: 500; }

/* ===== Team ===== */
.team-group {
  margin-bottom: 2rem;
}
.team-group h2 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--fg2);
  padding-bottom: 0.35em;
  border-bottom: 1px solid var(--line-lt);
  margin-bottom: 0.75em;
}

/* --- PI cards --- */
.pi-list {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-bottom: 0.5rem;
}
.pi-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--bg2);
  border: 1px solid var(--line-lt);
  border-radius: 10px;
  padding: 1.25rem 1.5rem;
  flex: 1;
  min-width: 260px;
}
.pi-photo {
  width: 64px; height: 64px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}
.pi-photo--placeholder {
  background: var(--line-lt);
  color: var(--fg3);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; font-weight: 600;
}
.pi-card strong { display: block; font-size: 1rem; font-weight: 600; }
.pi-card .member-role {
  display: block;
  margin-left: 0;
  font-size: 0.82rem;
  color: var(--fg3);
}
.pi-card .member-role::before { content: none; }
.pi-card .member-inst {
  display: block;
  font-size: 0.78rem;
  color: var(--fg3);
}
.team-pis h2,
.team-funding h2,
.team-authors h2 {
  border-bottom: none;
  margin-bottom: 0.5em;
}

/* --- Member grid --- */
.team-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 0.6rem 2rem;
}
.member {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.35em 0;
  font-size: 0.9rem;
  line-height: 1.4;
}
.member-photo {
  width: 36px; height: 36px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}
.member-photo--placeholder {
  background: var(--line-lt);
  color: var(--fg3);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.7rem; font-weight: 600;
}
.member strong { font-weight: 600; }
.member a { color: var(--fg); }
.member a:hover { color: var(--red); }
.member-role {
  display: block;
  color: var(--fg3);
  font-size: 0.78rem;
}
.member-role::before { content: none; }

/* --- Funding --- */
.funding-list {
  list-style: none; padding: 0; margin: 0;
  font-size: 0.9rem; color: var(--fg2);
}
.funding-list li {
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--line-lt);
}
.funding-list li:last-child { border-bottom: none; }
.funding-id { font-family: var(--mono); font-size: 0.85em; color: var(--fg3); }

/* ===== Footer ===== */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 0.85rem 1.5rem;
  font-size: 0.75rem;
  color: var(--fg3);
  background: var(--bg2);
}
.footer-container {
  max-width: var(--w);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 0.3rem;
}
.footer-links a { color: var(--fg3); }
.footer-links a:hover { color: var(--red); }

/* ===== Responsive ===== */
@media (max-width: 640px) {
  .nav-toggle-label { display: block; }
  .nav-links {
    display: none; position: absolute;
    top: var(--nav-h); left: 0; right: 0;
    background: var(--bg2);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    padding: 0.6rem 1.5rem; gap: 0.4rem;
  }
  .nav-toggle:checked ~ .nav-links { display: flex; }
  .nav-toggle:checked ~ .nav-toggle-label span:nth-child(1) { transform: rotate(45deg) translate(4px, 4px); }
  .nav-toggle:checked ~ .nav-toggle-label span:nth-child(2) { opacity: 0; }
  .nav-toggle:checked ~ .nav-toggle-label span:nth-child(3) { transform: rotate(-45deg) translate(4px, -4px); }
  .cols { grid-template-columns: 1fr; gap: 1.5rem; }
  .hero h1 { font-size: 1.6rem; }
  .hero-band { padding: 2rem 1.5rem 1.5rem; }
  .team-list { grid-template-columns: 1fr; }
  .pi-list { flex-direction: column; }
  .footer-container { flex-direction: column; text-align: center; }
}