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

:root {
  --bg:       #f9f8f5;
  --surface:  #ffffff;
  --border:   #e2e0d9;
  --text:     #1a1917;
  --muted:    #6b6960;
  --accent:   #1a3a5c;
  --accent2:  #c0392b;
  --tag-bg:   #eef1f5;
  --tag-text: #2c4a6e;
  --radius:   4px;
  --font-serif: 'EB Garamond', Georgia, serif;
  --font-mono: 'JetBrains Mono', 'Fira Mono', monospace;
  --max-w: 1100px;
  --tr: 180ms ease;
}

html { font-size: 17px; scroll-behavior: smooth; }
body { font-family: var(--font-serif); background: var(--bg); color: var(--text); line-height: 1.7; min-height: 100vh; }

/* NAV */
nav { position: sticky; top: 0; z-index: 100; background: var(--surface); border-bottom: 1px solid var(--border); padding: 0 2rem; }
.nav-inner { max-width: var(--max-w); margin: 0 auto; display: flex; align-items: center; justify-content: space-between; height: 58px; }
.nav-logo { font-size: 1rem; font-weight: 600; letter-spacing: 0.02em; color: var(--accent); text-decoration: none; }
.nav-links { display: flex; gap: 0; list-style: none; }
.nav-links a { display: block; padding: 0.35rem 0.7rem; font-size: 0.82rem; letter-spacing: 0.05em; text-transform: uppercase; color: var(--muted); text-decoration: none; border-radius: var(--radius); transition: color var(--tr), background var(--tr); }
.nav-links a:hover { color: var(--text); background: var(--tag-bg); }
.nav-links a.active { color: var(--accent); font-weight: 700; }

/* ── Nav dropdown ─────────────────────────────────────────── */
.nav-dropdown { position: relative; }
.nav-dropdown-toggle {
  display: block;
  padding: 0.35rem 0.7rem;
  font-size: 0.82rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: color var(--tr), background var(--tr);
  white-space: nowrap;
}
.nav-dropdown-toggle.open { color: var(--text); background: var(--tag-bg); }
.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  list-style: none;
  min-width: 220px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  z-index: 200;
  padding: 0.3rem 0;
}
.nav-dropdown-menu.open { display: block; }
.nav-dropdown-menu a {
  display: block;
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  color: var(--text);
  text-decoration: none;
  transition: background var(--tr);
}
.nav-dropdown-menu a:hover { background: var(--tag-bg); }

/* LAYOUT */
.page-wrap { max-width: var(--max-w); margin: 0 auto; padding: 3.5rem 2rem 6rem; }
.page-header { padding-bottom: 2rem; margin-bottom: 2rem; border-bottom: 1px solid var(--border); }
.page-header h1 { font-size: 2.2rem; font-weight: 500; letter-spacing: -0.02em; color: var(--accent); line-height: 1.2; }
.page-header p { margin-top: 0.5rem; color: var(--muted); font-size: 1rem; max-width: 620px; }

/* FILTER BAR */
.filter-bar { display: flex; flex-wrap: wrap; gap: 0.45rem; margin-bottom: 2rem; align-items: center; }
.filter-label { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.07em; color: var(--muted); margin-right: 0.3rem; font-family: var(--font-mono); }
.tag { display: inline-block; padding: 0.2rem 0.6rem; background: var(--tag-bg); color: var(--tag-text); border-radius: 2px; font-size: 0.75rem; letter-spacing: 0.03em; font-family: var(--font-mono); cursor: pointer; border: 1px solid transparent; transition: all var(--tr); user-select: none; }
.tag:hover { border-color: var(--accent); color: var(--accent); }
.tag.active { background: var(--accent); color: #fff; border-color: var(--accent); }

/* PAPER CARDS */
.card-grid { display: grid; gap: 1.1rem; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.5rem 1.7rem; transition: box-shadow var(--tr), border-color var(--tr); }
.card:hover { box-shadow: 0 2px 14px rgba(0,0,0,0.07); border-color: #ccc; }
.card-hidden { display: none !important; }
.paper-title { font-size: 1.08rem; font-weight: 600; color: var(--text); margin-bottom: 0.3rem; line-height: 1.35; }
.paper-meta { font-size: 0.8rem; color: var(--muted); font-family: var(--font-mono); margin-bottom: 0.6rem; display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; }
.venue { background: #fdf0ee; color: var(--accent2); padding: 0.1rem 0.42rem; border-radius: 2px; font-weight: 700; }
.paper-abstract { font-size: 0.9rem; color: var(--muted); line-height: 1.65; margin-bottom: 0.85rem; }
.paper-links { display: flex; gap: 1.2rem; }
.paper-link { font-size: 0.8rem; font-family: var(--font-mono); color: var(--accent); text-decoration: none; border-bottom: 1px solid transparent; transition: border-color var(--tr); }
.paper-link:hover { border-color: var(--accent); }
.card-tags { display: flex; flex-wrap: wrap; gap: 0.38rem; margin-top: 0.85rem; }

/* PEOPLE CARDS */
.people-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.4rem;
}

.person-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem 1.2rem;

  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;

  transition: box-shadow var(--tr), border-color var(--tr);
}

.person-card:hover {
  box-shadow: 0 2px 14px rgba(0,0,0,0.07);
  border-color: #ccc;
}

.person-avatar {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  overflow: hidden;

  background: var(--tag-bg);
  display: flex;
  align-items: center;
  justify-content: center;

  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);

  margin-bottom: 0.8rem;
}

.person-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.person-name {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.2rem;
}

.person-role {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--muted);
  font-family: var(--font-mono);
}

/* HERO */
.hero { padding: 5rem 2rem 3.5rem; max-width: var(--max-w); margin: 0 auto; }
.hero-eyebrow { font-size: 0.77rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--muted); font-family: var(--font-mono); margin-bottom: 1rem; }
.hero h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); font-weight: 500; letter-spacing: -0.03em; line-height: 1.15; color: var(--accent); max-width: 800px; margin-bottom: 1.2rem; }
.hero-desc { font-size: 1.05rem; color: var(--muted); max-width: 560px; line-height: 1.75; margin-bottom: 2.5rem; }
.quick-links { display: flex; gap: 0.85rem; flex-wrap: wrap; }
.quick-link { display: inline-flex; align-items: center; gap: 0.35rem; padding: 0.5rem 1.1rem; border: 1px solid var(--border); border-radius: var(--radius); font-size: 0.84rem; color: var(--accent); text-decoration: none; font-family: var(--font-mono); transition: all var(--tr); background: var(--surface); }
.quick-link:hover { background: var(--accent); color: #fff; border-color: var(--accent); }

/* PROJECT SECTION (landing) */
.projects-section { max-width: var(--max-w); margin: 0 auto; padding: 0 2rem 5rem; }
.section-label { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--muted); font-family: var(--font-mono); margin-bottom: 1.2rem; padding-bottom: 0.55rem; border-bottom: 1px solid var(--border); }
.project-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1.1rem; }
.project-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.7rem; text-decoration: none; color: inherit; display: flex; flex-direction: column; gap: 0.55rem; transition: box-shadow var(--tr), border-color var(--tr), transform var(--tr); }
.project-card:hover { box-shadow: 0 4px 22px rgba(0,0,0,0.09); border-color: var(--accent); transform: translateY(-2px); }
.project-card-num { font-family: var(--font-mono); font-size: 0.72rem; color: var(--muted); letter-spacing: 0.08em; }
.project-card h3 { font-size: 1.08rem; font-weight: 600; color: var(--accent); }
.project-card p { font-size: 0.88rem; color: var(--muted); line-height: 1.6; flex: 1; }
.project-card-arrow { align-self: flex-end; font-size: 0.82rem; color: var(--accent); font-family: var(--font-mono); margin-top: 0.3rem; transition: transform var(--tr); }
.project-card:hover .project-card-arrow { transform: translateX(4px); }
.project-logo {
  width: 220px;
  height: 220px;
  object-fit: contain;
  border-radius: 8px;
  flex-shrink: 0;
}

/* PROJECT BANNER */
.project-banner { background: var(--accent); color: white; padding: 2.3rem 2rem; }
.project-banner-inner { max-width: var(--max-w); margin: 0 auto; }
.project-banner .eyebrow { font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; font-family: var(--font-mono); opacity: 0.6; margin-bottom: 0.5rem; }
.project-banner h1 { font-size: 1.85rem; font-weight: 500; letter-spacing: -0.02em; margin-bottom: 0.45rem; }
.project-banner p { opacity: 0.75; font-size: 0.95rem; max-width: 560px; }

/* STATS */
.stats-row { display: flex; gap: 2.5rem; padding: 1.1rem 0; margin-bottom: 1.8rem; border-bottom: 1px solid var(--border); }
.stat-num { font-size: 1.55rem; font-weight: 700; color: var(--accent); font-family: var(--font-mono); }
.stat-label { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.07em; color: var(--muted); }

/* MISC */
.no-results { padding: 2.5rem 0; text-align: center; color: var(--muted); font-size: 0.92rem; font-style: italic; display: none; }
footer { border-top: 1px solid var(--border); padding: 1.6rem 2rem; text-align: center; font-size: 0.78rem; color: var(--muted); font-family: var(--font-mono); background: var(--surface); }
/* ── Footer logos ─────────────────────────────────────────── */
.footer-logos {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 2.5rem;
  flex-wrap: wrap;
  margin-bottom: 1.2rem;
}
.footer-logos a { display: flex; align-items: center; }
.footer-logos img {
  height: 40px;
  width: auto;
  object-fit: contain;
  opacity: 0.7;
  filter: grayscale(20%);
  transition: opacity 180ms ease, filter 180ms ease;
}
.footer-logos img:hover { opacity: 1; filter: none; }
.footer-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 0.75rem;
}
.footer-links a {
  font-size: 0.78rem;
  color: var(--muted);
  text-decoration: none;
  font-family: var(--font-mono);
}
.footer-links a:hover { color: var(--text); }
.footer-copy {
  font-size: 0.75rem;
  color: var(--muted);
  font-family: var(--font-mono);
}

@media (max-width: 640px) {
  .nav-links a { padding: 0.3rem 0.42rem; font-size: 0.75rem; }
  .hero { padding: 2.5rem 1.2rem 2rem; }
  .projects-section { padding: 0 1.2rem 3.5rem; }
  .page-wrap { padding: 2rem 1.2rem 4rem; }
  .stats-row { gap: 1.2rem; flex-wrap: wrap; }
  .project-banner { padding: 1.8rem 1.2rem; }
}

/* ── News (index) ─────────────────────────────────────────── */
.news-section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem 4rem;
}
.news-list {
  list-style: none;
  display: flex;
  flex-direction: column;
}
.news-item {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 0 1.8rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--border);
}
.news-item:first-child { border-top: 1px solid var(--border); }
.news-date {
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: var(--muted);
  padding-top: 0.15rem;
  white-space: nowrap;
}
.news-text {
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--text);
}

/* ── Funding (index) ──────────────────────────────────────── */
.funding-section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem 5rem;
}
.funding-logos {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem 2.5rem;
  align-items: center;
  margin-top: 1rem;
}
.funding-logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
}
.funding-logo img {
  height: 48px;
  width: auto;
  object-fit: contain;
  filter: grayscale(20%);
  opacity: 0.85;
  transition: opacity 180ms ease;
}
.funding-logo:hover img { opacity: 1; filter: none; }
.funding-logo-name {
  font-size: 0.72rem;
  font-family: var(--font-mono);
  color: var(--muted);
  letter-spacing: 0.04em;
}
.funding-text-item {
  padding: 0.5rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-family: var(--font-mono);
  color: var(--muted);
  background: var(--surface);
}

@media (max-width: 640px) {
  .news-item { grid-template-columns: 1fr; gap: 0.2rem; }
  .news-date { padding-bottom: 0.2rem; }
}