:root {
  --bg-dark: #121316;
  --bg-panel: #1c1e22;
  --bg-panel-alt: #23262b;
  --border-gray: #33363c;
  --text-main: #e6e6e6;
  --text-muted: #a8abb3;
  --gold: #d4af37;
  --gold-light: #e8c766;
}

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

body {
  background: var(--bg-dark);
  color: var(--text-main);
  font-family: 'Georgia', 'Times New Roman', serif;
  line-height: 1.7;
}

a { color: var(--gold-light); text-decoration: none; }
a:hover { color: var(--gold); text-decoration: underline; }

/* --- Nav --- */
nav.topnav {
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border-gray);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 2rem;
  position: sticky;
  top: 0;
  z-index: 100;
  flex-wrap: wrap;
  gap: 0.6rem;
}

nav.topnav .brand {
  font-family: 'Trajan Pro', 'Georgia', serif;
  letter-spacing: 0.12em;
  font-size: 1.3rem;
  color: var(--gold);
  text-transform: uppercase;
}

nav.topnav ul {
  list-style: none;
  display: flex;
  gap: 1.6rem;
  flex-wrap: wrap;
}

nav.topnav ul li a {
  color: var(--text-muted);
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

nav.topnav ul li a:hover,
nav.topnav ul li a.active {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
}

/* --- Layout --- */
main {
  max-width: 860px;
  margin: 0 auto;
  padding: 3rem 1.5rem 5rem;
}

.hero {
  text-align: center;
  padding: 3rem 1rem 2rem;
  border-bottom: 1px solid var(--border-gray);
  margin-bottom: 2.5rem;
}

.hero h1 {
  font-size: 3rem;
  letter-spacing: 0.15em;
  color: var(--gold);
  text-transform: uppercase;
}

.hero p.tagline {
  color: var(--text-muted);
  font-style: italic;
  font-size: 1.15rem;
  margin-top: 0.6rem;
}

.hero-image {
  margin: 2rem auto 0.5rem;
  max-width: 40%;
  border: 1px solid var(--border-gray);
  background: var(--bg-panel-alt);
  min-height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  text-align: center;
  padding: 1rem;
}

.credit {
  color: var(--text-muted);
  font-size: 0.85rem;
  text-align: center;
  margin-bottom: 2rem;
}

h2 {
  color: var(--gold);
  font-size: 1.6rem;
  letter-spacing: 0.03em;
  margin: 2.2rem 0 1rem;
  border-left: 3px solid var(--gold);
  padding-left: 0.7rem;
}

h3 { color: var(--gold-light); margin: 1.2rem 0 0.6rem; }

p { margin-bottom: 1.1rem; color: var(--text-main); }

.callout {
  background: var(--bg-panel);
  border: 1px solid var(--border-gray);
  border-left: 3px solid var(--gold);
  padding: 1rem 1.4rem;
  margin: 1.5rem 0;
  color: var(--text-muted);
}

/* --- Thumbnail grid (home page) --- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1.8rem;
  margin: 2.5rem 0;
}

.grid-item { text-align: center; }

.grid-item .thumb {
  display: flex;
  height: 140px;
  background: var(--bg-panel-alt);
  border: 1px solid var(--border-gray);
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 0.6rem;
  transition: border-color 0.2s;
}

.grid-item .thumb:hover { border-color: var(--gold); }

.grid-item h3 { margin: 0; font-size: 1.05rem; }

/* --- Tables --- */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.95rem;
}

th, td {
  border: 1px solid var(--border-gray);
  padding: 0.6rem 0.8rem;
  text-align: left;
}

th {
  background: var(--bg-panel);
  color: var(--gold);
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
}

td { color: var(--text-muted); }

/* --- Team --- */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.team-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-gray);
  padding: 1.2rem;
  text-align: center;
}

.team-card .avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--bg-panel-alt);
  margin: 0 auto 0.8rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.75rem;
  border: 1px solid var(--border-gray);
}

.team-card .role {
  color: var(--gold);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.team-card .inst {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: 0.3rem;
}

/* --- Publications --- */
.pub-entry {
  background: var(--bg-panel);
  border: 1px solid var(--border-gray);
  padding: 1.3rem 1.5rem;
  margin-bottom: 1.5rem;
}

.pub-entry h3 { margin-top: 0; }

.pub-entry .authors { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 0.6rem; }

.pub-entry .links a { margin-right: 1rem; font-size: 0.9rem; }

/* --- Gallery --- */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.2rem;
  margin: 2rem 0;
}

.gallery-item {
  height: 160px;
  background: var(--bg-panel-alt);
  border: 1px solid var(--border-gray);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* --- Footer --- */
footer {
  border-top: 1px solid var(--border-gray);
  padding: 2rem 1.5rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

footer .icons a {
  margin: 0 0.6rem;
  color: var(--text-muted);
}

footer .icons a:hover { color: var(--gold); }