:root {
  --bg: #f7f8fb;
  --text: #1f2430;
  --muted: #5b6475;
  --accent: #244a7c;
  --card: #ffffff;
  --border: #d9dfeb;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}
.wrap {
  width: min(980px, calc(100% - 2rem));
  margin: 0 auto;
}
.site-header {
  background: white;
  border-bottom: 1px solid var(--border);
  padding: 1.25rem 0;
}
.site-header h1 { margin: 0; }
.tagline { color: var(--muted); margin: 0.25rem 0 0.75rem; }
nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}
nav a {
  text-decoration: none;
  color: var(--accent);
  font-weight: 600;
}
main { padding: 2rem 0 3rem; }
.hero {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 1.5rem;
  margin-bottom: 2rem;
}
.card, .paper {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem 1.1rem;
}
section { margin-top: 2rem; }
.page-intro { color: var(--muted); max-width: 60ch; }
.people-list, .pub-list, .paper-list { list-style: none; padding: 0; }
.people-list li, .pub-list li { margin-bottom: 0.9rem; }
.paper-meta {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 0.4rem;
}
.score {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  background: #e8eef8;
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 700;
}
.mini-badge {
  display: inline-block;
  padding: 0.12rem 0.45rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 700;
}
.badge-openai {
  background: #e7f7ee;
  color: #196c3a;
}
.badge-pdf {
  background: #fce8e6;
  color: #a03222;
}
.badge-fallback {
  background: #f1f3f4;
  color: #55606d;
}
footer { color: var(--muted); margin-top: 2rem; }
code { background: #eef2f8; padding: 0.1rem 0.25rem; border-radius: 4px; }
.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}
.tab-button {
  border: 1px solid var(--border);
  background: white;
  color: var(--accent);
  border-radius: 999px;
  padding: 0.55rem 0.95rem;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}
.tab-button.active {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}
.tab-panels {
  margin-top: 1rem;
}
.tab-panel {
  margin-top: 0;
}
.archive-count {
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 500;
}

@media (max-width: 720px) {
  .hero { grid-template-columns: 1fr; }
  .tabs { gap: 0.5rem; }
}