:root {
  --fg: #1a1a1a;
  --muted: #555;
  --bg: #ffffff;
  --accent: #0b66c2;
  --border: #e4e4e4;
  --code-bg: #f5f5f7;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  color: var(--fg);
  background: var(--bg);
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 1.25rem;
}

header.title {
  text-align: center;
  padding: 3rem 0 1.5rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2rem;
}

header.title h1 {
  font-size: 2rem;
  font-weight: 700;
  margin: 0 0 1.25rem;
  line-height: 1.25;
}

.authors {
  margin: 0.75rem 0;
  font-size: 1.05rem;
  color: var(--fg);
}

.authors sup { font-size: 0.75em; color: var(--muted); }

.affiliations {
  color: var(--muted);
  font-size: 0.95rem;
  margin-top: 0.25rem;
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  justify-content: center;
  margin: 1.5rem 0 0;
}

.links a {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.45rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 2rem;
  color: var(--fg);
  text-decoration: none;
  font-size: 0.92rem;
  background: #fafafa;
  transition: background 0.15s, border-color 0.15s;
}

.links a:hover {
  background: #f0f4fa;
  border-color: var(--accent);
  color: var(--accent);
}

h2 {
  font-size: 1.4rem;
  margin: 2.5rem 0 0.75rem;
  padding-bottom: 0.25rem;
  border-bottom: 1px solid var(--border);
}

h3 { font-size: 1.1rem; margin: 1.5rem 0 0.5rem; }

p { margin: 0.75rem 0; }

a { color: var(--accent); }

figure {
  margin: 1.5rem 0;
  text-align: center;
}
figure img {
  max-width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: 6px;
}
figure figcaption {
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 0.5rem;
  line-height: 1.45;
}

pre, code {
  font-family: "SF Mono", Menlo, Monaco, Consolas, "Courier New", monospace;
  font-size: 0.88rem;
}

pre {
  background: var(--code-bg);
  padding: 1rem;
  border-radius: 6px;
  overflow-x: auto;
  line-height: 1.45;
}

code {
  background: var(--code-bg);
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
}

pre code { background: none; padding: 0; }

table {
  border-collapse: collapse;
  width: 100%;
  margin: 1rem 0;
  font-size: 0.95rem;
}
table th, table td {
  text-align: left;
  padding: 0.55rem 0.75rem;
  border-bottom: 1px solid var(--border);
}
table th {
  background: #fafafa;
  font-weight: 600;
}

.bibtex {
  background: var(--code-bg);
  padding: 1rem;
  border-radius: 6px;
  white-space: pre;
  overflow-x: auto;
  font-family: "SF Mono", Menlo, Monaco, Consolas, "Courier New", monospace;
  font-size: 0.85rem;
  line-height: 1.45;
}

footer {
  margin: 3.5rem 0 1rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 0.85rem;
  color: var(--muted);
}

@media (max-width: 640px) {
  header.title h1 { font-size: 1.5rem; }
  .container { padding: 1.25rem 1rem; }
}