body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  max-width: 980px;
  margin: 40px auto;
  padding: 0 22px;
  line-height: 1.62;
  color: #202124;
  background: #ffffff;
}
header, main, footer { display: block; }
h1 { font-size: 2rem; line-height: 1.2; margin-bottom: 0.4em; }
h2 { margin-top: 1.8em; border-bottom: 1px solid #ddd; padding-bottom: 0.25em; }
a { color: #0645ad; }
.paper-list { padding-left: 1.2em; }
.paper-list li { margin-bottom: 1em; }
.meta { color: #555; }
pre, code { background: #f6f8fa; border-radius: 6px; }
pre { padding: 14px; overflow-x: auto; white-space: pre-wrap; }
.file-links li { margin: 0.35em 0; }
.badge { display: inline-block; padding: 0.1em 0.5em; border: 1px solid #ddd; border-radius: 999px; font-size: 0.9em; color: #555; }
footer { margin-top: 3em; padding-top: 1em; border-top: 1px solid #eee; color: #666; font-size: 0.95em; }