Overleaf/services/web/frontend/fonts/material-symbols.css

@font-face {
  font-family: 'Material Symbols Rounded';
  font-style: normal;
  font-weight: 100 700;
  font-display: block;
  src: url('material-symbols/MaterialSymbolsRounded[FILL,GRAD,opsz,wght].woff2')
    format('woff2');
}

.material-symbols {
  font-family: 'Material Symbols Rounded';
  font-weight: normal;
  font-style: normal;
  font-size: 20px;
  line-height: 1;
  letter-spacing: normal;
  text-transform: none;
  display: inline-block;
  white-space: nowrap;
  word-wrap: normal;
  direction: ltr;
  font-feature-settings: 'liga';
  -webkit-font-smoothing: antialiased;
}

.material-symbols.material-symbols-rounded {
  font-variation-settings: 'FILL' 1, 'wght' 400, 'GRAD' 0, 'opsz' 20;
}