/* One fixed-scale vellum field; the permanent Thread remains its own layer. */
:root { --paper: #e7e3d9; }
body {
  background-color: var(--paper);
  background-image: linear-gradient(rgba(231, 227, 217, .68), rgba(231, 227, 217, .68)), url('../images/vellum-field.png');
  background-repeat: repeat;
  background-size: auto, 800px 800px;
}
.at-article-reading { background-color: rgba(249, 247, 239, .56); }