body {
  filter: grayscale(90%) contrast(105%) brightness(98%);
  -webkit-filter: grayscale(90%) contrast(105%) brightness(98%);
  background-color: #ffffff;
  color: #000000;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
}