user-css for new github

gistfile1.txt

:root {
  --width: 1200px;
}

.container-xl {
  max-width: var(--width);
}

.pagehead {
  padding-left: calc(50% - (var(--width) / 2));
  padding-right: calc(50% - (var(--width) / 2));
}

* {
  border-radius: 0 !important;
}