.theme-sober{
  background:#f8f9fa;
  color:#222;
}

.theme-matrix{
  background:#020617;
  color:#9effc3;
}

.theme-matrix .system-bar{
  background:rgba(0,0,0,.8);
  border-color:#22c55e;
}

.theme-matrix li:hover{
  background:rgba(34,197,94,.2);
}