watch-tfa/style.css

@media (prefers-color-scheme: dark){
		body {
			background:#42;
      color:#FF;
		}

body {
  margin: 40px auto;
  max-width: 650px;
  line-height: 1.6;
  font-family:"Segoe UI", Segoe, Tahoma, Geneva, sans-serif;
  font-size: 18px;
  color: #42;
  padding: 0 8px;
}