40media prefers color scheme

1.day   { background: #eee; color: black; }
2.night { background: #333; color: white; }
3
4@media (prefers-color-scheme: dark) {
5  .day.dark-scheme   { background:  #333; color: white; }
6  .night.dark-scheme { background: black; color:  #ddd; }
7}
8
9@media (prefers-color-scheme: light) {
10  .day.light-scheme   { background: white; color:  #555; }
11  .night.light-scheme { background:  #eee; color: black; }
12}
13
14.day, .night {
15  display: inline-block;
16  padding: 1em;
17  width: 7em;
18  height: 2em;
19  vertical-align: middle;
20}
21