html { background-color: #ddd; box-sizing: border-box; } body { color: #222; font-family: Helvetica, sans-serif; font-size: 1.4em; margin-left: auto; margin-right: auto; max-width: 800px; text-align: center; } .details { margin-top: 4em; } .logo { display: block; height: 7em; margin: 3em auto; } .url { background-color: #eee; border: 1px solid #bfbfbf; border-radius: 5px; font-family: monospace; padding: 10px; } @media (prefers-color-scheme: dark) { html { background-color: #404040; } body { color: #aeaeae !important; } .url { background-color: #383838; } }