html, body { margin: 0; height: 100%; background: #fff; }
@media (prefers-color-scheme: dark) { html, body { background: #1b1b1b; } }
/* Full screen on the home screen: the portal fills the page, clear of the iPhone's home bar. */
body { display: flex; flex-direction: column; padding-bottom: env(safe-area-inset-bottom); box-sizing: border-box; }
#portal { flex: 1; width: 100%; border: 0; display: block; }
#nojs { font: 16px/1.4 system-ui, sans-serif; padding: 16px; }