:root { color-scheme: dark; }
html, body { margin: 0; background: #0b0e14; color: #c9d1d9; font: 14px/1.5 system-ui, -apple-system, Segoe UI, Roboto, sans-serif; }
#onramp-element { min-height: 60vh; }
#msg { padding: 16px; text-align: center; }
#msg:empty { display: none; }