:root { color-scheme: light; }
* { box-sizing: border-box; }
html, body { width: 100%; height: 100%; margin: 0; }
body { overflow: hidden; background: #fff; font-family: Arial, Helvetica, sans-serif; }
.site-frame { position: relative; width: 100%; height: 100%; }
iframe { position: relative; z-index: 2; display: block; width: 100%; height: 100%; border: 0; background: #fff; }
.fallback { position: absolute; inset: 0; z-index: 1; display: grid; place-items: center; padding: 24px; text-align: center; background: #f5f5f5; color: #222; }
.fallback h1 { margin: 0 0 12px; }
.fallback p { margin: 8px 0; }
.fallback a { color: #0b5cab; font-weight: 700; }