:root { color-scheme: light; font-family: Arial, Helvetica, sans-serif; --sr: env(safe-area-inset-right,0px); --sb: env(safe-area-inset-bottom,0px); }
* { box-sizing: border-box; }
html, body { min-height: 100%; margin: 0; touch-action: manipulation; }
body { background: #f7f7f7; color: #444; }
main { display: grid; min-height: 100dvh; padding: 28px; place-items: center; }
section { width: min(100%, 460px); }
h1 { margin: 0 0 12px; font-size: 1.35rem; font-weight: 600; line-height: 1.3; }
p { margin: 0; color: #666; font-size: .94rem; line-height: 1.5; }