:root{color-scheme:light;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:linear-gradient(135deg,#667eea,#764ba2);min-height:100%}*{box-sizing:border-box}body,html{padding:0;margin:0;min-height:100%}body{display:flex;align-items:center;justify-content:center}main{width:100%;max-width:960px;padding:24px}