:root{--bg:#f4f4f4;--surface:#fff;--text:#1a1a1a;--text-muted:#666;--accent:#0057b8;--border:#e0e0e0}*,:before,:after{box-sizing:border-box}html,body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;margin:0;padding:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;font-size:16px;line-height:1.5}a{color:inherit}button,input{font-family:inherit}img{max-width:100%;display:block}