:root{--lime:#bfff00;--bg-app:#0c0c0e;--track:#252530;--white:#fff}*,:before,:after{box-sizing:border-box}body{background:var(--bg-app);min-height:100vh;color:var(--white);place-items:center;margin:0;padding:2rem;font-family:system-ui,-apple-system,Segoe UI,sans-serif;line-height:1.5;display:grid}