*,*:before,*:after{box-sizing:border-box}body{margin:0;min-height:100vh;font-family:Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:linear-gradient(135deg,#b91c1c,#7f1d1d 55%,#58151a);color:#0f172a}button,input{font-family:inherit}