body {font-family: -apple-system, BlinkMacSystemFont;background:#111;color:white;margin:0;}
.card {padding:20px;margin:20px;background:#1e1e1e;border-radius:12px;}
input,button {width:100%;padding:14px;margin-top:10px;border-radius:8px;border:none;}
button {background:#8b0000;color:white;}