body{margin:0;background:#0b1220;font-family:Arial;color:#fff;display:flex;justify-content:center;align-items:center;height:100vh}.top{position:absolute;top:20px;left:20px}#menu{background:#162033;padding:10px;border-radius:8px;margin-top:8px} .hide{display:none}.card{background:#172235;padding:30px;border-radius:18px;box-shadow:0 0 30px rgba(0,0,0,.4);width:320px}input,button{width:100%;padding:12px;margin:8px 0;border-radius:8px;border:none}button{background:#22c1c3;color:#fff}