body{
font-family: Arial;
background: linear-gradient(135deg,#0f2027,#203a43,#2c5364);
color:white;
text-align:center;
}

.container{
margin-top:100px;
}

.card{
background:rgba(255,255,255,0.1);
padding:40px;
border-radius:10px;
width:400px;
margin:auto;
}

button{
padding:10px 20px;
border:none;
background:#00c3ff;
color:white;
border-radius:5px;
cursor:pointer;
}

button:hover{
background:#0099cc;
}