body{
font-family:Arial, sans-serif;
background:#0f172a;
color:white;
text-align:center;
margin:0;
}

header{
background:#020617;
padding:20px;
font-size:26px;
}

.container{
margin-top:80px;
}

button{
padding:15px 30px;
font-size:18px;
border-radius:10px;
border:none;
background:#2563eb;
color:white;
cursor:pointer;
}

button:hover{
background:#1d4ed8;
}