.container{max-width:600px;background:white;padding:20px;border-radius:10px;box-shadow:0 0 10px rgba(0, 0, 0, 0.1);margin:auto;}
.submit-btn {
background: #007bff;
color: white;
border: none;
padding: 10px;
font-size: 16px;
cursor: pointer;
}