body {
    font-family: Arial, sans-serif;
    background-color: #f5f5f5;
}
 
.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 40px;
    background-color: #fff;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}
 
h1 {
    text-align: center;
    margin-bottom: 40px;
}
 
h2 {
    margin-bottom: 20px;
}
 
.form-group {
    margin-bottom: 20px;
}
 
.btn-primary {
    display: block;
    width: 100%;
}