body {
    font-family: Arial, sans-serif;
    background: #f7f7f7;
    color: #222;
    margin: 0;
    padding: 0;
}
.container {
    max-width: 700px;
    margin: 40px auto;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    padding: 32px;
}
.btn {
    background: #007bff;
    color: #fff;
    border: none;
    padding: 10px 24px;
    border-radius: 4px;
    cursor: pointer;
}
.btn:hover {
    background: #0056b3;
}