body {
    font-family: Arial, sans-serif;
    background-color: #f5f5f5;
    margin: 0;
    padding: 0;
}

header {
    background-color: #3399cc;
    color: #fff;
    text-align: center;
    padding: 2rem 0;
}

h1 {
    font-size: 36px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    text-align: center;
}

p {
    font-size: 18px;
}

.btn {
    display: inline-block;
    background-color: #3399cc;
    color: #fff;
    text-decoration: none;
    padding: 10px 20px;
    border-radius: 5px;
    margin-top: 20px;
}