body {
    font-family: Arial, sans-serif;
    background: #f0f8ff;
    margin: 0;
    padding: 0;
}
header {
    background-color: #3399ff;
    color: white;
    padding: 20px;
    display: flex;
    align-items: center;
}
.logo {
    height: 50px;
    margin-right: 20px;
}
main {
    padding: 20px;
}
footer {
    text-align: center;
    font-size: 13px;
    color: #555;
    margin-top: 40px;
    padding: 20px;
}