body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    text-align: center;
    background-color: #f0f8ff;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}
header {
    background-color: #007BFF;
    color: white;
    padding: 30px 0;
    position: relative;
}
header h1 {
    margin: 0;
    font-size: 3em;
}
header h1 a {
    color: white;
    text-decoration: none;
}
footer {
    background-color: #333;
    color: white;
    padding: 20px;
    text-align: center;
}
footer a {
    color: #007BFF;
    text-decoration: none;
}