body, html {
    height: 100%;
    margin: 0;
}

body {
    font-family: Arial, sans-serif;
    text-align: center;
    background-color: #f4f4f4;
}

header {
    width: 100%;
    display: flex;
    justify-content: center;
}

header img {
    width: 100%;
    height: auto;
    max-width: 100vw;
}

main {
    padding: 20px;
}

footer {
    background-color: rgba(244, 244, 244, 0.8);
    padding: 10px;
    position: fixed;
    width: 100%;
    bottom: 0;
}