* {
    box-sizing: border-box;
}

body {
    margin: 0;
}

header {
    background-color: lightblue;
    padding: 10px;
    text-align: center;
}

main {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    padding: 10px;
    margin-bottom: 30px;
}

#cookie {
    margin: 20px;
    border-radius: 50%;
    width: 400px;
    height: 400px;
    background-image: url('images/cookie_400.png');
}

#cookie:hover {
    cursor: pointer;
}

footer {
    position: fixed;
    bottom: 0;
    width: 100%;
    background-color: lightgray;
    padding: 10px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}