* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

h1 {
    text-align: center;
}

footer {
    position: fixed;
    bottom: 0;
    width: 100%;
    background-color: #f1f1f1;
    text-align: center;
    padding: 10px 0;
    font-size: 14px;
}