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

body {
    background: linear-gradient(to right, #131313, #333333) no-repeat;
    background-size: cover;
    color: white;
    font-family: Arial, sans-serif;
}


header {
    text-align: center;
    padding: 20px;
}