html, head, body{
    margin: 0;
    padding: 0;
}
body{
    font-family: Arial;
    background-color: #FFF;
    color: #009900;
}
header, main, footer, h1, p{
    display: block;
}
h1, footer p{
    text-align: center;
}
footer p{
    color: #666;
}
a{
    color: #FF9900;
}
a:hover{
    text-decoration: none;
}
.py-5{
    padding: 12px;
}