a:link, a:visited {
    background-color: green;
    color: white;
    padding: 25px 40px;
    font-family: monospace;
    font-size: 4em;
    text-align: center;
    text-decoration: none;
    display: inline-block;
}
a:hover, a:active {
    background-color: #43f236;
}
h1 {
    text-align: center;
    font-family: monospace;
    font-size: 3.5em;
}
h2 {
    font-family: monospace;
    font-size: 3em;
}
p {
    text-align: center;
}
img {
    display: block;
    margin-left: auto;
    margin-right: auto;
    max-width: 90%;
    max-height: 90%;
}
br {
    line-height: 500%;
}