* {
    font-family:'Helvetica', 'Arial', 'Sans-Serif';
}
body {
    margin: 60px auto;
    width: 70%;
}
a {
    font-weight: bold;
    text-decoration: none;
    color: green;
}
a:hover {
    text-decoration: underline;
}
h1 {
    font-size: 3em;
}
h2 {
    font-size: 2em;
}
p {
    font-size: 1.5em;
    line-height: 1.4em;
    color: black;
}