a {
    text-align: center;
    display: block;
    text-decoration: none;
    line-height: 200%;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f0f0f0;
    color: #111;
    margin: 20px;
    padding: 10px;
}

a:hover {
    background-color: #e7e7e7;
}