#home {
    background: #444;
    height: 100%;
    width: 100%;
    position: absolute;
    top: 0;
    left: 0;
}
#home h1 a {
    display: block;
    position: absolute;
    top: 50%;
    left: 50%;
    background-color: #00CD62;
    padding: 10px;
    width: 490px;
    margin-left: -250px;
    margin-top: -30px;
    text-align: center;
    text-decoration: none;
    color: #000;
    box-shadow: 0 1px 3px rgba(0,0,0,0.5);
}
#home h1 a:hover {
    text-decoration: underline;
}