body {
    font-family: Arial;
}

header {
    position: relative;
    width: 1000px;
    height: 150px;
    padding: 50px;
    margin: auto;
    background-color: darkorchid;
}

h1 {
    text-align: center;
}

#cta {
    padding: 20px;
    position: absolute;
    bottom: 20px;
    right: 20px;
    text-align: center;
    text-decoration: none;
    background-color: chartreuse;
    color: black;
}