Button Size and Center

HTML

<section class="callToAction">
        <a class="button" href="#">Tell Your Friends</a>
        <a class="button" href="#">Get Started</a>
    </section>

CSS

.button {
    padding: 10px 15px;
    width: 450px;
    background-color:deepskyblue;
    color: white;
    margin: 3px;
}

.callToAction {
    margin: 30px 0;
    display: flex;
    justify-content: center;
}