body {
    background-color: #000; 
    font-family: "Open Sans";
    color: #008040;
    font-size: 1.2rem;
}
section {
    padding: 1em;
    height: 100vh;
    display: flex;
    flex-flow: row;
    align-items: center;
    justify-content: center;
}

section > .flex-item {
    display: flex;
    flex-flow: column;
    flex-grow: 1;
    align-items: center;
    width: 100%;
    margin: auto;
    min-height: 300px;
}
a {
    color: #008040;
    text-decoration:none;
}