html, body {
    height: 100%;
}
body {
    background-color: #5FAD26;
    margin: 0;
}
h1 {
    font-size: 8em;
}

.flex-container {
    height: 100%;
    padding: 0;
    margin: 0;
    display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: -webkit-flex;
    display: flex;
    align-items: center;
    justify-content: center;
}
.row {
    width: auto;
    border: 0px;
}
.teaser {
    text-align: center;
}