.center {
    margin: 50vh 50vw;
}

#wrapper {
    font-size: 2em;
    text-align: center;
    margin: 45vh auto;
}

.btn-launch {
    background: #2e3d49;
    font-size: 1em;
    color: #ffffff;
    border-radius: 8px;
    cursor: pointer;
    justify-content: center;
    align-items: center;
    padding: .5em;
    box-shadow: 5px 2px 20px 0 rgba(46, 61, 73, 0.5);
}