.container-index {
    height: 100%;
    margin: 0;
    padding: 0;
}

img {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: auto;
    padding: 0;
    display: block;
    margin: 0 auto;
    max-height: 100%;
    max-width: 100%;
    z-index: -2;
}

.text-center {
    color: white;
    position: fixed;
    top: 45%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 24px;
}

.button-center {
    color: white;
    position: fixed;
    top: 85%;
    left: 50%;
    transform: translate(-50%, -50%);
}


