.center-wrapper {
    /* Remember to use the other versions for IE 10 and older browsers! */
    background-color: #e7ebf2;
    /*background-image: url("../img/background-dna.jpg");*/
    background-size: cover;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100%;
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    margin: 0;
}
.center-wrapper.gims,
.center-wrapper.lisapp2 {
    background-image: url("../img/background-dna.jpg");
}
.center-wrapper.ecrf {
    background-image: url("../img/background-doctor_1920.jpg");
    background-blend-mode: overlay;
    background-color: #555;
}
.center-wrapper > div.center {
    justify-content: center;
    align-items: center;
    width: auto !important;
    height: auto !important;
}

.center-wrapper > div.center > .container {
    background-color: rgba(255,255,255,0.95);
    border-radius: 5px;
    border: 1px solid #c5c8ce;
    box-shadow: 0 1.5px 0 0 rgba(0,0,0,0.1);
    width: 450px !important;
    display: flex;
    flex-direction: column;
}

.center-wrapper h1 {
    margin-top: 0em;
}
.center-wrapper h1,
.center-wrapper h2,
.center-wrapper h3,
.center-wrapper h4,
.center-wrapper h5,
.center-wrapper h6 {
    color: #3b5998;
}