.centralizar {
    min-height: 85vh;
    display: grid;
    align-items: center;
}

.item-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

form {
    z-index: 2;
}

#imagem-fundo {
    height: 100vh;
    position: absolute;
    left: 0px;
    right: 0px;
    bottom: 0px;
    top: 0px;
    width: 100%;
    opacity: 1.0;
    z-index: 1;
    background-position: center center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-size: 100vw;
}

.provaVestibular > .text-center{
    z-index: 2;
}

body {
    overflow: hidden;
}