.carregando_tela {
    position: absolute;
    width: 100%;
    height: 100%;
    background-color: #d0d0d0;
    opacity: 0.2;
    text-align: center;
    font-size: 40px;
    vertical-align: middle;
    cursor: not-allowed;
    padding-top: 20px;

}

.box.p-2 {
    position: relative;
    height: 100%;
    min-height: 100px;
}