.close-modalPruebalo {
    position: relative;
    width: 100%;
    text-align: center;
    margin-top: 40px;
}
.closebt {
    -webkit-transition: all 0.2s;
    -moz-transition: all 0.2s;
    -ms-transition: all 0.2s;
    -o-transition: all 0.2s;
    transition: all 0.2s;
    cursor: pointer;
}
.closebt:hover {
    transform: rotate(90deg);
}
.modal-container {
    position: relative;
    margin-top: 100px;
    overflow: hidden;
}

@media only screen and (max-width: 767px) {
    .close-modalPruebalo {
        margin-top: 20px;
    }
    .closebt {
        width: 45px;
    }
}