.float {
    position: fixed;
    justify-content: center;
    align-items: center;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,.5);
    z-index: 100;
}
.content_float {
    position: relative;
    width: 400px;
    height: 400px;
    background-image: url(../../images/floater.jpg);
    background-repeat: no-repeat;
    background-size: contain;
}
span.closed_float {
    position: absolute;
    display: flex;
    justify-content: center;
    align-items: center;
    top: 0;
    right: 0;
    font-size: 20px;
    padding: 0 10px 5px;
    height: auto;
    width: auto;
    cursor: pointer;
}

@media (max-width: 450px) {
    .content_float {
        width: 90%;
    }
}