.modal-crow {
    position: fixed;
    width: 100%;
    height: 100vh;
    background: rgba(0, 0, 0, .9);
    top: 0;
    left: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 9000
}

.canvas-crow {
    position: relative;
    width: 90%;
    max-width: 500px;
    border: 2px solid #000;
}

@media (min-width: 768px) {
    .canvas-crow {
        max-width: 800px;
    } 
}

.modal__img-crow {
    width: 100%;
    position: relative;
    vertical-align: top;
    border: 8px solid #fff;
    border-top-left-radius: 4px;
    box-shadow: 0 2px 15px 2px #000;
    -webkit-box-shadow: 0 2px 15px 2px #000;
}

.precarga-crow {
    background: transparent url(../img/update.gif) center no-repeat;
}