/* pantallas chicas */
@media (max-width: 767px){
    #imgcentral
    {
        width:80%;
    }
    #imglogo
    {
        width:100%;
    }
    .contindex
    {
        padding:10px !important;
        font-size: .75rem;
    }
    input, nav, .btn, .breadcrumb-item, .dataTables_info, #tabladatos_wrapper
    {
        font-size: .75rem !important;
    }
    .form-control-sm
    {
        width:65% !important;
    }

    div.dataTables_wrapper div.dataTables_length
    {
        text-align: left;
    }
    .card-body {
       padding: .25rem;
    }
    .formulario {
        padding: 1rem;
    }
}
/* pantallas grandes */
@media (min-width: 768px){
    #imgcentral
    {
        width:50%;
    }    
}

.overlay {
    display: none;
    position: fixed;
    /* full screen */
    width: 100vw;
    height: 100vh;
    /* transparent black */
    background: rgba(0, 0, 0, 0.7);
    /* middle layer, i.e. appears below the sidebar */
    z-index: 998;
    opacity: 0;
    /* animate the transition */
    transition: all 0.5s ease-in-out;
}
.overlay.active {
    display: block;
    opacity: 1;
}

#dismiss {
    width: 35px;
    height: 35px;
    position: absolute;
    /* top right corner of the sidebar */
    top: 10px;
    right: 10px;
}

input::-webkit-input-placeholder{
    color:red !important;
    opacity: 10% !important;
}
input:-moz-placeholder {
    color:red !important;
    opacity: 10% !important;
}